JP7110198B2 - Pair of Bilateral Asymmetrical Staple Forming Pockets - Google Patents

Description

The present invention relates to surgical instruments and, in various configurations, to surgical stapling and severing instruments designed to staple and sever tissue, and staple cartridges for use therewith.

Various features of the embodiments described herein, together with their advantages, can be understood by the following description in conjunction with the accompanying drawings below.
1 is a side elevational view of a surgical system comprising a handle assembly and a plurality of interchangeable surgical instrument assemblies that may be used therewith; FIG. 2 is a perspective view of one of the interchangeable surgical instrument assemblies of FIG. 1 operably coupled to the handle assembly of FIG. 1; FIG. 3 is an exploded view of a portion of the surgical instrument assembly of FIGS. 1 and 2; FIG. 3 is a perspective view of another one of the interchangeable surgical instrument assemblies of FIG. 1; FIG. 5 is a partial cross-sectional perspective view of the interchangeable surgical instrument assembly of FIG. 4; FIG. 6 is another partial cross-sectional view of a portion of the interchangeable surgical instrument assembly of FIGS. 4 and 5; FIG. Figure 7 is an exploded view of a portion of the interchangeable surgical instrument assembly of Figures 4-6; 8 is an enlarged plan view of a portion of the elastic spine assembly of the interchangeable surgical instrument assembly of FIG. 7; FIG. 8 is another exploded view of a portion of the interchangeable surgical instrument assembly of FIGS. 4-7; FIG. 9 is another cross-sectional perspective view of the surgical end effector portion of the interchangeable surgical instrument assembly of FIGS. 4-8; FIG. 10 is an exploded view of the surgical end effector portion of the interchangeable surgical instrument assembly shown in FIG. 9; FIG. 11A and 11B are perspective, side, and front views of an embodiment of a firing member that may be used with the interchangeable surgical instrument assembly of FIG. 10; 5 is a perspective view of an anvil that may be used with the interchangeable surgical instrument assembly of FIG. 4; FIG. 13 is a side cross-sectional view of the anvil of FIG. 12; FIG. Figure 14 is a bottom view of the anvil of Figures 12 and 13; 5 is a side view of a portion of the surgical end effector and shaft portion of the interchangeable surgical instrument assembly of FIG. 4 with an unused or unfired surgical staple cartridge properly seated in the elongate channel of the surgical end effector; It is a cross-sectional view. 16 is another side cross-sectional view of the surgical end effector and shaft portion of FIG. 15 after the surgical staple cartridge has been at least partially fired and its firing members have been retracted to the starting position; FIG. 17 is another side cross-sectional view of the surgical end effector and shaft portion of FIG. 16 after the firing member has been fully retracted to the starting position; FIG. 16 is a top cross-sectional view of the surgical end effector and shaft portion shown in FIG. 15 with an unused or unfired surgical staple cartridge properly seated in an elongated channel of the surgical end effector; FIG. 19 is another top cross-sectional view of the surgical end effector of FIG. 18 with a surgical staple cartridge mounted therein showing the firing member at least partially fired and held in a locked position; FIG. 5 is a partial cross-sectional view of a portion of the anvil and elongated channel of the interchangeable instrument assembly of FIG. 4; FIG. 21 is an exploded side view of a portion of the anvil and elongated channel of FIG. 20; FIG. FIG. 10 is a rear perspective view of an anvil attachment portion of an anvil embodiment; FIG. 10 is a rear perspective view of an anvil mounting portion of another anvil embodiment; FIG. 10 is a rear perspective view of an anvil mounting portion of another anvil embodiment; FIG. 10 is a perspective view of an anvil embodiment; 26 is an exploded perspective view of the anvil of FIG. 25; FIG. 26 is a cross-sectional end view of the anvil of FIG. 25; FIG. FIG. 10 is a perspective view of another anvil embodiment; 29 is an exploded perspective view of the anvil embodiment of FIG. 28; FIG. 29 is a plan view of the distal end of the anvil body portion of the anvil of FIG. 28; FIG. FIG. 10 is a plan view of the distal end of an anvil body portion of another anvil embodiment; 32 is a cross-sectional end perspective view of the anvil of FIG. 31; FIG. FIG. 11 is a cross-sectional end perspective view of another anvil embodiment; FIG. 10 is a perspective view of an embodiment of a closure member comprising a distal closure tube portion; 35 is a side cross-sectional view of the closure member embodiment of FIG. 34; FIG. FIG. 10 is a partial cross-sectional view of an embodiment of an interchangeable surgical instrument assembly showing the position of the anvil in the fully closed position, the anvil mounting portion, and its firing member in the starting position; 37 is another partial cross-sectional view of the interchangeable surgical instrument assembly of FIG. 36 at the beginning of the opening process; FIG. 38 is another partial cross-sectional view of the interchangeable surgical instrument assembly of FIG. 37 with the anvil in a fully open position; FIG. 37 is a side elevational view of a portion of the interchangeable surgical instrument assembly of FIG. 36; FIG. 38 is a side elevational view of a portion of the interchangeable surgical instrument assembly of FIG. 37; FIG. 39 is a side elevational view of a portion of the interchangeable surgical instrument assembly of FIG. 38; FIG. FIG. 10 is a side cross-sectional view of an embodiment of a closure member; Figure 43 is a cross-sectional end view of the closure member of Figure 42; FIG. 10 is a cross-sectional end view of another closure member embodiment; FIG. 10 is a cross-sectional end view of an embodiment of a closure member; FIG. 10 is a cross-sectional end view of another closure member embodiment; 2 is a partial cross-sectional view of a portion of the surgical end effector of the interchangeable instrument assembly illustrated in FIG. 1; FIG. 6 is a partial cross-sectional view of a portion of a surgical end effector of the interchangeable surgical instrument assembly of FIG. 5; FIG. 49 is another cross-sectional view of the surgical end effector of FIG. 48; FIG. FIG. 12 is a partial perspective view of a portion of the underside of an anvil embodiment; 6 is a partial cross-sectional view of a portion of the interchangeable surgical instrument assembly of FIG. 5 with its surgical end effector anvil in a fully open position; FIG. 52 is another partial cross-sectional view of a portion of the interchangeable surgical instrument assembly of FIG. 51 with the anvil of its surgical end effector in a first closed position in a fully closed position; FIG. 52 at the beginning of the firing process with the anvil in the first closed position and the firing member of its surgical end effector moved distally from the starting position; FIG. is another partial cross-sectional view of the . 52 with the anvil in the second closed position and the firing member advanced distally into the surgical staple cartridge of its surgical end effector, another portion of the interchangeable surgical instrument assembly of FIG. FIG. 4 is a partial cross-sectional view; 4 is a graphical comparison of firing energy versus time for different interchangeable surgical instrument assemblies; 4 is a graphical representation of a comparison of force to firing enhancement and firing load versus firing distance traveled by its firing member for four different interchangeable surgical instrument assemblies; FIG. 12 is a cross-sectional perspective view of a staple forming pocket arrangement comprising proximal and distal forming pockets, each pocket comprising a pair of angled side walls and forming surfaces; 58 is a plan view of the staple forming pocket arrangement of FIG. 57; FIG. 59 is a cross-sectional view of the staple forming pocket arrangement of FIG. 57 taken along line 59-59 of FIG. 58; FIG. 60 is a cross-sectional view of the staple forming pocket arrangement of FIG. 57 taken along line 60-60 of FIG. 58; FIG. 61 is a cross-sectional view of the staple forming pocket arrangement of FIG. 57 taken along line 61-61 of FIG. 58; FIG. 62 is a cross-sectional view of the staple forming pocket arrangement of FIG. 57 taken along line 62-62 of FIG. 58; FIG. FIG. 12 is a cross-sectional perspective view of a staple forming pocket arrangement comprising proximal and distal forming pockets, each pocket comprising forming surfaces having entry and exit regions with different radii of curvature; 64 is a plan view of the staple forming pocket arrangement of FIG. 63; FIG. 65 is a cross-sectional view of the staple forming pocket arrangement of FIG. 63 taken along line 65-65 of FIG. 64; FIG. 66 is a cross-sectional view of the staple forming pocket arrangement of FIG. 63 taken along line 66-66 of FIG. 64; FIG. 67 is a cross-sectional view of the staple forming pocket arrangement of FIG. 63 taken along line 67-67 of FIG. 64; FIG. 68 is a cross-sectional view of the staple forming pocket arrangement of FIG. 63 taken along line 68-68 of FIG. 64; FIG. each pocket comprising a pair of pocket sidewalls extending from the main sidewall to the forming surface of the pocket at a second angle different from the first angle, the proximal forming pocket, the distal forming pocket and the planar anvil; Fig. 10 is a cross-sectional perspective view of a staple forming pocket arrangement with a pair of major sidewalls extending from the surface to the pocket at a first angle; FIG. 70 is a plan view of the staple forming pocket arrangement of FIG. 69; 71 is a cross-sectional view of the staple forming pocket arrangement of FIG. 69 taken along line 71-71 of FIG. 70; FIG. 72 is a cross-sectional view of the staple forming pocket arrangement of FIG. 69 taken along line 72-72 of FIG. 70; FIG. 73 is a cross-sectional view of the staple forming pocket arrangement of FIG. 69 taken along line 73-73 of FIG. 70; FIG. 74 is a cross-sectional view of the staple forming pocket arrangement of FIG. 69 taken along line 74-74 of FIG. 70; FIG. FIG. 12 is a cross-sectional perspective view of a staple forming pocket arrangement comprising a proximal forming pocket, a distal forming pocket and a major sidewall, each pocket comprising a pair of pocket sidewalls and each pocket sidewall comprising a separate sidewall portion; . 76 is a plan view of the staple forming pocket arrangement of FIG. 75; FIG. 77 is a cross-sectional view of the staple forming pocket arrangement of FIG. 75 taken along line 77-77 of FIG. 76; FIG. 78 is a cross-sectional view of the staple forming pocket arrangement of FIG. 75 taken along line 78-78 of FIG. 76; FIG. 79 is a cross-sectional view of the staple forming pocket arrangement of FIG. 75 taken along line 79-79 of FIG. 76; FIG. 80 is a cross-sectional view of the staple forming pocket arrangement of FIG. 75 taken along line 80-80 of FIG. 76; FIG. FIG. 12 is a cross-sectional perspective view of a staple forming pocket arrangement comprising a proximal forming pocket, a distal forming pocket, and a major sidewall, each pocket comprising a pair of contoured sidewalls; 82 is a plan view of the staple forming pocket arrangement of FIG. 81; FIG. 83 is a cross-sectional view of the staple forming pocket arrangement of FIG. 81 taken along line 83-83 of FIG. 82; FIG. 84 is a cross-sectional view of the staple forming pocket arrangement of FIG. 81 taken along line 84-84 of FIG. 82; FIG. 85 is a cross-sectional view of the staple forming pocket arrangement of FIG. 81 taken along line 85-85 of FIG. 82; FIG. 86 is a cross-sectional view of the staple forming pocket arrangement of FIG. 81 taken along line 86-86 of FIG. 82; FIG. FIG. 10 is a plan view of a staple forming pocket arrangement comprising proximal and distal forming pockets, each pocket comprising a forming surface having a groove defined therein; 88 is a cross-sectional view of the staple forming pocket arrangement of FIG. 87 taken along line 88-88 of FIG. 87; FIG. FIG. 89 is an enlarged view of the proximal forming pocket of the staple forming pocket arrangement shown in FIG. 88; 90 is a cross-sectional view of the staple forming pocket arrangement of FIG. 87 taken along line 90-90 of FIG. 87; FIG. 91 is a cross-sectional view of the staple forming pocket arrangement of FIG. 87 taken along line 91-91 of FIG. 87; FIG. 92 is a cross-sectional view of the staple forming pocket arrangement of FIG. 87 taken along line 92-92 of FIG. 87; FIG. FIG. 10 is a plan view of a staple forming pocket arrangement comprising proximal and distal forming pockets, each pocket comprising a forming surface having a segmented groove defined therein; 94 is a cross-sectional view of the staple forming pocket arrangement of FIG. 93 taken along line 94-94 of FIG. 93; FIG. 95 is a cross-sectional view of the staple forming pocket arrangement of FIG. 93 taken along line 95-95 of FIG. 93; FIG. 96 is a cross-sectional view of the staple forming pocket arrangement of FIG. 93 taken along line 96-96 of FIG. 93; FIG. 97 is a cross-sectional view of the staple forming pocket arrangement of FIG. 93 taken along line 97-97 of FIG. 93; FIG. A staple forming pocket arrangement comprising proximal and distal forming pockets, each pocket comprising a forming surface having a groove defined therein, and wherein the pocket is bilaterally asymmetrical with respect to the bridge of the pair of pockets. , plan view. 99 is a cross-sectional view of the staple forming pocket arrangement of FIG. 98 taken along line 99-99 of FIG. 98; FIG. 100 is a cross-sectional view of the staple forming pocket arrangement of FIG. 98 taken along line 100-100 of FIG. 98; FIG. 101 is a cross-sectional view of the staple forming pocket arrangement of FIG. 98 taken along line 101-101 of FIG. 98; FIG. 102 is a cross-sectional view of the staple forming pocket arrangement of FIG. 98 taken along line 102-102 of FIG. 98; FIG. A staple forming pocket comprising a proximal forming pocket and a distal forming pocket, each pocket comprising forming surfaces having entry and exit regions with different radii of curvature and each forming surface comprising a groove defined therein Fig. 10 is a plan view of the array; 104 is a cross-sectional view of the staple forming pocket arrangement of FIG. 103 taken along line 104-104 of FIG. 103; FIG. 105 is a cross-sectional view of the staple forming pocket arrangement of FIG. 103 taken along line 105-105 of FIG. 103; FIG. 106 is a cross-sectional view of the staple forming pocket arrangement of FIG. 103 taken along line 106-106 of FIG. 103; FIG. 107 is a cross-sectional view of the staple forming pocket arrangement of FIG. 103 taken along line 107-107 of FIG. 103; FIG. Each pocket comprises a pair of contoured side walls and a forming surface groove defined therein, and comprises a proximal forming pocket and a distal forming pocket, the pocket being bilaterally asymmetrical with respect to the bridge of the pocket pair. Fig. 10 is a plan view of a staple forming pocket arrangement; 109 is a cross-sectional view of the staple forming pocket arrangement of FIG. 108 taken along line 109-109 of FIG. 108; FIG. 110 is a cross-sectional view of the staple forming pocket arrangement of FIG. 108 taken along line 110-110 of FIG. 108; FIG. 111 is a cross-sectional view of the staple forming pocket arrangement of FIG. 108 taken along line 111-111 of FIG. 108; FIG. 112 is a cross-sectional view of the staple forming pocket arrangement of FIG. 108 taken along line 112-112 of FIG. 108; FIG. Proximal and distal forming pockets, each with forming surface grooves defined therein, wherein the pockets are bilaterally symmetrical with respect to the bridge of the pocket pair and rotationally asymmetrical with respect to the midsection of the bridge. 1 is a plan view of a staple forming pocket arrangement with forming pockets; FIG. 114 is a cross-sectional view of the staple forming pocket arrangement of FIG. 113 taken along line 114-114 of FIG. 113; FIG. 115 is a cross-sectional view of the staple forming pocket arrangement of FIG. 113 taken along line 115-115 of FIG. 113; FIG. 116 is a cross-sectional view of the staple forming pocket arrangement of FIG. 113 taken along line 116-116 of FIG. 113; FIG. 117 is a cross-sectional view of the staple forming pocket arrangement of FIG. 113 taken along line 117-117 of FIG. 113; FIG. A proximally formed pocket and proximal, wherein the pocket is bilaterally symmetrical with respect to the bridge of the pocket pair, bilaterally symmetrical with respect to the pocket axis of the pocket pair, and rotationally asymmetrical with respect to the middle portion of the bridge. FIG. 10 is a plan view of a staple forming pocket arrangement with a distal forming pocket that is different from the forming pocket; 119 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 119-119 of FIG. 118; FIG. 120 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 120-120 of FIG. 118; FIG. 121 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 121-121 of FIG. 118; FIG. 122 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 122-122 of FIG. 118; FIG. 123 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 123-123 of FIG. 118; FIG. 124 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 124-124 of FIG. 118; FIG. 125 is a cross-sectional view of the staple forming pocket arrangement of FIG. 118 taken along line 125-125 of FIG. 118; FIG. FIG. 12 is a partial cross-sectional view of a stapling assembly in a fully clamped but non-parallel configuration; 127 is an elevation view of a staple formed by the stapling assembly of FIG. 126; FIG. FIG. 12 is a partial cross-sectional view of another stapling assembly in a fully clamped but non-parallel configuration; 129 is an elevation view of a staple formed by the stapling assembly of FIG. 128; FIG. FIG. 10 is a bottom view of an anvil with identical formed pockets; FIG. 10 is a bottom view of an anvil with laterally varying forming pocket pairs; FIG. 10 is a bottom view of an anvil with longitudinally varying forming pocket pairs; FIG. 10 is a bottom view of an anvil with forming pocket pairs that vary in lateral and longitudinal directions; 2 is a table identifying certain features of various forming pocket sequences. 134 includes cross-sectional views of different forming pocket arrangements corresponding to various features listed in the table of FIG. 3 is a comparison of forming pocket sequences, staples formed by these forming pocket sequences, and the maximum force required to fire these staples against these forming pocket sequences. 135 is a table identifying additional features of the formed pocket arrays shown in the table of FIG. 134; FIG. 12 illustrates a staple in a fully formed configuration and in an overdrive configuration formed by a formed pocket arrangement according to at least one embodiment; FIG. FIG. 12 illustrates a staple in a fully formed configuration and in an overdrive configuration formed by a formed pocket arrangement according to at least one embodiment; FIG. FIG. 12 illustrates staples in first and second stages of the forming process formed by forming pocket arrangements according to at least one embodiment; FIG. 141 shows the staple of FIG. 140 in third and fourth stages of the forming process formed by the forming pocket arrangement of FIG. 140; FIG. 12 illustrates staples in first and second stages of the forming process formed by forming pocket arrangements according to at least one embodiment; FIG. 143 shows the staple of FIG. 142 in third and fourth stages of the forming process formed by the forming pocket arrangement of FIG. 142; FIG. 11 illustrates staples at various stages of formation formed by a forming pocket arrangement according to at least one embodiment; FIG. FIG. 11 illustrates staples at various stages of formation formed by a forming pocket arrangement according to at least one embodiment; FIG. 64 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 63 in a fully formed configuration; 3 is a comparison of formed pocket sequences and staples formed by the formed pocket sequences. 76 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 75 in a fully formed configuration; 70 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 69 in a fully formed configuration; 82 shows staples in aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 81 in a fully formed configuration; FIG. 82 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 81 in a fully formed configuration; 109 shows staples in aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 108 in a fully formed configuration; 109 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 108 in a fully formed configuration; 58 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 57 in a fully formed configuration; again, 88 shows staples in non-aligned contact with forming pockets formed by the forming pocket arrangement of FIG. 87 in a fully formed configuration;

Corresponding reference characters indicate corresponding parts throughout the several drawings. The exemplifications set forth herein are intended to illustrate various embodiments of the invention in one form, and such exemplifications are to be construed as limiting the scope of the invention in any manner. shouldn't.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- U.S. Patent Application No. __________, entitled "SURGICAL STAPLING INSTRUMENTS AND REPLACEABLE TOOL ASSEMBLIES THEREOF", Attorney Docket No. END7980USNP/160155;
- U.S. Patent Application No. __________, entitled "ARTICULATABLE SURGICAL STAPLING INSTRUMENTS", Attorney Docket No. END7981USNP/160156,
- U.S. Patent Application No. __________, entitled "LOCKOUT ARRANGEMENTS FOR SURGICAL END EFFECTORS", Attorney Docket No. END7982USNP/160157,
- U.S. Patent Application No. __________, entitled "SURGICAL END EFFECTORS AND FIRING MEMBERS THEREOF", Attorney Docket No. END7983USNP/160158,
- U.S. Patent Application No. __________, entitled "LOCKOUT ARRANGEMENTS FOR SURGICAL END EFFECTORS AND REPLACEABLE TOOL ASSEMBLIES," Attorney Docket No. END7984USNP/160159; AND ADAPTABLE FIRING MEMBERS THEREFOR, Attorney Docket No. END7985USNP/160160.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- U.S. Patent Application No. ________, entitled "STAPLE CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES THEREIN", Attorney Docket No. END7986USNP/160161,
－米国特許出願第＿＿＿＿＿＿＿号、発明の名称「ＳＵＲＧＩＣＡＬ ＴＯＯＬ ＡＳＳＥＭＢＬＩＥＳ ＷＩＴＨ ＣＬＵＴＣＨＩＮＧ ＡＲＲＡＮＧＥＭＥＮＴＳ ＦＯＲ ＳＨＩＦＴＩＮＧ ＢＥＴＷＥＥＮ ＣＬＯＳＵＲＥ ＳＹＳＴＥＭＳ ＷＩＴＨ ＣＬＯＳＵＲＥ ＳＴＲＯＫＥ ＲＥＤＵＣＴＩＯＮ ＦＥＡＴＵＲＥＳ ＡＮＤ ＡＲＴＩＣＵＬＡＴＩＯＮ ＡＮＤ ＦＩＲＩＮＧ ＳＹＳＴＥＭＳ」、代理人整理番号第ＥＮＤ７９８７ＵＳＮＰ／１６０１６２号、
- U.S. Patent Application No. __________, entitled "SURGICAL STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS", Attorney Docket No. END7988USNP/160163,
- U.S. Patent Application No. __________, entitled "SURGICAL TOOL ASSEMBLIES WITH CLOSURE STROKE REDUCTION FEATURES", Attorney Docket No. END7989USNP/160164,
- U.S. Patent Application No. ________, entitled "STAPLE CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES THEREIN", Attorney Docket No. END7990USNP/160165,
- U.S. Patent Application No. ________, entitled "SURGICAL STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS", Attorney Docket No. END7991USNP/160166,
- U.S. Patent Application No. __________, entitled "SURGICAL INSTRUMENTS WITH JAW OPENING FEATURES FOR INCREASING A JAW OPENING DISTANCE", Attorney Docket No. END7992USNP/160167,
- U.S. Patent Application No. __________, entitled "METHODS OF STAPLING TISSUE", Attorney Docket No. END7993USNP/160168,
- U.S. Patent Application No. __________, entitled "FIRING MEMBERS WITH NON-PARALLEL JAW ENGAGEMENT FEATURES FOR SURGICAL END EFFECTORS", Attorney Docket No. END7994USNP/160169,
- U.S. Patent Application No. __________, entitled "SURGICAL END EFFECTORS WITH EXPANDABLE TISSUE STOP ARRANGEMENTS", Attorney Docket No. END7995USNP/160170,
- U.S. Patent Application No. __________, entitled "SURGICAL STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS", Attorney Docket No. END7996USNP/160171,
- U.S. Patent Application No. __________, entitled "SURGICAL INSTRUMENT WITH POSITIVE JAW OPENING FEATURES", Attorney Docket No. END7997USNP/160172,
－米国特許出願第＿＿＿＿＿＿＿号、発明の名称「ＳＵＲＧＩＣＡＬ ＩＮＳＴＲＵＭＥＮＴＳ ＷＩＴＨ ＬＯＣＫＯＵＴ ＡＲＲＡＮＧＥＭＥＮＴＳ ＦＯＲ ＰＲＥＶＥＮＴＩＮＧ ＦＩＲＩＮＧ ＳＹＳＴＥＭ ＡＣＴＵＡＴＩＯＮ ＵＮＬＥＳＳ ＡＮ ＵＮＳＰＥＮＴ ＳＴＡＰＬＥ ＣＡＲＴＲＩＤＧＥ ＩＳ ＰＲＥＳＥＮＴ」、代理人整理番号第ＥＮＤ７９９８ＵＳＮＰ／１６０１７３号、及び －米国特許出願第＿＿＿＿＿＿＿号、 Title of Invention "STAPLE CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES THEREIN", Attorney Docket No. END7999USNP/160174.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- U.S. Patent Application No. __________, entitled "METHOD FOR RESETTING A FUSE OF A SURGICAL INSTRUMENT SHAFT", Attorney Docket No. END8013USNP/160175;
- U.S. Patent Application No. __________, entitled "STAPLE FORMING POCKET ARRANGEMENT TO ACCOMMODATE DIFFERENT TYPES OF STAPLES", Attorney Docket No. END8014USNP/160176;
- U.S. Patent Application No. ________, entitled "SURGICAL INSTRUMENT COMPRISING IMPROVED JAW CONTROL", Attorney Docket No. END8016USNP/160178,
- U.S. Patent Application No. __________, entitled "STAPLE CARTRIDGE AND STAPLE CARTRIDGE CHANNEL COMPRISING WINDOWS DEFINED THEREIN", Attorney Docket No. END8017USNP/160179,
- US Patent Application No. __________, entitled "SURGICAL INSTRUMENT COMPRISING A CUTTING MEMBER", Attorney Docket No. END8018USNP/160180,
- U.S. Patent Application No. __________, entitled "STAPLE FIRING MEMBER COMPRISING A MISSING CARTRIDGE AND/OR SPENT CARTRIDGE LOCKOUT", Attorney Docket No. END8019USNP/160181,
- U.S. Patent Application No. __________, entitled "FIRING ASSEMBLY COMPRISING A LOCKOUT", Attorney Docket No. END8020USNP/160182,
- U.S. Patent Application No. ________, entitled "SURGICAL INSTRUMENT SYSTEM COMPRISING AN END EFFECTOR LOCKOUT AND A FIRRING ASSEMBLY LOCKOUT", Attorney Docket No. END8021USNP/160183,
- U.S. Patent Application No. __________, entitled "FIRING ASSEMBLY COMPRISING A FUSE," Attorney Docket No. END8022USNP/160184; FUSE," Attorney Docket No. END8023USNP/160185.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- U.S. Patent Application No. ________, entitled "STAPLE FORMING POCKET ARRANGEMENTS", Attorney Docket No. END8038USNP/160186,
- U.S. Patent Application No. ________, entitled "ANVIL ARRANGEMENTS FOR SURGICAL STAPLERS", Attorney Docket No. END8039USNP/160187,
- U.S. Patent Application No. __________, entitled "METHOD OF DEFORMING STAPLES FROM TWO DIFFERENT TYPES OF STAPLE CARTRIDGES WITH THE SAME SURGICAL STAPLING INSTRUMENT", Attorney Docket No. END80418USNP9, Attorney Docket No. END80418USNP9
- U.S. Patent Application No. __________, entitled "CLOSURE MEMBERS WITH CAM SURFACE ARRANGEMENTS FOR SURGICAL INSTRUMENTS WITH SEPARATE AND DISTINCT CLOSURE AND FIRRING SYSTEMS", Attorney Docket No. END8160USN91,
- U.S. Patent Application No. __________, entitled "SURGICAL STAPLERS WITH INDEPENDENTLY ACTUAL CLOSING AND FIRRING SYSTEMS", Attorney Docket No. END8044USNP/160192,
- U.S. Patent Application No. ________, entitled "SURGICAL STAPLING INSTRUMENTS WITH SMART STAPLE CARTRIDGES", Attorney Docket No. END8045USNP/160193,
- U.S. Patent Application No. __________, entitled "STAPLE CARTRIDGE COMPRISING STAPLES WITH DIFFERENT CLAMPING BREADTHS", Attorney Docket No. END8047USNP/160195,
- U.S. Patent Application No. __________, entitled "STAPLE FORMING POCKET ARRANGEMENTS COMPRISING PRIMARY SIDEWALLS AND POCKET SIDEWALLS", Attorney Docket No. END8048USNP/160196,
- U.S. Patent Application No. ________, entitled "NO-CARTRIDGE AND SPENT CARTRIDGE LOCKOUT ARRANGEMENTS FOR SURGICAL STAPLERS", Attorney Docket No. END8050USNP/160198,
- US Patent Application No. __________, entitled "FIRING MEMBER PIN ANGLE", Attorney Docket No. END8051USNP/160199,
- U.S. Patent Application No. __________, entitled "STAPLE FORMING POCKET ARRANGEMENTS COMPRISING ZONED FORMING SURFACE GROOVES", Attorney Docket No. END8052USNP/160200,
- U.S. Patent Application No. __________, entitled "SURGICAL INSTRUMENT WITH MULTIPLE FAILURE RESPONSE MODES", Attorney Docket No. END8053USNP/160201,
- U.S. Patent Application No. ________, entitled "SURGICAL INSTRUMENT WITH PRIMARY AND SAFETY PROCESSORS," Attorney Docket No. END8054USNP/160202,
- U.S. Patent Application No. __________, entitled "SURGICAL INSTRUMENTS WITH JAWS THAT ARE PIVOTABLE ABOUT A FIXED AXIS AND INCLUDE SEPARATE AND DISTINCT CLOURE AND FIRRING SYSTEMS", Attorney Docket No. EUSNDP405/60261
- US Patent Application No. ________, entitled "ANVIL HAVING A KNIFE SLOT WIDTH", Attorney Docket No. END8057USNP/160205,
- U.S. Patent Application No. __________, entitled "CLOSURE MEMBER ARRANGEMENTS FOR SURGICAL INSTRUMENTS," Attorney Docket No. END8058USNP/160206; Person Docket No. END8059USNP/160207.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- U.S. Patent Application No. ________, entitled "STEPPED STAPLE CARTRIDGE WITH ASYMMETRICAL STAPLES", Attorney Docket No. END8000USNP/160208,
- U.S. Patent Application No. ________, entitled "STEPPED STAPLE CARTRIDGE WITH TISSUE RETENTION AND GAP SETTING FEATURES", Attorney Docket No. END8001USNP/160209;
- U.S. Patent Application No. __________, entitled "STAPLE CARTRIDGE WITH DEFORMABLE DRIVER RETENTION FEATURES", Attorney Docket No. END8002USNP/160210,
- U.S. Patent Application No. __________, entitled "DURABILITY FEATURES FOR END EFFECTORS AND FIRRING ASSEMBLIES OF SURGICAL STAPLING INSTRUMENTS", Attorney Docket No. END8003USNP/160211,
- U.S. Patent Application No. __________, entitled "SURGICAL STAPLING INSTRUMENTS HAVING END EFFECTORS WITH POSITIVE OPENING FEATURES," Attorney Docket No. END8004USNP/160212; DEPOSABLE LOADING UNITS FOR SURGICAL STAPLING INSTRUMENTS”, Attorney Docket No. END8005USNP/160213.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- U.S. Patent Application No. __________, entitled "METHOD FOR ATTACHING A SHAFT ASSEMBLY TO A SURGICAL INSTRUMENT AND, ALTERNATIVELY, TO A SURGICAL ROBOT", Attorney Docket No. END8006USNP/160214,
- U.S. Patent Application No. __________, entitled "SHAFT ASSEMBLY COMPRISING A MANUALLY-OPERABLE RETRACTION SYSTEM FOR USE WITH A MOTORIZED SURGICAL INSTRUMENT SYSTEM," Attorney Docket No. END8007USNP5/160
- U.S. Patent Application No. __________, entitled "SHAFT ASSEMBLY COMPRISING SEPARATELY ACTUATABLE AND RETRACTABLE SYSTEMS", Attorney Docket No. END8008USNP/160216;
- U.S. Patent Application No. __________, entitled "SHAFT ASSEMBLY COMPRISING A CLUTCH CONFIGURED TO ADAPT THE OUTPUT OF A ROTARY FIRRING MEMBER TO TWO DIFFERENT SYSTEMS", Attorney Docket No. END1/10602 USN 8009
- U.S. Patent Application No. __________, Titled "SURGICAL SYSTEM COMPRISING A FIRRING MEMBER ROTATABLE INTO AN ARTICULATION STATE TO ARTICULATE AN END EFFECTOR OF THE SURGICAL SYSTEM", Attorney Docket No. 10/80, DSN 80/16 EN P 80
- U.S. Patent Application No. ________, entitled "SHAFT ASSEMBLY COMPRISING A LOCKOUT," Attorney Docket No. END8011USNP/160219; , Attorney Docket No. END8012USNP/160220.

The applicant of this application owns the following US patent applications filed on even date herewith, each of which is hereby incorporated by reference in its entirety:
- US Patent Application No. __________, entitled "SURGICAL STAPLING SYSTEMS", Attorney Docket No. END8024USNP/160221,
- US Patent Application No. __________, entitled "SURGICAL STAPLING SYSTEMS", Attorney Docket No. END8025USNP/160222,
- US Patent Application No. __________, entitled "SURGICAL STAPLING SYSTEMS", Attorney Docket No. END8026USNP/160223,
- U.S. Patent Application No. __________, entitled "SURGICAL STAPLE CARTRIDGE WITH MOVABLE CAMTING MEMBER CONFIGURED TO DISENGAGE FIRRING MEMBER LOCKOUT FEATURES", Attorney Docket No. END8027USNP/160224;
- US Patent Application No. __________, entitled "SURGICAL STAPLING SYSTEMS", Attorney Docket No. END8028USNP/160225,
－米国特許出願第＿＿＿＿＿＿＿号、発明の名称「ＪＡＷ ＡＣＴＵＡＴＥＤ ＬＯＣＫ ＡＲＲＡＮＧＥＭＥＮＴＳ ＦＯＲ ＰＲＥＶＥＮＴＩＮＧ ＡＤＶＡＮＣＥＭＥＮＴ ＯＦ Ａ ＦＩＲＩＮＧ ＭＥＭＢＥＲ ＩＮ Ａ ＳＵＲＧＩＣＡＬ ＥＮＤ ＥＦＦＥＣＴＯＲＳ ＵＮＬＥＳＳ ＡＮ ＵＮＦＩＲＥＤ ＣＡＲＴＲＩＤＧＥ ＩＳ ＩＮＳＴＡＬＬＥＤ ＩＮ ＴＨＥ ＥＮＤ ＥＦＦＥＣＴＯＲ」、代理人整理番号第ＥＮＤ８０２９ＵＳＮＰ／１６０２２６号、
- U.S. Patent Application No. ________, entitled "AXIALLY Movable Closure System Arrangements For Applying Closure Motions To Jaws Of Surgical Instruments," Attorney Docket No. END8030USNP/160227;
- U.S. Patent Application No. __________, entitled "PROTECTIVE COVER ARRANGEMENTS FOR A JOINT INTERFACE BETWEEN A Movable Jaw and Actuator Shaft Of A Surgical Instrument," Attorney Docket No. END8160USNP8/No.
- U.S. Patent Application No. __________, entitled "SURGICAL END EFFECTOR WITH TWO SEPARATE COOPERATION OPENING FEATURES FOR OPENING AND CLOSING END EFFECTOR JAWS", Attorney Docket No. END8032USNP/16
- U.S. Patent Application No. __________, entitled "ARTICULATABLE SURGICAL END EFFECTOR WITH ASYMMETRIC SHAFT ARRANGEMENT", Attorney Docket No. END8033USNP/160230,
- U.S. Patent Application No. ________, entitled "ARTICULATABLE SURGICAL INSTRUMENT WITH INDEPENDENT PIVOTABLE LINKAGE DISTAL OF AN ARTICULATION LOCK", Attorney Docket No. END8034USNP/160231,
- U.S. Patent Application No. __________, Titled "ARTICULATION LOCK ARRANGEMENTS FOR LOCKING AN END EFFECTOR IN AN ARTICULATED POSITION IN RESPONSE TO ACTION OF A JAW CLOSURE SYSTEM," Attorney Docket No. 326/80 DEPARTMENT No. 326
－米国特許出願第＿＿＿＿＿＿＿号、発明の名称「ＬＡＴＥＲＡＬＬＹ ＡＣＴＵＡＴＡＢＬＥ ＡＲＴＩＣＵＬＡＴＩＯＮ ＬＯＣＫ ＡＲＲＡＮＧＥＭＥＮＴＳ ＦＯＲ ＬＯＣＫＩＮＧ ＡＮ ＥＮＤ ＥＦＦＥＣＴＯＲ ＯＦ Ａ ＳＵＲＧＩＣＡＬ ＩＮＳＴＲＵＭＥＮＴ ＩＮ ＡＮ ＡＲＴＩＣＵＬＡＴＥＤ ＣＯＮＦＩＧＵＲＡＴＩＯＮ」、代理人整理番号第ＥＮＤ８０３６ＵＳＮＰ／１６０２３３号、及び －米国特許出願第＿＿＿＿＿＿＿号, the title of the invention "ARTICULATABLE SURGICAL INSTRUMENTS WITH ARTICULATION STROKE AMPLIFICATION FEATURES", Attorney Docket No. END8037USNP/160234.

The applicant of the present application owns the following US patent applications filed June 24, 2016, the entire contents of each of which are incorporated herein by reference:
- US patent application Ser. No. 15/191,775, entitled "STAPLE CARTRIDGE COMPRISING WIRE STAPLES AND STAMPED STAPLES"
- US patent application Ser. No. 15/191,807, entitled "STAPLING SYSTEM FOR USE WITH WIRE STAPLES AND STAMPED STAPLES,"
- U.S. patent application Ser.
- US patent application Ser. No. 15/191,788, entitled "STAPLE CARTRIDGE COMPRISING OVERDRIVEN STAPLES," and - US patent application Ser.

The applicant of the present application owns the following US patent applications filed June 24, 2016, the entire contents of each of which are incorporated herein by reference:
- US Design Patent Application No. 29/569,218, entitled "SURGICAL FASTENER";
- US Design Patent Application No. 29/569,227, entitled "SURGICAL FASTENER";
- US Design Patent Application No. 29/569,259, entitled "SURGICAL FASTENER CARTRIDGE," and - US Design Patent Application No. 29/569,264, entitled "SURGICAL FASTENER CARTRIDGE."

The applicant of this application owns the following US patent applications, filed April 1, 2016, each of which is hereby incorporated by reference in its entirety:
- US Patent Application No. 15/089,325, entitled "METHOD FOR OPERATING A SURGICAL STAPLING SYSTEM",
- US patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 15/089,263, entitled "SURGICAL INSTRUMENT HANDLE ASSEMBLY WITH RECONFIGURABLE GRIP PORTION",
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- US Patent Application No. 15/089,203, entitled "SURGICAL STAPLING SYSTEM COMPRISING A JAW ATTACHMENT LOCKOUT",
- U.S. patent application Ser.
- US Patent Application No. 15/089,324, entitled "SURGICAL INSTRUMENT COMPRISING A SHIFTING MECHANISM",
- U.S. patent application Ser.
- US patent application Ser. No. 15/089,339, entitled "SURGICAL STAPLING INSTRUMENT",
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 15/089,331, entitled "ANVIL MODIFICATION MEMBERS FOR SURGICAL STAPLERS",
- US Patent Application No. 15/089,336, entitled "STAPLE CARTRIDGES WITH ATRAUMATIC FEATURES",
- US patent application Ser.
- US patent application Ser. No. 15/089,309, entitled "CIRCULAR STAPLING SYSTEM COMPRISING ROTARY FIRING SYSTEM," and - US patent application Ser.

The applicant of the present application also owns the following identified U.S. patent applications filed December 31, 2015, the entire contents of each of which are incorporated herein by reference: .
- U.S. patent application Ser.
- U.S. patent application Ser. AND MOTOR CONTROL CIRCUITS'.

The applicant of this application also owns the following identified U.S. patent applications filed on February 9, 2016, the entire contents of each of which are incorporated herein by reference: .
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 15/019,196, entitled "SURGICAL INSTRUMENT ARTICULATION MECHANISM WITH SLOTTED SECONDARY CONSTRAINT",
- U.S. patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 15/019,235, entitled "SURGICAL INSTRUMENTS WITH TENSIONING ARRANGEMENTS FOR CABLE DRIVEN ARTICULATION SYSTEMS",
- US patent application Ser. No. 15/019,230, entitled "ARTICULATABLE SURGICAL INSTRUMENTS WITH OFF-AXIS FIRING BEAM ARRANGEMENTS"; REDUCTION ARRANGEMENTS".

The applicant of this application also owns the following identified U.S. patent applications filed on February 12, 2016, the entire contents of each of which are incorporated herein by reference: .
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser. FAILURE IN POWERED SURGICAL INSTRUMENTS".

The applicant of the present application owns the following US patent applications filed June 18, 2015, each of which is hereby incorporated by reference in its entirety:
- US patent application Ser. No. 14/742,925, entitled "SURGICAL END EFFECTORS WITH POSITIVE JAW OPENING ARRANGEMENTS",
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 14/742,885, entitled "DUAL ARTICULATION DRIVE SYSTEM ARRANGEMENTS FOR ARTICULATABLE SURGICAL INSTRUMENTS"; FOR ARTICULATABLE SURGICAL INSTRUMENTS".

The applicant of this application owns the following US patent applications, filed March 6, 2015, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 14/640,799, entitled "SIGNAL AND POWER COMMUNICATION SYSTEM POSITIONED ON A ROTABLE SHAFT", now US Patent Application Publication No. 2016/0256162, and - US Patent Application No. 14/640, 780, entitled "SURGICAL INSTRUMENT COMPRISING A LOCKABLE BATTERY HOUSING," now U.S. Patent Application Publication No. 2016/0256161.

The applicant of this application owns the following US patent applications filed on February 27, 2015, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. SURGICAL APPARATUS CONFIGURED TO TRACK AN END-OF-LIFE PARAMETER”, now US Patent Application Publication No. 2016/0249917.

The applicant of the present application owns the following US patent applications filed December 18, 2014, the entire contents of each of which are incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser. ,
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 14/574,493, entitled "SURGICAL INSTRUMENT ASSEMBLY COMPRISING A FLEXIBLE ARTICULATION SYSTEM", now US Patent Application Publication No. 2016/0174970, and - US Patent Application No. 14/574,500 , entitled "SURGICAL INSTRUMENT ASSEMBLY COMPRISING A LOCKABLE ARTICULATION SYSTEM", now U.S. Patent Application Publication No. 2016/0174971.

The applicant of this application owns the following US patent applications, filed March 1, 2013, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 13/782,375, entitled "ROTARY POWERED SURGICAL INSTRUMENTS WITH MULTIPLE DEGREES OF FREEDOM", now US Patent No. 9,398,911, and - US Patent Application No. 13/782,536 No., entitled "SURGICAL INSTRUMENT SOFT STOP", now U.S. Pat. No. 9,307,986.

The applicant of the present application also owns the following US patent applications, filed March 14, 2013, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 13/803,130, entitled "DRIVE TRAIN CONTROL ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS", now US Patent No. 9,351,727, and - US Patent Application No. 13/803,159. , entitled "METHOD AND SYSTEM FOR OPERATING A SURGICAL INSTRUMENT", now U.S. Patent Application Publication No. 2014/0277017.

The applicant of the present application also owns the following US patent applications, filed March 7, 2014, each of which is hereby incorporated by reference in its entirety:
- US patent application Ser. No. 14/200,111, entitled "CONTROL SYSTEMS FOR SURGICAL INSTRUMENTS", now US patent application publication no.

The applicant of the present application also owns the following US patent applications, filed March 26, 2014, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 14/226,133, entitled "MODULAR SURGICAL INSTRUMENT SYSTEM", now US patent application publication no.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. "SURGICAL INSTRUMENT COMPRISING A ROTATABLE SHAFT," now U.S. Patent Application Publication No. 2015/0280384.

The applicant of this application also owns the following US patent applications filed on September 5, 2014, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 14/479,115, entitled "MULTIPLE MOTOR CONTROL FOR POWERED MEDICAL DEVICE", now US Patent Application Publication No. 2016/0066916, and - US Patent Application No. 14/479,108, Title of Invention "LOCAL DISPLAY OF TISSUE PARAMETER STABILIZATION", now U.S. Patent Application Publication No. 2016/0066913.

The applicant of this application also owns the following US patent applications filed on April 9, 2014, each of which is hereby incorporated by reference in its entirety:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
－米国特許出願第１４／２４８，５８４号、発明の名称「ＭＯＤＵＬＡＲ ＭＯＴＯＲ ＤＲＩＶＥＮ ＳＵＲＧＩＣＡＬ ＩＮＳＴＲＵＭＥＮＴＳ ＷＩＴＨ ＡＬＩＧＮＭＥＮＴ ＦＥＡＴＵＲＥＳ ＦＯＲ ＡＬＩＧＮＩＮＧ ＲＯＴＡＲＹ ＤＲＩＶＥ ＳＨＡＦＴＳ ＷＩＴＨ ＳＵＲＧＩＣＡＬ ＥＮＤ ＥＦＦＥＣＴＯＲ ＳＨＡＦＴＳ」、現在は米国特許出願公開第２０１４／０３０５９９４号、
- U.S. patent application Ser.
- US Patent Application No. 14/248,586, entitled "DRIVE SYSTEM DECOUPLING ARRANGEMENT FOR A SURGICAL INSTRUMENT", now US Patent Application Publication No. 2014/0305990, and - US Patent Application No. 14/248,607. , entitled "MODULAR MOTOR DRIVEN SURGICAL INSTRUMENTS WITH STATUS INDICATION ARRANGEMENTS", now U.S. Patent Application Publication No. 2014/0305992.

The applicant of this application also owns the following US patent applications filed on April 16, 2013, each of which is hereby incorporated by reference in its entirety:
- US Provisional Patent Application No. 61/812,365, entitled "SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A SINGLE MOTOR",
- US Provisional Patent Application No. 61/812,376, entitled "LINEAR CUTTER WITH POWER";
- US Provisional Patent Application No. 61/812,382, entitled "LINEAR CUTTER WITH MOTOR AND PISTOL GRIP",
- U.S. Provisional Application No. 61/812,385, entitled "SURGICAL INSTRUMENT HANDLE WITH MULTIPLE ACTUATION MOTORS AND MOTOR CONTROL," and - U.S. Provisional Application No. 61/812,372, entitled "SURGICAL INSTRUMENT WITH." MULTIPLE FUNCTIONS PERFORMED BY A SINGLE MOTOR".

Numerous specific details are set forth in the specification to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. Well-known operations, components and elements have not been described in detail so as not to obscure the embodiments described herein. The reader should be aware that the embodiments described and illustrated herein are non-limiting examples and, as such, that the specific structural and functional details disclosed herein may be representative and exemplary. , will understand. Variations and changes can be made thereto without departing from the scope of the claims.

The terms "comprise" (any form of comprise, such as "comprises" and "comprising"), "have" (any form of have, such as "has" and "having"), "comprise ( "include" (any form of include, such as "includes" and "including") and "contain" (any form of contain, such as "contains" and "containing") refer to open-ended linkages. is a verb. As a result, a surgical system, device, or instrument that “comprises,” “has,” “includes,” or “contains” one or more elements has one or more of those elements, but not one of them. You are not limited to having only one or more. Similarly, an element of a system, device, or apparatus that “comprises,” “has,” “includes,” or “contains” one or more features has those one or more features but does not include those one or more features. It is not limited to having only the above features.

The terms "proximal" and "distal" are used herein with respect to the clinician manipulating the handle portion of the surgical instrument. The term "proximal" refers to the portion closest to the clinician and the term "distal" refers to the portion located further from the clinician. It will be further appreciated that for convenience and clarity, spatial terms such as "vertical," "horizontal," "above," and "below" may be used herein with respect to the drawings. However, surgical instruments are used in many orientations and positions, and these terms are not intended to be limiting and/or absolute.

Various exemplary devices and methods are provided for performing laparoscopic and minimally invasive surgical procedures. However, the reader will readily appreciate that the various methods and devices disclosed herein can be used in many surgical procedures and applications, including, for example, those associated with open surgery. By reading the detailed description of this specification, the reader will understand that the various devices disclosed herein have been formed into tissue, e.g., through a natural orifice. It will further be appreciated that it may be inserted into the body in any manner, such as through an incision or puncture. The working or end effector portion of these instruments can be inserted directly into the patient's body, or access devices having working channels through which the end effector and elongated shaft of the surgical instrument can be advanced. can be inserted through

A surgical stapling system can include a shaft and an end effector extending from the shaft. The end effector includes a first jaw and a second jaw. The first jaw includes a staple cartridge. The staple cartridge is insertable into and removable from the first jaw, but the staple cartridge is not removable from, or at least readily replaceable from, the first jaw. Other embodiments are envisioned that are not. The second jaw includes an anvil configured to deform staples ejected from the staple cartridge. Other embodiments are envisioned in which the second jaw is pivotable relative to the first jaw about the closing axis, but the first jaw is pivotable relative to the second jaw. be done. The surgical stapling system further comprises an articulation joint configured to allow the end effector to rotate or articulate with respect to the shaft. The end effector is rotatable about an articulation axis that extends through the articulation joint. Other embodiments are envisioned that do not include an articulation joint.

The staple cartridge has a cartridge body. The cartridge body includes a proximal end, a distal end, and a deck extending between the proximal and distal ends. In use, the staple cartridge is positioned on a first side of the tissue to be stapled and the anvil is positioned on a second side of the tissue. The anvil is moved toward the staple cartridge to compress and clamp tissue against the deck. Staples removably stored within the cartridge body can then be deployed into tissue. The cartridge body includes staple cavities defined therein, and staples are removably stored within the staple cavities. The staple cavities are arranged in six longitudinal rows. Three rows of staple cavities are positioned on the first side of the longitudinal slot and three rows of staple cavities are positioned on the second side of the longitudinal slot. Other arrangements of staple cavities and staples may be possible.

The staples are supported by staple drivers within the cartridge body. The driver is movable between a first or unfired position and a second or fired position for firing staples from the staple cavities. The driver is retained within the cartridge body by a retainer extending around the bottom of the cartridge body and includes a resilient member configured to grip the cartridge body to hold the retainer against the cartridge body. include. The drivers are movable between their unfired and their fired positions by sleds. The sled is movable between a proximal position adjacent the proximal end and a distal position adjacent the distal end. The sled includes a plurality of ramps configured to slide under and lift the driver, and staples are supported thereon toward the anvil.

In addition to the above, the sled is moved distally by the firing member. A firing member is configured to contact the sled and push the sled toward the distal end. A longitudinal slot defined within the cartridge body is configured to receive the firing member. The anvil also includes a slot configured to receive the firing member. The firing member further comprises a first cam that engages the first jaw and a second cam that engages the second jaw. The first cam and the second cam can control the distance between the deck of the staple cartridge and the anvil, or the tissue gap, when advancing the firing member distally. The firing member also includes a knife configured to cut tissue captured intermediate the staple cartridge and the anvil. It is desirable that the knife be positioned at least partially proximal to the ramp so that the staples are ejected forward of the knife.

FIG. 1 shows a motorized surgical system 10 that can be used to perform a variety of different surgical procedures. As seen in this figure, one example of surgical system 10 includes four interchangeable surgical instrument assemblies 100 , 200 , 300 and 1000 each suitable for interchangeable use with handle assembly 500 . Each interchangeable surgical instrument assembly 100, 200, 300 and 1000 may be designed for use in connection with performing one or more specific surgical procedures. In another surgical system embodiment, the interchangeable surgical instrument assembly can be effectively used with the instrument drive assembly of a robotic or automated surgical system. For example, the surgical instrument assembly disclosed herein is disclosed in U.S. Pat. No. 9,072,535, entitled "SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE STAPLE DEPLOYMENTS", which is incorporated herein by reference in its entirety. ARRANGEMENTS”, including but not limited to, various robotic systems, instruments, components, and methods.

FIG. 2 illustrates one form of interchangeable surgical instrument assembly 100 operably coupled to handle assembly 500 . FIG. 3 shows the attachment of interchangeable surgical instrument assembly 100 to handle assembly 500 . The attachment configuration and process shown in FIG. 3 may also be used in connection with attaching any of the interchangeable surgical instrument assemblies 100, 200, 300 and 1000 to an instrument drive portion or instrument drive housing of a robotic system. be taken. Handle assembly 500 may comprise a handle housing 502 that includes a pistol gripping portion 504 that may be grasped and manipulated by a clinician. As discussed briefly below, handle assembly 500 produces various control movements to corresponding portions of interchangeable surgical instrument assemblies 100, 200, 300 and/or 1000 operably attached thereto. operably supporting a plurality of drive systems configured to apply a force;

Referring now to FIG. 3, the handle assembly 500 may further include a frame 506 that operably supports multiple drive systems. For example, frame 506 may operably support a “first” or closure drive system, generally indicated as 510 , which is operably attached or coupled to handle assembly 500 . 100, 200, 300 and 1000 to apply an opening and closing motion to the interchangeable surgical instrument assemblies 100, 200, 300 and 1000. In at least one form, closure drive system 510 may include an actuator in the form of closure trigger 512 pivotally supported by frame 506 . Such a configuration allows the clinician to manipulate the closure trigger 512 such that when the clinician grasps the pistol gripping portion 504 of the handle assembly 500, the closure trigger 512 is in the starting position or the It is readily pivotable from a "non-actuated" position to an "actuated" position, more specifically to a fully compressed or fully actuated position. In various forms, the closure drive system 510 further comprises a closure coupling assembly 514 pivotally coupled to the closure trigger 512 or otherwise operably interfaced thereto. As will be described in greater detail below, in the exemplary embodiment, closure coupling assembly 514 includes lateral mounting pins 516 to facilitate attachment to a corresponding drive system on a surgical instrument assembly. In use, the clinician depresses the closure trigger 512 toward the pistol grip portion 504 to activate the closure drive system. More details in U.S. patent application Ser. As described, when the clinician fully depresses the closure trigger 512 to achieve a full closure stroke, the closure drive system moves the closure trigger 512 to the fully depressed or fully actuated position. configured to lock with When the clinician desires to unlock the closure trigger 512 and bias it toward the non-actuated position, the clinician simply activates the closure release button assembly 518, thereby deactivating the closure trigger. It is possible to return to the position. Closure release button 518 may also be configured to interact with various sensors in communication with microcontroller 520 within handle assembly 500 to track the position of closure trigger 512 . Further details regarding the construction and operation of the closure release button assembly 518 may be found in US Patent Application Publication No. 2015/0272575.

In at least one form, handle assembly 500 and frame 506 are configured to apply a firing motion to a corresponding portion of an interchangeable surgical instrument assembly attached thereto. Another drive system may be operably supported, referred to as drive system 530 . As described in detail in U.S. Patent Application Publication No. 2015/0272575, firing drive system 530 may employ an electric motor (not shown in FIGS. 1-3) to drive the pistol gripping portion of handle assembly 500. Located at 504. In various forms, the motor may be, for example, a brushed DC drive motor having a maximum speed of about 25,000 RPM. In other configurations, the motor may include a brushless motor, cordless motor, synchronous motor, stepper motor, or any other suitable electric motor. The motor may be powered by power supply 522, which in one form may comprise a removable power pack. The power pack may support multiple lithium ion (“LI”) batteries or other suitable batteries therein. Multiple batteries that can be connected in series may be used as power source 522 for surgical system 10 . Note that the power source 522 may be replaceable and/or rechargeable.

The electric motor is configured to axially drive the longitudinally movable drive member 540 in distal and proximal directions, depending on the polarity of the motor. For example, when the motor drives in one rotational direction, longitudinally movable drive member 540 may drive axially in distal direction "DD". As the motor drives in the opposite rotational direction, drive member 540 may drive axially in the proximal direction “PD”. The handle assembly 500 may include a switch 513 that may be configured to reverse the polarity applied to the electric motor by the power source 522 or otherwise control the motor. Handle assembly 500 may further include a sensor (not shown) configured to detect the position of drive member 540 and/or the direction in which drive member 540 is moving. Motor actuation may be controlled by a firing trigger 532 (FIG. 1) pivotally supported on handle assembly 500 . Firing trigger 532 may pivot between an unactuated position and an actuated position. Firing trigger 532 may be biased to an unactuated position by a spring or other biasing arrangement such that when the clinician releases firing trigger 532, it is pushed into the unactuated position by the spring or biasing device. may be pivoted to or otherwise returned. In at least one form, the firing trigger 532 can be positioned "outside" the closing trigger 512, as described above. As described in U.S. Patent Application Publication No. 2015/0272575, handle assembly 500 may be equipped with a firing trigger safety button (not shown) to prevent accidental actuation of firing trigger 532. . When the closure trigger 512 is in the unactuated position, the safety button is housed within the handle assembly 500 such that the clinician cannot easily access the safety button and the safety button prevents activation of the firing trigger 532. It cannot be actuated between the position and the firing position where the firing trigger 532 can be fired. As the clinician depresses the closure trigger 512, the safety button and firing trigger 532 pivots downward and then becomes available for operation by the clinician.

In at least one form, the longitudinally moveable drive member 540 has teeth (see FIG. 2) formed thereon for meshing engagement with a corresponding drive gear arrangement (not shown) that interacts with the motor. (not shown). Further details regarding these mechanisms can be found in US Patent Application Publication No. 2015/0272575. Also, a manually actuated "emergency release" assembly configured to allow the clinician to manually retract the longitudinally movable drive member 540 in the event of motor failure. Included in at least one form. The emergency release assembly may include a lever or emergency release handle assembly stored within handle assembly 500 under releasable door 550 . The lever is configured to be manually pivoted into ratcheting engagement with the teeth of drive member 540 . Accordingly, the clinician can manually retract drive member 540 by ratcheting drive member 5400 proximally "PD" using the emergency disengagement handle assembly. U.S. patent application Ser. No. 12/249,117, entitled "POWERED SURGICAL CUTTING AND STAPLING APPARATUS WITH MANUALLY RETRACTABLE FIRRING SYSTEM," now U.S. Pat. No. 045 discloses other components, arrangements, and systems that may be used with emergency detachment configurations, as well as various surgical instrument assemblies disclosed herein.

Referring now to FIG. 2, interchangeable surgical instrument assembly 100 comprises a surgical end effector 110 comprising first and second jaws. In one configuration, first jaw includes elongated channel 112 configured to operably support surgical staple cartridge 116 therein. The second jaw includes an anvil 114 pivotally supported relative to elongated channel 112 . Interchangeable surgical instrument assembly 100 also includes a locking articulation joint 120 that can be configured to releasably retain end effector 110 in a desired position relative to shaft axis SA. Details regarding the various structures and operations of the end effector 110, the articulation joint 120 and the articulation lock are provided in U.S. patent application Ser. INSTRUMENT COMPRISING AN ARTICULATION LOCK”, now described in US Patent Application Publication No. 2014/0263541. As further seen in FIGS. 2 and 3, interchangeable surgical instrument assembly 100 includes a closure tube assembly that can be utilized to close and/or open proximal housing or nozzle 130 and anvil 114 of end effector 110 . A volume 140 may be included. As described in U.S. Patent Application Publication No. 2015/0272575, the closure tube assembly 140 moves over a spine 145 that supports an articulation driver arrangement 147 for applying articulation to the surgical end effector 110. supported as possible. Spine 145 is configured to (1) slidably support firing member 170 therein and (2) slidably support closure tube assembly 140 extending about spine 145 . . Under various circumstances, spine 145 includes a proximal end that is rotatably supported on chassis 150 . See FIG. In one configuration, for example, the proximal end of spine 145 is attached to a spine bearing (not shown) configured to be supported within chassis 150 . Such a configuration facilitates rotatable attachment of spine 145 to chassis 150 and may selectively rotate spine 145 relative to chassis 150 about shaft axis SA.

Still referring to FIG. 3, interchangeable surgical instrument assembly 100 includes closure shuttle 160 slidably supported therein so as to be axially moveable relative to chassis 150 . As seen in FIG. 3 , closure shuttle 160 includes a pair of proximally projecting hooks 162 that attach to mounting pins 516 attached to closure linkage assembly 514 of handle assembly 500 . configured to A proximal closure tube portion 146 of closure tube 140 is coupled to closure shuttle 160 for relative rotation thereto. Thus, when hook 162 hooks onto pin 516 , actuation of closure trigger 512 results in axial movement of closure shuttle 160 and ultimately closure tube assembly 140 on spine 145 . A closure spring (not shown) is journalled on closure tube 140 and serves to bias closure tube 140 in the proximal direction “PD”, thereby causing shaft assembly 100 to engage handle assembly 500 . When operably coupled, it can serve to pivot the closure trigger 512 to an unactuated position. In use, closure tube assembly 140 translates distally (direction “DD”) to close anvil 114 , eg, in response to actuation of closure trigger 512 . Closure tube assembly 140 includes distal closure tube section 142 pivotally pinned to the distal end of proximal closure tube section 146 . Distal obturator tube portion 142 is configured to move axially with proximal obturator tube portion 146 relative to surgical end effector 110 . When the distal end of distal obturator tube segment 142 impacts the proximal surface or ledge 115 on anvil 114, anvil 114 is pivoted closed. Further details regarding closing the anvil 114 can be found in the aforementioned US Patent Application Publication No. 2014/0263541 and are discussed in further detail below. The anvil 114 is opened by proximally translating the distal obturator tube portion 142, as described in detail in US Patent Application Publication No. 2014/0263541. Distal closure tube portion 142 has a downwardly extending return tab (Fig. (not shown). In the fully open position, the closure tube assembly 140 is in its proximal-most or non-actuated position.

As also mentioned above, interchangeable surgical instrument 100 further includes firing bar 170 supported for axial movement within shaft spine 145 . Firing bar 170 includes an intermediate firing shaft portion configured to attach to a distal cutting portion or knife bar configured to move axially through surgical end effector 110 . In at least one configuration, interchangeable surgical instrument assembly 100 includes a clutch assembly (not shown) that may be configured to selectively and releasably couple an articulation driver to firing bar 170 . Further details regarding clutch assembly mechanics and operation can be found in US Patent Application Publication No. 2014/0263541. As described in U.S. Patent Application Publication No. 2014/0263541, distal movement of firing bar 170 causes articulation driver arrangement 147 to move distally when the clutch assembly is in its engaged position. , and correspondingly, proximal movement of firing bar 170 can cause articulation driver mechanism 147 to move proximally. When the clutch assembly is in its disengaged position, movement of the firing bar 170 is not transmitted to the articulation drive 147 so that the firing bar 170 can move independently of the articulation drive 147. can. Interchangeable surgical instrument assembly 100 can also include a slip ring assembly (not shown) that conducts power to and/or from end effector 110, and /or may be configured to communicate signals to and/or from the end effector 110 . Further details regarding the slip ring assembly can be found in US Patent Application Publication No. 2014/0263541. U.S. Patent Application No. 13/800,067, entitled "STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM," now U.S. Patent Application Publication No. 2014/0263552, is hereby incorporated by reference in its entirety. US Pat. No. 9,345,481, entitled "STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM," is incorporated herein by reference in its entirety.

Still referring to FIG. 3, chassis 150 includes at least one, preferably at least one, dovetail slot 507 formed on the chassis adapted to be received within a corresponding dovetail slot 507 formed in the distal end of frame 506 . includes two tapered attachment portions 152 . Each dovetail slot 507 may be tapered, or in other words somewhat V-shaped, to seatably receive the mounting portion 152 therein. As further seen in FIG. 3, shaft mounting lugs 172 are formed on the proximal end of firing shaft 170 . When interchangeable surgical instrument assembly 100 is coupled to handle assembly 500 , shaft mounting lug 172 is located at firing shaft mounting cradle 542 formed at the distal end of longitudinally movable drive member 540 . accepted by Interchangeable surgical instrument assembly 100 also employs latch system 180 to releasably latch shaft assembly 100 to frame 506 of handle assembly 500 . In at least one form, for example, latch system 180 includes a locking member or locking yoke 182 movably coupled to chassis 150 . Locking yoke 182 includes two proximally projecting locking lugs 184 configured to releasably engage corresponding locking detents or grooves 509 in the distal mounting flange of frame 506 . In various forms, locking yoke 182 is biased proximally by a spring or biasing member. Actuation of lock yoke 182 may be accomplished by a latch button 186 slidably mounted on a latch actuator assembly mounted on chassis 150 . Latch button 186 may be biased proximally against locking yoke 182 . As will be described in more detail below, locking yoke 182 may be moved to the unlocked position by distally biasing latch button 186, which causes locking yoke 182 to pivot. , out of retaining engagement with the distal mounting flange of frame 506 . When locking yoke 182 is in “retaining engagement” with the distal mounting flange of frame 506 , locking lugs 184 seat retained within corresponding locking detents or grooves 509 in the distal end of frame 506 . Further details regarding the latch system can be found in US Patent Application Publication No. 2014/0263541.

Attachment of interchangeable surgical instrument assembly 100 to handle assembly 500 will now be described with respect to FIG. To begin the coupling process, the clinician assembles chassis 150 of interchangeable surgical instrument assembly 100 such that tapered mounting portion 152 formed on chassis 150 is aligned with dovetail slot 507 of frame 506 . may be positioned above or adjacent to the distal end of frame 506 . The clinician then moves surgical instrument assembly 100 along installation axis IA perpendicular to shaft axis SA to align tapered mounting portion 152 with a corresponding dovetail receiving slot in the distal end of frame 506. 507 may be "operably engaged" and seated. In doing so, the shaft mounting lug 172 on the firing shaft 170 also seats in a cradle 542 on the longitudinally movable drive member 540 and a portion of the pin 516 on the closure link 514 engages a corresponding hook on the closure shuttle 160. Seated at 162. As used herein, the term "operable engagement" in the context of two components means that the two components are fully engaged with each other such that when an actuation motion is applied to them, the configuration It means that the element can perform the intended action, function and/or procedure.

Referring now to FIG. 1, the surgical system 10 shown therein includes four interchangeable surgical instrument assemblies 100, 200, 300 and 1000, each effectively working with the same handle assembly 500. can be used to perform different surgical procedures. A representative form of construction of interchangeable surgical instrument assembly 100 is described briefly above and in more detail in US Patent Application Publication No. 2014/0263541. Various details regarding interchangeable surgical instrument assemblies 200 and 300 may be found in various US patent applications filed on even date herewith and incorporated herein by reference. Various details regarding interchangeable surgical instrument assembly 1000 are described in greater detail below.

As shown in FIG. 1, each of surgical instrument assemblies 100, 200, 300, and 1000 includes a pair of jaws, at least one of the jaws having tissue closed with the two jaws. It is moveable between an open position in which it can be captured or manipulated between positions, and a closed position in which tissue is securely held therebetween. The movable jaws or jaws are in a released position upon application of closing and opening movements applied thereto from a robot or automated surgical system to which the handle assembly or surgical instrument assembly is operably coupled. and closed positions. It should be noted that each of the illustrated interchangeable surgical instrument assemblies cuts tissue and causes one of the jaws to sever in response to a firing motion applied thereto by the handle assembly or robotic system. A firing member configured to fire staples from the supported cartridge is provided. Each surgical instrument assembly may be uniquely designed, for example, to perform a specific procedure for cutting and fastening tissue types and thicknesses within a particular region of the body. The closing, firing, and articulation control system in the handle assembly 500 or robotic system provides axial control motion and/or rotation, depending on the type of closing, firing, and articulation system configuration used in the surgical instrument assembly. It may be configured to generate a controlled motion. In one configuration, when the closure control system in the handle assembly or robotic system is fully actuated, one of the closure system control components may comprise, for example, the closure tube assembly described above, and is actuated from the non-actuated position. It can move axially to its fully actuated position. The axial distance a closure tube assembly travels between its non-actuated position and its fully actuated position may be referred to herein as the "closure stroke length." Similarly, when the handle assembly or the firing system in the robotic system is fully actuated, one of the firing system control components may comprise, for example, the longitudinally movable drive member described above, and is in a non-actuated position. to its fully actuated or fired position. The axial distance traveled by the longitudinally movable drive member between its inoperative position and its fully fired position may be referred to herein as the "firing stroke length." For those surgical instrument assemblies that employ an articulatable end effector configuration, the handle assembly or robotic system employs an articulation control component that moves axially via an "articulation drive stroke length." you can In many situations, the closing stroke length, firing stroke length, and articulation drive stroke length are fixed for a particular handle assembly or robotic system. Accordingly, each of the surgical instrument assemblies can be driven through their respective stroke lengths without placing undue stress on the surgical instrument components that could result in damage or catastrophic failure of the surgical instrument assembly. It must be adaptable for controlled movement of the closing, firing, and/or articulating components over time.

4-10, an interchangeable surgical instrument assembly 1000 includes a surgical end effector 1100 having an elongated channel 1102 configured to operably support a staple cartridge 1110 therein. Prepare. End effector 1100 may further comprise an anvil 1130 pivotally supported relative to elongated channel 1102 . Interchangeable surgical instrument assembly 1000 can be configured to releasably retain end effector 1100 in a desired articulated position with respect to shaft axis SA, including articulation joint 1200 and articulation lock 1210 (see FIG. 5 and FIGS. 8-10). Details regarding the construction and operation of articulation lock 1210 are provided in U.S. patent application Ser. It can now be found in US Patent Application Publication No. 2014/0263541. Further details regarding articulation locks are also provided in U.S. patent application Ser. ARTICULATION MECHANISM WITH SLOTTED SECONDARY CONSTRAINT. As seen in FIG. 7, interchangeable surgical instrument assembly 1000 includes a proximal housing or nozzle 1300 comprised of nozzle portions 1302, 1304 and nozzle portion 1302, assembled by snaps, lugs, screws, or the like. An actuator wheel portion 1306 configured to couple to 1304 can also be included. As will be described in greater detail below, interchangeable surgical instrument assembly 1000 further comprises a closure tube assembly 1400 that can be utilized to close and/or open anvil 1130 of end effector 1100. can be done. Referring primarily to FIGS. 8 and 9 , interchangeable surgical instrument assembly 1000 can include spine assembly 1500 that can be configured to support articulation lock 1210 . In the illustrated configuration, spine assembly 1500 comprises a "elastic" spine or frame member 1510, which is described in greater detail below. Distal end 1522 of resilient spine member 1510 is attached to a distal frame portion 1560 that operably supports articulation lock 1210 therein. 7 and 8, the spine assembly 1500 (1) slidably supports the firing member assembly 1600 therein and (2) a closure extending around the spine assembly 1500. It is configured to slidably support tube assembly 1400 . Spine assembly 1500 can also be configured to slidably support proximal joint driver 1700 .

As seen in FIG. 10, distal frame section 1560 is pivotally coupled to elongated channel 1102 by end effector mounting assembly 1230 . In one configuration, for example, distal end 1562 of distal frame section 1560 has a pivot pin 1564 formed thereon. Pivot pin 1564 is adapted to be pivotally received within pivot hole 1234 formed in pivot base 1232 of end effector mounting assembly 1230 . End effector mounting assembly 1230 is attached to proximal end 1103 of elongated channel 1102 by spring pin 1105 or other suitable member. Pivot pin 1564 defines an articulation axis BB transverse to shaft axis SA. Please refer to FIG. Such a configuration facilitates pivotal movement (ie, articulation) of end effector 1100 about articulation axis BB relative to spine assembly 1500 .

Still referring to FIG. 10 , in the illustrated embodiment, articulation driver 1700 has a distal end 1702 configured to operably engage articulation lock 1210 . Articulation lock 1210 comprises an articulation frame 1212 adapted to operably engage drive pin 1238 on pivot base 1232 of end effector mounting assembly 1230 . Note that the cross link 1237 may be coupled to the drive pin 1238 and the articulation frame 1212 to assist in articulating the end effector 1100 . As noted above, further details regarding the operation of articulation lock 1210 and articulation frame 1212 may be found in US Patent Application No. 13/803,086, now US Patent Application Publication No. 2014/0263541. Further details regarding end effector mounting assemblies and cross-links are provided in U.S. patent application Ser. (filed February 9, 2016). In various situations, resilient spine member 1510 includes a proximal end 1514 rotatably supported on chassis 1800 . In one configuration, for example, proximal end 1514 of resilient spine member 1510 is formed thereon for threaded attachment to a spine bearing (not shown) configured to be supported within chassis 1800. , with screws 1516 . Such a configuration facilitates rotatable attachment of resilient spine member 1510 to chassis 1800 such that spine assembly 1500 may be selectively rotated relative to chassis 1800 about shaft axis SA.

Referring primarily to FIG. 7, interchangeable surgical instrument assembly 1000 includes closure shuttle 1420 slidably supported within chassis 1800 so that it can be moved axially relative to chassis 1800 . In one form, closure shuttle 1420 includes a pair of proximally projecting hooks 1421 that attach to attachment pins 516 attached to closure linkage assembly 514 of handle assembly 500, as described above. configured to be installed. A proximal end 1412 of closure tube portion 1410 is coupled to closure shuttle 1420 for relative rotation therewith. For example, U-shaped connector 1424 is inserted into annular slot 1414 in proximal end 1412 of closure tube portion 1410 and retained within vertical slot 1422 in closure shuttle 1420 . See FIG. Such a configuration allows proximal closure tube assembly 1400 to rotate relative to closure shuttle 1420 about shaft axis SA, while allowing proximal closure tube section 1410 to move axially therewith. Helps attach to closure shuttle 1420 . A closure spring (not shown) is journalled on the proximal end 1412 of the proximal closure tube portion 1410 and serves to bias the closure tube assembly 1400 in the proximal direction PD, thereby: When interchangeable surgical instrument assembly 1000 is operably coupled to handle assembly 500, it serves to pivot closure trigger 512 (FIG. 3) on handle assembly 500 to an unactuated position.

As described above, the illustrated interchangeable surgical instrument assembly 1000 includes an articulation joint 1200. As shown in FIG. However, other compatible surgical instrument assemblies may not be articulatable. As seen in FIG. 10 , upper and lower projections 1415 , 1416 project distally from the distal end of proximal closure tube portion 1410 to provide an end effector closure sleeve or distal end of closure tube assembly 1400 . It is movably connected to closure tube section 1430 . As seen in FIG. 10, distal obturator section 1430 includes upper and lower projections 1434, 1436 projecting proximally from its proximal end. The upper dual pivot link 1220 comprises proximal and distal pins that engage corresponding holes in the upper projections 1415 , 1434 of the proximal closure tube portion 1410 and the distal closure tube section 1430 . Similarly, lower dual pivot link 1222 includes proximal and distal pins that engage corresponding holes in lower projections 1416 and 1436 of proximal closure tube portion 1410 and distal closure tube section 1430 . Distal and proximal axial translation of closure tube assembly 1400 may effect closure and opening of anvil 1130 relative to elongated channel 1102, as described in greater detail below.

As previously mentioned, interchangeable surgical instrument assembly 1000 further includes firing member assembly 1600 supported for axial movement within spine assembly 1500 . In the illustrated embodiment, firing member assembly 1600 includes an intermediate firing shaft portion 1602 configured for attachment to a distal cutting portion or knife bar 1610 . Firing member assembly 1600 may also be referred to herein as a "second shaft" and/or a "second shaft assembly." As seen in FIGS. 7-10, intermediate firing shaft portion 1602 may include a longitudinal slot 1604 at its distal end that accommodates a tab (not shown) on the proximal end of knife bar 1610. can be configured to accept The longitudinal slot 1604 and the proximal end of the knife bar 1610 can be sized and configured to allow relative movement therebetween and can include a slip joint 1612 . Slip joint 1612 allows intermediate firing shaft portion 1602 of firing member assembly 1600 to move to articulate end effector 1100 without moving knife bar 1610, or at least substantially without moving. can do. Once end effector 1100 is suitably oriented, intermediate firing shaft portion 1602 is advanced distally to advance knife bar 1610 until the proximal sidewalls of longitudinal slot 1604 contact the projections on knife bar 1610; and a staple cartridge 1110 located within channel 1102 can be fired. 8 and 9, the resilient spine member 1520 has elongated openings or windows to facilitate assembly and insertion into the resilient spine member 1520 of the intermediate firing shaft portion 1602. 1525. Once intermediate firing shaft portion 1602 is inserted therein, top frame portion 1527 may engage resilient spine member 1520 to enclose intermediate firing shaft portion 1602 and knife bar 1610 therein. Further description regarding the operation of firing member assembly 1600 may be found in US Patent Application No. 13/803,086, now US Patent Application Publication No. 2014/0263541.

In addition to the above, interchangeable instrument assembly 1000 can also include a clutch assembly 1620 that can be configured to selectively and releasably couple articulation driver 1800 to firing member assembly 1600. can. In one form, the clutch assembly 1620 includes a locking collar or sleeve 1622 positioned about the firing member assembly 1600 , the locking sleeve 1622 connecting the articulation driver 1700 to the firing member assembly 1600 . and a disengaged position in which articulation driver 1700 is not operably coupled to firing member assembly 1600. When locking sleeve 1622 is in its engaged position, distal movement of firing member assembly 1600 can cause articulation driver 1700 to move distally, which correspondingly causes firing member assembly 1600 to move distally. Proximal movement of can cause articulation driver 1700 to move proximally. When locking sleeve 1622 is in its disengaged position, movement of firing member assembly 1600 is not transmitted to articulation driver 1700 such that firing member assembly 1600 is independent of articulation driver 1700. can be moved by In various situations, the articulation lock 1210 holds the articulation driver 1700 in place when the articulation driver 1700 is not being moved proximally or distally by the firing member assembly 1600. can be done.

Referring primarily to FIG. 7, locking sleeve 1622 has a cylindrical, or at least substantially cylindrical, longitudinal opening 1624 defined therein that is configured to receive firing member assembly 1600. can have a body of The locking sleeve 1622 can include diametrically opposed inwardly directed locking projections 1626 , 1628 and an outwardly directed locking member 1629 . Locking projections 1626 , 1628 may be configured to selectively engage intermediate firing shaft portion 1602 of firing member assembly 1600 . More specifically, when locking sleeve 1622 is in its engaged position, locking projections 1626, 1628 are disposed within drive notches 1605 defined in intermediate firing shaft portion 1602, thereby allowing distal A pushing force and/or a proximal pulling force can be transmitted from firing member assembly 1600 to locking sleeve 1622 . When locking sleeve 1622 is in its engaged position, second locking member 1629 is received within drive notch 1704 defined in articulation driver 1700 , thereby applying distal force to locking sleeve 1622 . A pushing force and/or a proximal pulling force can be transmitted to the articulation driver 1700 . Substantially, firing member assembly 1600, locking sleeve 1622, and articulation driver 1700 may move together when locking sleeve 1622 is in its engaged position. On the other hand, when locking sleeve 1622 is in its disengaged position, locking projections 1626, 1628 cannot be positioned within drive notch 1605 of intermediate firing shaft portion 1602 of firing member assembly 1600, resulting in a far A pushing force in the proximal direction and/or a pulling force in the proximal direction cannot be transferred from the firing member assembly 1600 to the locking sleeve 1622 . Correspondingly, distal pushing forces and/or proximal pulling forces may not be transmitted to articulation driver 1700 . Under such circumstances, firing member assembly 1600 may be slid proximally and/or distally relative to locking sleeve 1622 and proximal articulation driver 1700 . Clutch assembly 1620 further includes a switch drum 1630 that interacts with lock sleeve 1622 . Further description regarding the operation of the switch drum and lock sleeve 1622 can be found in U.S. Patent Application No. 13/803,086, now U.S. Patent Application Publication No. 2014/0263541, and U.S. Patent Application No. 15/019,196. can be issued. The switch drum 1630 can further include at least partially circumferential openings 1632, 1634 defined therein, which openings extend from the nozzle halves 1302, 1304 and extend from the nozzle halves 1302, 1304. It receives mounting seat 1305 and allows relative rotation, but not translation, between switch drum 1630 and proximal nozzle 1300 . See FIG. Rotating nozzle 1300 to the point where the mounting seats reach the ends of respective slots 1632, 1634 in switch drum 1630 may cause switch drum 1630 to rotate about shaft axis SA. Rotation of switch drum 1630 may eventually cause locking sleeve 1622 to rotate between its engaged and disengaged positions. Thus, in essence, the nozzle 1300 is constructed in accordance with U.S. Patent Application No. 13/803,086, now U.S. Patent Application Publication No. 2014/0263541, and U.S. Patent Application No. 2014/0263541, each of which is incorporated herein by reference in its entirety. It may be used to operably engage and disengage the articulation drive system and the firing drive system in various manners, which are described in more detail in application Ser. No. 15/019,196.

In the illustrated configuration, switch drum 1630 includes an L-shaped slot 1636 that extends to a distal opening 1637 of switch drum 1630 . Distal opening 1637 receives lateral pin 1639 of shifter plate 1638 . In one example, the shifter plate 1638 is received within a longitudinal slot (not shown) provided in the locking sleeve 1622 such that when the locking sleeve 1622 is engaged with the articulation driver 1700, the locking sleeve 1622 shifts. to facilitate axial movement of the Further details regarding the operation of the shifter plate and shift drum arrangement are provided in U.S. patent application Ser. FIRING AND POWERED ARTICUALTION” (filed September 28, 2015).

As also shown in FIGS. 7 and 8, the interchangeable instrument assembly 1000 may, for example, conduct power to and/or communicate signals with the end effector 1100 to handle the handle. A slip ring assembly 1640 can be included that can be configured back to the microprocessor in the assembly or robot system controller. Further details regarding the slip ring assembly 1640 and associated connectors can be found in U.S. Patent Application No. 13/803,086, now U.S. Patent Application Publication No. 2014/0263541, each of which is incorporated herein by reference in its entirety. and U.S. patent application Ser. It can now be found in US Patent Application Publication No. 2014/0263552. Interchangeable surgical instrument assembly 1000 also includes at least one switch drum 1630 configured to detect the position of switch drum 1630, as described in more detail in the aforementioned patent application, which is incorporated herein by reference. A sensor can be provided.

Referring again to FIG. 7, the chassis 1800 is adapted to be received within corresponding dovetail slots 507 formed in the distal end of the frame 506 of the handle assembly 500, as described above. At least one, preferably two tapered attachment portions 1802 formed in the . As further seen in FIG. 7, shaft mounting lugs 1605 are formed on the proximal end of intermediate firing shaft 1602 . As will be described in greater detail below, when interchangeable surgical instrument assembly 1000 is coupled to handle assembly 500, shaft mounting lugs 1605 are formed on the distal end of longitudinal drive member 540. It is received in shaft mounting cradle 542 . See FIG.

Various interchangeable surgical instrument assemblies employ latch system 1810 to removably couple interchangeable surgical instrument assembly 1000 to frame 506 of handle assembly 500 . As seen in FIG. 7, for example, in at least one form latch system 1810 includes a locking member or locking yoke 1812 movably coupled to chassis 1800 . In the illustrated embodiment, for example, locking yoke 1812 has a U-shape with two spaced downwardly extending legs 1814 . Legs 1814 each have pivot lugs (not shown) adapted to be received in corresponding holes 1816 formed in chassis 1800 . Such a configuration facilitates pivotal attachment of lock yoke 1812 to chassis 1800 . Locking yoke 1812 has two proximally projecting locking lugs 1818 configured to releasably engage corresponding locking detents or grooves 509 in the distal end of frame 506 of handle assembly 500 . Be prepared. See FIG. In various forms, locking yoke 1812 is biased proximally by a spring or biasing member 1819 . Actuation of lock yoke 1812 may be accomplished by latch button 1820 slidably mounted on latch actuator assembly 1822 mounted on chassis 1800 . Latch button 1820 may be biased proximally against locking yoke 1812 . Lock yoke 1812 may be moved to an unlocked position by distally biasing latch button 1820 , which pivots lock yoke 1812 into engagement with the distal end of frame 506 . Disengage from retaining engagement. When locking yoke 1812 is in “retaining engagement” with the distal end of frame 506 , locking lugs 1818 seat retained within corresponding locking detents or grooves 509 in the distal end of frame 506 .

In the illustrated configuration, locking yoke 1812 includes at least one and preferably two locking hooks 1824 adapted to contact corresponding locking lug portions 1426 formed on closure shuttle 1420 . When closure shuttle 1420 is in the unactuated position, locking yoke 1812 can be pivoted distally to unlock compatible surgical instrument assembly 1000 from handle assembly 500 . When in that position, locking hook 1824 does not contact locking lug portion 1426 on closure shuttle 1420 . However, when the closure shuttle 1420 moves to the actuated position, the locking yoke 1812 is prevented from pivoting to the unlocked position. In other words, if the clinician were to attempt to pivot the locking yoke 1812 to the unlocked position, or, for example, the locking yoke 1812 would otherwise pivot distally, it would be displaced. If accidentally bumped or contacted, locking hooks 1824 on locking yoke 1812 contact locking lugs 1426 on closure shuttle 1420 and prevent locking yoke 1812 from moving to the unlocked position.

Still referring to FIG. 10, knife bar 1610 may comprise a laminated beam structure including at least two beam layers. Such beam layers may comprise, for example, stainless steel bands interconnected by welding or pinning together at their proximal ends and/or elsewhere along their length. . In an alternative embodiment, the distal ends of the bands are not coupled together to allow the laminations or bands to spread relative to each other when the end effector articulates. Such a configuration allows the knife bar 1610 to be flexible enough to accommodate articulation of the end effector. Various laminated knife bar configurations are disclosed in US patent application Ser. No. 15/019,245. As seen in FIG. 10, central support member 1614 is used to provide lateral support to knife bar 1610 as central support member 1614 flexes to accommodate articulation of surgical end effector 1100 . . Further details regarding intermediate support members and alternative knife bar support configurations are disclosed in US patent application Ser. No. 15/019,245. As seen in FIG. 10, a firing member or knife member 1620 is attached to the distal end of knife bar 1610 .

FIG. 11 shows one form of firing member 1660 that may be used with interchangeable instrument assembly 1000. FIG. In one exemplary form, firing member 1660 includes a proximally extending connector member 1663 configured to be received in a correspondingly shaped connector opening 1614 at the distal end of knife bar 1610. , with a body portion 1662 . See FIG. Connector 1663 may be retained within connector opening 1614 by frictional forces and/or welding, suitable adhesives, or the like. Body portion 1662 projects through elongate slot 1104 within elongate channel 1102 and terminates in a laterally extending leg member 1664 on each side of body portion 1662 . As firing member 1660 is driven distally through surgical staple cartridge 1110 , foot member 1664 rides within passageway 1105 in elongated channel 1102 located below surgical staple cartridge 1110 . As seen in FIG. 11, one form of firing member 1660 may further comprise a laterally projecting central tab, pin, or retainer mechanism 1680 . As firing member 1660 is driven distally through surgical staple cartridge 1110 , central retainer mechanism 1680 rides on inner surface 1106 of elongated channel 1102 . Body portion 1662 of firing member 1660 further includes a tissue cutting edge or feature 1666 disposed between distally projecting hook feature 1665 and distally projecting upper nose portion 1670 . As further seen in FIG. 11, firing member 1660 may further include two laterally extending upper tabs, pins, or anvil engagement features 1665 . As firing member 1660 is driven distally, the upper portion of body 1662 extends through centrally disposed anvil slot 1138 and upper anvil engagement features 1672 engage on each side of anvil slot 1134. It rides on the corresponding ledge 1136 that has been formed. See FIGS. 13 and 14. FIG.

Returning to FIG. 10, firing member 1660 is configured to operably interface with sled assembly 1120 operably supported within body 1111 of surgical staple cartridge 1110 . Sled assembly 1120 is slidable within surgical staple cartridge body 1111 from a proximal starting position adjacent proximal end 1112 of cartridge body 1111 to an ending position adjacent distal end 1113 of cartridge body 1111 . can be displaced to Cartridge body 1111 operably supports therein a plurality of staple drivers (not shown) aligned in rows on each side of centrally located slot 1114 . A centrally located slot 1114 allows firing member 1660 to pass therethrough to cut tissue clamped between anvil 1130 and staple cartridge 1110 . The drivers are associated with corresponding pockets 1116 that open through the upper deck surface 1115 of the cartridge body. Each staple driver supports one or more surgical staples or fasteners (not shown). Sled assembly 1120 includes a plurality of angled or wedge-shaped cams 1122 , each cam 1122 corresponding to a particular line of fasteners or drivers located on the sides of slot 1114 . In the illustrated embodiment, one cam 1122 is aligned with one line of "dual" drivers that each support two staples or fasteners thereon, and another cam 1122 is aligned with slot 1114. Aligned with another line of "single" drivers on the same side, each operably supporting a single surgical staple or fastener thereon. Thus, in the illustrated example, when surgical staple cartridge 1110 is "fired," there may be three staple lines on each lateral side of the tissue cut line. However, other cartridge and driver configurations can be used to fire other staple/fastener arrangements. Sled assembly 1120 has a central body portion 1124 configured to be engaged by hook portion 1665 of firing member 1660 . Thus, when firing member 1660 is fired or driven distally, firing member 1660 drives sled assembly 1120 distally. As firing member 1660 moves distally through cartridge 1110, tissue cutting mechanism 1666 cuts tissue clamped between anvil assembly 1130 and cartridge 1110, and sled assembly 1120 is driven An instrument is driven upward in the cartridge, which drives the corresponding staples or fasteners to make contact with the anvil assembly 1130 .

In embodiments in which the firing member includes a tissue cutting surface, it prevents accidental advancement of the firing member unless an unused staple cartridge is properly supported within elongated channel 1102 of surgical end effector 1100. It may be desirable to construct the elongated shaft assembly in such a manner. For example, if no staple cartridge is present and the firing member is advanced distally through the end effector, tissue will be cut but not stapled. Similarly, if a spent staple cartridge (i.e., a staple cartridge with at least some of the staples already fired) is present in the end effector and the firing member is advanced, the tissue will be severed, but Stapling may, if at all, be imperfect. It will be appreciated that the occurrence of such phenomena can result in undesirable eruptions during surgical procedures.米国特許第６，９８８，６４９号、発明の名称「ＳＵＲＧＩＣＡＬ ＳＴＡＰＬＩＮＧ ＩＮＳＴＲＵＭＥＮＴ ＨＡＶＩＮＧ Ａ ＳＰＥＮＴ ＣＡＲＴＲＩＤＧＥ ＬＯＣＫＯＵＴ」、同第７，０４４，３５２号、発明の名称「ＳＵＲＧＩＣＡＬ ＳＴＡＰＬＩＮＧ ＩＮＳＴＲＵＭＥＮＴ ＨＡＶＩＮＧ Ａ ＳＩＮＧＬＥ ＬＯＣＫＯＵＴ ＭＥＣＨＡＮＩＳＭ ＦＯＲ ＰＲＥＶＥＮＴＩＯＮ ＯＦ ＦＩＲＩＮＧ」 , and No. 7,380,695, entitled "SURGICAL STAPLING INSTRUMENT HAVING A SINGLE LOCKOUT MECHANISM FOR PREVENTION OF FIRING," and U.S. patent application Ser. ARRANGEMENTS FOR PREVENTING FIRING SYSTEM ACTUATION WHEN A CARTRIDGE IS SPENT OR MISSING each disclose a variety of firing member lockout configurations. Each of these references is incorporated herein by reference in its entirety.

An "unfired," "unused," "new" or "new" cartridge 1110, as used herein, means that the cartridge 1110 has all of its fasteners in their ready-to-fire position. When in that position, sled assembly 1120 is in its starting position. A new cartridge 1110 seats within the elongated channel 1102 and may be retained therein by a snap mechanism on the cartridge body configured for retaining engagement with corresponding portions of the elongated channel 1102 . 15 and 18 show a portion of surgical end effector 1100 with new or unfired surgical staples 1110 seated therein. As seen in these figures, sled assembly 1120 is in the starting position. To prevent the firing system from actuating unless an unfired or fresh surgical staple cartridge is properly seated within elongated channel 1102, more precisely, firing member 1660 is pushed distally through end effector 1110. To prevent directional driving, the illustrated interchangeable surgical instrument assembly 1000 employs a firing member lockout system generally designated as 1650 .

10 and 15-19, in one form, firing member lockout system 1650 locks firing member 1660 and firing member 1660 together when surgical staple cartridge 1110 is not properly seated within elongated channel 1102. A movable locking member 1652 is provided that is configured for retaining engagement. Locking member 1652 includes at least one laterally moving lock configured to retainably engage a corresponding portion of the firing member when sled assembly 1120 is not within cartridge 1110 in its starting position. A portion 1654 is provided. In the illustrated configuration, locking member 1652 employs two laterally moving locking portions 1654 , each locking portion 1654 engaging a laterally extending portion of firing member 1660 .

In the illustrated embodiment, the locking member 1652 comprises a generally U-shaped spring member with each laterally movable leg or locking portion 1654 extending from a central spring portion 1653 and extending from a central spring portion 1653 and shown in FIGS. is configured to move in the lateral direction represented by the "L" of . It will be understood that the term "lateral" means a direction transverse to the shaft axis SA. Spring or locking member 1652 may be made from high strength spring steel or similar material. Central spring portion 1653 may seat within slot 1236 in end effector mounting assembly 1230 . See FIG. As seen in FIGS. 15-17, each laterally movable leg or locking portion 1654 has a distal end 1656 with a locking window 1658 therein. When locking member 1652 is in the locked position, a central retention feature 1680 on each outer portion extends into a corresponding locking window 1658 to retain axial advancement of the firing member in the distal direction. to prevent.

Operation of the firing member lockout system is described with respect to FIGS. 15-19. 15 and 18 show a portion of surgical end effector 1100 with a new, unfired cartridge 1110 properly installed therein. As seen in these figures, sled assembly 1120 includes unlocking mechanisms 1126 corresponding to each of laterally movable locking portions 1654 . In the illustrated configuration, an unlocking mechanism 1126 is provided on or extends proximally from each of the central wedge-shaped cams 1122 . In an alternative configuration, unlocking mechanism 1126 may comprise a proximally projecting portion of corresponding wedge-shaped cam 1122 . As seen in FIG. 18, when sled assembly 1120 is in its starting position, unlocking mechanism 1124 engages the corresponding locking portion 1654 and disengages the corresponding locking portion in a direction transverse to shaft axis SA. bias 1654 laterally; When locking portions 1654 are in their unlocked orientations, central retention features 1680 are not in retaining engagement with their corresponding locking windows 1658 . In these orientations, firing member 1660 may be axially advanced (fired) distally. However, if no cartridge is present in elongated channel 1102, or if the sled assembly is displaced from its starting position (meaning that the cartridge is partially or fully fired), locking portion 1654 is laterally disengaged. It is spring loaded to retain engagement with firing member 1660 . When in its position as shown in FIG. 19, firing member 1660 cannot move distally.

16 and 17 show the retraction of firing member 1660 to the starting position after firing cartridge 1110 and driving sled assembly 1120 distally. FIG. 16 shows the initial reengagement of retention features 1680 with corresponding locking windows 1658 . FIG. 17 shows the retention mechanism in the locked position with firing member 1660 fully retracted to its starting position. To assist lateral displacement of locking portions 1654 when locking portions 1654 are each initially contacted by retaining features 1680 moving proximally, each of retention features 1680 faces proximally. It may be provided with a laterally tapered distal end. Such a lockout system prevents actuation of firing member 1660 when there is no new unfired cartridge or when there is a new unfired cartridge, but not properly seated within elongated channel 1102. . Additionally, the lockout system may prevent the clinician from advancing the firing member distally if a used or partially fired cartridge is accidentally properly seated within the elongated channel. . Another advantage that may be provided by the lockout system 1650 is that other firing member lockout configurations that require movement of the firing member into and out of alignment with corresponding slots/passages in the staple cartridge. Unlike, the firing member 1660 is held in alignment with the cartridge passageway while remaining in the locked and unlocked positions. Locking portion 1654 is designed to move laterally into and out of engagement with corresponding sides of the firing member. Such lateral movement of the locking portion(s) or locking portion(s) is distinguishable from other locking arrangements that move vertically to engage and disengage portions of the firing member. .

13 and 14, in one form, anvil 1130 comprises an elongated anvil body portion 1132 and a proximal anvil mounting portion 1150. As shown in FIG. Elongated anvil body portion 1132 includes an outer surface 1134 that defines two downwardly extending tissue stop members 1136 adjacent proximal anvil mounting portion 1150 . Elongated anvil body portion 1132 also includes a lower surface 1135 that defines elongated anvil slot 1138 . In the exemplary configuration shown in FIG. 14, anvil slot 1138 is centrally located within lower surface 1135 . Lower surface 1135 includes three rows 1140 , 1141 , 1142 of staple forming pockets 1143 , 1144 , and 1145 located on each side of anvil slot 1138 . Adjacent each side of anvil slot 1138 are two elongated anvil passages 1146 . Each passageway 1146 has a proximal ramp portion 1148 . Please refer to FIG. As firing member 1660 advances distally, upper anvil engagement feature 1632 enters corresponding proximal ramp portion 1148 first and then enters corresponding elongated anvil passageway 1146 .

12 and 13 , anvil slot 1138 and proximal ramp portion 1148 extend to anvil mounting portion 1150 . In other words, anvil slot 1138 divides or bifurcates anvil mounting portion 1150 into two anvil mounting flanges 1151 . Anvil mounting flanges 1151 are joined together at their proximal ends by a connecting bridge 1153 . Connecting bridge 1153 functions to provide support to anvil mounting flange 1151 and may function so that anvil mounting portion 1150 is more rigid than mounting portions of other anvil configurations, the anvil mounting flange being , are not connected at their proximal ends. As also seen in FIGS. 12 and 14, anvil slot 1138 has a widened portion 1139 for receiving the top of firing member 1660 and upper anvil engagement mechanism 1632 .

As seen in FIGS. 13 and 20-24, each of the anvil mounting flanges 1151 includes a lateral mounting hole 1156 configured to receive a pivot pin 1158 (FIGS. 10 and 20) therethrough. . Anvil mounting portion 1150 is pivotally pinned to proximal end 1103 of elongated channel 1102 by pivot pin 1158, which includes mounting holes 1107 and 1107 at proximal end 1103 of elongated channel 1102. Extends through mounting holes 1156 in anvil mounting portion 1150 . Such a configuration functions to pivotally secure anvil 1130 to elongated channel 1102 for selective pivotal movement about fixed anvil axis AA transverse to shaft axis SA. See FIG. Anvil mount 1150 also includes a cam surface 1152 that extends from central firing member parking area 1154 to outer surface 1134 of anvil body portion 1132 .

In the illustrated configuration, anvil 1130 moves between open and closed positions by axially advancing and retracting distal closure tube segment 1430 . As described in more detail below, the distal end of distal obturator section 1430 has an internal camming surface formed thereon, which may be formed on camming surface 1552 or anvil mounting portion 1150 . configured for camming engagement with a camming surface formed on the cam surface. FIG. 22, for example, shows a camming surface 1152a formed on anvil mounting portion 1150 to establish a single contact path 1155a with internal camming surface 1444 on distal obturator section 1430. FIG. 23 is configured for an internal camming surface 1444 on the distal obturator section, between the camming surface 1152 on the anvil mounting portion 1150 and the internal camming surface 1444 on the distal obturator section 1430, two Cam surface 1152b is shown establishing separate and distinct arcuate contact paths 1155b. In addition to other potential advantages discussed herein, such a configuration may serve to better distribute closure forces from distal closure tube segment 1430 to anvil 1130 . 24 is configured for the inner cam surface 1444 of the distal obturator section 1430 to provide three different contact areas 1155c and 1155d between the cam surface on the anvil mounting portion 1150 and the distal obturator section 1430. Establishing cam surface 1152c is shown. Regions 1155c and 1155d establish a larger area of camming contact between the cam surface(s) on distal closure tube segment 1430 and anvil attachment portion 1150 and close to anvil 1130. It can serve to distribute forces better.

As distal obturator tube segment 1430 cams into anvil attachment portion 1150 of anvil 1130 , anvil 1130 pivots about anvil axis AA thereby causing end 1133 of elongated anvil body portion 1132 to move distally. The proximal end pivots toward surgical staple cartridge 1110 and distal end 1105 of elongated channel 1102 . As anvil body portion 1132 begins to pivot, the anvil contacts the tissue to be cut and stapled, thereby creating a gap between lower surface 1135 of elongated anvil body portion 1132 and deck 1116 of surgical staple cartridge 1110. Positioned in When anvil body portion 1132 is compressed onto tissue, anvil 1130 may experience a significant amount of resistive force. These resistance forces are overcome as distal obturator tube 1430 continues its distal advancement. However, depending on their size and point of application to anvil body portion 1132, these forces tend to bend portions of anvil 1130, which may generally be undesirable. For example, such bending may cause misalignment between firing member 1660 and passages 1148 , 1146 within anvil 1130 . If the bending is excessive, such bending will greatly increase the amount of firing force required to fire the instrument (i.e., move firing member 1660 through tissue from its start position to its end position). can be driven). Such excessive firing force can result in damage to the end effector, and/or firing member, and/or knife bar, and/or firing drive system components, and the like. Accordingly, it may be advantageous for the anvil to be configured to resist such bending.

Figures 25-27 illustrate alternative anvil embodiments that include features that may improve the stiffness of the anvil body and resistance to bending forces that may occur during the closing and/or firing process. Anvil 1130' may otherwise be identical in construction to anvil 1130 described above, except for the differences discussed herein. As seen in these figures, anvil 1130' has an elongated anvil body 1132' having an upper body portion 1165 with anvil cap 1170 attached thereto. In the embodiment shown in FIGS. 25-27, anvil cap 1170 is generally rectangular in shape and has an outer cap perimeter 1172 . The perimeter 1172 of the anvil cap 1170 extends through a correspondingly shaped opening 1137 formed in the upper body portion 1165 and received on an axially extending inner shelf 1139 formed therein. configured to be inserted. Please refer to FIG. Inner ledges 1139 are configured to support corresponding long sides 1177 of anvil cap 1170 . In an alternative embodiment, anvil cap 1170 may slide over inner shelf 1139 through an opening (not shown) in distal end 1133 of anvil body 1132'. In yet another embodiment, no internal ledge is provided. Anvil body 1132' and anvil cap 1170 may be made from a suitable metal having the electrical conductivity necessary for welding. The first weld 1178 may extend around the entire cap perimeter 1172 of the anvil cap 1170 , or along the long side of the anvil cap 1170 , rather than the distal end 1173 and/or its proximal end 1175 . 1177 only. The first weld 1178 may be continuous, or it may be discontinuous or intermittent. In such embodiments where the first weld 1178 is discontinuous or intermittent, the weld section may be evenly distributed along the long side 1177 of the anvil cap 1170, or the weld section may be They may be more closely spaced closer to the distal end of 1177 or more closely spaced closer to the proximal end of long side 1177 . In still other configurations, the weld sections may be more closely spaced in the central region of the long side 1177 of the anvil cap 1170 .

28-30 show anvil cap 1170' configured to be “mechanically interlocked” to anvil body 1132' and welded to upper body portion 1165. As shown in FIG. In this embodiment, a plurality of retention formations 1182 are formed into wall 1180 of upper body portion 1165 defining opening 1137 . As used in this context, the term "mechanically interlocked" means, for example, regardless of the orientation of the elongated anvil body and without any additional retention or fastening such as welding and/or adhesives. Second, it means that the anvil cap remains fixed to the elongated anvil body. A retention formation 1182 may project inwardly from the opening wall 1180 into the opening 1137 . Retaining structure 1182 may be integrally formed into wall 1180 or otherwise attached thereto. Retention formation 1182 is designed to frictionally engage a corresponding portion of anvil cap 1170' when anvil cap 1170' is installed in opening 1137 to frictionally retain anvil cap 1170' therein. do. In the illustrated embodiment, the retention formation 1182 projects inwardly into the opening 1137 and is frictionally received within a correspondingly shaped engagement area 1184 formed in the perimeter 1172' of the anvil cap 1170'. are configured as follows. In the illustrated configuration, the retention formation 1182 corresponds only to the long side 1177' of the anvil cap 1170' and is the portion of the wall 1180 that corresponds to the distal end 1173 or the proximal end 1175 of the anvil cap 1170'. not provided to In an alternative configuration, retention formations 1182 may also be provided on portions of wall 1180 corresponding to distal and proximal ends 1173 and 1175 of anvil cap 1170' and long side 1177' thereof. In still other configurations, retention formations 1182 may be provided only on a portion of wall 1180 corresponding to one or both of distal and proximal ends 1173, 1175 of anvil cap 1170'. In still other configurations, the retention formation 1182 is a portion of the wall 1180 corresponding to the long side 1177' of the anvil cap 1170' and only one of the proximal and distal ends 1173, 1175 of the anvil cap 1170'. may be provided to the department. It will further be appreciated that the retaining projections in all of the foregoing embodiments may alternatively be formed on the anvil cap with the engagement regions formed on the elongated anvil body.

28-30, the retention formations 1182 are evenly spaced or evenly distributed along the wall portion 1180 corresponding to the long side 1177' of the anvil cap 1170'. In alternative embodiments, the retention formations 1182 may be spaced more closely together near the distal end of the long side 1177' or spaced more closely together near the proximal end of the long side 1177'. may be In other words, the spacing between these retention formations adjacent the distal end, the proximal end, or both the distal and proximal ends is a configuration located in the central portion of the anvil cap 1170'. It can be smaller than the body spacing. In still other configurations, the retention formations 1182 may be more closely spaced in the central region of the long side 1177' of the anvil cap 1170'. Also, in alternate embodiments, a correspondingly shaped engagement region 1184 may not be provided on the outer perimeter 1172' or on a portion of the perimeter 1172' of the anvil cap 1170'. In other embodiments, the retention formations and correspondingly shaped engagement regions may comprise different shapes and sizes. In an alternative arrangement, the retention formations may be sized with respect to the engagement areas so that there is no interference fit between them. In such configurations, the anvil cap may be held in place by welding, adhesive, or the like.

In an exemplary embodiment, the weld 1178' may extend around the entire perimeter 1172 of the anvil cap 1170', or the weld 1178' may extend along the distal end 1173' and/or its proximal end. It may be located only along the long side 1177' of the anvil cap 1170' and not along the portion 1175'. Welds 1178' may be continuous, or they may be discontinuous or intermittent. In those embodiments where the weld 1178' is discontinuous or intermittent, the weld segments may be evenly distributed along the long side 1177' of the anvil cap 1170', or the weld segments may be ' may be more closely spaced near the distal end of the long side 1177', or may be more closely spaced near the proximal end of the long side 1177'. In still other configurations, the weld sections may be more closely spaced in the central region of the long side 1177' of the anvil cap 1170'.

Figures 31 and 32 show another anvil configuration 1130" having an anvil cap 1170" attached thereto. In the illustrated embodiment, anvil cap 1170' is generally rectangular in shape and has an outer cap perimeter 1172'. The outer cap perimeter 1172'' is inserted through and extends through a correspondingly shaped opening 1137'' in the upper body portion 1165 of the anvil body 1132'' and has an axially extending inner shelf formed therein. 1139" and 1190". See Fig. 32. Shelves 1139" and 1190" support corresponding long sides 1177" of anvil cap 1170". In an alternative embodiment, the anvil cap 1170″ extends over the inner shelves 1139″ and 1190″ through an opening (not shown) in the distal end 1133″ of the anvil body 1132′. Anvil body 1132'' and anvil cap 1170'' may be made of a metallic material having the electrical conductivity necessary for welding. may extend around the entire portion 1172″, or may be located only along the long side 1177″ of the anvil cap 1170″, rather than the distal end 1173″ and/or its proximal end (not shown). Welds 1178 may be continuous, or may be discontinuous or intermittent.Continuous weld embodiments include, for example, the anvil cap shown in FIG. It will be appreciated that there is more weld surface area due to the irregularly shaped perimeter of the anvil cap 1170″ compared to embodiments with a straight perimeter. In such embodiments where the weld 1178'' is discontinuous or intermittent, the weld section may be evenly distributed along the long side 1177'' of the anvil cap 1170'', or the weld section may be 1177″ may be spaced more closely together, or may be spaced more closely together near the proximal end of the long side 1177″. may be more closely spaced in the central region of the long side 1177'' of the anvil cap 1170''.

Still referring to Figures 31 and 32, the anvil cap 1170" may be additionally welded to the anvil body 1132" by a plurality of second, separate "deep" welds 1192". For example, each weld 1192'' may be positioned at the bottom of a corresponding hole or opening 1194'' provided through the anvil cap 1170'' such that the separate welds 1192'' are formed into a ledge. It may be formed along a portion of anvil body 1132" between 1190" and 1139". See FIG. 32. Weld 1192" is formed along long side 1177" of anvil cap 1170". may be evenly distributed, or the welds 1192″ may be spaced more closely adjacent to the distal end of the long side 1177″, or may be closer to the proximal end of the long side 1177″. May be more closely spaced. Still in other configurations, the welds 1192" may be more closely spaced in the central region of the long side 1177" of the anvil cap 1170".

FIG. 33 shows another anvil cap 1170″ configured to be “mechanically interlocked” to the anvil body 1132″ and welded to the upper body portion 1165. A "snap" configuration is employed along each long side 1177''' of the anvil cap 1170'''. Specifically, a laterally-extending continuous or intermittent tab 1195''' projects from each of the long sides 1177''' of anvil cap 1170'''. Each tab 1195'' is associated with anvil body 1132'. ″ corresponds to the axial slot 1197′″ formed in ″. The anvil cap 1170'" slides through an opening (not shown) in the distal end of the anvil body 1132'" to "mechanically" secure the anvil cap to the anvil body 1132'". Tabs 1195'" and slots 1197'" may be sized with respect to each other to establish a sliding friction fit therebetween. Note that the anvil cap 1170''' may be welded to the anvil body 1132'''. Anvil body 1132''' and anvil cap 1170''' may be made from a metal having the electrical conductivity necessary for welding. The welds 1178′″ may extend around the entire perimeter 1172′″ of the anvil cap 1170′″ or may be located only along the long sides 1177′″ of the anvil cap 1170′″. Portions 1178''' may be continuous, or they may be discontinuous or intermittent. In such embodiments where the weld 1178''' is discontinuous or intermittent, the weld section may be evenly distributed along the long side 1177''' of the anvil cap 1170''', or the weld section may be , may be more closely spaced near the distal end of the long side 1177′″, or more closely spaced near the proximal end of the long side 1177′″. In the configuration, the weld sections may be more closely spaced in the central region of the long side 1177''' of the anvil cap 1170'''.

Anvil embodiments described herein with an anvil cap may provide several advantages. For example, one advantage can be easier processing of the anvil and firing member assembly. That is, the firing member may be installed through the opening in the anvil body while the anvil is attached to the elongated channel. Another advantage is that the top cap may improve the anvil's stiffness and resistance to the aforementioned bending forces that may be experienced when clamping tissue. By resisting such bending, the frictional forces normally encountered by firing member 1660 may be reduced. Accordingly, in a surgical staple cartridge, the amount of firing force required to drive the firing member from its start to end positions can also be reduced.

As described above, when anvil 1130 begins to pivot, anvil body 1132 contacts tissue to be cut and stapled, thereby creating a gap between the underside of elongated anvil body 1132 and the deck of surgical staple cartridge 1110. Positioned in When anvil body 1132 is compressed onto tissue, anvil 1130 may experience a significant amount of resistive force. These resistance forces must be overcome by the distal obturator tube segment 1430 in camming the anvil attachment portion 1150 in order to continue the closure process. These forces may be applied to the distal obturator section 1430 generally in the vertical direction V, which if excessive may cause the distal obturator section 1430 to expand or elongate vertically. (Distance ID in FIG. 31 may be incremented). If distal obturator tube 1430 extends vertically, distal obturator tube segment 1430 may not be able to effectively close anvil 1130 and retain anvil 1130 in a fully closed position. When that condition occurs, firing member 1660 may encounter dramatically higher resistance, which may then require a higher firing force to advance the firing member distally.

Figures 34 and 35 illustrate one form of closure member for applying a closing motion to movable jaws of a surgical instrument. In the illustrated configuration, the closure member comprises a distal closure tube section 1430 having a closure body portion 1470, for example. As described above, one form of interchangeable surgical instrument assembly 1000 is configured to facilitate selective articulation of surgical end effector 1100 . To facilitate such articulation, the distal obturator tube section 1430 is connected to the proximal obturator tube section 1410 by upper and lower tangs 1434 and 1436 and upper and lower double pivot links 1220 and 1222. movably connected. See FIG. In one configuration, the distal obturator tube section 1430 may be machined or otherwise formed from a round bar material, eg, manufactured from a suitable metallic material. In the illustrated configuration, the closure 1470 has an outer surface 1431 and an inner surface 1433 defining an upper wall 1440 having an upper wall cross-sectional thickness UWT and a lower wall 1442 having a lower wall thickness LWT. Upper wall portion 1440 is positioned above shaft axis SA, and lower wall portion 1442 is positioned below shaft axis SA. A distal end 1441 of top wall 1440 has an internal cam surface 1444 formed thereon at a cam angle Θ. Also, the illustrated embodiment provides a longer internal camming surface 1444 when UWT>LWT and the distal obturator segment has a uniform wall thickness than can be obtained if UWT>LWT is not present. function to A long internal cam surface may be advantageous in transmitting the closing force to the cam surface(s) on the anvil mounting portion 1150. 34 and 35, transition sidewalls 1446, 1448 located on each side of shaft axis SA between upper wall 1440 and lower wall 1442 may be generally parallel to each other. It includes generally flat, vertically extending inner sidewall surfaces 1451, 1453. As shown in FIG. Transition sidewalls 1446, 1448 each have a wall thickness that transitions from an upper wall thickness to a lower wall thickness.

In the illustrated configuration, distal obturator tube segment 1430 also includes a positive jaw or anvil opening mechanism 1462 corresponding to and projecting inwardly from sidewalls 1446 and 1448, respectively. 34 and 35, the anvil opening mechanism 1462 is machined or otherwise formed in the transition sidewalls 1446, 1448 adjacent the distal end 1438 of the distal obturator tube section 1430. formed on a lateral mounting body 1460 sized to be received within cavities 1447 , 1449 shaped to fit. The positive anvil opening mechanism 1462 extends inwardly through corresponding openings 1450, 1452 in the transition sidewalls 1446, 1448. In the illustrated configuration, lateral mounting body 1460 is welded to distal obturator tube segment 1430 by weld 1454 . In addition to or instead of welds, the lateral mounting body 1460 may be held in place using a mechanical/friction fit, tongue and groove arrangement, adhesives, or the like.

36-41 show an example of the use of distal obturator tube segment 1430 to move anvil 1130 from a fully closed position to a fully open position. 36 and 39 illustrate the position of the distal obturator section 1430 and, more specifically, the position of one of the positive anvil opening mechanisms 1462 when the distal obturator section 1430 is in the fully closed position. indicate. In the illustrated embodiment, anvil opening ramps 1162 are formed on the lower surface of each of the anvil mounting flanges 1151 . When anvil 1130 and distal obturator tube segment 1430 are in their fully closed positions shown in FIG. located in the cavity 1164. When in that position, the positive anvil opening mechanism 1462 does not contact the anvil mounting portion 1150, or at least does not apply significant opening motion or force thereto. 37 and 40 show the position of anvil 1130 and distal obturator section 1430 upon initial application of an opening motion to distal obturator section 1430 in the proximal direction PD. As seen in FIG. 37, positive jaw opening mechanism 1462 first contacts anvil opening ramp 1164 to initiate pivoting of anvil 1130 to the open position. In the illustrated configuration, each of the positive anvil opening features 1462 has a beveled or rounded distal end 1463 to facilitate better camming contact with the corresponding anvil opening ramp 1162. have. 38 and 41, distal obturator section 1430 has been retracted to its fully retracted position, in which positive anvil opening mechanism 1462 is distal to anvil opening ramp 1162. In FIGS. end, thereby pivoting the anvil 1130 to its fully open position, as shown therein. Other embodiments may not use a positive jaw opening mechanism, but to bias the anvil to the open position when the distal obturator tube segment is retracted to its proximal-most starting position. Additionally, it may rely on a spring or other biasing arrangement.

Figures 42 and 43 show another closure member for applying a closing motion to the movable jaws of a surgical instrument. In this example, the closure member comprises a distal closure tube segment 1430', which may be similar to distal closure tube segment 1430 without the positive anvil opening mechanism. Distal obturator tube segment 1430' has a closure 1470' having an outer surface 1440' and an inner surface 1433' defining upper and lower walls 1440' and 1442'. As discussed above, it is possible to use as large an internal cam surface 1444' as possible to maximize cam contact with the cam surface on the anvil mount 1150, thereby effectively transmitting the closing force thereto. may be desirable. Accordingly, the upper wall portion 1440' of the distal obturator section 1430' may be provided with the thickest wall thickness UWT, and the lower portion of the distal obturator section 1430' has the thinnest wall thickness LWT. good. For reference purposes, UWT and LWT are measured along a common reference line extending through the central axis or point C of distal obturator section 1430'. Thus, UWT>LWT if the UWT is diametrically opposed to the LWT. Such a wall thickness configuration facilitates forming a longer internal cam surface 1444'.

As seen in FIG. 43, distal obturator tube segment 1430' has an outer surface 1431' having a circular cross-sectional shape. Distal obturator tube section 1430' may be machined from solid bar material. In the illustrated example, an inner radius R ₁ from the first central axis A _inner extends to the inner surface 1433 ′, and an outer radius R ₂ from the second central axis A _outer extends to the outer surface 1431 ' extends to In the illustrated example, axis A _inner is offset from axis A _outer by a distance OR, and R ₂ >R ₁ .

FIG. 44 shows another closure member for applying a closing motion to movable jaws of a surgical instrument. In this example, the closure member comprises a distal closure tube section 1430'' having a closure 1470''. The closure 1470″ has an outer surface 1431′ and an upper wall portion 1440″ having an upper wall thickness UWT and a lower wall portion 1442″ having a lower wall thickness LWT and two sidewall portions 1435′ each having a sidewall pressure SWT. It has an inner surface 1433'' that defines a . In the illustrated example, UWT>LWT. Note that SWT>UWT. Therefore, SWT>UWT>LWT. In the illustrated configuration, sidewall portions 1435' have the same sidewall thickness SWT. In other configurations, sidewall portions 1435' may have different thicknesses. As seen in FIG. 44, each sidewall portion 1435' defines an interior surface portion 1437' extending vertically therein. In the illustrated embodiment, the vertically extending inner surface portions are substantially parallel to each other. Such thicker vertical sidewall portions 1435' may help prevent, or at least minimize, vertical stretching of the distal obturator tube segment 1430'' during use.

In the example shown in FIG. 45, R ₁ and R ₂ are measured from a common center point or central axis C and R ₁ >R ₂ . Each sidewall portion 1435" of the closure body portion 1470'" of the distal closure tube segment 1430'" extending between the upper portions 1431" and 1433" is approximately equal to the UWT at a point along the horizontal reference line HR. A horizontal reference line HR extends through the central axis C and is vertical along a vertical reference line VR where UWT and LWT can be measured and compared, therefore SWT=UWT. In other embodiments, the SWT may be slightly less than the UWT when measured along the horizontal reference line HR.The SWT is defined by the sidewall portions 1435' of the lower portion 1433 having a constant lower wall thickness LWT. '. Thus, the inner sidewall 1437 ″ is measured from a corresponding vertical reference axis VR′ that is perpendicular to the horizontal reference axis HR and parallel to the vertical reference axis VR. , it extends at an angle _A2 .

FIG. 46 shows another closure member for applying a closing motion to movable jaws of a surgical instrument. In this example, the closure member comprises a distal closure tube section 1430" having a rounded outer surface 1431", a closure body 1470" having a rectangular internal passageway 1439 extending therethrough. The outer surface 1431" is: It is located at a distance R from the geometric center point or central axis C. As shown, the upper wall thickness UWT is equal to the lower wall thickness LWT when measured along a vertical reference axis VR extending through the center point or central axis C. The thickness SWT of the sidewall portion 1437'' when measured along a horizontal reference axis HR extending through the center point or central axis C and perpendicular to the vertical reference axis VR is equal to the upper wall thickness and the lower wall thickness UWT. and LWT. Thus, SWT is greater than UWT and LWT. In other words, the portion of the distal obturator segment 1430″ lying above the horizontal datum HR lies below the horizontal datum HR. In this example, the sides 1437" are thicker than the upper and lower walls and the distal obturator section tends to elongate vertically. may tend to prevent or minimize An internal camming surface may be formed on the distal end of top wall portion 1440″.

In the illustrated configuration, anvil 1130 moves between open and closed positions by distally advancing distal closure tube segment 1430 . As seen in FIG. 41, distal end 1163 of anvil mounting flange 1151 may extend above deck surface 1116 of staple cartridge 1110 when anvil 1130 is in the fully open position. The distal end 1163 of the anvil mounting flange 1151 extends beyond the deck surface 1116 of the staple cartridge 1110 when the closure process is initiated by distally advancing the distal closure tube portion in distal direction DD. This prevents infiltration of tissue between them that could interfere with the closure process. See FIG. Once the anvil 1130 is moved to the fully closed position by the distal obturator section 1430, the lateral mounting body distal end 1461 on the distal obturator section 1430 prevents tissue from infiltrating between them. It also acts to stop the tissue to do so. See FIG.

FIG. 47 shows a portion of a surgical end effector 110', which may be similar to surgical end effector 110 of interchangeable surgical instrument assembly 100 of FIGS. 47, anvil 114 includes an elongated body portion 190 and an anvil mounting portion 192. In the embodiment shown in FIG. Anvil mounting portion 192 includes two spaced apart anvil mounting flanges 194 projecting proximally from elongated body portion 190 . Each anvil mounting flange 194 has an outwardly extending trunnion 196 thereon. Each trunnion 196 is movably received within a corresponding kidney-shaped or elongated arcuate trunnion slot 197 provided in elongated channel 112 . When the anvil 114 is in the "fully open" position, the trunnion 196 is generally located at the bottom 198 of the elongated arcuate trunnion slot 197 . The anvil 114 can be moved to the closed position by distally advancing the distal obturating tube portion 142 in distal direction DD, whereby the end 148 of the distal obturating tube portion 142 moves toward the anvil. It rides on a cam surface 193 formed on an anvil mount 192 of 114 . As distal end 148 of distal obturator tube segment 142 is advanced distally along cam surface 193 on anvil mounting portion 192 , distal obturator tube segment 142 pivots body portion 190 of anvil 114 . and move axially relative to surgical staple cartridge 116 . When distal obturator tube portion 142 reaches the end of its closing stroke, distal end 148 of distal obturator tube portion 142 abuts/contacts sheer anvil ledge 191 and body portion 190 . functions to position anvil 114 so that molded pockets (not shown) on the underside of the cartridge are properly aligned with the staples in the cartridge. Anvil ledge 191 is defined between cam surface 193 on anvil mounting portion 192 and elongated anvil body portion 190 . In other words, in this configuration, cam surface 193 does not extend to outermost surface 195 of anvil body 190 . After distal obturator tube 142 reaches this fully extended position, any further application of a closing motion/force to anvil 114 may cause damage to the anvil and/or closure system components. As seen in FIG. 47, in this configuration the closing force _FH is parallel to the shaft axis SA. The distance between an axis or plane _TA passing through the center of the _trunnion 196 and the closing force vector FH is represented as distance _XR . The product of this distance X _R and the closing force F _H represents the closing moment _CM applied to the anvil 114 .

48 and 49 show closure force configurations for anvil 1130 of surgical end effector 1100 of interchangeable instrument assembly 1000. FIG. As described above, anvil trunnion 1158 is pivotally mounted within bore 1154 in elongated channel 1102 . Unlike anvil 114 described above, anvil 1130 does not move axially. Instead, anvil 1130 is constrained to pivot only about anvil axis AA. between inner camming surface 1444 on distal obturating tube segment 1430 and camming surface 1152 on anvil mounting portion 1150 when distal obturating tube segment 1430 is advanced in distal direction DD under horizontal closure force F _H1 interaction will cause the distal obturator segment 1430 to experience a closure force vertical component VF. The resulting force vector F _N experienced by cam surface 1152 on anvil mounting portion 1150 is “perpendicular” or perpendicular to internal cam surface 1444 . Angle Θ in FIGS. 48 and 49 represents the angle of camming surface 1152, similar to internal camming surface 1440, horizontally. The distance between the resulting force vector FN and an axis or plane _TA extending through the center of the anvil _trunnion 1158 is denoted as the moment arm _MA . The product of this moment arm distance M _A and the resulting force vector F _N represents the closing motion C _M1 applied to anvil 1130 . Therefore, in applications where the horizontal closing force F _H =F _H1 , M _A >X _R and therefore the closing moment applied to anvil 1130 exceeds the closing moment applied to anvil 114, so that the closing moment applied to anvil 1130 is The actual amount of closing torque may exceed the amount of closing torque applied to anvil 114 . Figure 49 also shows the resistance established by the tissue during the closure process. _FT represents the force generated by tissue when it is clamped between the anvil and staple cartridge. This "opposite" kinetic moment M _T applied to the anvil 1130 is the distance X _T between the tissue force T _F extending through the center of the anvil trunnion 1158 and the axis or plane T _A and the tissue force T equal to the product with _F. Therefore, _CM1 must be _greater than MT to achieve the desired amount of anvil closure.

Returning to the embodiment shown in FIG. 47, firing bar 170 resides within elongated channel 112 when in the start or unfired position, and more particularly, the distal obturator tube portion in place. It can be seen attached to firing member 174 located fully distal to 142 , with top 175 of firing member 174 contacting a portion of anvil 114 . Such a configuration allows the anvil 114 to be fully or completely closed because the firing member 174 is positioned so that the top 175 can contact the anvil as the anvil 114 moves to the closed position. A greater closing force may be required to move it to the closed position. It should be noted that higher firing forces may be required to overcome frictional interference between the top portion 175 of the firing member 174 and the anvil 114 when the firing system is activated. Conversely, in end effector 1100 , firing member 1660 is “parked” within firing member parking area 1154 within distal obturator section 1430 , as seen in FIG. 48 . When firing member 1660 is positioned within firing member parking region 1154 within distal obturator section 1430, it cannot generate significant frictional forces with the anvil. Accordingly, one of the advantages that may be achieved by having the firing member 1660 reside entirely within the distal closure tube segment 1430 is a reduction in the amount of closure force required to close the anvil to the fully closed position; /or reduction in the amount of firing force required to advance the firing member from a starting position to an ending position within the end effector. In other words, so that the firing member 1660 is fully proximal to the distal end of the distal obturator section 1430 and the internal camming surface 1444 thereon, and any frictional contact between the firing member and the anvil. Parking the firing member 1660 so that it is in an eliminated or reduced starting position may ultimately require lower closure and firing forces to develop for end effector operation.

As noted above, excessive flexing of the anvil during the closing and firing process can result in the need for an undesirably higher firing force. Therefore, a stiffer anvil configuration is generally desirable. 20 and 21, another advantage that may be provided by the anvil 1130 and the elongated channel 1102 shown therein is that the anvil attachment portion 1150 of the anvil 1130 is generally more robust, and thus is more robust than other anvils. and being stiffer than an elongated channel configuration. 50 illustrates the use of rigid gussets 199 between anvil mounting flange 194 and elongated anvil body portion 190. FIG. A similar gusset configuration can be used between anvil mounting flange 1151 and anvil body 1132 of anvil 1130 to further increase anvil stiffness.

As mentioned above, interchangeable surgical instrument 1000 includes elastic spine member 1520 . As seen in FIGS. 6, 7, 7A, 8 and 51-54, the distal end 1522 of the elastic spine member 1520 is retracted by a telescoping mechanism 1530 formed in the elastic spine member 1520. 15 is separated from the proximal end 1524 . Note that the stretch limiting insert 1540 is held and supported between the distal end 1522 and the proximal end 1524 . In various configurations, the elastic spine member 1520 may be made from a suitable polymeric material, rubber, etc., having a modulus of elasticity designated as ME ₁ for reference purposes, for example. Telescoping mechanism 1530 may comprise a plurality of telescoping cavities 1532 . As seen in FIG. 7A, the illustrated telescoping mechanism 1530 comprises four triangular telescoping cavities 1532 configured to define a number of flexible wall portions 1534 therebetween. Other shapes and numbers of telescoping cavities 1532 may be used. The telescoping cavity 1532 may be molded or machined into the elastic spine member 1520, for example.

Still referring to FIGS. 6, 7 and 51-54, the stretch limiting insert 1540 comprises a body portion 1541 having a modulus of elasticity designated as ME ₂ for reference purposes. As seen in FIG. 6, body portion 1541 includes two downwardly extending mounting lugs 1542 each configured to seat within a mounting cavity 1535 formed in resilient spine member 1520 . See also FIG. 7A. A plurality of upper cavities 1543 are provided in the body portion 1541 in the illustrated configuration to provide the desired amount of stretchability and resilience to the stretch limiting insert 1540 . The illustrated embodiment is relatively square or rectangular in shape and includes four upper cavities 1543 spaced apart to define flexible walls 1544 therebetween. Other embodiments may have other numbers and shapes of upper cavities. The body portion 1541 of the illustrated expansion-limiting insert 1540 also includes a centrally located, downwardly projecting central lug portion 1545 that is configured to seat in the central cavity 1536 above the expansion mechanism 1530 . See FIG. 7A. In the illustrated embodiment, central lug portion 1545 includes a pair of central passageways 1546 extending laterally therethrough defining flexible walls 1547 therebetween.

Also, in the illustrated embodiment, the stretch limiting insert 1540 includes elongated lateral cavities 1548 located on each outer side of the body portion 1541 . Only one lateral cavity 1548 can be seen in FIGS. 6 and 51-54. Each elongated lateral cavity 1548 is configured to support a corresponding expansion limiter 1550 therein. Thus, in the described embodiment, two stretch limiters 1550 are used in the stretch limiting insert 1540. FIG. In at least one configuration, the telescopic limiter 1550 comprises an elongated body portion 1552 terminating in downwardly extending mounting lugs 1554 on each end. Each mounting lug 1554 is received in a corresponding lug cavity 1549 formed in body portion 1541 . The stretch limiter may have a modulus of elasticity of ME ₃ for reference purposes. In at _{least one} configuration, _ME3 <ME2<ME1.

Operation of interchangeable surgical instrument assembly 1000 when operably attached to handle assembly 500 will now be described in greater detail with respect to FIGS. 51-54. FIG. 51 shows anvil assembly 1130 in the released position. As seen in this view, distal obturator tube segment 1430 is in its starting or unactuated position, and positive anvil opening mechanism 1462 has pivoted anvil 1130 to the open position. Note that the firing member 1660 is in a non-actuated or starting position and the upper portion, including the upper nose portion 1630, is parked within the firing member parking area 1154 of the anvil mounting portion 1150. When the interchangeable instrument assembly 1000 is in this non-actuated state, the stretch limiting insert 1540 is in an unstretched state. The axial length of the expansion limiting insert 1540 when in the unstretched state is represented by L _US in FIG. L _US is between reference axis A, corresponding to the proximal end of body portion 1541 of expansion limiting insert 1540, and reference axis B, corresponding to the distal end of body portion 1541, as shown in FIG. represents the distance between The axis labeled F corresponds to the position of the distal end of staple cartridge 1110 properly seated within elongated channel 1102 . It will be appreciated that when the instrument assembly 1000 is in this non-actuated state, the elastic spine members 1520 are in a relaxed, unstretched state.

FIG. 52 shows interchangeable surgical instrument assembly 1000 after closure drive system 510 has been actuated as described above to drive distal closure tube segment 1430 distally in distal direction DD. As distal closure tube segment 1430 moves distally, camming surface 1444 on distal end 1441 of upper wall 1440 of distal closure tube segment 1430 cams with camming surface 1152 on anvil mounting portion 1150 . contact and pivot the anvil 1130 to the closed position shown. The closure drive system 510 moves the distal closure tube segment 1430 through the entire closure stroke distance and is then axially locked or otherwise held in that position by the closure drive system 510. . The closing force caused by the distal advancement of distal obturator tube segment 1430 over anvil 1130 also forces anvil 1130 and elongated channel 1102 distally DD when distal obturator tube segment 1430 contacts anvil attachment portion 1150 . to advance axially. Telescoping mechanism 1530 in elastic spine 1520 begins to telescope to accommodate this distal advancement of elongated channel 1102 and anvil 1130 . Axis B, as shown in FIG. 52, is the reference axis for the stretch limiting insert 1540 when it is in its relaxed or unstretched state. Axis C corresponds to the end of the expansion limiting insert 1540 after the expansion limiting insert has been expanded to its maximum length. Distance Ls represents the maximum amount or length that the stretch limiting insert 1540 can be elongated. Axis G corresponds to the position of the distal end of surgical staple cartridge 1110 after anvil 1130 has been moved to its "first" closed position. Distance LT between reference axis FG represents the axial distance that elongated channel 1102 and anvil 1130 have traveled during _actuation of closure drive system 510 . This distance L _T can be equal to the distance L _S that the stretch limiting insert 1540 has stretched during the closing process, as limited by the stretch limiter 1550 .

Returning to FIG. 51, it can be noted that a space S exists between each mounting lug 1554 of the telescopic limiter 1550 and the respective inner wall 1551 of the lug cavity 1549 prior to initiation of the closing process. As can be seen in Figure 52, the space S disappears. That is, each of the mounting lugs 1554 abuts a corresponding cavity wall 1549 in the expansion limiting insert 1540 . Thus, the stretch limiter 1550 functions to limit the amount of stretch experienced by the stretch-limiting insert 1540 , which extends the elongate channel 1102 relative to the proximal end portion 1524 of the elastic spine 1520 and distally of the anvil 1130 . The amount of movement is sequentially restricted. Distal obturator tube 1430 is axially locked in place by closure drive system 510 . When in that position, anvil 1130 is held in a “first” closed position relative to surgical staple cartridge 1110 . Firing member 1660 has not moved and remains parked in firing member parking area 1154 because firing drive system 530 has not yet been activated. The position of the lower surface of anvil 1130 when in the "first" closed position is represented by axis K in FIGS.

FIG. 53 shows the position of firing member 1660 after firing drive system 530 has been initially activated. As seen in this view, firing member 1660 has advanced distally from firing member parking area 1154 . Each of the upper portions of firing members 1660 , and more specifically upper anvil engagement features 1672 , enter proximal ramp portions 1138 of corresponding axial passages 1146 in anvil 1130 . At this point in the process, anvil 1130 may be under considerable bending stress caused by tissue clamped between the lower surface of anvil 1130 and the deck of staple cartridge 1110 . This bending stress, as well as the frictional resistance between various portions of the firing member and anvil 1130 and elongated channel 1102, during initial distal advancement of firing member 1660 causes elongated channel 1102 and distal closure. It serves to essentially hold the tube section in a static state. During this period, the amount of force required to fire firing member 1660, or in other words, to push firing member 1660 distally through the tissue clamped between anvil 1130 and cartridge 1110, is The amount of force required increases. See line 1480 in FIG. Also during this period, the stretch-limiting insert attempts to retract the elongated channel 1102 and anvil 1130 into the distal obturator section 1430 in the proximal direction PD. Once the amount of friction between firing member 1660, anvil 1130 and elongated channel 1102 is less than the retraction force generated by expansion limiting insert 1540, expansion limiting insert 1540 moves elongated channel 1102 and anvil 1130 away from each other. Pulling further proximally into the closed tube segment 1430 may be caused. The position of distal end 1113 of staple cartridge 1110 after elongated channel 1102 and anvil 1130 have been moved in proximal direction PD is represented as position H in FIG. The axial distance that elongated channel 1102 and anvil 1130 have traveled in proximal direction PD is represented as distance I in FIG. Proximal movement of anvil 1130 and elongated channel 1102 into distal obturator section 1430 may cause distal obturator section 1430 to apply an additional closing force to anvil 1130 . Line M in FIG. 54 represents the “second” closed position of anvil 1130 . The distance between position K and position M, represented as distance N, includes the vertical distance that distal end 1133 of anvil body 1132 moves between the first closed position and the second closed position. .

When the anvil 1130 is in the second closed position, applying an additional closing force to the anvil 1130 by the distal obturator section 1430 causes the tissue clamped between the anvil 1130 and the cartridge 1110 to cause the anvil 1130 to close. resists the amount of bending force applied to the Such a condition may result in better alignment between the passageway in anvil body 1130 and firing member 1660, which may assist the firing member as it continues to advance distally through end effector 1100. Ultimately, the amount of frictional resistance experienced by the 1660 can be reduced. Accordingly, the amount of firing force required to advance the firing member through the remainder of its firing stroke to the end position can be reduced. This reduction in firing force can be seen in the chart in FIG. The chart shown in Figure 55 compares the firing power (energy) required to fire the firing member from the beginning to the end of the firing process. Line 1480 represents the amount of firing force required to move firing member 1660 from its start position to its end position when end effector 1100 is clamping tissue therein. Line 1482 represents, for example, the amount of firing force required to move the firing member of interchangeable surgical instrument assembly 1000 described above. Line 1482 represents the firing force required to move firing member 174 from its start to end position through tissue clamped at end effector 110 or 110'. As seen in this chart, the firing force required by both surgical instrument assemblies 100, 1000 is such that the resilient spine assembly 1510 of interchangeable instrument assembly 1000 applies a second amount of closure force to the anvil. Substantially the same as or very similar to add point 1484 . As seen in the chart of FIG. 55, when a second amount of closing force is experienced by anvil 1130 (point 1484), the amount of closing force required to complete the firing process is less than the amount of closure force required to complete the closure process at 100.

FIG. 56 compares the amount of firing weight required to move the firing members of various surgical end effectors from a starting position (0.0) to an ending position (1.0). The vertical axis represents the amount of firing load and the horizontal axis represents the percentage of distance the firing member travels between the starting position (0.0) and the ending position (1.0). Line 1490 indicates, for example, the firing force required to fire the firing member of surgical instrument assembly 100 or similar instrument assembly. Line 1492 uses various projectile member modifications and configurations and is disclosed, for example, in U.S. Patent Application No. __________, entitled "STAPLE CARTRIDGE COMPRISING STAPLES WITH DIFFERENT CLAMPING BREADTHS," Attorney Docket No. END8047USNP/160195, and the present application. For firing the firing member of a surgical instrument assembly as may be disclosed in the other aforementioned U.S. patent applications filed on even date herewith and each of which is incorporated herein by reference in its entirety. Indicates the projectile force required. Line 1494 is necessary to fire the firing member from the start position to the end position of a surgical instrument assembly employing at least some of the features and configurations for stiffening the anvil disclosed herein. , indicates projectile power. Line 1496 is required, for example, to fire a surgical instrument assembly that employs an elastic spine configuration and at least some of the features and configurations for stiffening the anvil disclosed herein. Indicates projectile power. As seen in this figure, surgical instrument assemblies employing elastic spine configurations, and at least some of the anvil reinforcement configurations disclosed herein, have much lower force-to-launch requirements.

FIGS. 57-62 show forming pocket arrangement 10100 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 10100 comprises a proximal forming pocket 10110 and a distal forming pocket 10130 defined in the planar or tissue engaging surface 10107 of anvil 10101 . Pockets 10110 , 10130 are aligned along longitudinal pocket axis 10103 of forming pocket array 10100 . It is contemplated that staples are formed along pocket axis 10103 by forming pocket arrangement 10100 when deployed from a staple cartridge. 58 and 59, forming pocket arrangement 10100 further comprises a bridge or ridge 10105 defined between forming pockets 10110,10130. In this case, bridge portion 10105 is part of planar surface 10107 of anvil 10101 . Bridge portion 10105 includes a bridge width "W". Forming pocket array 10100 includes a center “C” defined within bridge portion 10105 . Forming pocket array 10100 is bilaterally symmetrical about bridge portion 10105, bilaterally symmetrical about pocket axis 10103, and rotationally symmetrical about center "C".

Forming pocket 10110 includes a pair of pocket sidewalls 10113 and forming pocket 10130 includes a pair of pocket sidewalls 10133 . The pocket sidewalls 10113, 10133 are oriented toward the forming surfaces of the pockets 10110, 10130 when the staple tips and/or staple legs first strike the sidewalls 10113, 10133 of the pockets 10110, 10130. and legs. 60-62, sidewalls 10113, 10133 extend from planar surface 10107 of anvil 10101 toward the formation surface of each pocket 10110, 10130. Referring to FIGS. The sidewalls 10113, 10133 of the forming pockets 10110, 10130 are oriented relative to the flat surface 10107 of the anvil 10101 at an angle θ to direct or direct the staple legs and/or tips of the staples toward the forming surface. angled. The sidewalls 10113, 10133 are configured to encourage formation of the staple tips and/or staple legs along the pocket axis 10103 as the staples are formed against the forming surfaces of the pockets 10110, 10130. be.

Referring again to FIG. 58, the forming surfaces of pockets 10110, 10130 comprise entry area forming surfaces 10111, 10131 and exit area forming surfaces 10112, 10132, respectively. In this case, the amount of surface area of the forming surfaces covered by the inlet area forming surfaces 10111, 10131 is equal to the amount of surface area of the forming surfaces covered by the outlet area forming surfaces 10112, 10132. As a result, the entry area forming surfaces 10111, 10131 transition into exit area forming surfaces 10112, 10132 at the center of each pocket 10110, 10130. FIG. The transition between the entrance area-forming surfaces 10111, 10131 and the exit area-forming surfaces 10112, 10132 defines the valleys, or troughs, of each pocket 10110, 10130. The valleys of the forming pockets 10110 , 10130 define portions or sections of the forming surface having the greatest vertical distance from the flat surface 10107 .

Referring to Figure 59, the forming surface of each pocket 10110, 10130 includes a longitudinal radius of curvature 10117, 10137, respectively. In this case, longitudinal radius of curvature 10117 is equal to radius of curvature 10137 . Similarly, in this case, longitudinal radius of curvature 10117 and longitudinal radius of curvature 10137 can form a symmetrical staple. In other embodiments, the longitudinal radius of curvature 10117 and the longitudinal radius of curvature 10137 can be different to form an asymmetric staple.

The valleys of the forming pockets 10110, 10130 also define the narrowest portion of the forming surface of each pocket 10110, 10130. FIG. 61 is a cross-sectional view of distal formation pocket 10130 along line 61-61 of FIG. This view shows the valley or trough of the distal forming pocket 10130. FIG. The outer edge of each pocket 10110,10130 defines the widest portion of the forming surface of each pocket 10110,10130. 60 shows a cross-sectional view of distal forming pocket 10130 along line 60-60 of FIG. 58 within exit region forming surface 10132 of distal forming pocket 10130. FIG. FIG. 62 is a cross-sectional view of distal forming pocket 10130 taken along lines 62-62 of FIG. The proximal staple legs are configured to land on the entry region forming surface 10111 of the proximal forming pocket 10110 and configured to exit from the exit region forming surface 10112 of the proximal forming pocket 10110 . Similarly, the distal staple legs are configured to land on the entry region forming surface 10131 of the distal prep pocket 10130 and to exit from the exit region forming surface 10132 of the distal prep pocket 10130 .

FIGS. 63-68 show forming pocket arrangement 10200 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 10200 comprises a proximal forming pocket 10210 and a distal forming pocket 10230 defined in a planar or tissue engaging surface 10207 of anvil 10201 . Pockets 10210 , 10230 are aligned along longitudinal pocket axis 10203 of forming pocket array 10200 . Staples are intended to be formed along pocket axis 10203 by forming pocket arrangement 10200 when deployed from a staple cartridge. 64 and 65, forming pocket arrangement 10200 further comprises a bridge portion 10205 defined between forming pockets 10210,10230. In this case, bridge portion 10205 is recessed relative to planar surface 10207 of anvil 10201 . Bridge portion 10205 includes a bridge width "W" and a bridge depth "D". Bridge depth “D” is the distance that bridge portion 10205 is recessed relative to flat surface 10207 . Forming pocket array 10200 includes a center “C” defined within bridge portion 10205 . Forming pocket array 10200 is bilaterally symmetrical about bridge portion 10205, bilaterally symmetrical about pocket axis 10203, and rotationally symmetrical about center "C".

Forming pocket arrangement 10200 further comprises a pair of major sidewalls 10208 extending from planar surface 10207 of anvil 10201 toward pockets 10210 , 10230 and bridge portion 10205 . Major sidewall 10208 is angled at angle θ ₂ with respect to plane 10207 of anvil 10201 . Forming pocket array 10200 includes: between the outer edges of pockets 10210, 10230 and planar surface 10207; between the longitudinal edges of pockets 10210, 10230 and major side walls 10208; 10205 and edge features 10215, 10235 providing a transition feature. These edges 10215, 10235 may be rounded and/or chamfered, for example. Edge features 10215, 10235 can help prevent staple tips from sticking, as discussed in more detail below.

Forming pocket 10210 includes a pair of pocket sidewalls 10213 and forming pocket 10230 includes a pair of pocket sidewalls 10233 . The pocket sidewalls 10213, 10233 are oriented toward the forming surfaces of the pockets 10210, 10230 when the staple tips and/or staple legs first strike the sidewalls 10213, 10233 of the pockets 10210, 10230. Configured to orient the legs of the staple. Side walls 10213, 10233 extend from transition edges 10215, 10235 toward the forming surface of each pocket 10210, 10230. FIG. The sidewalls 10213, 10233 of the forming pockets 10210, 10230 are flattened on the anvil 10201 at an angle θ ₁ to direct or direct the staple legs and/or tips toward the forming surfaces of the pockets 10210, 10230. angled with respect to surface 10207 . The sidewalls 10213, 10233 are configured to facilitate forming staple tips and/or staple legs along the pocket axis 10203 as the staples are formed against the forming surfaces of the pockets 10210, 10230. Configured. Collectively, main sidewall 10208 and pocket sidewalls 10213, 10233 can provide a funnel-like configuration for directing staple tips. 66 and 67, angle θ ₁ is greater than angle θ ₂ .

The pockets 10210, 10230 further comprise transition edges 10214, 10234 that provide a transition mechanism between the pocket sidewalls 10213, 10233 and the forming surface, as discussed in more detail below. In various embodiments, transition edges 10214, 10234 can have similar properties as transition edges 10215, 10235. In other examples, the transition edges 10214, 10234 can have different properties than the transition edges 10215, 10235. Thereby, the edges 10214, 10234 may be rounded or chamfered, for example. Edges 10214, 10234 are the first edges where edges 10214, 10234 meet the outer ends of pockets 10210, 10230 and edges 10214, 10234 approach bridge portion 10205 or the inner ends of pockets 10210, 10230. and a second edge. Edges 10214 , 10234 may transition to transition edges 10215 , 10235 near bridge portion 10205 . Edge features 10214, 10234, when formed, can also help prevent staple tips from sticking in pockets 10210, 10230, as discussed in more detail below.

Referring again to FIG. 64, the forming surfaces of pockets 10210, 10230 include entry area forming surfaces 10211, 10231 and exit area forming surfaces 10212, 10232, respectively. In this case, the amount of surface area of the forming surfaces covered by the inlet area forming surfaces 10211 and 10231 is greater than the amount of surface area of the forming surfaces covered by the outlet area forming surfaces 10212 and 10232 . As a result, the entrance area forming surfaces 10211, 10231 do not transition to the exit area forming surfaces 10212, 10232 at the center of each pocket 10210, 10230. FIG. Rather, the transition point where the inlet regions 10211, 10231 transition to the outlet regions 10212, 10232 is closer to the bridge portion 10205. The transitions between the entrance area-forming surfaces 10211, 10231 and the exit area-forming surfaces 10212, 10232 define the valleys or troughs of each pocket 10210, 10230. The valleys of the forming pockets 10210 , 10230 define portions or sections of the forming surface having the greatest vertical distance from the planar surface 10207 .

Referring to FIG. 65, the forming surface of each pocket 10210, 10230 includes two or more radii of curvature. Specifically, the pocket 10210 comprises an entrance radius of curvature 10217 corresponding to the entrance area forming surface 10211 and an exit radius of curvature 10218 corresponding to the exit area forming surface 10212 . Similarly, pocket 10230 comprises an entry radius of curvature 10237 corresponding to entry zone forming surface 10231 and an exit radius of curvature 10238 corresponding to exit zone forming surface 10232 . In this case, inlet radii of curvature 10217, 10237 are greater than outlet radii of curvature 10218, 10238, respectively. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

In addition to defining the transition point where the entry region transitions to the exit region, the valleys of the forming pockets 10210, 10230 also define the narrowest portion of the forming surface of each pocket 10210, 10230. Since the outer edge of each pocket 10210, 10230, also referred to as the inlet edge, defines the beginning of the inlet region forming surface 10211, 10231, they include the inlet width. Because the inner edge of each pocket 10210, 10230, also referred to as the exit edge, defines the terminal end of the exit area defining surface 10212, 10232, they include the exit width. In this case, the inlet width is greater than the outlet width. Also, the exit width is greater than the valley width or the narrowest portion of the forming surface. FIG. 67 is a cross-sectional view of distal formation pocket 10230 along line 67-67 of FIG. This view shows the valley or trough of the distal forming pocket 10230. FIG. This valley or trough is also the transition between the entrance area-forming surface 10231 and the exit area-forming surface 10232 . FIG. 66 shows a cross-sectional view of distal forming pocket 10230 along line 66-66 of FIG. 64 positioned within exit region forming surface 10232 of forming pocket 10230. FIG. 68 is a cross-sectional view of distal forming pocket 10230 taken along lines 68-68 of FIG. 64 within entry region forming surface 10232 of distal forming pocket 10230.

Forming pocket arrangement 10200 and various other forming pocket arrangements disclosed herein are configured for use with staples with various diameters. The diameter of staples used with forming pocket arrangement 10200 can vary, for example, between about 0.0079 inches and about 0.0094 inches. Additionally, the entry and exit radii of curvature of each forming surface are, for example, between about 1:5:1 and about 3 when the entry radius is between about 8 times the staple diameter and 10 times the staple diameter. :1 ratio. In at least one case, the entry radius and exit radius of curvature of each forming surface comprise a ratio of about 2:1, for example, when the entry radius is about nine times the staple diameter. In other cases, the entry and exit radii of curvature of each forming surface are, for example, greater than about 0.6 times the staple crown length and ridges, or bridges, or 1 times the width of the staple diameter. Including ratios from about 1:5:1 to about 3:1 when less than. In at least one case, the entry and exit radii of curvature of each forming surface are such that the entry radius is greater than about 0.6 times the staple crown length and ridge or bridge, or the width is 1 times the staple diameter. When less than, it includes a ratio of about 2:1. The exit radius of curvature is, for example, between about 4 times the staple diameter and about 6 times the diameter. In at least one case, the exit radius of curvature is about 4.5 times the staple diameter.

FIGS. 69-74 show forming pocket arrangement 10300 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 10300 comprises a proximal forming pocket 10310 and a distal forming pocket 10330 defined in a planar or tissue contacting surface 10307 of anvil 10301 . Pockets 10310 , 10330 are aligned along longitudinal pocket axis 10303 of forming pocket array 10300 . Staples are intended to be formed along the pocket axis 10303 by the forming pocket arrangement 10300 as they are deployed from the staple cartridge. 70 and 71, forming pocket arrangement 10300 further comprises a bridge portion 10305 defined between forming pockets 10310,10330. In this case, bridge portion 10305 is recessed relative to planar surface 10307 of anvil 10301 . Bridge portion 10305 includes a bridge width "W" and a bridge depth "D". Bridge depth “D” is the distance that bridge portion 10305 is recessed relative to flat surface 10307 . Forming pocket array 10300 includes a center “C” defined within bridge portion 10305 . Forming pocket array 10300 is bilaterally symmetrical about bridge portion 10305, bilaterally symmetrical about pocket axis 10303, and rotationally symmetrical about center "C".

Forming pocket arrangement 10300 further comprises a pair of major sidewalls 10308 extending from planar surface 10307 of anvil 10301 toward pockets 10310 , 10330 and bridge portion 10305 . Major sidewall 10308 is angled at angle θ ₂ with respect to plane 10307 of anvil 10301 . The forming pocket arrangement 10300 further comprises a pair of edge features 10309 that provide transition features between the outer edges of the pockets 10310, 10330 and the main side walls 10308. Edge 10309 also provides a transition mechanism between the central portion of main sidewall 10308 and bridge portion 10305 . These edges 10309 may be rounded and/or chamfered, for example. The edge features 10309 can help prevent the staple tips from sticking, as discussed in more detail below.

Forming pocket 10310 includes a pair of pocket sidewalls 10313 and forming pocket 10330 includes a pair of pocket sidewalls 10333 . The pocket sidewalls 10313, 10333 are oriented toward the forming surfaces of the pockets 10310, 10330 when the staple tips and/or staple legs first strike the sidewalls 10313, 10333 of the pockets 10310, 10330. Configured to orient the legs of the staple. Side walls 10313, 10333 extend from transition edge 10309 toward the forming surface of each pocket 10310, 10330. As shown in FIG. The sidewalls 10313, 10333 of the forming pockets 10310, 10330 are flattened on the anvil 10301 at an angle θ ₁ to direct or direct the staple legs and/or tips toward the forming surfaces of the pockets 10310, 10330. angled with respect to surface 10307 . The sidewalls 10313, 10333 are configured to form staple tips and/or staple legs along the pocket axis 10303 as the staples are formed against the forming surfaces of the pockets 10310, 10330. . Generally, the main sidewall 10308 and pocket sidewalls 10313, 10333 can provide a funnel-like configuration to accommodate staple tips. Referring to Figures 72 and 73, angle θ ₁ is greater than angle θ ₂ . In this case, the pocket sidewalls 10313, 10333 can be considered strong. For example, angle θ ₁ is 80 degrees. Similarly, angle θ ₂ is significantly smaller than angle θ ₁ . For example, angle θ ₂ is 4 degrees. Angle θ ₃ (FIG. 73) is defined as the angle between sidewalls 10333 between about 0 degrees and about 10 degrees. In various cases, angle θ ₃ is 0 degrees and walls 10333 are at least substantially parallel to each other.

The pockets 10310, 10330 further comprise transition edges 10306 that provide a transition mechanism between the pocket sidewalls 10313, 10333 and the forming surface, as discussed in more detail below. In various embodiments, transition edge 10306 can have properties similar to transition edge 10309 . In other examples, transition edge 10306 can have different properties than transition edge 10309 . Thereby, the edge 10307 may be rounded or chamfered, for example. Edges 10306, 10309 are the first edges where edges 10306, 10309 meet the outer ends of pockets 10310, 10330 and edges 10306, 10309 approach bridge portion 10305 or the inner ends of pockets 10310, 10330. and a second edge. Edge 10306 may transition to transition edge 10309 near bridge portion 10305 . The edge features 10306, if formed, can also help prevent staple tips from sticking in the pockets 10310, 10330, as discussed in more detail below.

Referring again to FIG. 70, the forming surfaces of pockets 10310, 10330 include entry area forming surfaces 10311, 10331 and exit area forming surfaces 10312, 10332, respectively. In this case, the amount of surface area of the forming surfaces covered by the inlet area forming surfaces 10311 and 10331 is greater than the amount of surface area of the forming surfaces covered by the outlet area forming surfaces 10312 and 10332 . As a result, the entry area forming surfaces 10311, 10331 do not transition to the exit area forming surfaces 10312, 10332 at the center of each pocket 10310, 10330. FIG. Rather, the transition point where the inlet regions 10311, 10331 transition to the outlet regions 10312, 10332 is closer to the bridge portion 10305. The transitions between the entrance area-forming surfaces 10311, 10331 and the exit area-forming surfaces 10312, 10332 define the valleys or troughs of each pocket 10310, 10330. The valleys of forming pockets 10310 , 10330 define portions or sections of the forming surface having the greatest vertical distance from planar surface 10307 . Note that when using the term "entrance" it corresponds to the "entrance" mechanism intended for the staple tips to enter the staple pocket during the staple firing process. Similarly, when the term "exit" is used, the "exit" corresponds to the "exit" mechanism intended for the staple tips to exit the staple pocket during the staple firing process.

Referring to FIG. 71, the forming surface of each pocket 10310, 10330 includes two or more radii of curvature. Specifically, the pocket 10310 includes an entrance radius of curvature 10317 corresponding to the entrance zone forming surface 10311 and an exit radius of curvature 10318 corresponding to the exit zone forming surface 10312 . Similarly, pocket 10330 includes an entry radius of curvature 10337 corresponding to entry zone-defining surface 10331 and an exit radius of curvature 10338 corresponding to exit zone-forming surface 10332 . In this case, the radii of curvature 10317, 10337 are larger than the radii of curvature 10318, 10338. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

The outer edge of each pocket 10310, 10330, also referred to as the inlet edge, because they define the beginning of the inlet region forming surface 10311, 10331, has an inlet width including. The inner edge of each pocket 10310, 10330, also referred to as the exit edge, because they define the ends of the exit region forming surfaces 10312, 10332, has an exit width including. In various cases, the outlet width is greater than large diameter staples configured for use with the forming pocket arrangement 10300 . The transition between the entrance region and the exit region includes a transition width less than the entrance width but greater than the exit width. FIG. 73 is a cross-sectional view of distal formation pocket 10330 taken along line 73-73 of FIG. This view shows the valley or trough of the distal forming pocket 10330. FIG. This valley or trough is also the transition between the entrance area-defining surface 10331 and the exit area-defining surface 10332 . 72 shows a cross-sectional view of distal forming pocket 10330 along line 72-72 of FIG. 70 positioned within exit region forming surface 10332 of forming pocket 10330. FIG. FIG. 74 is a cross-sectional view of distal forming pocket 10330 taken along line 74-74 of FIG. 70 within entry region forming surface 10332 of distal forming pocket 10330.

FIGS. 75-80 show forming pocket arrangement 10400 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 10400 comprises a proximal forming pocket 10410 and a distal forming pocket 10430 defined in a planar or tissue contacting surface 10407 of anvil 10401 . Pockets 10410 , 10430 are aligned along longitudinal pocket axis 10403 of forming pocket array 10400 . It is contemplated that staples are formed along pocket axis 10403 by forming pocket arrangement 10400 when deployed from a staple cartridge. 76 and 77, forming pocket arrangement 10400 further comprises a bridge portion 10405 defined between forming pockets 10410,10430. In this case, bridge portion 10405 is recessed relative to planar surface 10407 of anvil 10401 . Bridge portion 10405 includes a bridge width "W" and a bridge depth "D". Bridge depth “D” is the distance that bridge portion 10405 is recessed relative to planar surface 10407 . Forming pocket array 10400 includes a center “C” defined within bridge portion 10405 . Forming pocket array 10400 is bilaterally symmetrical about bridge portion 10405, bilaterally symmetrical about pocket axis 10403, and rotationally symmetrical about center "C".

Forming pocket arrangement 10400 further comprises a pair of major sidewalls 10408 extending from planar surface 10407 of anvil 10401 toward pockets 10410 , 10430 and bridge portion 10405 . Specifically, each sidewall 10408 shares an edge with only a portion of each pocket, as discussed in more detail below. Major sidewall 10408 is angled at angle θ ₄ with respect to plane 10407 of anvil 10401 .

Each forming pocket 10410, 10430 comprises a pair of pocket sidewalls, each pocket sidewall of each pair comprising a separate sidewall portion. For example, proximal forming pocket 10410 comprises a pair of pocket sidewalls each including separate sidewall portions 10413 and 10416 . Sidewall portion 10413 may be referred to as the inlet sidewall portion and sidewall portion 10416 may be referred to as the outlet sidewall portion. Similarly, distal forming pocket 10430 comprises a pair of pocket sidewalls each comprising separate sidewall portions 10433 and 10436 . Sidewall portion 10433 may be referred to as the inlet sidewall portion and sidewall portion 10436 may be referred to as the outlet sidewall portion. The pocket sidewalls 10413, 10416, 10433, 10436 are the forming surfaces of the pockets 10410, 10430 when the staple tips and/or staple legs first strike the sidewalls 10413, 10416, 10433, 10436 of the pockets 10410, 10430. configured to orient the staple tips and the legs of the staples toward.

Sidewall portion 10413 extends from planar surface 10407 toward the forming surface of proximal forming pocket 10410 . Sidewall portion 10413 transitions to the forming surface via transition mechanism 10414 . Another transition mechanism 10417 is provided between the separate sidewall portions 10413 and 10416 to provide a separate sidewall mechanism. Transition features 10414, 10417 may comprise rounded and/or chamfered surfaces, for example. The transition features 10414, 10417 may alternatively comprise separate edges. Sidewall portion 10416 shares an edge with major sidewall 10408 and extends from major sidewall 10408 toward the forming surface of proximal forming pocket 10410 . Side walls 10413 and 10416 are oriented at different angles to pocket axis 10403 . In this case, sidewall portion 10413 is at least substantially parallel to pocket axis 10403 and sidewall portion 10416 is angled at an angle θ ₃ to pocket axis 10403 . The phrase "substantially parallel" means an orientation that is approximately parallel or parallel to the pocket axis 10403.

Sidewall portion 10433 extends from planar surface 10407 toward the formation surface of distal formation pocket 10430 . Sidewall portion 10433 transitions to the forming surface via transition mechanism 10434 . Another transition mechanism 10437 is provided between the separate sidewall portions 10433 and 10436 to provide a separate sidewall mechanism. The transition features 10434, 10437 may comprise rounded and/or chamfered surfaces, for example. The transition features 10434, 10437 may alternatively comprise separate edges. Sidewall portion 10436 shares an edge with main sidewall 10408 and extends from main sidewall 10408 toward the formation surface of distal formation pocket 10430 . Sidewalls 10433 and 10436 are oriented at different angles to pocket axis 10403 . In this case, sidewall portion 10433 is at _least substantially parallel to pocket axis 10403 and sidewall portion 10436 is angled at angle θ3 with pocket axis 10403 . The phrase "substantially parallel" means an orientation that is approximately parallel or parallel to the pocket axis 10403.

Reference is now made to Figures 78-80. Sidewall portions 10413 , 10433 are angled with respect to planar surface 10407 of anvil 10401 at a different angle than sidewall portions 10416 , 10436 . For the sake of brevity, only the sidewall configuration of the distal forming pocket 10430 will be described. It should be noted, however, that the proximal forming pocket 10410 has a symmetrical configuration with the distal forming pocket 10430 because of the symmetry of the pockets 10410, 10430 described above. Beginning with FIG. 80, inlet sidewall portion 10433 is angled at angle θ ₁ with respect to planar surface 10407 . Referring now to FIG. 79, inlet sidewall portion 10436 is angled at angle θ ₂ with respect to planar surface 10407 . Angle θ ₂ is greater than angle θ ₁ . Angle θ ₂ is, for example, about 60 degrees to about 90 degrees. In various cases, angle θ ₂ is approximately 80 degrees. In other cases, angle θ ₂ is about 90 degrees. As can be seen, outlet sidewall portion 10436 is more angled or more vertical than inlet sidewall portion 10433 . Generally, sidewall portions 10433 , 10436 are angled with respect to flat surface 10407 of anvil 10401 to direct or direct the staple legs and/or staple tips toward the forming surface of distal pocket 10430 . and additionally controls the formation of the legs, as discussed in more detail below. Similarly, main sidewall 10408 and pocket sidewalls 10413, 10416, 10433, 10436 can be provided with a funnel-like configuration to accommodate staple tips.

In addition to the above, transition edges 10414, 10434 provide a transition mechanism between pocket sidewall portions 10413, 10416, 10433, 10436 and the forming surface. Edges 10414, 10434 are a first edge where edges 10414, 10434 meet the outer ends of pockets 10410, 10430 and edges 10414, 10434 meet bridge portion 10405 or the inner ends of pockets 10410, 10430. A second edge is provided. The edge features 10414, 10434, when formed, can help prevent staple tips from sticking in the pockets 10410, 10430, as discussed in more detail below.

Referring again to FIG. 76, the forming surfaces of pockets 10410, 10430 comprise entry area forming surfaces 10411, 10431 and exit area forming surfaces 10412, 10432, respectively. In this case, the amount of surface area of the forming surfaces covered by the inlet area forming surfaces 10411 and 10431 is greater than the amount of surface area of the forming surfaces covered by the outlet area forming surfaces 10412 and 10432 . As a result, the entry area forming surfaces 10411, 10431 do not transition to the exit area forming surfaces 10412, 10432 at the center of each pocket 10410, 10430. FIG. Rather, the transition point where inlet regions 10411, 10431 transition to outlet regions 10412, 10432 is near bridge portion 10405. FIG. The transitions between the entrance area-forming surfaces 10411, 10431 and the exit area-forming surfaces 10412, 10432 define the valleys, or troughs, of each pocket 10410, 10430. The troughs of the forming pockets 10410 , 10430 define portions or sections of the forming surface having the greatest vertical distance from the planar surface 10407 . In this case, the transition between the entrance area forming surfaces 10411, 10431 and the exit area forming surfaces 10412, 10432 occurs at transition mechanisms 10417,10437.

Referring to FIG. 77, the forming surface of each pocket 10410, 10430 includes two or more radii of curvature. Specifically, the pocket 10410 includes an entrance radius of curvature 10418 corresponding to the entrance zone forming surface 10411 and an exit radius of curvature 10419 corresponding to the exit zone forming surface 10412 . Similarly, pocket 10430 includes an entrance radius of curvature 10438 corresponding to entrance zone forming surface 10431 and an exit radius of curvature 10439 corresponding to exit zone forming surface 10432 . In this case, the radii of curvature 10418, 10438 are larger than the radii of curvature 10419, 10439. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

Because the outer edges of each pocket 10410, 10430, also referred to as the inlet edges, define the beginning of the inlet region forming surfaces 10411, 10431, they have an inlet width that is the widest width of the forming surface of each pocket 10410, 10430. including. Because the inner edge of each pocket 10410, 10430, also referred to as the exit edge, defines the distal end of the exit area forming surface 10412, 10432, they have an exit width that is narrower than the entrance width of the forming surface of each pocket 10410, 10430. including. A transition between the entrance region and the exit region includes a transition width that is less than the entrance width. In various cases the transition width is similar to the exit width (Fig. 76). The exit area forming surfaces 10412, 10413 comprise the narrowest portion of the forming surface of each pocket 10410, 10430. In this case, the narrowest portion is the valley or trough of each pocket 10410,10430. In various cases, the valley comprises a width that exceeds the largest diameter staple configured for use with forming pocket arrangement 10400 . FIG. 79 is a cross-sectional view of distal formation pocket 10430 taken along line 79-79 of FIG. This view is taken along the cross-section of the entrance region forming surface 10431 and shows the transition of each separate sidewall portion 10433,10436. 78 shows a cross-sectional view of distal forming pocket 10430 along line 78-78 of FIG. 76 positioned within exit region forming surface 10432 of forming pocket 10430. FIG. FIG. 80 is a cross-sectional view of distal forming pocket 10430 along line 80-80 of FIG. 76 within entry region forming surface 10432 of distal forming pocket 10430.

FIGS. 81-86 show forming pocket arrangement 10500 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 10500 comprises a proximal forming pocket 10510 and a distal forming pocket 10530 defined in a planar or tissue contacting surface 10507 of anvil 10501 . Pockets 10510 , 10530 are aligned along longitudinal pocket axis 10503 of forming pocket array 10500 . It is contemplated that staples are formed along pocket axis 10503 by forming pocket arrangement 10500 when deployed from a staple cartridge. 82 and 83, forming pocket arrangement 10500 further comprises a bridge portion 10505 defined between forming pockets 10510,10530. In this case, bridge portion 10505 is recessed relative to planar surface 10507 of anvil 10501 . Bridge portion 10505 includes a bridge width "W" and a bridge depth "D". Bridge portion 10505 is substantially V-shaped with a rounded bottom. Bridge depth “D” is the distance that the bottom of bridge portion 10505 is recessed relative to planar surface 10507 . Forming pocket array 10500 includes a center “C” defined within bridge portion 10505 . Formed pocket array 10500 is bilaterally symmetrical about bridge portion 10505, bilaterally symmetrical about pocket axis 10503, and rotationally symmetrical about center "C".

Forming pocket arrangement 10500 further comprises a pair of major sidewalls 10508 extending from planar surface 10507 of anvil 10501 toward pockets 10510 , 10530 and bridge portion 10505 . Major sidewall 10508 is angled at angle θ ₁ with respect to plane 10507 of anvil 10501 . The main sidewall 10508 has an inner edge that is curved or contoured for the pockets 10510,10530.

Forming pocket 10510 includes a pair of pocket sidewalls 10513 and forming pocket 10530 includes a pair of pocket sidewalls 10533 . The pocket sidewalls 10513, 10533 have a curved or contoured profile and help direct the staple tips and staple legs toward the forming surfaces of the pockets 10510, 10530 and to control the staple forming process. is configured to be Sidewalls 10513, 10533 extend from major sidewall 10508 and planar surface 10507 toward the forming surface of each pocket 10510, 10530. FIG. The sidewalls 10513, 10533 are configured to encourage formation of the staple tips and/or staple legs along the pocket axis 10503 as the staples are formed against the forming surfaces of the pockets 10510, 10530. be. In general, main sidewall 10508 and pocket sidewalls 10513, 10533 funnel cooperating corresponding staple tips toward the lateral center of each pocket 10510, 10530. FIG. As will be discussed in more detail below, the sidewalls 10513, 10533 comprise inlet and outlet portions, the inlet portion including less strong channeling formations than the outlet portion.

Referring again to FIG. 82, the forming surfaces of pockets 10510, 10530 include entry area forming surfaces 10511, 10531 and exit area forming surfaces 10512, 10532, respectively. The inlet area forming surfaces 10511, 10531 may coincide with passageway portions that are less strong than the passageway portions of the sidewalls 10513, 10533. Similarly, the inlet region forming surfaces 10512, 10532 may coincide with the stronger passageway portions of the sidewalls 10513, 10533. Pockets 10510, 10530 have formed grooves, also called tip control channels, that extend the entire longitudinal length of each pocket 10510, 10530 and are centrally located relative to the outer lateral edges of the pockets 10510, 10530. Alternatively, guide grooves 10515 and 10535 are further provided. 10515, 10535 are narrower at the outer longitudinal edges of the pockets 10510, 10530 than at the inner longitudinal edges of the pockets 10510, 10530. Grooves 10515, 10535 meet at bridge portion 10505 to encourage the staple tips and staple legs to contact each other during the forming process, as discussed in more detail below. In some cases, grooves defined in the forming surface of the forming pocket may have the same effect as a more strongly angled and/or narrowly configured outlet wall.

Referring to FIG. 83, the forming surface of each pocket 10510, 10530 includes two or more radii of curvature. Specifically, the pocket 10510 includes an entrance radius of curvature 10517 corresponding to the entrance zone forming surface 10511 and an exit radius of curvature 10518 corresponding to the exit zone forming surface 10512 . Similarly, pocket 10530 includes an entrance radius of curvature 10537 corresponding to entrance region-defining surface 10531 and an exit radius of curvature 10538 corresponding to exit region-defining surface 10532 . In this case, the radii of curvature 10517, 10537 are larger than the radii of curvature 10518, 10538. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

84-86, the longitudinal outer edges of each pocket 10510, 10530 are also referred to as inlet edges because they define the beginning of the inlet region forming surfaces 10511, 10531. FIG. The inlet edge includes an inlet width that is the maximum width of the forming surface of each pocket 10510, 10530. FIG. The inner edges of each pocket 10510, 10530 are also referred to as the exit edges because they define the terminal ends of the exit area forming surfaces 10512, 10532. The outlet edge includes an outlet width, also referred to as a bridge width "W", which is the narrowest portion of the forming surface of each pocket 10510, 10530. The transition between the entrance region and the exit region includes a transition width less than the entrance width but greater than the exit width. FIG. 85 is a cross-sectional view of distal formation pocket 10530 taken along line 85-85 of FIG. This view is taken near the valley or trough of the distal forming pocket 10530 . This valley or trough is also the transition between the entrance area-defining surface 10531 and the exit area-defining surface 10532 . In various cases, the transition between the entry and exit regions does not occur in the valleys or troughs of the pockets. FIG. 84 shows a cross-sectional view of distal forming pocket 10530 along line 84-84 of FIG. 82 positioned within exit region forming surface 10532 of forming pocket 10530. FIG. 86 is a cross-sectional view of distal forming pocket 10530 taken along line 86-86 of FIG. 82 within entry region forming surface 10532 of distal forming pocket 10530. Sidewall 10533 is straight, or at least substantially straight, in this view and is angled at angle θ ₂ with respect to plane 10507 . Angle θ ₂ is greater than angle θ ₁ .

The groove width may be narrower than the largest diameter staple configured for use with the forming pocket arrangement and may be larger than the smallest diameter staple configured for use with the forming pocket arrangement. In other examples, the flute width may be narrower than the smallest diameter staple configured for use with the forming pocket arrangement. Still, in other examples, the flute width may be wider than the largest diameter staple configured for use with the forming pocket arrangement. Additionally, the grooves defined in the forming pockets may optionally include multiple widths corresponding to the entry and exit regions. For example, the portion of the groove present in the inlet region can include a width that is less than the width of the portion of the groove present in the outlet region. In another example, the portion of the groove present in the inlet region can include a width that is greater than the width of the portion of the groove present in the outlet region. In other examples, only grooves that exist within one of the regions may include multiple widths.

FIGS. 87-92 show forming pocket arrangement 10600 configured to deform staples during a surgical stapling procedure. Formation pocket arrangement 10600 is similar in many respects to formation pocket arrangement 10100 . Forming pocket arrangement 10600 comprises a proximal forming pocket 10610 and a distal forming pocket 10630 defined in the planar or tissue contacting surface 10607 of anvil 10601 . Pockets 10610 , 10630 are aligned along longitudinal pocket axis 10603 of forming pocket array 10600 . It is contemplated that staples are formed along pocket axis 10603 by forming pocket arrangement 10600 when deployed from a staple cartridge. 88, forming pocket arrangement 10600 further comprises a bridge portion 10605 defined between forming pockets 10610, 10630. Referring to FIG. In this case, bridge portion 10605 is part of planar surface 10607 of anvil 10601 . Bridge portion 10605 includes an inner bridge width "W ₁ " and an outer bridge depth "W ₂ ". The inner bridge width "W1" is _{less than} the outer bridge width "W2". Forming pocket array 10600 includes a center “C” defined within bridge portion 10605 . Forming pocket array 10600 is bilaterally symmetrical about bridge portion 10605, bilaterally symmetrical about pocket axis 10603, and rotationally symmetrical about center "C".

Forming pocket 10610 includes a pair of pocket sidewalls 10613 and forming pocket 10630 includes a pair of pocket sidewalls 10633 . The pocket sidewalls 10613, 10633 are oriented toward the forming surfaces of the pockets 10610, 10630 when the staple tips and/or staple legs first strike the sidewalls 10613, 10633 of the pockets 10610, 10630. and legs. 90-92, sidewalls 10613, 10633 extend from planar surface 10607 of anvil 10601 toward the formation surface of each pocket 10610, 10630. Referring to FIGS. The sidewalls 10613, 10633 of the forming pockets 10610, 10630 are oriented with respect to the flat surface 10607 of the anvil 10601 at an angle θ to orient or direct the staple legs and/or tips toward the forming surface. angled. The sidewalls 10613, 10633 are configured to facilitate forming staple tips and/or staple legs along the pocket axis 10603 as the staples are formed against the forming surfaces of the pockets 10610, 10630. Configured.

Referring again to FIG. 87, the forming surfaces of the pockets 10610, 10630 each comprise an entry area forming surface 10611, 10631, an exit area forming surface 10612, 10632, and a groove or channel 10615, 10635 defined in the forming surface. In this case, the amount of forming surface surface area covered by inlet region forming surfaces 10611, 10631 is equal to the amount of forming surface surface area covered by outlet region forming surfaces 10612, 10632. As a result, the entry area-forming surfaces 10611, 10631 transition into exit area-forming surfaces 10612, 10632 at the center of each pocket 10610, 10630. FIG. The transitions between the entrance area-forming surfaces 10611, 10631 and the exit area-forming surfaces 10612, 10632 define the valleys, or troughs, of each pocket 10610, 10630. The valleys of forming pockets 10610 , 10630 define portions or sections of the forming surface having the greatest vertical distance from flat surface 10607 .

The forming surface also includes transition features 10616, 10636 surrounding grooves 10615, 10635, respectively, and transition features 10617, 10637 at the inner and outer longitudinal edges of pockets 10610, 10630, respectively. In this case transition features 10616, 10617, 10636, 10637 are rounded, however, transition features 10616, 10617, 10636, 10637 may be rounded in addition to or instead of any suitable features. may have sharp edges. Transition features 10616, 10636 provide a transition between grooves 10615, 10635 and the forming surface of each pocket 10610, 10630. Towards the central region of each pocket 10610,10630, transition features 10616,10636 may provide transitions between grooves 10615,10635 and sidewalls 10613,10633. Transition features 10617 , 10637 provide transitions between the forming surface and the flat surface 10607 . The transition mechanism 10617, 10637 includes extensions 10618, 10638 located at the proximal and distal ends of each groove 10615, 10635.

The valleys of the forming pockets 10610, 10630 also define the narrowest portion of the forming surface of each pocket 10610, 10630. FIG. 91 is a cross-sectional view of distal formation pocket 10630 along line 91-91 of FIG. This view shows the valley or trough of the distal forming pocket 10630. FIG. The outer longitudinal edge of each pocket 10610, 10630 defines the widest portion of the forming surface of each pocket 10610, 10630. 90 shows a cross-sectional view of distal forming pocket 10630 along lines 90-90 of FIG. 87 within exit region forming surface 10632 of distal forming pocket 10630. FIG. FIG. 92 is a cross-sectional view of distal forming pocket 10630 taken along line 92-92 of FIG. 87 within entry region forming surface 10632 of distal forming pocket 10630.

Figures 93-97 show a forming pocket arrangement 10700 configured to deform staples during a surgical stapling procedure. Formed pocket array 10700 is similar in many respects to formed pocket array 10600 . Forming pocket arrangement 10700 comprises a proximal forming pocket 10710 and a distal forming pocket 10730 defined in the planar or tissue contacting surface 10707 of anvil 10701 . Pockets 10710 , 10730 are aligned along longitudinal pocket axis 10703 of forming pocket array 10700 . It is contemplated that staples are formed along pocket axis 10703 by forming pocket arrangement 10700 when deployed from a staple cartridge. Referring to FIG. 94, forming pocket arrangement 10700 further comprises a bridge portion 10705 defined between forming pockets 10710,10730. In this case, bridge portion 10705 is part of flat surface 10707 of anvil 10701 . Bridge portion 10705 includes an inner bridge width "W ₁ " and an outer bridge depth "W ₂ ". The inner bridge width "W1" is _{less than} the outer bridge width "W2". Forming pocket array 10700 includes a center “C” defined within bridge portion 10705 . Forming pocket array 10700 is bilaterally symmetrical about bridge portion 10705, bilaterally symmetrical about pocket axis 10703, and rotationally symmetrical about center "C".

Forming pocket 10710 includes a pair of pocket sidewalls 10713 and forming pocket 10730 includes a pair of pocket sidewalls 10733 . The pocket sidewalls 10713, 10733 are oriented toward the forming surfaces of the pockets 10710, 10730 when the staple tips and/or staple legs first strike the sidewalls 10713, 10733 of the pockets 10710, 10730. Configured to orient the legs of the staple. 95-97, sidewalls 10713, 10733 extend from planar surface 10707 of anvil 10701 toward the forming surface of each pocket 10710, 10730. Referring to FIGS. The sidewalls 10713, 10733 of the forming pockets 10710, 10730 are oriented with respect to the flat surface 10707 of the anvil 10701 at an angle θ to orient or direct the staple legs and/or tips toward the forming surface. angled. Sidewalls 10713, 10733 are configured to form staple tips and/or staple legs along pocket axis 10703 as staples are formed against forming surfaces of pockets 10710, 10730. .

Referring again to FIG. 93, the forming surfaces of the pockets 10710, 10730 each comprise an entry area forming surface 10711, 10731, an exit area forming surface 10712, 10732, and a groove or channel 10715, 10735 defined in the forming surface. In this case, the amount of forming surface surface area covered by inlet region forming surfaces 10711 and 10731 is equal to the amount of forming surface surface area covered by outlet region forming surfaces 10712 and 10732 . As a result, the entry area-forming surfaces 10711, 10731 transition into exit area-forming surfaces 10712, 10732 at the center of each pocket 10710, 10730. FIG. The transition between the entrance area-forming surfaces 10711, 10731 and the exit area-forming surfaces 10712, 10732 defines the valleys, or troughs, of each pocket 10710, 10730. The valleys of the forming pockets 10710 , 10730 define portions or sections of the forming surface having the greatest vertical distance from the flat surface 10707 .

Grooves 10715 , 10735 aligned with pocket axis 10703 are defined only within a portion of each pocket 10710 , 10730 . In this case, the grooves 10715, 10735 are located entirely within the exit area defining surfaces 10712, 10732. In such instances, the groove may be located entirely within the inlet region. Grooves 10715, 10735 include edges 10716, 10736 that provide a transition between grooves 10715, 10735 and their respective forming surfaces. Edges 10716, 10736 include rounded contours, although flat, curved, and/or irregular contours are contemplated, for example. A rounded profile can help prevent the staple tip from sticking, as discussed in more detail below. Grooves 10715 , 10735 extend from central portions of their forming surfaces toward bridge portion 10705 of pocket array 10700 . Grooves 10715 , 10735 extend into bridge portion 10705 of pocket array 10700 . In other words, the grooves 10715,10735 extend beyond the inner longitudinal edges 10717,10737 of each pocket 10710,10730.

Referring to FIG. 95, groove 10735 and staple "S" are shown. 95 is a cross-sectional view of distal formation pocket 10730 taken along line 95-95 of FIG. 93. FIG. This cross-sectional view is taken within exit area defining surface 10732 . The diameter of staple “S” is greater than the width or diameter of groove 10735 . However, the diameter of staple “S” is less than the width of groove 10735 and transition edge 10736 . This prevents the body of staple “S” from contacting the bottom of groove 10735 . This configuration can help maintain minimal double tangential contact between the staples “S” formed within the exit region forming surface 10732 and exiting the distal pocket 10730 . Minimal contact between the staples and the pockets can help prevent sticking of the staple tips and provide more continuously formed staples, as discussed in more detail below. Staples used in this forming pocket arrangement may include a diameter that is greater than the width of groove 10735 and the width of edge 10736 . In this case, among other things, a similar double tangential contact can occur.

The valleys of the forming pockets 10710, 10730 also define the narrowest portion of the forming surface of each pocket 10710, 10730. 96 is a cross-sectional view of distal formation pocket 10730 taken along line 96-96 of FIG. 93. FIG. This view shows the valley or trough of the distal forming pocket 10730. FIG. The outer edge of each pocket 10710,10730 defines the widest portion of the forming surface of each pocket 10710,10730. 97 is a cross-sectional view of distal formation pocket 10730 taken along line 97-97 of FIG. 93 within entry region forming surface 10732 of distal formation pocket 10730. FIG.

FIGS. 98-102 show forming pocket arrangement 10800 configured to deform staples during a surgical stapling procedure. Formed pocket array 10800 is similar in many respects to formed pocket array 10600 . Forming pocket arrangement 10800 comprises a proximal forming pocket 10810 and a distal forming pocket 10830 defined in the planar or tissue contacting surface 10807 of anvil 10801 . Pockets 10810 , 10830 are aligned along longitudinal pocket axis 10803 of forming pocket array 10800 . Staples, however, are not intended to be formed along the pocket axis 10803 when deployed from a staple cartridge. Rather, staples are not intended to be formed away from pocket axis 10803 . Referring to FIG. 98, forming pocket arrangement 10800 further comprises a bridge portion 10805 defined between forming pockets 10810,10830. In this case, bridge portion 10805 is part of flat surface 10807 of anvil 10801 . Bridge portion 10805 includes an inner bridge width "W1" and _an outer bridge depth " _W2 ". The inner bridge width "W1" is _{less than} the outer bridge width "W2". Forming pocket array 10800 includes a center “C” defined within bridge portion 10805 . Forming pocket arrangement 10800 is bilaterally asymmetric about bridge portion 10805, bilaterally asymmetric about pocket axis 10803, and rotationally symmetric about center "C".

Forming pocket 10810 includes a pair of pocket sidewalls 10813 and forming pocket 10830 includes a pair of pocket sidewalls 10833 . The pocket sidewalls 10813, 10833 are oriented toward the forming surfaces of the pockets 10810, 10830 when the staple tips and/or staple legs first strike the sidewalls 10813, 10833 of the pockets 10810, 10830. Configured to orient the legs of the staple. 100-102, sidewalls 10813, 10833 extend from planar surface 10807 of anvil 10801 toward the forming surface of each pocket 10810, 10830. Referring to FIGS. The sidewalls 10813, 10833 of the forming pockets 10810, 10830 are oriented with respect to the flat surface 10807 of the anvil 10801 at an angle θ to orient or direct the staple legs and/or tips toward the forming surface. angled. Sidewalls 10813, 10833 are configured to depress or guide the staple tips and/or staple legs toward the formation surfaces of pockets 10810, 10830. FIG.

Referring again to FIG. 98, the forming surfaces of the pockets 10810, 10830 each comprise an entry area forming surface 10811, 10831, an exit area forming surface 10812, 10832, and a groove or channel 10815, 10835 defined in the forming surface. In this case, the amount of forming surface surface area covered by inlet region forming surfaces 10811 , 10831 is equal to the amount of forming surface surface area covered by outlet region forming surfaces 10812 , 10832 . As a result, the entry area-forming surfaces 10811, 10831 transition into exit area-forming surfaces 10812, 10832 at the center of each pocket 10810, 10830. FIG. The transitions between the entrance area-forming surfaces 10811, 10831 and the exit area-forming surfaces 10812, 10832 define the valleys or troughs of each pocket 10810, 10830. The valleys of the forming pockets 10810 , 10830 define portions or sections of the forming surface having the greatest vertical distance from the flat surface 10807 .

The forming surface also includes transition features 10816, 10836 surrounding the grooves 10815, 10835 and transition features 10817, 10837 at the inner and outer longitudinal edges of each pocket 10810, 10830. In this case, the transition features 10816, 10817, 10836, 10837 are rounded, however, the transition features 10816, 10817, 10836, 10837 may, for example, be rounded in addition to or instead of any suitable features. lined edges. Transition features 10816, 10836 provide transitions between grooves 10815, 10835 and surfaces forming pockets 10810, 10830, respectively. Towards the central regions of pockets 10810, 10830, transition features 10816, 10836 may provide transitions between grooves 10815, 10835 and sidewalls 10813, 10833. Transition features 10817 , 10837 provide transitions between the forming surface and the flat surface 10807 . The transition mechanism 10817, 10837 comprises extensions positioned at the proximal and distal ends of the grooves 10815, 10835.

Grooves 10815 , 10835 are angled with respect to pocket axis 10803 . Grooves 10815 and 10835 have inlet portions, respectively, with an inlet portion of groove 10815 and an inlet portion of groove 10835 on opposite sides of pocket axis 10803 and an outlet portion of groove 10815 and an outlet portion of groove 10835 on opposite sides of pocket axis 10803. and an outlet portion. This configuration helps the legs to form apart from each other. For example, instead of head-to-head contact between a pair of corresponding legs, the legs are configured to form an offset to and on either side of the pocket axis 10803 .

The valleys of the forming pockets 10810, 10830 also define the narrowest portion of the forming surface of each pocket 10810, 10830. FIG. 101 is a cross-sectional view of distal formation pocket 10830 along line 101-101 of FIG. This view shows the valley or trough of the distal forming pocket 10830. FIG. The longitudinal outer edge of each pocket 10810, 10830 defines the widest portion of the forming surface of each pocket 10810, 10830. FIG. 100 shows a cross-sectional view of distal forming pocket 10830 along line 100-100 of FIG. 98 within exit region forming surface 10832 of distal forming pocket 10830. FIG. FIG. 102 is a cross-sectional view of distal forming pocket 10830 taken along line 102-102 of FIG. 98 within entry region forming surface 10832 of distal forming pocket 10830.

FIGS. 103-107 show forming pocket arrangement 10900 configured to deform staples during a surgical stapling procedure. Forming pocket array 10900 can be similar to forming pocket array 10200 in many respects. Forming pocket arrangement 10900 comprises a proximal forming pocket 10910 and a distal forming pocket 10930 defined in a planar or tissue contacting surface 10907 of anvil 10901 . Pockets 10910 , 10930 are aligned along longitudinal pocket axis 10903 of forming pocket array 10900 . It is contemplated that staples are formed along pocket axis 10903 by forming pocket arrangement 10900 when deployed from a staple cartridge. 103 and 104, forming pocket arrangement 10900 further comprises a bridge portion 10905 defined between forming pockets 10910,10930. In this case, bridge portion 10905 is recessed with respect to planar surface 10907 of anvil 10901 . Bridge portion 10905 includes a first bridge width "W ₁ " and a second bridge depth "W ₂ ". The _first bridge width "W1" is greater than the _second bridge width "W2". The bridge portion also includes a bridge depth "D". Bridge depth “D” is the distance that bridge portion 10905 is recessed relative to planar surface 10907 . Forming pocket array 10900 includes a center “C” defined within bridge portion 10905 . Formed pocket arrangement 10900 is bilaterally symmetrical about bridge portion 10905, bilaterally symmetrical about pocket axis 10903, and rotationally symmetrical about center "C".

Forming pocket arrangement 10900 further comprises a pair of major sidewalls 10908 extending from planar surface 10907 of anvil 10901 toward pockets 10910 , 10930 and bridge portion 10905 . Major sidewall 10908 is angled at angle θ ₂ with respect to plane 10907 of anvil 10901 . The forming pocket arrangement 10900 provides transition features between the outer edges of the pockets 10910, 10930 and the planar surface 10907, and between the longitudinal edges of the pockets 10910, 10930 and the major sidewall 10908 edge features. 10915, 10935 are further provided. These edges 10915, 10935 may be rounded and/or chamfered, for example. Edge features 10915, 10935 can help prevent staple tips from sticking, as discussed in more detail below.

Forming pocket 10910 includes a pair of pocket sidewalls 10913 and forming pocket 10930 includes a pair of pocket sidewalls 10933 . The pocket sidewalls 10913, 10933 are oriented toward the forming surfaces of the pockets 10910, 10930 when the staple tips and/or staple legs first strike the sidewalls 10913, 10933 of the pockets 10910, 10930. Configured to orient the legs of the staple. Side walls 10913, 10933 extend from transition edges 10915, 10935 toward the forming surface of each pocket 10910, 10930. Sidewalls 10913, 10933 of forming pockets 10910, 10930 are flattened on anvil 10901 at angle θ ₁ to direct or direct staple legs and/or tips toward the forming surface of pockets 10910, 10930. angled with respect to surface 10907 . The sidewalls 10913, 10933 are configured to facilitate forming staple tips and/or staple legs along the pocket axis 10903 as the staples are formed against the forming surfaces of the pockets 10910, 10930. Configured. In general, main sidewall 10908 and pocket sidewalls 10913, 10933 can provide a funnel-like configuration configured to receive two staple tips. Referring to Figures 105 and 106, angle θ ₁ is greater than angle θ ₂ .

The pockets 10910, 10930 further include transition edges 10914, 10934 that provide a transition mechanism between the pocket sidewalls 10913, 10933 and the forming surface, as discussed in more detail below. In various embodiments, transition edges 10914, 10934 can comprise similar contours as transition edges 10915, 10935. FIG. In other examples, transition edges 10914, 10934 can comprise a different profile than transition edges 10915, 10935. FIG. In either case, edges 10914, 10934 may be rounded or chamfered, for example. Edges 10914, 10934 are the first edges where edges 10914, 10934 meet the outer corners of pockets 10910, 10930 and edges 10914, 10934 approach bridge portion 10905 or the inner ends of pockets 10910, 10930. and a second edge. Edges 10914 , 10934 may transition to transition edges 10915 , 10935 near bridge portion 10905 . Edge features 10914, 10934, when formed, can also help prevent staple tips from sticking in pockets 10910, 10930, as discussed in more detail below.

Referring again to Figures 103 and 104, the forming surfaces of the pockets 10910, 10930 comprise entry area forming surfaces 10911, 10931 and exit area forming surfaces 10912, 10932, respectively. In this case, the amount of surface area of the forming surfaces covered by the inlet area forming surfaces 10911 and 10931 is greater than the amount of surface area of the forming surfaces covered by the outlet area forming surfaces 10912 and 10932 . As a result, the entry area forming surfaces 10911, 10931 do not transition to the exit area forming surfaces 10912, 10932 at the center of each pocket 10910, 10930. FIG. Rather, the transition point where the inlet regions 10911, 10931 transition to the outlet regions 10912, 10932 is closer to the bridge portion 10905. The transition between the entrance area-forming surfaces 10911, 10931 and the exit area-forming surfaces 10912, 10932 defines the valleys, or troughs, of each pocket 10910, 10930. The troughs of the forming pockets 10910 , 10930 define portions or sections of the forming surface having the greatest vertical distance from the flat surface 10907 .

Referring to FIG. 104, the forming surface of each pocket 10910, 10930 includes two or more radii of curvature. Specifically, the pocket 10910 includes an entrance radius of curvature 10918 corresponding to the entrance zone forming surface 10911 and an exit radius of curvature 10919 corresponding to the exit zone forming surface 10912 . Similarly, pocket 10930 includes an entry radius of curvature 10938 corresponding to entry zone-defining surface 10931 and an exit radius of curvature 10939 corresponding to exit zone-forming surface 10932 . In this case, the radii of curvature 10918, 10938 are larger than the radii of curvature 10919, 10939. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

The forming surface of each pocket 10910, 10930 also includes grooves or channels 10916, 10936 defined along the entire longitudinal length of each pocket 10910, 10930, respectively. The forming surface may have a primary forming surface length and the groove may have a groove length that is greater than the primary forming surface length. Grooves 10916, 10936 are configured to guide the staple tips and/or legs during the forming process. The grooves also include transition edges 10917, 10937 that provide transitions between the forming surfaces and the grooves 10916, 10936 and between the grooves 10916, 10936 and the sidewalls 10913, 10933. Transition edges 10917, 10937 may include rounded and/or chamfered profiles, for example. Referring to FIG. 105, staple "S" is shown. FIG. 105 is a cross-sectional view of distal formation pocket 10930 taken along line 105-105 of FIG. This cross-sectional view is taken within the exit area defining surface 10932 . The diameter of staple “S” is greater than the width of groove 10936 . However, the diameter of staple “S” is less than the width of groove 10936 and transition edge 10937 . This prevents the body of staple “S” from contacting the deepest portion of groove 10936 . This configuration can help maintain minimal contact between the staples "S" as they are formed against the forming surface. Minimal contact between the staples and the pockets can help prevent sticking of the staple tips and provide more continuously formed staples, as discussed in more detail below. Forming pocket array 10900 is configured for use with staples of various diameters. In one case, the diameter of the staples may be smaller than the diameter of the width of the grooves 10916, 10936 so that the staples can enter and contact the deepest portions of the grooves 10916, 10936.

In addition to defining the transition point where the entry region transitions to the exit region, the valleys of the forming pockets 10910, 10930 also define the narrowest portion of the forming surface of each pocket 10910, 10930. Because the longitudinal outer edges of each pocket 10910, 10930, also referred to as the inlet edge, define the beginning of the inlet region forming surfaces 10911, 10931, they include the inlet width. Because the longitudinal inner edges of each pocket 10910, 10930, also referred to as the exit edges, define the terminal ends of the exit area-defining surfaces 10912, 10932, they include exit widths. In this case, the inlet width is greater than the outlet width. Also, the exit width is greater than the valley width or the narrowest portion of the forming surface. FIG. 106 is a cross-sectional view of distal formation pocket 10930 along line 106-106 of FIG. This view shows the valley or trough of the distal forming pocket 10930. FIG. This valley or trough is also the transition between the entrance area-forming surface 10931 and the exit area-forming surface 10932 . FIG. 107 is a cross-sectional view of distal forming pocket 10930 taken along lines 107-107 of FIG. 103 within entry region forming surface 10932 of distal forming pocket 10930.

FIGS. 108-112 show a formation pocket arrangement 11000 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 11000 comprises a proximal forming pocket 11010 and a distal forming pocket 11030 defined in a planar or tissue contacting surface 11007 of anvil 11001 . Pockets 11010 , 11030 are aligned along longitudinal pocket axis 11003 of forming pocket array 11000 . It is contemplated that the staples are formed away from the pocket axis 11003 by the forming pocket arrangement 11000 when deployed from the staple cartridge. 108 and 109, forming pocket arrangement 11000 further comprises a bridging portion 11005 defined between forming pockets 11010,11030. In this case, bridge portion 11005 is recessed relative to planar surface 11007 of anvil 11001 and angled relative to pocket axis 11003 . Bridge portion 11005 includes a bridge width "W" and a bridge depth "D". Bridge portion 11005 is substantially U-shaped with a substantially flat bottom. Bridge depth “D” is the distance that the flat portion of bridge portion 11005 is recessed relative to flat surface 11007 . Forming pocket array 11000 includes a center “C” defined within bridge portion 11005 . Forming pocket arrangement 11000 is bilaterally asymmetric about bridge portion 11005, bilaterally asymmetric about pocket axis 11003, and rotationally symmetric about center "C".

Forming pocket arrangement 11000 further comprises a pair of major sidewalls 11008 extending from planar surface 11007 of anvil 11001 toward pockets 11010, 11030 and bridge portion 11005. As shown in FIG. Major sidewall 11008 is angled at angle θ ₂ with respect to plane 11007 of anvil 11001 . The main sidewall 11008 has an inner edge that is curved or contoured for the pockets 11010,11030.

Forming pocket 11010 includes a pair of pocket sidewalls 11013 and forming pocket 11030 includes a pair of pocket sidewalls 11033 . The pocket sidewalls 11013, 11033 comprise a substantially V-shaped profile near the inlet portion and a curved or contoured profile. The sidewalls 11013, 11033 are configured to direct the staple tips and staple legs toward the forming surfaces of the pockets 11010, 11030 and to help control the staple forming process. Sidewalls 11013, 11033 extend from major sidewall 11008 and planar surface 11007 toward the forming surface of each pocket 11010, 11030. As shown in FIG. In general, main sidewall 11008 and pocket sidewalls 11013, 11033 funnel cooperating corresponding staple tips toward the forming surface of each pocket 11010, 11030. As shown in FIG. As discussed in more detail below, the sidewalls 11013, 11033 include an inlet portion and an outlet portion, the inlet portion including a less aggressive channeling arrangement than the outlet portion.

Referring again to FIG. 108, the forming surfaces of pockets 11010, 11030 comprise entry area forming surfaces 11011, 11031 and exit area forming surfaces 11012, 11032, respectively. The inlet area forming surfaces 11011, 11031 may coincide with channeling portions that are stronger than the channeling portions of the sidewalls 11013, 11033. The entry region forming surfaces 11011, 11031 may conform to the substantially V-shaped profile of each pocket 11010, 11030. FIG. Similarly, the inlet region forming surfaces 11012, 11032 may coincide with the stronger passageway portions of the sidewalls 11013, 11033. The exit area defining surfaces 11012, 11032 may conform to the curved or contoured contour of each pocket 11010, 11030. FIG. The pockets 11010, 11030 further comprise formed or guide grooves 11015, 11035 that extend the entire longitudinal length of the pockets 11010, 11030 and are located on one side of the pocket axis 11003 only. Grooves 11015 , 11035 are angled with respect to pocket axis 11003 . The grooves 11015,11035 are narrower at the outer longitudinal edges of the pockets 11010,11030 than at the inner longitudinal edges of the pockets 11010,11030. The grooves 11015, 11035 are also parallel, or at least substantially parallel, to each other.

Referring to FIG. 109, the forming surface of each pocket 11010, 11030 includes two or more radii of curvature. Specifically, the pocket 11010 includes an entrance radius of curvature 11017 corresponding to the entrance zone forming surface 11011 and an exit radius of curvature 11018 corresponding to the exit zone forming surface 11012 . Similarly, pocket 11030 includes an entrance radius of curvature 11037 corresponding to entrance region-defining surface 11031 and an exit radius of curvature 11038 corresponding to exit region-defining surface 11032 . In this case, the radii of curvature 11017, 11037 are larger than the radii of curvature 11018, 11038. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

Referring now to FIGS. 110-112, since the longitudinal outer edges of each pocket 11010, 11030 define the beginning of the entry region forming surfaces 11011, 11031, they are also referred to as entry edges. The inlet edge includes an inlet width that is the maximum width of the forming surface of each pocket 11010, 11030. FIG. Because the longitudinal inner edge of each pocket 11010, 11030 defines the distal end of the exit area defining surface 11012, 11032, they are also referred to as exit edges. The exit edge includes the exit width, which is the narrowest portion of the forming surface of each pocket 11010, 11030. FIG. The transition between the entrance region and the exit region includes a transition width less than the entrance width but greater than the exit width.

FIG. 110 is a cross-sectional view of distal formation pocket 11030 along line 110-110 of FIG. This view is taken within the exit area forming surface 11032 of forming pocket 11030 . The sidewalls 11033 on which the grooves 11035 slope are more curved and sloped than the other sidewalls 11033 on which the grooves 11035 slope away. FIG. 111 is a cross-sectional view of distal formation pocket 11030 along line 111-111 of FIG. This view is taken near the valley or trough of forming pocket 11030 . The curved or contoured profile of each sidewall 11033 is substantially similar near this portion of the pocket 11030, but the sidewalls 11033 against which the grooves 11035 are slanted are slanted in the direction the grooves 11035 move apart. Still more curved and more strongly slanted than the other sidewalls 11033 which are slanted. FIG. 112 is a cross-sectional view of distal formation pocket 11030 taken along line 112-112 of FIG. This view is taken within the entrance area forming surface 11031 of forming pocket 11030 . Side walls 11033 are substantially flat in this portion of the pocket. However, it can be seen that the sidewalls 11033 on which the grooves 11035 slope are still slightly curved. Sidewalls 11033, from which grooves 11035 slope away, are planar in this portion and are angled at angle θ ₁ with respect to flat surface 11007 . Angle θ ₁ is greater than angle θ ₂ .

FIGS. 113-117 show a forming pocket arrangement 11100 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 11100 comprises a proximal forming pocket 11110 and a distal forming pocket 11130 defined in a planar or tissue contacting surface 11107 of anvil 11101 . Pockets 11110 , 11130 are aligned along longitudinal pocket axis 11103 of forming pocket array 11100 . 113 and 114, forming pocket arrangement 11100 further comprises a bridge portion 11105 defined between forming pockets 11110,11130. In this case, bridge portion 11105 is part of planar surface 11107 of anvil 11101 . Bridge portion 11105 includes a bridge width "W". Forming pocket array 11100 includes a center “C” defined within bridge portion 11105 . Forming pocket arrangement 11100 is bilaterally symmetrical about bridge portion 11105, bilaterally asymmetrical about pocket axis 11103, and rotationally asymmetrical about center "C".

Each forming pocket 11110, 11130 includes a filled edge 11114, 11134 that extends around the perimeter of each pocket 11110, 11130, respectively. Edges 11114, 11134 provide curved transitions between flat surface 11107 and pockets 11110, 11130. FIG. Specifically, edges 11114 , 11134 transition planar surface 11107 into pocket sidewalls 11113 A, 11113 B of pocket 11110 and pocket sidewalls 11133 A, 11133 B of pocket 11130 . The edges 11114, 11134 also transition the planar surface 11107 into the entrance and exit portions of the forming surface of each pocket 11110, 11130. FIG.

Sidewalls 11113A, 11133A are angled at angle θ with respect to pocket axis 11103 . Sidewalls 11113B, 11133B comprise separate sidewall portions 11121, 11122, 11123 and 11141, 11142, 11143, respectively. Sidewall portions 11121 , 11141 are angled with respect to pocket axis 11103 at a different angle than the angle at which sidewall portions 11113 A, 11133 A are angled with pocket axis 11103 . Sidewall portions 11122 , 11142 are parallel or at least substantially parallel to pocket axis 11103 . Sidewall portions 11123, 11143 are parallel or at least substantially parallel to pocket sidewalls 11113A, 11133A. The sidewalls 11113A, 11113B, 11133A, 11133B are configured to direct the staple tips and staple legs toward the forming surfaces of the pockets 11110, 11130 and to help control the staple forming process.

Side walls 11113A, 11113B, 11133A, 11133B extend from transition edges 11114, 11134 to transition edges 11116, 11136. These edges 11116, 11136 provide a rounded or smoothed transition mechanism between the sidewalls 11113A, 11113B, 11133A, 11133B and the forming surface of each pocket 11110, 11130. The edges 11116, 11136 may have rounded and/or flat contours.

Referring again to FIG. 113, the forming surfaces of the pockets 11110, 11130 comprise entry area forming surfaces 11111, 11131 and exit area forming surfaces 11112, 11132, respectively. Pockets 11110, 11130 further include formed grooves or guide grooves 11115, 11135 defined within formed pockets 11110, 11130, respectively. Specifically, the grooves 11115, 11135 extend parallel or at least substantially parallel to the pocket axis 11103 and are present only in the entry region defining surfaces 11111, 11131. Pockets 11110, 11130 also include filled transition edges extending around the perimeter of grooves 11115, 11135, respectively, to provide a smooth transition between the forming surface and grooves 11115, 11135. . A filled transition edge can help ensure a two-point forming contact, as discussed in more detail below. Grooves 11115 , 11135 are also completely on one side of pocket axis 11103 .

Referring to FIG. 114, the forming surface of each pocket 11110, 11130 includes two or more radii of curvature. Specifically, the proximal pocket 11110 includes an entry radius of curvature 11127 corresponding to the entry region forming surface 11111 and an exit radius of curvature 11128 corresponding to the exit region forming surface 11112 . Similarly, distal pocket 11130 includes an entry radius of curvature 11147 corresponding to entry region forming surface 11131 and an exit radius of curvature 11148 corresponding to exit region forming surface 11132 . In this case, the radii of curvature 11117 and 11137 are larger than the radii of curvature 11118 and 11138 . In addition, the forming surface includes a transition point where the radius of curvature switches from the entrance radius of curvature 11127,11147 to the exit radius of curvature 11128,11148. In this case, this transition point occurs at the ends of grooves 11115 , 11135 near bridge portion 11105 . Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

Because the longitudinal outer edges of each pocket 11110, 11130 define the beginning of the entry region forming surfaces 11111, 11131, they are also referred to as entry edges. The inlet edge includes an inlet width that is the maximum width of the forming surface of each pocket 11110, 11130. FIG. Because the longitudinal inner edge of each pocket 11110, 11130 defines the distal end of the exit area defining surface 11112, 11132, they are also referred to as exit edges. The exit edge includes the exit width, which is the narrowest portion of the forming surface of each pocket 11110,11130. The transition point from the entrance region to the exit region includes a transition width less than the entrance width but greater than the exit width.

FIG. 115 is a cross-sectional view of distal formation pocket 11130 along line 115-115 of FIG. This view is taken within the exit area forming surface 11132 of forming pocket 11130 . FIG. 116 is a cross-sectional view of distal formation pocket 11130 along line 116-116 of FIG. This view is taken near the valley or trough of the forming pocket 11130 . It can be seen in this view that groove 11135 can be considered an extension of sidewall portion 11142 . 117 is a cross-sectional view of distal formation pocket 11130 taken along line 117-117 of FIG. 113. FIG.

Figures 118-125 show a forming pocket arrangement 11200 configured to deform staples during a surgical stapling procedure. Forming pocket arrangement 11200 comprises a proximal forming pocket 11210 and a distal forming pocket 11230 defined in a planar or tissue contacting surface 11207 of anvil 11201 . Pockets 11210 , 11230 are aligned along longitudinal pocket axis 11203 of forming pocket array 11200 . 118 and 119, forming pocket arrangement 11200 further comprises a bridging portion 11205 defined between forming pockets 11210,11230. In this case, bridge portion 11205 is recessed relative to planar surface 11207 of anvil 11201 . Bridge portion 11205 includes a bridge width "W" and a bridge depth "D". Bridge depth “D” is the distance that bridge portion 11205 is recessed relative to planar surface 11207 . Forming pocket array 11200 includes a center “C” defined within bridge portion 11205 . In this case, the center "C" is not the geometric center of the pocket array 11200; rather, the center "C" is identified near the center portion of the bridge portion 11205 to define an intermediate reference point between pockets. , in this case representing the lack of symmetry of pocket array 11200 . Specifically, the forming pocket arrangement 11200 is bilaterally symmetrical about the bridge portion 11205, bilaterally symmetrical about the pocket axis 11203, and rotationally asymmetrical about the center "C". Pockets 11210, 11230 differ in many ways, as discussed in more detail below.

Forming pocket arrangement 11200 further comprises a pair of major sidewalls 11208 extending from planar surface 11207 of anvil 11201 toward pockets 11210 , 11230 and bridge portion 11205 . Major sidewall 11208 is angled at angle θ with respect to plane 11207 of anvil 11201 .

The proximal forming pocket 11210 includes a pair of pocket sidewalls 11213 configured to direct staple tips and/or legs toward the forming surface of the pocket and to control staple formation. Pocket sidewalls 11213 are substantially vertical. In other words, sidewall 11213 is oriented at or about 90 degrees to flat plane 11207 of anvil 11201 . A pocket sidewall 11213 extends from the main sidewall 11208 toward the forming surface of the proximal pocket 11210 . In general, main sidewall 11208 and pocket sidewall 11213 funnel cooperating corresponding staple tips toward the forming surface of proximal pocket 11210 . Extending from sidewall 11213 to the forming surface of proximal forming pocket 11210 is transition mechanism 11214 . In this case, feature 11214 is curved, but feature 11214 may be flat in addition to or instead of being curved. These features 11214 can help prevent the staple tips from becoming stuck, as discussed in more detail below.

The forming surfaces of the proximal forming pocket 11210 comprise an entry area forming surface 11211 and an exit area forming surface 11212 . Entry region-forming surface 11211 corresponds to the proximal portion of proximal pocket 11210 . Exit region formation 11212 corresponds to the proximal portion of proximal pocket 11210 . Similarly, the entry area forming surface 11211 corresponds to a portion of the pocket 11210 and the corresponding staple tip is intended to enter or strike the pocket 11210 to initiate formation. Exit area forming surface 11212 corresponds to a portion of pocket 11210 and a corresponding staple tip is intended to exit pocket 11210 .

The forming surface of the proximal forming pocket 11210 also includes _a forming surface length L1 and _a forming surface depth V1. Length L ₁ is specified as the distance between the entrance edge of pocket 11210 and the exit edge of pocket 11210 . The forming surface depth V ₁ is identified as the deepest portion of the pocket 11210 or the trough of the pocket 11210 , also referred to as the valley of the pocket 11210 .

Distal prep pocket 11230 differs from proximal prep pocket 11210 in a number of ways. Distal forming pocket 11230 includes a pair of pocket sidewalls 11233 configured to direct staple tips and/or legs toward the forming surface of the pocket and to control staple formation. Sidewall 11233 comprises separate sidewall portions angled at different angles with respect to pocket axis 11203 . Pocket sidewalls 11233 are substantially vertical. In other words, sidewall 11233 is oriented 90 degrees, or at least substantially 90 degrees, with respect to flat plane 11207 of anvil 11201 . A pocket sidewall 11233 extends from the main sidewall 11208 toward the forming surface of the distal pocket 11230 . In general, main sidewall 11208 and pocket sidewall 11233 funnel cooperating corresponding staple tips toward the forming surface of distal pocket 11230 . Extending from sidewall 11233 to the forming surface of proximal forming pocket 11230 is transition mechanism 11234 . In this case, feature 11234 is curved, but feature 11234 may be flat in addition to or instead of being curved. These features 11234 can help prevent the staple tips from becoming stuck, as discussed in more detail below. Feature 11234 of distal forming pocket 11230 includes a smaller radius of curvature than feature 11231 of proximal forming pocket 11210 .

The forming surfaces of the distal forming pocket 11230 comprise an entry region forming surface 11231 and an exit region forming surface 11232 . Entry region forming surface 11231 corresponds to the distal portion of distal pocket 11230 . Exit region formation 11232 corresponds to the proximal portion of distal pocket 11230 . Similarly, entry region forming surface 11231 corresponds to a portion of pocket 11230 and the corresponding staple tip is intended to enter pocket 11230 or impact pocket 11210 to initiate formation. Exit region forming surface 11232 corresponds to a portion of pocket 11230 and a corresponding staple tip is intended to exit pocket 11230 .

_The forming surface of the distal forming pocket ₁₁₂₁₀ also includes a forming surface length L2 and a forming surface depth V2. Length L ₂ is specified as the distance between the entrance edge of pocket 11230 and the exit edge of pocket 11230 . The forming surface depth V2 is identified as the deepest portion of the pocket ₁₁₂₃₀ or the trough of the pocket 11230, also referred to as the valley of the pocket 11230. The forming surface length L ₂ of the distal pocket 11230 is greater than the forming surface length L ₁ of the proximal pocket 11210 . In addition, forming surface depth V ₁ of proximal pocket 11210 is greater than forming surface depth V ₂ of distal pocket 11230 . In other cases, forming surface depth V ₁ of proximal pocket 11210 may be less than forming surface depth V ₂ of distal pocket 11230 .

A difference in forming surface length between two pockets in a pocket arrangement intended to form one staple can be advantageous. In certain cases, tissue may be pushed forward during the firing stroke, for example, by advancement of a tissue-cutting knife, and as a result, tissue may be compressed forward during staple firing. When the staples are ejected from the cartridge into the tissue as the tissue moves longitudinally relative to the deck, this causes the tissue flow to force the staple legs and/or staple tips against their bases. may be flexed distally. In this case, the distal prep pocket, which has a larger preparation surface length than the proximal prep pocket, can account for this longitudinal deflection of the staple legs.

Referring to FIG. 119, the forming surface of each pocket 11210, 11230 includes two or more radii of curvature. Specifically, the proximal pocket 11210 includes an entry radius of curvature 11216 corresponding to the entry region forming surface 11211 and an exit radius of curvature 11217 corresponding to the exit region forming surface 11212 . Similarly, distal pocket 11230 includes an entry radius of curvature 11236 corresponding to entry region forming surface 11231 and an exit radius of curvature 11237 corresponding to exit region forming surface 11232 . In this case, the radii of curvature 11216, 11236 are larger than the radii of curvature 11217, 11237. Additionally, the entrance radii of curvature 11216, 11236 are different and the exit radii of curvature 11217, 11237 are different. Specific relationships between radii of curvature and various pocket features are discussed in more detail below, along with some potential benefits and patterns of specific relationships.

123-125, the longitudinal outer edge of the proximal pocket 11210 is also referred to as the entrance edge because it defines the beginning of the entrance region forming surface 11211. Referring to FIGS. The inlet edge has an inlet width that is the widest width of the forming surface of the proximal pocket 11210 . The entrance width of the forming surface of the proximal pocket 11210 is also greater than the bridge width "W". The inner longitudinal edge of the proximal pocket 11210 defines the distal end of the exit area defining surface 11212 and is therefore also referred to as the exit edge. The exit edge has an exit width that is the narrowest portion of the forming surface of the proximal pocket 11210 . The transition between the entrance area-forming surface 11211 and the exit area-forming surface 11212 includes a transition width that is less than the entrance width but greater than the exit width. The exit width and transition width of the forming surface of the proximal pocket 11210 are both less than the bridge width "W".

FIG. 123 is a cross-sectional view of proximal formation pocket 11210 along line 123-123 of FIG. This view is taken within the exit area forming surface 11212 of forming pocket 11210 . FIG. 124 is a cross-sectional view of proximal formation pocket 11210 taken along line 124-124 of FIG. This view is taken at or near the valley or trough of forming pocket 11210 . FIG. 125 is a cross-sectional view of proximal formation pocket 11210 along line 125-125 of FIG. This view is taken within the entrance area forming surface 11211 of forming pocket 11210 .

120-122, the longitudinal outer edge of the distal pocket 11230 is also referred to as the entrance edge because it defines the beginning of the entrance region forming surface 11231. Referring to FIGS. The inlet edge has an inlet width that is the widest width of the forming surface of the distal pocket 11230 . The entry width of the forming surface of the distal pocket 11230 is greater than the bridge width "W". The inner longitudinal edge of the distal pocket 11230 defines the end of the exit region forming surface 11232 and is therefore also referred to as the exit edge. The exit edge has an exit width that is the narrowest part of the forming surface of the distal pocket 11230 . The transition between the entrance area-forming surface 11231 and the exit area-forming surface 11232 includes a transition width that is less than the entrance width but greater than the exit width. The exit width and transition width of the forming surface of the distal pocket 11230 are both less than the bridge width "W". However, pocket 11230 is wider than bridge portion 11205 in terms of pocket width (distance between outer lateral edges) at these locations.

FIG. 120 is a cross-sectional view of distal formation pocket 11230 along line 120-120 of FIG. This view is taken within the exit area forming surface 11232 of forming pocket 11230 . FIG. 121 is a cross-sectional view of distal formation pocket 11230 along line 121-121 of FIG. This view is taken at or near the valley or trough of forming pocket 11230 . FIG. 122 is a cross-sectional view of distal formation pocket 11230 along line 122-122 of FIG. This view is taken within the entrance area forming surface 11231 of forming pocket 11230 .

Another asymmetric characteristic of forming pocket array 11200 includes the dimensions of the landing area of each pocket and the exit area of each pocket. For example, the proximal pocket has smaller landing and exit areas than the landing and exit areas of the distal pocket. Further, the center of alignment "C" does not correspond to the geometric center of the staple crown. Tailoring the specific mechanisms that form the pocket arrangement to better accommodate the expected tissue flow, which can ultimately result in different proximal and distal staple legs. , albeit asymmetric, can potentially lead to optimal forming pocket sequences.

A difference in forming surface depth between two pockets in a pocket arrangement intended to form a single staple can be advantageous. 126-129, two different stapling assembly configurations 11300 and 11300' are shown. One of the configurations 11300 (FIG. 126) comprises forming pockets with identical forming surfaces or valleys, depths. Other configurations 11300' (Fig. 128) include forming pockets with different forming surface depths. Both configurations 11300, 11300' are shown in an unclamped scenario where the anvil is substantially parallel to the top surface or deck of the staple cartridge.

The stapling assembly 11300 shown in FIG. 126 is configured to be ejected from the cartridge 11311 by a first jaw 11310 comprising a staple cartridge 11311, a second jaw 11320 comprising an anvil 11321, and a thread 11312. It comprises staples 11301 removably stored in cartridge 11311 . The thread 11312 contacts the driving surface 11303 of the staples 11301 and presses the staples 11301 toward the forming pockets 11323 of the anvils 11321 to form staple legs 11304 (proximal legs) extending from the staple base 11302 of each staple 11301 . a cam or pusher surface 11313 configured to form 11305 (distal leg). As noted above, the forming pockets 11323 of this configuration 11300 include the same forming surface depth. The depth is the distance between the flat anvil surface 11322 of the pocket 11323 and the valley or trough. When forming staples 11301 with anvils 11321 of configuration 11300, distal legs 11305 have a greater formed height than proximal legs 11304 when the anvil is angled at an angle θ relative to cartridge deck 11314. (Fig. 127). This also explains that the distal leg 11305 is not fully formed due to the fact that the anvil 11321 is not clamped into a position such that the flat anvil surface 11322 is parallel to the cartridge deck 11314. can also

Stapling assembly 11300' shown in FIG. 128 includes all of the same elements as stapling assembly 11300 except for second jaw 11320. The stapling assembly 11300' comprises a second jaw 11320' comprising a flat anvil surface 11322' and an anvil 11321' including a plurality of forming pockets 11323A, 11323B defined in the anvil 11321'. As noted above, forming pockets 11323A, 11323B of this configuration 11300' include different forming surface depths. A proximal pocket 11323A configured to form a proximal staple leg, such as proximal staple leg 11304, includes a deeper forming surface depth than distal pocket 11323B. A distal pocket 11323B configured to form a distal staple leg, such as distal staple leg 11305, faces the forming surface of proximal pocket 11323A to potentially cause angled jaws 11320'. Shallower than deep. When forming staples 11301 with anvil 11321' of configuration 11300', where the anvil is angled at an angle θ relative to cartridge deck 11314, proximal leg 11304 and distal leg 11305 are identical: Or they may be formed at substantially the same forming height (Fig. 130).

Although the anvil is intended to be clamped into a position that places the anvil surface substantially parallel to the deck of the cartridge, this does not always occur. For example, due to unexpected tissue behavior and/or the nature of the surgical stapling procedure, thicker tissue sections may end at the distal portion of the end effector (which is the next step of the stapled tissue). (This can occur with already stapled tissue re-clamped to the proximal portion of the end effector for subsequent firing, which is thinner and more compact than the tissue at the distal end of the portion). Therefore, the anvil may not be clamped into a substantially parallel configuration with respect to the cartridge. As a result, the staple can be formed similar to staple 11301 of FIG. 127, having one partially formed leg 11305 and one fully formed leg 11304. FIG. Instead of designing the anvil to ensure parallel alignment with the cartridge when clamped, one solution is to accommodate the possibility of non-parallel alignment, forming pocket arrays or forming pockets, as described above. It can be to design pocket pairs. Further, when the anvil shown in configuration 11300' shown in FIG. 128 is clamped at least substantially parallel to deck 11314, the distal legs of the staples may be formed at the top. Forming staples at the top may be advantageous in some circumstances over stapling at the bottom, or even partially (FIG. 127). Providing a valley depth difference between the pocket pair can prevent crimping between the proximal and distal legs of the staple.

Figures 130-133 show various anvils used with surgical instruments to form surgical staples. FIG. 130 shows an anvil 11400 with a cartridge facing portion 11401 . Anvil 11400 comprises a pair of longitudinally inner rows 11407A, 11407B of forming pockets 11405, a pair of longitudinally intermediate rows 11408A, 11408B of forming pockets 11405, and a pair of longitudinally outer longitudinal rows 11409A, 11409B of forming pockets 11405. . Rows 11407A, 11407B, 11408A, 11408B, 11409A, 11409B are aligned with or substantially parallel to longitudinal anvil axis 11403 . A forming pocket 11405 is defined in the cartridge facing portion 11401 . For example, cartridge facing portion 11401 may be planar or may comprise a plurality of stepped surfaces. For example, the cartridge facing portion 11401 may have inner rows 11407A, 11407B and intermediate rows 11408A, 11408B of forming pockets 11405 defined in one of the steps and outer rows 11409A, 11409B of forming pockets 11405 defined in the other step. may be provided with two different stepped surfaces. Another embodiment may include three different stepped surfaces, with the inner rows 11407A, 11407B of forming pockets 11405 defined in the first step and the intermediate rows 11408A, 11408B of forming pockets 11405 in the second step. 11409A, 11409B of forming pockets 11405 are defined in the third stage.

FIG. 131 shows an anvil 11410 comprising a cartridge facing portion 11411 and laterally varying pairs of formed pockets defined therein. Anvil 11410 includes a pair of longitudinally inner rows 11417A, 11417B of forming pocket pair 11421, a pair of longitudinally intermediate rows 11418A, 11418B of forming pocket pair 11423, and a pair of longitudinally outer longitudinal rows 11419A, 11419B of forming pocket pair 11425. and Rows 11417A, 11417B, 11418A, 11418B, 11419A, 11419B are aligned with or substantially parallel to longitudinal anvil axis 11413 . Forming pocket pairs 11421 , 11423 , 11425 are defined in cartridge facing portion 11401 . Pocket pair 11421 consists of a first type of forming pocket 11422 . These forming pockets 11422 may be similar in many respects to forming pockets 10210, 10230, for example. Pocket pair 11423 is composed of a second type of formed pockets 11424A (proximal), 11424B (distal) that are asymmetric. Forming pockets 11424A, 11424B may be similar in many respects to forming pockets 11210, 11230, for example. Pocket pair 11425 consists of a third type of formed pocket 11426 . These forming pockets 11422 may be similar in many respects to forming pockets 10110, 10130, for example. Anvil 11410 may also include various stepped configurations, as described with respect to anvil 11400, among others.

FIG. 132 shows an anvil 11430 comprising a cartridge facing portion 11431 and longitudinally varying pairs of formed pockets defined therein. The anvil 11430 includes a pair of longitudinal inner rows 11437A, 11437B including forming pocket pairs 11441, 11443, 11445, a pair of longitudinal intermediate rows 11438A, 11438B including forming pocket pairs 11441, 11443, 11445, and a forming pocket pair 11441. , 11443, 11445. Rows 11437A, 11437B, 11438A, 11438B, 11439A, 11439B are aligned with or substantially parallel to longitudinal anvil axis 11433 . Forming pocket pairs 11441 , 11443 , 11445 are defined in cartridge facing portion 11431 . Pocket pair 11441 consists of a first type of forming pocket 11442 . These forming pockets 11442 may be similar in many respects to forming pockets 10210, 10230, for example. Pocket pair 11443 is comprised of a second type of formed pocket 11444 . These forming pockets 11444 may be similar in many respects to forming pockets 10110, 10130, for example. Pocket pair 11445 is comprised of a third type of forming pocket 11446A (proximal), 11446B (distal) that is asymmetric. Forming pockets 11446A, 11446B may be similar in many respects to forming pockets 11210, 11230, for example. Anvil 11430 may also include various stepped configurations, as described with respect to anvil 11400, among others.

FIG. 133 shows an anvil 11450 with a cartridge facing portion 11451 and formed pocket pairs that vary longitudinally and laterally on the anvil 11450 . Anvil 11450 includes a pair of longitudinally inner rows 11457A, 11457B of forming pocket pair 11461, a pair of longitudinally intermediate rows 11458A, 11458B of forming pocket pair 11463, 11465, and a pair of longitudinally outer longitudinal rows 11459A of forming pocket pair 11467. , 11459B. Rows 11457A, 11457B, 11458A, 11458B, 11459A, 11459B are aligned with or substantially parallel to longitudinal anvil axis 11453 . Forming pocket pairs 11461 , 11463 , 11465 , 11467 are defined in cartridge facing portion 11451 . Pocket pair 11461 consists of a first type of forming pocket 11462 . These forming pockets 11462 may be similar in many respects to forming pockets 10510, 10530, for example. Pocket pair 11463 consists of a second type of formed pocket 11464 . These forming pockets 11464 may be similar in many respects to forming pockets 10210, 10230, for example. Pocket pair 11465 is comprised of a third type of formed pocket 11466A (proximal), 11466B (distal) that is asymmetric. Forming pockets 11466A, 11466B may be similar in many respects to forming pockets 11210, 11230, for example. Pocket pair 11467 consists of a fourth type of formed pocket 11468 . These forming pockets 11468 may be similar in many respects to forming pockets 10110, 10130, for example. Anvil 11450 may also include various stepped configurations, as described with respect to anvil 11400, among others.

In addition to or instead of varying the pocket pairs laterally and/or longitudinally, the anvil may have one type of formed pocket on one side of the anvil axis and another type on the other side of the anvil axis. and a formed pocket of Also, one type of formation pocket may be associated with the proximal portion of the anvil corresponding to the initial stage of firing of the surgical instrument, and a second type of formation pocket corresponding to the firing stage subsequent to the initial stage of firing. A third type of formed pocket may be associated with the third and final stages of firing, following the intermediate and early stages of firing. Pockets may be strategically placed on the anvil to enhance the overall performance of the pocket. For example, one type of forming pocket may form taller staples more consistently and generally better than forming shorter staples, or vice versa. In another example, in a cartridge having multiple staples with different diameters, it may be advantageous to have forming pockets in the cartridge that form staples with smaller diameters that form staples with smaller diameters, as well It may be advantageous to have forming pockets in the cartridge that form staples with larger diameter staples that form larger staples.

Referring now to FIG. 134, shown is a table 12000 identifying characteristics of various forming pocket arrangements. The table identifies features for forming pocket array 10100 and forming pocket array 10200. The table also identifies features of other formed pocket arrays tested in a finite element analysis environment that may be similar in many respects to formed pocket arrays 10100, 10200. Formed pocket sequences A 1 , A 2 are similar to formed pocket sequence 10100 and formed pocket sequences B 1 , B 2 are similar to formed pocket sequence 10200 . Table 12000 also identifies features of forming pocket array 12100 .

Referring also to FIG. 135, features 12001, 12003, 12005, 12007 and 12009 are referenced with respect to some of the forming pocket arrangements identified in Table 12000, as well as alternative forming pocket arrangements according to at least one embodiment. From top to bottom in FIG. 135, cross-sectional views of formed pocket array 10100, formed pocket array 12100, formed pocket array 10200, and formed pocket array 10400 are shown. Feature 12001 represents the longitudinal entry radius of each formed pocket. Feature 12003 represents the longitudinal exit radius of each formed pocket. Feature 12005 represents the distance between the valleys of the forming pocket pair. In other words, feature 12005 represents the distance between the deepest points of the pockets in each formed pocket array. Feature 12007 represents the width of the ridges or bridges of each formed pocket array. Feature 12009 represents the depth of the ridges or bridges of each forming pocket array.

FIG. 136 shows three forming pocket sequences 10100, 10200, 10400 and corresponding staples 10100', 10200', 10400' formed with forming pocket sequences 10100, 10200, 10400, respectively. Pocket arrangement 10200 requires at least an amount of force to fully form staples 10200'. In other words, the maximum force required to form staple 10200' with forming pocket arrangement 10200 is the maximum force required to form the other staples 10100', 10400' with forming pocket arrangement 10100, 10400. less than the maximum force This can be advantageous in that minimizing the overall staple firing force can minimize stress and strain on other components within the surgical stapling assembly. By minimizing mechanical stress and strain, the likelihood of premature failure of the element can be reduced. Reducing the required firing force can also contribute to reducing the size of the shaft diameter by requiring smaller parts that do not need to be powerful. Firing member buckling is a well-recognized problem, for example, when attempting to minimize the size of the shaft diameter.

FIG. 137 is a table 12200 identifying certain additional features of various forming pocket arrangements, as described above. Column 12201 identifies various maximum forces for fully forming staples with different forming pocket arrangements. Column 12203 identifies various maximum forces for overdriving firing of staples with different forming pocket arrangements.

FIG. 138 shows staples 12301 in a B forming configuration 12300 and in an overdrive configuration 12300' formed in forming pocket arrangement 10100. FIG. Staple 12301 , for example, comprises staple base 12302 and a pair of staple legs 12303 extending from staple base 12302 . Each staple leg 12303 includes a staple tip 12304 configured to contact the forming pocket when the staple 12301 is driven toward the anvil of the surgical instrument. The staple 12301 includes various bending regions or sections 12305, 12306 that can bend into predictable bending contours when formed with specific forming pocket arrangements. Forming pocket arrangement 10100 bends bend regions 12305, 12306 into distinct contours. A fully formed configuration staple 12301, for example, comprises a box-like structure rather than a continuously formed structure. Bent regions 12305, 12306 comprise sharp bends. As a result, there is a significant gap distance 12307 between bent portions 12306 of legs 12303 . Additionally, the gap distance 12308 between the tips 12304 of the legs 12303 is significant. In various tissue fastening scenarios, these gaps 12307, 12308 between the bent portion 12606 and the staple tip 12304 are less effective at sealing tissue.

The force F required to form staple 12301 with forming pocket arrangement 10100 is shown in graph 12310 of FIG. The force profile includes specific regions and peaks 12302,12303,12304,12305,12306. Initial peak 12302 represents a tip strike or tip contact with its corresponding forming pocket. Leg 12303 then buckles and begins bending at flexion region 12306 once the staple tip hits the pocket and is anchored in the exit region of the pocket. These bends in bend region 12306 correspond to portion 12313 of graph 12310 . The leg 12303 then progresses to a second buckling stage once the flexion region 12306 is fully formed or nearly formed and the flexion region 12306 contacts the entrance region forming surface of the pocket. Once flexion region 12306 contacts the forming pocket, leg 12303 can buckle flexion region 12325 forming into a B-shape. This second buckling stage produces a second force peak 12314 .

If the staple 12301 is formed in its B formed configuration 12300 or higher, the staple is in the overdrive configuration 12300'. This can occur for various reasons. One reason may be that the staples 12301 are lifted above the deck of the staple cartridge to fully eject the staples 12301 from the staple cartridge. For overdrive configuration 12300' of staple 12301, gap 12308 is significantly increased in distance between staple tips 12304. FIG. Additionally, legs 12303 of staple 12301 begin to create an additional overdrive bend region between staple base 12302 and bend region 12305 . If this region is flexed, the staple height formed can be reduced, thereby contributing to a weaker tissue sealing effect. Additionally, a curved "B" of staple leg 12303 can occur if this area is bent. This curvature "B" includes a width that, if increased, may cause the staple 12301 to seal tissue with less force. Referring to graph 12310 , second force peak 12316 represents the force required to overdrive staple 12301 . This force is significantly greater than the force required to B-shape staple 12301 at peak 12314 .

FIG. 139 shows staples 12321 in a B forming configuration 12320 and in an overdrive configuration 12320' formed in forming pocket arrangement 10200. FIG. Staple 12321 , for example, comprises staple base 12322 and a pair of staple legs 12323 extending from staple base 12322 . Each staple leg 12323 includes a staple tip 12324 configured to contact a corresponding formation pocket when the staple 12321 is driven toward the anvil of the surgical instrument. The staple 12321 includes various bending regions or sections 12325, 12326 that can bend into predictable bending profiles when formed with specific forming pocket arrangements. Forming pocket arrangement 10200 bends bending regions 12325 , 12326 into a more continuous profile than bending regions 12305 , 12306 of staple 12301 formed in forming pocket arrangement 10100 . In other words, the staples 12321 in the B formed configuration have a profile that more closely resembles the actual "B" staple configuration than the fully formed individual bent configuration of the staples 12301 . Bend regions 12325, 12326 include a greater bending radius of curvature than bend regions 12305, 12306. FIG. As a result, gap distance 12327 between bent portions 12326 of legs 12323 is less than gap distance 12307 . Further, gap distance 12328 between tips 12324 of legs 12323 is less than gap distance 12308 . In various tissue fastening scenarios, a smaller gap 12327, 12328 between the bent portion 12626 and the staple tip 12324 can help in sealing tissue with greater efficacy than the staple 12301. Minimizing these gap distances can increase the tissue capturing ability of the staples 12321 .

The force F required to form staple 12321 with forming pocket arrangement 10200 is shown in graph 12330 of FIG. The force profile includes specific regions 12333,12335 and peaks 12332,12334,12336. Initial peak 12332 represents a tip strike or tip contact with its corresponding forming pocket. Leg 12323 then buckles and begins bending at flexion region 12326 once the staple tip hits the pocket and is anchored in the exit region of the pocket. The bends in these bend regions 12326 correspond to portion 12333 of graph 12330 . The leg 12323 then undergoes a second buckling once the flexion region 12326 is fully formed or nearly formed and the flexion region 12326 contacts and slides within the entry region forming surface of the pocket. proceed step by step. Once flexion region 12326 contacts the forming pocket, leg 12323 can buckle flexion region 12305 forming into a B-shape. This second buckling stage produces a second force peak 12334 . Compared to staples 12301, staples 12321 formed in forming pocket arrangement 10200 require less force to fully form.

When a staple 12321 is formed in its B formed configuration 12320 or higher, it may be referred to as an overdrive configuration 12320'. For the overdrive configuration 12320' of the staple 12321, the gap distance 12328 is increased in the distance between the staple tips 12304, but the gap is less than the gap between the tips 12304 of the staple 12301 in that overdrive configuration 12300'. , is not valid. The gap distance 12327 between bending regions 12326 is reduced. Additionally, legs 12323 of staple 12321 begin to form an additional overdrive bend region between staple base 12322 and bend region 12325 . However, compared to staple 12301, the curvature "B" of staple leg 12323 is less than the curvature "B" of staple leg 12303 in its overdrive configuration 12300'. Referring to graph 12330 of FIG. 139, another force peak 12336 represents the force required to overdrive staple 12321. FIG. Force 12336 is similar to force 12334 required to form staple 12301 into a B-shape. As a result, the force that fires staples 12321 in overdrive is not as important to the rest of the instrument as the force that fires staples 12301 in overdrive.

Formed pocket array 10100 and staples 12301 are formed at tip strike stage 12400, first bending stage 12400', second bending stage 12400'', and B or fully formed stage 12400''' in FIGS. 141. During the tip strike stage 12400, the legs of the staple 12301 are configured to buckle into the first bending stage 12400'. After buckling, the leg forms a first bending region. The leg is configured to buckle a second time when the first bending region contacts the formed pocket and transitions to a second bending stage 12400″. After the second buckling, the leg is It is bent again to generate a second bend region.The staple 12301 then finishes forming and desirably obtains a fully formed stage 12400'''. As seen in FIG. 141, the fully formed stage 12400''' shows staples 12301 with individually flexed legs.

Formed pocket array 10200 and staples 12321 are shown in FIGS. 142 and 143 in tip strike stage 12500, first bending stage 12500′, second bending stage 12500″, and fully formed stage 12500′″. It is During the tip strike stage 12500, the legs of the staple 12501 are configured to buckle into the first bending stage 12500'. After buckling, the leg forms a first bending region. The first bend region of staple 12321 includes a greater radius of curvature than the first bend region of staple 12301 . The leg is configured to buckle a second time when the first bending region contacts the forming pocket and changes to a second bending stage 12500″. After the second buckling, the leg is It is bent again to generate a second bend region The second bend region of staple 12321 includes a larger radius of curvature than the second bend region of staple 12301. The bend region of staple 12321 is the bend of staple 12301. Because it includes a larger radius of curvature than the region, the legs of staple 12321 include staple legs that are formed more continuously. Step 12500''' is obtained. As seen in FIG. 143, fully formed stage 12500′″ shows staple 12321 with more continuously formed staple legs than staple 12301. also closely resembles the true 'B' formation.

Compared to staple 12301 and its corresponding formed pocket arrangement 10100, staple 12321 is formed with a lesser tissue path or footprint than staple 12301. A large tissue path footprint can cause excessive tissue stretching and/or tearing during staple formation. Legs 12323 form the path of tips 12324 and are closer to the path of tips 12324 than legs 12303 and tips 12304 because of the more continuous curvature of the formed staple 12321 profile.

Figures 144 and 145 show staples 12301, 12321 being formed from their tip strike stage to a partially formed stage. This partially formed stage is also referred to as the tip strike stage. As seen in FIG. 144, legs 12303 are configured to buckle to form flexion regions 12306 . The load experienced by leg 12303 when formed with formed pocket arrangement 10100 includes a first eccentricity. As seen in FIG. 145, legs 12323 are configured to buckle to form flexion regions 12326 . The load experienced by leg 12323 when formed with formed pocket arrangement 10200 includes a second eccentricity. The second eccentricity is greater than the first eccentricity because of the different pocket shapes of the formed pocket arrangements 10100, 10200. This relationship gives rise to different deflection positions. For example, leg 12303 bends a distance D1 from reference point D in bending region 12306 . Leg 12323 is deflected from reference point D by a distance D2 in bending region 12326 . Distance D2 is less than distance D1. The reduced deflection or bend region 12326 causes the leg 12323 to buckle and form with a larger radius of curvature, resulting in a more continuously formed staple leg.

146-153, the formation of staples formed with the various forming pocket arrangements described above will now be described. The staples are not in constant contact with their respective forming pockets while in alignment. It may be advantageous to provide a formation pocket arrangement that can combat staple misformation when the staple does not align with its corresponding formation pocket during formation.

146 shows side view 12700 and bottom view 12700' of staple 12701 in the fully formed configuration formed with forming pocket arrangement 10200. FIG. However, this staple 12701 was not aligned with the pocket axis 10203 of the forming pocket array 10200 during the forming process. Staple 12701 was driven out of plane with respect to pocket axis 10203 . The tip 12704 did not hit the forming pocket array 10200 along the pocket axis 10203 and did not hit the crown or base 12702 of the staple 12701 which was aligned with the pocket axis 10203 during forming.

Staple 12701 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. The tips 12704 are configured to traverse the first tip alignment axis TA1 so that they overlap or intersect each other. The fully formed position of tip 12704 defines a second tip alignment axis TA2. This axis can be defined as an axis parallel to the crown alignment axis CA defined by the crowns 12702 and aligned with the average point between the tips 12704 . Minimizing the distance between the crown alignment axis CA and the second tip alignment axis TA2 is such that the closer these axes are to each other, the more effective the tissue capture and/or sealing ability of the staple 12701. It can be advantageous in that

147 is a comparison of staple 12701 and formed pocket arrangement 10200 of FIG. 146 with staple 12801 formed with formed pocket arrangement 10100. FIG. As can be seen from FIG. 146, the distance between the second tip alignment axis TA2 of the staple 12801 and the crown alignment axis CA is the distance between the second tip alignment axis TA2 of the staple 12701 and the crown position. greater than the distance between it and the alignment axis CA. Additionally, the tips 12804 of the staples 12801 do not overlap in this misalignment formation scenario of the staples 12801 . Staples 12801 were formed on a path 12805 directed away from the crown alignment axis CA, while staples 12701 were formed on a path 12705 more aligned with the crown alignment axis CA.

FIG. 148 shows side view 12900 and bottom view 12900' of staple 12901 in the fully formed configuration formed with forming pocket arrangement 10400. FIG. However, this staple 12901 was not aligned with the pocket axis 10403 of the forming pocket array 10400 during the forming process. Staple 12901 was driven out of plane with respect to pocket axis 10403 . The tips 12904 did not hit the forming pocket array 10400 along the pocket axis 10403, nor did they hit the crowns or bases 12902 of the staples 12901 aligned with the pocket axis 10403 during forming.

Staple 12901 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. The tips 12904 are configured to partially and/or completely traverse the first tip alignment axis TA1 and thus partially intersect each other. The fully formed position of tip 12904 defines a second tip alignment axis TA2. This axis can be defined as an axis parallel to the crown alignment axis CA defined by the crowns 12902 and aligned with the average point between the tips 12904 . Minimizing the distance between the crown alignment axis CA and the second tip alignment axis TA2 is such that the closer these axes are to each other, the more effective the tissue capturing and/or sealing ability of the staple 12901. It can be advantageous in that As compared to forming pocket arrangement 10200 of FIG. 146, for example, the narrowly spaced exit walls and/or strongly angled exit walls of forming pocket arrangement 10400 encourage the legs of the staples and their crowns. It can be formed closer to the part. In other words, forming pocket array 10400 can promote planar forming, at least in the event of misalignment.

149 shows side view 13000 and bottom view 13000' of staple 13001 in the fully formed configuration formed with forming pocket arrangement 10300. FIG. However, this staple 13001 was not aligned with the pocket axis 10303 of the forming pocket array 10300 during the forming process. Staple 13001 was driven out of plane with respect to pocket axis 10303 . The tips 13004 did not hit the forming pocket array 10300 along the pocket axis 10303, nor did they hit the crowns or bases 13002 of the staples 13001 which were aligned with the pocket axis 10303 during forming.

Staple 13001 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. The legs 13003 are configured such that the legs are formed in a position that is at least substantially aligned with the first tip alignment axis TA1. In some cases, the tip 13004 and/or the legs may contact each other during formation, which may prevent the legs 13003 from crossing the first tip alignment axis TA1. The fully formed position of tip 13004 defines a second tip alignment axis TA2. This axis can be defined as an axis parallel to the crown alignment axis CA defined by the crowns 13002 and aligned with the mean point between the tips 13004 . Minimizing the distance between the crown alignment axis CA and the second tip alignment axis TA2 is such that the closer these axes are to each other, the more effective the tissue capture and/or sealing ability of the staple 13001. It can be advantageous in that As compared to forming pocket arrangement 10200 of FIG. 146, for example, the narrowly spaced exit walls and/or strongly angled exit walls of forming pocket arrangement 10300 encourage the legs of the staples and their crowns. It can be formed closer to the part. In other words, forming pocket array 10300 can promote planar forming in the event of misalignment.

150 and 151 show staples formed in forming pocket array 10500 with one staple aligned with pocket axis 10503 of forming pocket array 10500 and the other staple aligned with pocket axis 10503 of forming pocket array 10500. Not aligned. FIG. 150 shows side view 13100 and bottom view 13100' of staple 13101 in the fully formed configuration formed with forming pocket arrangement 10500. FIG. This staple 13101 was aligned with the pocket axis 10503 of the forming pocket array 10500 during the forming process. Tip 13104 struck formed pocket array 10500 along pocket axis 10503 .

Staple 13101 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. When aligned with pocket axis 10503, staple 13101 is formed such that second tip alignment axis TA2 and crown alignment axis CA are substantially aligned, or in other words: Staple 13101 is considered to have a substantially planar shape. The force causing staple 13101 to fire is shown in graph 13110 .

151 shows side view 13120 and bottom view 13120' of staple 13121 in the fully formed configuration formed with forming pocket arrangement 10500. FIG. This staple 13121 was not aligned with the pocket axis 10503 of the forming pocket array 10500 during the forming process. Staple 13121 was driven out of plane with respect to pocket axis 10503 . The tips 13124 did not hit the forming pocket array 10500 along the pocket axis 10503, nor did they hit the crowns or bases 13122 of the staples 13121 that were aligned with the pocket axis 10503 during forming.

Staple 13121 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. When not aligned with pocket axis 10503, staple 13121 is formed such that second tip alignment axis TA2 and crown alignment axis CA are substantially aligned with each other, or in other words: The staple 13121 has a substantially planar shape. 150, in which the staple 13101 is aligned with the pocket axis 10503, the staple 13121 allows the surgeon to push the tissue more than staples formed with other formed pocket arrangements formed in a non-aligned state. Formed into a fully formed configuration that may allow for proper sealing.

152 and 153 show staples formed in the forming pocket array 11000, one staple aligned with the pocket axis 11003 of the forming pocket array 11000 and the other staple aligned with the pocket axis 11003 of the forming pocket array 11000. Not aligned. FIG. 152 shows side view 13200 and bottom view 13200' of staple 13201 in the fully formed configuration formed with forming pocket arrangement 11000. FIG. This staple 13201 was aligned with the pocket axis 11003 of the forming pocket array 11000 during the forming process. The tip 13204 struck the formed pocket array 11000 along the pocket axis 11003 .

Staple 13201 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. When aligned with pocket axis 11003, staple 13101 is formed such that second tip alignment axis TA2 and crown alignment axis CA are substantially aligned, but axes TA2, CA are aligned. Also, they are non-parallel. One leg 13204 is formed on one side of crown 13203 and the other leg 13204 is formed on the opposite side of crown 13203 . The force causing staple 13201 to fire is shown in graph 13210 . It can be seen in graph 13210 that the forces that fire staples 13201 do not include two distinct and substantial force peaks, as in the graphs associated with other formation pocket arrangements discussed above. The staples 13201 are configured to simultaneously contact multiple points of the pockets of the forming pocket array 11000 during forming. This double tangential contact with the forming pocket can help reduce sticking of the staple tips and/or legs and the force that causes the staples 13201 to fire.

FIG. 153 shows side view 13220 and bottom view 13220' of staple 13221 in the fully formed configuration formed with forming pocket arrangement 11000. FIG. This staple 13221 was not aligned with the pocket axis 11003 of the forming pocket array 11000 during the forming process. Staple 13221 was driven out of plane with respect to pocket axis 11003 . The tips 13224 did not hit the forming pocket array 11000 along the pocket axis 11003, nor did they hit the crowns or bases 13222 of the staples 13221 that were aligned with the pocket axis 11003 during forming.

Staple 13221 includes a first tip alignment axis TA1, a second tip alignment axis TA2, and a crown alignment axis CA. When not aligned with pocket axis 11003, staple 13221 is formed such that second tip alignment axis TA2 and crown alignment axis CA are substantially aligned with each other, or in other words: The staple 13221 has a substantially planar shape. Axes TA2, CA are parallel. 152, where the staple 13201 is aligned with the pocket axis 11003, the staple 13221 allows the surgeon to push the tissue more than staples formed with other formed pocket arrangements formed in a non-aligned state. Formed into a fully formed configuration that may allow for proper sealing. The force causing staple 13221 to fire is shown in graph 13230 . Similar to staple 13201, as in the graphs associated with the other forming pocket arrangements described above, the force firing staple 13201 does not include two distinct and substantial force peaks.

Still referring to FIG. 153, a cross-section of forming pocket 11030 of forming pocket array 11000 is shown with staple profiles 11041, 11042, 11043 of varying diameters. Staples of various sizes are configured to be formed with forming pocket array 11000 . Larger staple diameters can provide double tangential contact with the forming pocket sidewalls, as described above. A smaller diameter staple may provide full contact with the bottom 11035 of the forming pocket 11030 during forming.

By having grooves formed in the forming surface of the forming pocket, if the staple is not aligned with the forming pocket axis during forming, it will be flatter than staples formed in the forming pocket, especially without grooves formed in the forming pocket. Staples can be prompted to form into. 154 and 155, staple 13301 is shown in a fully formed configuration formed with formed pocket arrangement 10100 (Fig. 154) and staple 13401 is shown formed with formed pocket arrangement 10600 (Fig. 154). 155) in a fully formed configuration. Staples 13301, 13401 were not aligned with their respective pocket axes 10103, 10603 during formation. As seen from the side views 13300, 13400 of the fully formed staples 13301, 13401, the formed surface grooves may not affect the resulting formed configuration in this plane. Referring now to bottom views 13300', 13400' of staples 13301, 13401, staple 13401 includes a flatter, fully formed configuration than staple 13301. The tips 13304 of the staples 13301 can exit the forming pocket array 10100 facing away from the pocket axis 10103 . Legs 13303 of staple 13301 may be formed away from crown 13302 defining a tip formation offset distance 13305 . The tips 13404 of the staples 13401 are urged out of the forming pocket array 10600 along the pocket axis 10603. FIG. Legs 13403 of staples 13401 may be formed in a direction away from crown 13402 that is shorter than these staples 13301 defining a tip forming offset distance 13405 , in which case shorter than tip forming offset distance 13305 .

Example 1 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge containing a plurality of staples, each staple defined by a staple diameter. a stapling assembly comprising a wire and each staple having a staple leg. The stapling assembly further comprises an anvil configured to deform the staple, the anvil comprising a tissue-engaging surface and a pair of forming pockets defined in the planar surface, the pair of forming pockets extending through the staple. configured to deform the staple legs of the The pair of forming pockets includes a proximal forming pocket including forming surfaces and a distal forming pocket, the forming surfaces including an entry region including a first radius of curvature and an exit region including a second radius of curvature. , the first radius of curvature and the second radius of curvature comprise a ratio of 1.5:1 to 3:1, and the first radius of curvature is 8 to 10 times greater than the staple diameter.

Example 2 - The stapling assembly of Example 1, wherein the ratio is about 2:1.

Example 3 - The stapling assembly of Example 1 or 2, wherein the first radius of curvature is about nine times greater than the staple diameter.

Example 4 - The stapling assembly of Examples 1, 2 or 3, wherein the second radius of curvature is 4 to 6 times greater than the staple diameter.

Example 5 - The stapling assembly of Example 1, 2, 3 or 4, wherein the second radius of curvature is about 4.5 times greater than the staple diameter.

Example 6 - Example 1, 2, 3, 4 or wherein a pair of forming pockets define a ridge therebetween, the ridge comprising a ridge width, and the ridge width being less than the staple diameter 6. The stapling assembly of claim 5.

Example 7 - The stapling assembly of Examples 1, 2, 3, 4, 5 or 6, wherein the staple diameter is between 0.0079 inches and 0.0094 inches.

Example 8 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge containing a plurality of staples, each staple extending from a staple base. A stapling assembly comprising a residing pair of staples and wherein the staple base includes a staple base length. The staple assembly further comprises an anvil configured to deform the staple. The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface, the pair of forming pockets configured to deform the legs of the staple. The pair of forming pockets includes a proximal forming pocket including forming surfaces and a distal forming pocket, the forming surfaces including an entry region including a first radius of curvature and an exit region including a second radius of curvature. , the first radius of curvature and the second radius of curvature comprise a ratio of 1.5:1 to 3:1, and the first radius of curvature is greater than about 0.6 times the staple base length.

Example 9 - The stapling assembly of Example 8, wherein the ratio is about 2:1.

Example 10 - The stapling assembly of Example 8 or 9, wherein each staple includes a staple diameter and the first radius of curvature is 8 to 10 times greater than the staple diameter.

Example 11 - The stapling assembly of Example 8, 9 or 10, wherein each staple includes a staple diameter and the first radius of curvature is about nine times greater than the staple diameter.

Example 12 - The stapling assembly of Example 8, 9, 10 or 11, wherein each staple includes a staple diameter and the second radius of curvature is 4 to 6 times greater than the staple diameter.

Example 13 - The stapling assembly of Example 8, 9, 10, 11 or 12, wherein each staple includes a staple diameter and the second radius of curvature is about 4.5 times greater than the staple diameter.

Example 14 - Each staple includes a staple diameter, a pair of forming pockets define a ridge therebetween, the ridge includes a ridge width, and the ridge width is less than 1 times the staple diameter , Example 8, 9, 10, 11, 12 or 13.

Example 15 - The stapling assembly of Example 8, 9, 10, 11, 12, 13 or 14, wherein the staple diameter is between 0.0079 inches and 0.0094 inches.

Example 16 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a fastener cartridge containing a plurality of fasteners, each fastener having a wire diameter and each fastener having a fastener leg. The stapling assembly further comprises an anvil configured to deform the fastener. The anvil includes a tissue engaging surface and first and second fastener forming features defined at the tissue engaging surface, the first and second fastener forming features deforming legs of the fastener. configured as The first and second fastening formation features comprise a first formation feature including a formation surface and a second formation feature, the formation surface including an entrance region including a first radius of curvature and a second radius of curvature. wherein the first radius of curvature and the second radius of curvature comprise a ratio of 1.2:1 to 3.3:1, and the first radius of curvature is greater than the wire diameter by about 7 to about 11 times larger.

Example 17 - The stapling assembly of Example 16, wherein the ratio is about 2:1.

Example 18 - The stapling assembly of Example 16 or 17, wherein the first radius of curvature is about nine times greater than the wire diameter.

Example 19 - The stapling assembly of Example 16, 17 or 18, wherein the second radius of curvature is about 4 to about 6 times greater than the wire diameter.

Example 20 - The stapling assembly of Example 16, 17, 18 or 19, wherein the second radius of curvature is 4.5 times greater than the wire diameter.

Example 21 - The first and second fastener forming features define a central portion therebetween, the central portion including a width, and the width being less than the wire diameter, Examples 16, 17, 18 , 19 or 20.

Example 22 - The stapling assembly of Example 16, 17, 18, 19, 20 or 21, wherein the staple diameter is between 0.0075 inch and 0.0098 inch.

Example 23 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge comprising a plurality of staples. The staple assembly further comprises an anvil configured to deform the staple. The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface and aligned along a longitudinal pocket axis, the pair of forming pockets deforming corresponding staple legs. configured to allow The pair of forming pockets comprises a proximal forming pocket including forming surfaces, the forming surfaces having an entrance region including a first radius of curvature and an exit region including a second radius of curvature, and the first curvature. The radius and the second radius of curvature are different and a pair of sidewalls extend between the forming surface and the tissue engaging surface. Each sidewall has a first discrete sidewall portion defining a first plane oriented at a first angle with respect to the tissue engaging surface and a second angle with respect to the tissue engaging surface. A second distinct sidewall portion defining a second plane, wherein the first angle and the second angle are different. The pair of forming pockets further includes a distal forming pocket.

Example 24 - The stapling assembly of Example 23, wherein the second plane is angled with respect to the longitudinal pocket axis.

Example 25 - The stapling assembly of Example 23 or 24, wherein the second angle is greater than the first angle.

Example 26 - The stapling assembly of Examples 23, 24, or 25, wherein the second angle is between 80 degrees and 90 degrees.

Example 27 - According to example 23, 24, 25 or 26, wherein each sidewall of the pair of sidewalls further comprises a central sidewall portion extending between the tissue engaging surface and the second discrete sidewall portion. Stapling assembly.

Example 28 - The stapling assembly of Example 23, 24, 25, 26 or 27, wherein the transition between the forming surface and each sidewall of the pair of sidewalls includes a fillet edge.

Example 29 - The stapling assembly of Example 23, 24, 25, 26, 27 or 28, wherein the transition between separate sidewall portions includes a fillet edge.

Example 30 - According to Example 23, 24, 25, 26, 27, 28 or 29, wherein the transition between the separate sidewall portions intersects the forming surface at the transition between the inlet and outlet regions. Stapling assembly.

Example 31 - A pair of forming pockets define a ridge therebetween and the forming surface defines a first end including a first width and a second end including a second width. the second width being less than the first width, the second end defining an edge of the ridge, and the valley being between the first end and the second end 31. A stapling assembly according to example 23, 24, 25, 26, 27, 28, 29, or 30, disposed wherein the valley includes a third width that is less than the second width.

Example 32—The stapling assembly of Example 32, wherein the valley is closer to the second end than to the first end.

Example 33 - The stapling of Example 31 or 32, wherein each staple comprises a staple length, the staple length is between 0.0079 inches and 0.0094 inches, and the third width is greater than 0.0094 inches Assembly.

Example 34 - Examples 23, 24, 25, 26, 27, 28, 29, 30, 31 wherein the first radius of curvature and the second radius of curvature comprise a ratio of 1.5:1 to 3:1 , 32 or 33.

Example 35 - The stapling assembly of Example 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 or 34 wherein the ratio is 2:1.

Example 36 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge comprising a plurality of staples. The staple assembly further comprises an anvil configured to deform the staple. The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface and aligned along a longitudinal pocket axis, the pair of forming pockets deforming corresponding staple legs. configured to allow The pair of forming pockets comprises a proximal forming pocket including a proximal end, a distal end and a forming region. The forming region comprises an entrance region including a first radius of curvature and an exit region including a second radius of curvature, wherein the first radius of curvature and the second radius of curvature are between 1.5:1 and 3:1 and a groove extends between the proximal and distal ends. The proximal forming pocket further comprises a pair of concave sidewalls extending between the forming region and the tissue engaging surface, the distance between the concave sidewalls at the proximal end being equal to the distance between the concave sidewalls at the distal end. greater than the distance between The pair of forming pockets further includes a distal forming pocket.

Example 37 - The stapling assembly of example 36, wherein each staple comprises a staple leg and the forming pocket is configured to encourage the staple legs to contact one another as the staples are deformed. Three-dimensional.

Example 38 - The stapling of example 36 or 37, wherein the pair of forming pockets define a ridge therebetween, the ridge comprising a surface that is at least substantially parallel to the tissue engaging surface Assembly.

Example 39 - The stapling assembly of example 36, 37 or 38, wherein the distal forming pocket comprises a proximal end, a distal end and a forming region. The forming region comprises an entrance region including a first radius of curvature and an exit region including a second radius of curvature, wherein the first radius of curvature and the second radius of curvature are between 1.5:1 and 3:1 and a groove extends between the proximal and distal ends. The distal forming pocket further comprises a pair of concave sidewalls extending between the forming region and the tissue engaging surface, the distance between the concave sidewalls at the proximal end being equal to the distance between the concave sidewalls at the distal end. greater than the distance between, the distal pocket groove and the proximal pocket groove are not parallel to the longitudinal pocket axis, and the distal pocket groove and the proximal pocket groove are parallel to each other.

Example 40 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge comprising a plurality of staples. The staple assembly further comprises an anvil configured to deform the staple. The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface and aligned along a longitudinal pocket axis, the pair of forming pockets deforming corresponding staple legs. configured to allow The pair of forming pockets comprises a proximal forming pocket including forming surfaces, the forming surfaces having an entrance region including a first radius of curvature and an exit region including a second radius of curvature, and the first curvature. The radius and the second radius of curvature are different such that the pair of inlet region sidewalls are oriented at a first angle relative to the tissue engaging surface and the pair of outlet region sidewalls are oriented at a second angle relative to the tissue engaging surface. and the first angle is less than the second angle. The pair of forming pockets further includes a distal forming pocket.

Example 41 - The stapling assembly of Example 40, wherein the first radius of curvature and the second radius of curvature comprise ratios of 1.5:1 and 3:1.

Example 42 - The stapling assembly of Example 40 or 41, wherein the second angle is 90 degrees.

Example 43 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge comprising a plurality of staples, each staple including a staple diameter. The staple assembly further comprises an anvil configured to deform the staple. The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface, the pair of forming pockets configured to deform corresponding staple legs. The pair of forming pockets includes a proximal forming pocket including a forming surface, the forming surface having an entry region including a first radius of curvature and an exit region including a second radius of curvature, wherein tissue engagement is achieved from the forming surface. A pair of sidewalls extending at an angle toward the mating surface and a groove defined in the forming surface, the groove including a diameter less than the staple diameter. The pair of forming pockets further includes a distal forming pocket.

Example 44 - The stapling assembly of example 43, wherein the groove is located only in the exit region.

Example 45 - The stapling assembly of example 43 or 44, wherein the groove comprises two longitudinal edges configured to provide double tangential contact between each longitudinal edge and the staple three-dimensional.

Example 46 - The stapling assembly of Example 43, 44 or 45, wherein the groove and forming surface include a fillet transition between the groove and forming surface.

Example 47 - The stapling assembly of Example 43, 44, 45 or 46, wherein the pair of forming pockets define a longitudinal pocket axis and wherein the pair of forming pockets are bilaterally symmetrical about the longitudinal pocket axis Three-dimensional.

Example 48 - The stapling assembly of Example 43, 44, 45 or 46, wherein the pair of forming pockets define a longitudinal pocket axis and wherein the pair of forming pockets are bilaterally asymmetrical with respect to the longitudinal pocket axis three-dimensional.

Example 49 - The stapling assembly of example 43, 44, 45, 46, 47 or 48, wherein the groove does not intersect the longitudinal pocket axis.

Embodiment 50 - The groove includes a first portion located on a first side of the longitudinal pocket axis and a second portion located on a second side of the longitudinal pocket axis, the groove comprising the longitudinal pocket 49. A stapling assembly according to example 43, 44, 45, 46, 47 or 48, which is cross-axis.

Example 51 - The stapling assembly of Example 43, 44, 45, 46, 47, 48, 49 or 50, wherein the first radius of curvature and the second radius of curvature are different.

Example 52 - according to Example 43, 44, 45, 46, 47, 48, 49, 50, or 51, wherein each staple comprises a staple diameter, and wherein the staple diameter is from 0.0079 inches to 0.0094 inches Stapling assembly.

Example 53 - The staple of Example 43, 44, 45, 46, 47, 48, 49, 50, 51 or 52, wherein the groove comprises a diameter less than 0.0094 inches but greater than 0.0079 inches clasp assembly.

Example 54 - The stapling assembly of example 43, 44, 45, 46, 47, 48, 49, 50, 51 or 52, wherein the groove comprises a diameter of less than 0.0079 inches.

Example 55 - Example 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53 or 54, wherein the groove extends from part of the inlet region through part of the outlet region A stapling assembly as described in .

Example 56 - Examples 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54 or wherein the groove extends from a portion of the inlet region through the entire outlet region 55. The stapling assembly according to 55.

Example 57 - The forming surface comprises a proximal end and a distal end, and the groove comprises a first diameter at the proximal end and a second diameter at the distal end, and a second width is greater than the first width.

Example 58 - Comprising a first jaw, a second jaw movable relative to the first jaw, and a staple cartridge comprising a plurality of staples, each staple comprising a wire having a wire diameter, A stapling assembly, each staple also comprising a staple leg and an anvil configured to deform the staple. The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface, the pair of forming pockets configured to deform the legs of the staple. The pair of forming pockets includes a proximal forming pocket including a forming surface, the forming surface having an entry region including a first radius of curvature and an exit region including a second radius of curvature, the forming surface and the tissue engagement. A pair of sidewalls extending between the mating surfaces and a tip control channel defined in the forming surface, the tip control channel defining a tip control axis and the tip control channel having a diameter less than the wire diameter. include. The pair of forming pockets further includes a distal forming pocket.

Example 59 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, a staple cartridge comprising a plurality of staples, and an anvil configured to deform the staples . The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface, the pair of forming pockets configured to deform corresponding staple legs. A pair of forming pockets includes a longitudinal pocket axis, a proximal forming pocket and a distal forming pocket. The proximal forming pocket comprises an entry region including a first radius of curvature, an exit region including a second radius of curvature, and a tip control channel defined within the forming surface, the tip control channel A tip control axis is defined, and the tip control axis and the longitudinal pocket axis are non-parallel.

Example 60 - The stapling assembly of Example 59, wherein the distal forming pocket comprises a forming surface comprising an entry region comprising a first radius of curvature and an exit region comprising a second radius of curvature. The distal forming pocket further comprises a tip control channel defined in the forming surface, the tip control channel defining a tip control axis, and the tip control axes being parallel.

Embodiment 61 - The tip control axis of the tip control channel of the proximal forming pocket is located on a first side of the longitudinal pocket axis, and the tip control axis of the tip control channel of the distal forming pocket is: 61. A stapling assembly according to example 60, located on the second side of the longitudinal pocket axis.

Example 62 - The proximal and distal forming pockets define a bridge portion therebetween, and the bridge portion is angled with respect to the longitudinal pocket axis, Example 59, 60 or 61 A stapling assembly as described in .

Example 63 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, a staple cartridge comprising a plurality of staples, and an anvil configured to deform the staples . The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface, the pair of forming pockets configured to deform corresponding staple legs. The pair of forming pockets includes a longitudinal pocket axis, an intermediate axis including a center point, a proximal forming pocket, and a distal forming pocket, the pair of forming pockets being bilaterally symmetrical with respect to the longitudinal pocket axis and a pair of The forming pockets are bilaterally asymmetric with respect to the intermediate axis, and the pair of forming pockets are rotationally asymmetric with respect to the center point.

Example 64 - A proximal forming pocket comprises a proximal pocket forming surface including a proximal pocket entry region and a proximal pocket exit region, the proximal pocket entry region including a first radius of curvature, and a proximal pocket exit the region includes a second radius of curvature, the first radius of curvature and the second radius of curvature being different, the first radius of curvature and the second radius of curvature defining a first curvature ratio; The forming pocket comprises a distal pocket forming surface including a distal pocket entry region and a distal pocket exit region, the distal pocket entry region including a third radius of curvature, and the distal pocket exit region having a fourth curvature. a radius, wherein a third radius of curvature and a fourth radius of curvature are different, the third radius of curvature and the fourth radius of curvature define a second curvature ratio; 64. The stapling assembly of Example 63, wherein the curvature ratios of are different.

Example 65 - A proximal forming pocket comprises a proximal pocket forming surface including a proximal pocket entry region and a proximal pocket exit region, the proximal pocket entry region including a first radius of curvature and a proximal pocket exit region includes a second radius of curvature, the first radius of curvature and the second radius of curvature are different, the first radius of curvature and the second radius of curvature define a first curvature ratio, and the distal formation The pocket comprises a distal pocket forming surface including a distal pocket entry region and a distal pocket exit region, the distal pocket entry region including a third radius of curvature and the distal pocket exit region having a fourth radius of curvature. wherein the third radius of curvature and the fourth radius of curvature are different, the third radius of curvature and the fourth radius of curvature defining a second curvature ratio, the first radius of curvature and the third radius of curvature 64. The stapling assembly of example 63, wherein the radii are different, the second radius of curvature and the fourth radius of curvature are different, and the first curvature ratio and the second curvature ratio are the same.

Example 66 - The proximal formation pocket comprises a proximal pocket formation surface, the proximal pocket formation surface comprises a proximal pocket valley depth, the distal formation pocket comprises a distal pocket formation surface, the distal pocket formation 66. A stapling assembly according to example 63, 64, or 65, wherein the surface includes a distal pocket valley depth, and wherein the proximal and distal pocket valley depths are different.

Example 67 - The stapling assembly of Example 66, wherein the proximal pocket valley depth is greater than the distal pocket valley depth.

Example 68 - A pair of sculpting pockets define an intermediate reference point between the proximal sculpting pocket and the distal sculpting pocket, and the intermediate datum point is between the proximal end of the proximal sculpting pocket and the distal sculpting pocket 68. A stapling assembly according to example 63, 64, 65, 66 or 67, positioned at a center point defined between the distal end of the .

Example 69 - A pair of sculpting pockets define an intermediate reference point between a proximal sculpting pocket and a distal sculpting pocket, and the intermediate datum point is between the proximal end of the proximal sculpting pocket and the distal sculpting pocket 68. A stapling assembly according to example 63, 64, 65, 66 or 67, positioned at a point other than the center point defined between the distal end of the .

Example 70 - Example 63 wherein each prep pocket includes an entry area configured to receive a corresponding tip of a staple, and the entry area of the distal prep pocket is greater than the entry area of the proximal prep pocket , 64, 65, 66, 67, 68 or 69.

Example 71 - The stapling assembly of Example 63, 64, 65, 66, 67, 68, 69 or 70, wherein corresponding legs of the staples include equal leg heights.

Example 72 - The proximal forming pocket has a proximal pocket forming surface and a pair of sidewalls extending between the proximal pocket forming surface and the tissue engaging surface at a first angle to the tissue engaging surface wherein the distal forming pocket comprises a distal pocket forming surface and a pair of sidewalls extending between the distal pocket forming surface and the tissue engaging surface at a second angle to the tissue engaging surface. and wherein the first angle is different than the second angle.

Example 73 - The stapling assembly of Example 72, wherein the first angle is less than the second angle.

Example 74 - The proximal forming pocket comprises a proximal pocket forming surface comprising a proximal entry width and a proximal exit width, and the distal forming pocket comprises a distal entry width and a distal exit width 63, 64, 65, 66, 67, 68 with a distal pocket-forming surface comprising a proximal entry width different than a distal entry width, and a proximal exit width different than a distal exit width , 69, 70, 71, 72 or 73.

Example 75 - A proximal forming pocket comprises a proximal pocket forming surface and a pair of separate sidewalls extending between the proximal pocket forming surface and the tissue engaging surface, the distal forming pocket comprising: Examples 63, 64, 65, 66, 67, 68, 69, 70, 71 comprising a distal pocket-forming surface and a pair of separate sidewalls between the distal pocket-forming surface and the tissue engaging surface , 72, 73 or 74.

Example 76 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, a staple cartridge containing a plurality of staples, and an anvil configured to deform the staples . The anvil includes a tissue-engaging surface and a row of forming pockets defined in the tissue-engaging surface, the forming pockets configured to deform corresponding legs of the staple. The row of forming pockets comprises a staple row axis and a first region of forming pocket pairs positioned along a first portion of the staple row axis, wherein the forming pocket pairs in the first region include a first shape. , a second region of forming pocket pairs positioned along a second portion of the staple row axis, wherein the forming pocket pairs in the second region include a second shape, and the first shape comprises a second shape; Different from shape. Each forming pocket pair of the second region comprises a longitudinal pocket axis, an intermediate axis including a center point, a proximal forming pocket and a distal forming pocket, the pair of forming pockets of the second region comprising: , is bilaterally symmetrical about the longitudinal pocket axis, the pair of formed pockets in the second region is bilaterally asymmetrical about the intermediate axis, and the pair of formed pockets is rotationally asymmetrical about the center point. be.

Example 77 - A stapling assembly comprising a first jaw, a second jaw movable relative to the first jaw, a staple cartridge comprising a plurality of staples, and an anvil configured to deform the staples . The anvil includes a tissue-engaging surface and a pair of forming pockets defined in the tissue-engaging surface, the pair of forming pockets configured to deform corresponding staple legs. A pair of forming pockets includes a longitudinal pocket axis, an intermediate axis including a center point, a proximal forming pocket, and a distal forming pocket, the pair of forming pockets being oriented relative to the longitudinal pocket axis and the intermediate axis. Bilateral asymmetry and a pair of molded pockets are rotationally asymmetric about a center point.

Example 78 - The stapling assembly of Example 77, wherein the shape of the proximal preparation pocket and the shape of the distal preparation pocket are the same.

Example 79 - Proximal and distal preparation pockets are each defined in a formation surface and a formation surface extending between a first side of the longitudinal pocket axis and a second side of the longitudinal pocket axis 79. The stapling assembly of example 77 or 78, comprising:

Example 80 - The stapling assembly of Example 79, wherein the proximal forming pocket and the distal forming pocket each include a fillet transition between the groove and the forming surface.

Example 81 - The stapling assembly of Example 79 or 80, wherein each staple includes a staple diameter and the groove includes a diameter less than the staple diameter.

Example 82 - The stapling assembly of Example 79 or 80, wherein each staple includes a staple diameter and the groove includes a diameter greater than the staple diameter.

Although many of the surgical tool systems described herein operate with electric motors, the surgical tool systems described herein can operate in any suitable manner. In various instances, the surgical instrument systems described herein can be operated by, for example, manually operated triggers. In certain cases, the motors disclosed herein may comprise part of a robotic control system. Additionally, any of the end effectors and/or instrument assemblies disclosed herein can be utilized with robotic surgical instrument systems. For example, U.S. patent application Ser. No. 13/118,241, entitled "SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE STABLE DEPLOYMENT ARRANGEMENTS," now U.S. Pat. No. 9,072,535, provides several examples of robotic surgical instrument systems. is disclosed in more detail.

Although the surgical instrument systems described herein are described in connection with the deployment and deformation of staples, the embodiments described herein are not so limited. Various embodiments are also envisioned that deploy fasteners other than staples, such as clamps or tacks. Further, various embodiments are contemplated utilizing any suitable means for sealing tissue. For example, an end effector according to various embodiments can include electrodes configured to heat and seal tissue. Also for example, an end effector according to certain embodiments can apply vibrational energy to seal tissue.

The entire disclosure of the following is incorporated herein by reference.
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Although various devices have been described herein with particular embodiments, modifications and variations may be made to those embodiments. The specified features, structures or properties may be combined in any suitable manner in one or more embodiments. Thus, any particular feature, structure, or characteristic illustrated or described with respect to one embodiment may be combined, without limitation, in whole or in part, with the features, structures, or characteristics of one or more other embodiments. good. Also, although materials are disclosed for particular components, other materials may be used. Further, according to various embodiments, single components may be replaced with multiple components, and multiple components may be replaced with a single component to perform a given function(s). may be replaced. The foregoing description and the following claims are intended to cover all such modifications and variations.

The devices disclosed herein can be designed to be disposed of after a single use, or can be designed to be used multiple times. In either case, however, the device can be reconditioned for reuse after at least one use. Reconditioning can include, but is not limited to, any combination of disassembly of the device, followed by cleaning or replacement of particular parts of the device, and subsequent reassembly of the device. Specifically, the reconditioning facility and/or surgical team can disassemble the device, clean and/or replace certain parts of the device, and then reassemble the device for subsequent use. can be done. Those skilled in the art will appreciate that reconditioning of the device can utilize a variety of techniques for disassembly, cleaning/replacement, and reassembly. Use of such techniques, and the resulting reconditioned device, are all within the scope of the present application.

The devices disclosed herein can be processed pre-operatively. First, a new or used instrument may be obtained and cleaned if necessary. The instrument may then be sterilized. In one sterilization technique, the instrument is placed in a closed and sealed container, such as a plastic bag or TYVEK bag. The container and instrument can then be placed in a radiation field that can penetrate the container, such as gamma rays, X-rays, and/or high-energy electrons. Radiation can kill bacteria on the device and in the container. The sterilized instrument may then be stored in the sterile container. The sealed container can keep the instrument sterile until it is opened in the medical facility. The device may also be sterilized using any other technique known in the art including, but not limited to, beta radiation, gamma radiation, ethylene oxide, hydrogen peroxide plasma, and/or water vapor.

While this invention has been described as having an exemplary design, the present invention may be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles.

All patents, publications, or other disclosures that are incorporated herein in whole or in part by reference to any existing definitions, statements, or other disclosures in which the incorporated material is set forth in this disclosure. It is incorporated herein only to the extent not inconsistent with its content. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting statements incorporated herein by reference. Any content, or portion thereof, that conflicts with the current definitions, opinions, or other disclosures set forth herein, is hereby incorporated by reference, but the reference content and the current disclosure are hereby incorporated by reference. References shall be made only to the extent that there is no inconsistency between

[Mode of implementation]
(1) A stapling assembly comprising:
a first jaw;
a second jaw movable relative to the first jaw;
a staple cartridge containing a plurality of staples;
an anvil configured to deform the staple, comprising:
a tissue engaging surface;
A pair of forming pockets defined in the tissue engaging surface, the pair of forming pockets configured to deform corresponding legs of the staple, the pair of forming pockets comprising:
a longitudinal pocket axis;
an intermediate axis including a center point;
a proximal formation pocket;
a distal forming pocket, wherein the pair of forming pockets are bilaterally symmetrical about the longitudinal pocket axis, the pair of forming pockets is bilaterally asymmetrical about the intermediate axis, and and an anvil comprising a pair of forming pockets wherein the forming pockets are rotationally asymmetric about said center point.
(2) the proximal forming pocket is
a proximal pocket forming surface including a proximal pocket entry region and a proximal pocket exit region, wherein said proximal pocket entry region comprises a first radius of curvature and said proximal pocket exit region comprises a second radius of curvature wherein said first radius of curvature and said second radius of curvature are different, said first radius of curvature and said second radius of curvature defining a first curvature ratio and wherein the distal forming pocket comprises:
a distal pocket forming surface including a distal pocket entry region and a distal pocket exit region, wherein said distal pocket entry region comprises a third radius of curvature and said distal pocket exit region comprises a fourth radius of curvature wherein said third radius of curvature and said fourth radius of curvature are different, said third radius of curvature and said fourth radius of curvature defining a second curvature ratio, said first curvature ratio 2. The stapling assembly of claim 1, comprising a distal pocket forming surface having a different second curvature ratio.
(3) the proximal forming pocket is
A proximal pocket forming surface including a proximal pocket entry region and a proximal pocket exit region, wherein the proximal pocket entry region comprises a first radius of curvature and the proximal pocket exit region comprises a second radius of curvature. and wherein said first radius of curvature and said second radius of curvature are different, said first radius of curvature and said second radius of curvature defining a first curvature ratio and wherein said distal forming pocket is
a distal pocket forming surface including a distal pocket entry region and a distal pocket exit region, wherein said distal pocket entry region comprises a third radius of curvature and said distal pocket exit region comprises a fourth radius of curvature wherein said third radius of curvature and said fourth radius of curvature are different, said third radius of curvature and said fourth radius of curvature defining a second curvature ratio, said first radius of curvature and the third radius of curvature is different, the second radius of curvature and the fourth radius of curvature are different, and the first curvature ratio and the second curvature ratio are the same. A stapling assembly according to claim 1, comprising:
(4) said proximal forming pocket comprises a proximal pocket forming surface, said proximal pocket forming surface comprises a proximal pocket valley depth, said distal forming pocket comprises a distal pocket forming surface, said distal pocket forming surface; 2. The stapling assembly of claim 1, wherein the proximal pocket forming surface includes a distal pocket valley depth, and wherein the proximal pocket valley depth and the distal pocket valley depth are different.
(5) The stapling assembly of claim 4, wherein said proximal pocket valley depth is greater than said distal pocket valley depth.

(6) said pair of sculpting pockets define an intermediate reference point between said proximal sculpting pocket and said distal sculpting pocket, said intermediate datum point being a proximal end of said proximal sculpting pocket; 2. The stapling assembly of claim 1, positioned at the center point defined between the distal end of the distal forming pocket.
(7) said pair of sculpting pockets define an intermediate reference point between said proximal sculpting pocket and said distal sculpting pocket, and said intermediate datum point is a proximal end of said proximal sculpting pocket; 2. The stapling assembly of claim 1, positioned at a point other than the center point defined between the distal end of the distal forming pocket.
(8) each said prepping pocket includes an entry region configured to receive a corresponding tip of said staple; 2. The stapling assembly of claim 1, large.
Clause 9. The stapling assembly of clause 1, wherein said corresponding legs of said staples include equal leg heights.
(10) the proximal forming pocket is
a proximal pocket-forming surface;
a pair of sidewalls extending between the proximal pocket-forming surface and the tissue-engaging surface at a first angle relative to the tissue-engaging surface, the distal forming pocket comprising:
a distal pocket-forming surface;
A pair of sidewalls between the distal pocket forming surface and the tissue engaging surface extending at a second angle relative to the tissue engaging surface, wherein the first angle is greater than the second angle. 2. The stapling assembly of claim 1, comprising a pair of side walls that differ in angle.

(11) The stapling assembly of Claim 10, wherein said first angle is less than said second angle.
(12) the proximal forming pocket is
a proximal pocket-forming surface, comprising:
a proximal inlet width;
a proximal pocket forming surface including a proximal exit width, the distal forming pocket comprising:
a distal pocket-forming surface, comprising:
a distal inlet width;
a distal exit width, wherein said proximal entrance width is different from said distal entrance width and said proximal exit width is different from said distal exit width. 2. The stapling assembly of claim 1, comprising a forming surface.
(13) the proximal forming pocket is
a proximal pocket-forming surface;
a pair of separate sidewalls extending between the proximal pocket forming surface and the tissue engaging surface, the distal forming pocket comprising:
a distal pocket-forming surface;
2. The stapling assembly of claim 1, comprising a pair of separate sidewalls extending between the distal pocket forming surface and the tissue engaging surface.
(14) A stapling assembly comprising:
a first jaw;
a second jaw movable relative to the first jaw;
a staple cartridge containing a plurality of staples;
an anvil configured to deform the staple, comprising:
a tissue engaging surface;
an array of formation pockets defined in said tissue engaging surface, said formation pockets configured to deform corresponding legs of said staples;
a staple row axis;
A first region of a pair of forming pockets positioned along a first portion of the staple row axis, wherein the pair of forming pockets in the first region includes a first shape. a region of
a second region of a pair of forming pockets positioned along a second portion of the staple row axis, wherein the pair of forming pockets in the second region includes a second shape; Different from said second shape and each said formed pocket pair in said second region having:
a longitudinal pocket axis;
an intermediate axis including a center point;
a proximal formation pocket;
a distal forming pocket, wherein the forming pocket pair in the second region is bilaterally symmetrical about the longitudinal pocket axis, and the forming pocket pair in the second region is bilaterally symmetrical about the intermediate axis. a second region of a pair of formed pockets that is bilaterally asymmetric with respect to said pair of formed pockets, said pair of formed pockets being rotationally asymmetric about said center point; a stapling assembly.
(15) A stapling assembly comprising:
a first jaw;
a second jaw movable relative to the first jaw;
a staple cartridge containing a plurality of staples;
an anvil configured to deform the staple, comprising:
a tissue engaging surface;
A pair of forming pockets defined in the tissue engaging surface, the pair of forming pockets configured to deform corresponding legs of the staple, the pair of forming pockets comprising:
a longitudinal pocket axis;
an intermediate axis including a center point;
a proximal formation pocket;
a distal forming pocket, wherein said pair of forming pockets are bilaterally asymmetric with respect to said longitudinal pocket axis and said intermediate axis, and said pair of forming pockets are rotationally symmetrical with respect to said central point. A stapling assembly comprising: an anvil comprising a pair of forming pockets that are asymmetric.

Clause 16. The stapling assembly of clause 15, wherein said shape of said proximal preparation pocket and said shape of said distal preparation pocket are the same.
(17) each of the proximal plastering pocket and the distal plastering pocket:
a forming surface;
16. According to claim 15, comprising a groove defined in said forming surface, said groove extending between a first side of said longitudinal pocket axis and a second side of said longitudinal pocket axis. A stapling assembly as described.
Clause 18. The stapling assembly of clause 17, wherein the proximal forming pocket and the distal forming pocket each include a fillet transition between the groove and the forming surface.
Clause 19. The stapling assembly of clause 17, wherein each said staple includes a staple diameter and said groove includes a diameter less than said staple diameter.
Clause 20. The stapling assembly of clause 17, wherein each said staple includes a staple diameter and said groove includes a diameter greater than said staple diameter.

Claims (10)

A stapling assembly comprising:
a first jaw;
a second jaw movable relative to the first jaw;
a staple cartridge including a plurality of staples provided in the first jaw; and
a longitudinally extending anvil of the stapling assembly provided on the second jaw and configured to deform the staple;
a tissue engaging surface;
A pair of forming pockets defined in the tissue engaging surface, the pair of forming pockets configured to deform corresponding legs of the staple, the pair of forming pockets comprising:
a proximal formation pocket;
a distal formation pocket;
the longitudinally extending longitudinal pocket axis;
an intermediate axis extending in a direction perpendicular to the longitudinal direction that includes a center point at a bridge portion between the proximal and distal forming pockets, wherein the pair of forming pockets are aligned along the longitudinal direction; bilaterally symmetrical about a directional pocket axis, said pair of forming pockets being bilaterally asymmetrical about said intermediate axis, and said pair of forming pockets being rotationally asymmetrical about said center point; an anvil comprising a pair of forming pockets; and
the proximal formation pocket comprising:
a proximal pocket forming surface including a proximal pocket entry region and a proximal pocket exit region, wherein said proximal pocket entry region comprises a first radius of curvature and said proximal pocket exit region comprises a second radius of curvature wherein the first radius of curvature and the second radius of curvature are different, and wherein the ratio of the first radius of curvature to the second radius of curvature defines a first curvature ratio a pocket-forming surface, the distal forming pocket comprising:
a distal pocket forming surface including a distal pocket entry region and a distal pocket exit region, wherein said distal pocket entry region comprises a third radius of curvature and said distal pocket exit region comprises a fourth radius of curvature wherein the third radius of curvature and the fourth radius of curvature are different, the ratio of the third radius of curvature to the fourth radius of curvature defining a second curvature ratio, and the first and a distal pocket-forming surface having different curvature ratios and said second curvature ratio. said proximal forming pocket comprising said proximal pocket forming surface; said proximal pocket forming surface comprising said proximal pocket valley depth; said distal forming pocket comprising said distal pocket forming surface; The stapling assembly of claim 1, wherein the pocket forming surface includes a distal pocket root depth, and wherein the proximal pocket root depth and the distal pocket root depth are different. The stapling assembly of claim 2, wherein the proximal pocket valley depth is greater than the distal pocket valley depth. Each prep pocket includes an entry region configured to receive a tip of the corresponding leg of the staple, and the entry region of the distal prep pocket is the entry region of the proximal prep pocket. 2. The stapling assembly of claim 1, which is larger. The stapling assembly of claim 1, wherein the corresponding legs of the staple include equal leg heights. the proximal formation pocket comprising:
the proximal pocket forming surface;
a pair of sidewalls extending between the proximal pocket-forming surface and the tissue-engaging surface at a first angle relative to the tissue-engaging surface, the distal forming pocket comprising:
the distal pocket forming surface;
A pair of sidewalls between the distal pocket forming surface and the tissue engaging surface extending at a second angle relative to the tissue engaging surface, wherein the first angle is greater than the second angle. 2. The stapling assembly of claim 1, comprising a pair of sidewalls that differ in angle. The stapling assembly according to claim 6, wherein said first angle is less than said second angle. the proximal formation pocket comprising:
The proximal pocket forming surface,
a proximal inlet width;
a proximal exit width, the proximal pocket forming surface comprising:
The distal pocket forming surface, comprising:
a distal inlet width;
a distal exit width, wherein said proximal entrance width is different from said distal entrance width and said proximal exit width is different from said distal exit width. The stapling assembly of claim 1, comprising a forming surface. the proximal formation pocket comprising:
the proximal pocket forming surface;
a pair of separate sidewalls extending between the proximal pocket forming surface and the tissue engaging surface, the distal forming pocket comprising:
the distal pocket forming surface;
The stapling assembly of claim 1, comprising a pair of separate sidewalls extending between the distal pocket forming surface and the tissue engaging surface. A stapling assembly comprising:
a first jaw;
a second jaw movable relative to the first jaw;
a staple cartridge including a plurality of staples provided in the first jaw; and
a longitudinally extending anvil of the stapling assembly provided on the second jaw and configured to deform the staple;
a tissue engaging surface;
an array of formed pockets defined in the tissue engaging surface, the array of formed pockets configured to deform corresponding legs of the staple;
the longitudinally extending staple row axis;
A first region of a pair of forming pockets positioned along a first portion of the staple row axis, wherein the pair of forming pockets in the first region includes a first shape. a region of
a second region of a pair of forming pockets positioned along a second portion of the staple row axis, wherein the pair of forming pockets in the second region includes a second shape; Different from said second shape and each said formed pocket pair in said second region having:
a proximal formation pocket;
a distal formation pocket;
the longitudinally extending longitudinal pocket axis;
an intermediate axis extending in a direction perpendicular to the longitudinal direction that includes a center point at a bridge portion between the proximal and distal forming pockets, the forming pocket of the second region; pairs are bilaterally symmetrical with respect to said longitudinal pocket axis, said formed pocket pairs in said second region are bilaterally asymmetrical with respect to said intermediate axis, and said formed pocket pairs in said second region are bilaterally symmetrical with respect to said intermediate axis; a second region of a pair of formed pockets that is rotationally asymmetric about said center point; and a row of formed pockets comprising:
the proximal formation pocket comprising:
a proximal pocket forming surface including a proximal pocket entry region and a proximal pocket exit region, wherein said proximal pocket entry region comprises a first radius of curvature and said proximal pocket exit region comprises a second radius of curvature wherein the first radius of curvature and the second radius of curvature are different, the ratio of the first radius of curvature to the second radius of curvature defining a first curvature ratio a forming surface, the distal forming pocket comprising:
a distal pocket forming surface including a distal pocket entry region and a distal pocket exit region, wherein said distal pocket entry region comprises a third radius of curvature and said distal pocket exit region comprises a fourth radius of curvature wherein the third radius of curvature and the fourth radius of curvature are different, the ratio of the third radius of curvature to the fourth radius of curvature defining a second curvature ratio; and a distal pocket-forming surface having different curvature ratios and said second curvature ratio.

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