CN214434345U

CN214434345U - Soft tissue repair device

Info

Publication number: CN214434345U
Application number: CN202022623258.0U
Authority: CN
Inventors: 张博; 林�源; 任世项; 赵潇雄; 刘勇; 王坤; 李仁耀; 曾敬松
Original assignee: Nathon Biotechnology Beijing Co ltd
Current assignee: Nathon Biotechnology Beijing Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-10-22
Anticipated expiration: 2030-11-13

Abstract

The utility model discloses a soft tissue prosthetic devices, including anchor and connecting wire, wherein the anchor includes outside part and inside part, the near-end terminal surface of outside part is equipped with axial cavity, two distal end through wires holes of locating the distal end and two near-end through wires holes of locating the near-end are drawn into in the cavity including two distal end through wires holes of outside part, the inside part is equipped with axial through-hole, the inside part stretches into in the cavity from the near-end of outside part, the connecting wire passes through the near-end through wires hole, distal end through wires hole and through-hole are preset in outside part and inside part, the connecting wire forms the go-between in the near-end outside of inside part, along with the tensioning at connecting wire both ends, the inside part to the distal end remove and with outside part chucking in the outside. The utility model discloses only need pass the connecting wire with the soft tissue, need not sew up, simplified the operating procedure of operation.

Description

Soft tissue repair device

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a soft tissue prosthetic devices that is arranged in bone and soft tissue to be connected fixedly in bone surgery.

Background

Ligaments, tendons or other soft tissue have separated from the body and their associated bone completely or incompletely in recent years, which is a relatively common injury; or after ligament, tendon or other soft tissues are subjected to ligament repair and reconstruction surgery, in the early rehabilitation process of a patient, due to the fact that the fixation between the soft tissues and bones is not firm enough, the relative sliding movement of the soft tissues occurs or the implanted fixing device is loosened or even falls off, and proper healing can be delayed or inhibited.

At present, the repair is mainly realized through arthroscopic surgery, two repair ways are adopted, one is U-shaped nail (door-shaped nail) fixation, the implant is applied to soft tissue fixation, soft tissue (such as anterior cruciate ligament) is embedded in the middle of 'stand columns' on two sides of a nail body, a special tool is used for knocking the 'stand columns' into the bone surface to a proper depth, and the soft tissue to be fixed is pressed through a tail end 'beam' to complete fixation. This type of fixation is accompanied by certain drawbacks: after implantation, the tail end part of the implant protrudes out of the bone surface to cause irritation of other surrounding soft tissues or discomfort of the front knee of a patient, and the front knee pain of the patient occurs when the patient squats or kneels; the implant has a large transverse span and the surgical incision causes a large amount of additional trauma during implantation. Another type of fixation is suture anchor fixation, the general steps of suture anchors used for soft tissue fixation are: after the anchor body is implanted into the bone surface, the suture needle or the special thread passing tool is utilized to pass the carried suture through the soft tissue to be fixed, and two free ends of the same suture are knotted to complete the fixation. This type of fastening also involves several disadvantages: the operation process is complicated and time-consuming; the suturing and knotting processes are manually completed by a surgeon; the suture diameter is small, and the possibility of cutting soft tissues exists.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a soft tissue repair device.

A soft tissue repair device comprises an anchor and a connecting wire, wherein the anchor comprises an outer part and an inner part, an axial hollow is arranged on the end face of the proximal end of the outer part, the outer part comprises two distal threading holes arranged at the distal end and two proximal threading holes arranged at the proximal end, the inner part is provided with an axial through hole, the inner part extends into the hollow from the proximal end of the outer part, the connecting wire is preset in the outer part and the inner part through the proximal threading holes, the distal threading holes and the through hole, the connecting wire forms a connecting ring on the outer side of the proximal end of the inner part, and the inner part moves to the distal end in the outer part and is tightly clamped with the outer part along with the tensioning of the two ends of the connecting wire.

Preferably, the outer part of the outer part is cylindrical, the far-end threading holes are symmetrically arranged on the far-end face of the outer part, and the axis of the far-end threading hole is parallel to the axis of the outer part.

Preferably, the proximal threading holes are symmetrically arranged on the outer wall of the outer member close to the proximal side of the distal threading hole, and the axial lines of the proximal threading holes are perpendicular to the axial lines of the outer member.

According to the preferable technical scheme, the far-end face of the outer part is provided with the middle part, the middle part is positioned between the two far-end threading holes, and after the outer part and the inner part are clamped, the far-end face of the inner part is attached to the near-end face of the middle part.

In the above technical solution, it is preferable that the outer wall of the outer member is provided with wire grooves corresponding to the proximal threading holes, and the wire grooves penetrate through the outer wall of the outer member in the axial direction of the outer member toward the proximal end.

Preferably, in the above technical solution, the width of the wire guide groove is greater than or equal to the aperture of the proximal threading hole.

Preferably, in the above technical solution, the cross section of the wire groove is circular arc or rectangular.

Above technical scheme is preferred, the distal end of inside part is equipped with the arch, the arch is used for with near-end through wires hole chucking.

Above technical scheme is preferred, the outside of near-end threading hole is equipped with the circular arc structure.

Preferably, in the above technical solution, the hollow cross section of the outer member is circular or elliptical, and the cross section of the inner member is adapted to the hollow cross section.

The utility model has the advantages and positive effects that: the utility model provides a soft tissue repair device, wherein connecting wires are preset in an inner part and an outer part of an anchor, when in use, soft tissue penetrates into a connecting ring positioned at the near end of the inner part, and after the anchor is implanted, the connecting wires are tensioned and then knotted; the whole body of the implanted anchor nail is embedded below the surface of the bone, so that the problems of kneeling pain and the like of a patient after the implantation of a door-shaped nail can be avoided; the anchor only needs to penetrate the soft tissue through the connecting line, and does not need to be sutured, so the operation steps of the operation are simplified; the soft tissue can be pressed to the bone surface for fitting by a thicker suture or a thicker structure in the suture band, so that the soft tissue is prevented from being cut, and the surface of the soft tissue can be effectively protected from being damaged; the utility model discloses can avoid tying a knot fixedly, also can tie a knot and strengthen fixed effect, provide multiple choice for the complex condition in the operation.

Drawings

Fig. 1 is a schematic structural view of a soft tissue repair device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of an inner member according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an external component according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the soft tissue repair device provided by an embodiment of the present invention without a connecting wire.

Wherein: 1. an outer member; 2. an inner part; 3. a tape; 4. a thread structure; 6. a through hole; 7. A connecting ring; 8. an intermediate member; 9. a wire guide groove; 10. a protrusion; 11. a circular arc structure; 12. a first proximal threading aperture; 13. a second proximal threading aperture; 14. a first distal threading aperture; 15. a second distal threading aperture.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment provides a soft tissue repair device, as shown in fig. 1-4, including anchor and connecting wire, the connecting wire is suture or line area 3, connecting wire is high strength suture or high strength line area that orthopedics is commonly used in this embodiment, has different line footpath specifications to adapt to different demands, the middle part in high strength line area is thickened, the local reducing of high strength suture, because soft tissues such as ligament or tendon can be pressed to the laminating of bone surface by thick structure in thick suture or line area 3, avoid cutting the soft tissue, can effectively protect the soft tissue surface not destroyed. The anchor comprises an outer part 1 and an inner part 2, wherein the periphery of the outer wall of the outer part 1 comprises a thread structure 4 or annular pawl structures distributed along the axial direction so as to smoothly mount the outer part 1 to a corresponding position fixed with soft tissue in a bone, and if the outer part 1 adopts the thread structure 4, the outer part 1 needs to be implanted and fixed by adopting a screwdriver screwing mode; if the outer part 1 is designed with annular inverted teeth distributed in the axial direction, the outer part 1 needs to be fixed by implantation in a driving manner. In the drawings of the embodiment, only the thread structure 4 is shown, the thread structure 4 is screwed into the preset hole at the corresponding fixed position on the surface of the bone, the thread structure 4 is only schematically illustrated in the drawings, the actual thread machining is performed to ensure that the thread is screwed into the bone and is not loosened, and the form and the thread pitch can be combined in various ways. The thread structure 4 and the annular pawl structure belong to the prior art structures of anchor and bone tunnel connection and are not described in detail herein.

Specifically, the outer member 1 includes a threading hole structure, the threading hole structure is divided into a near-end threading hole and a far-end threading hole, an axial hollow is formed in the end face of the near end of the outer member 1, the outer member 1 includes two far-end threading holes arranged at the far end and two near-end threading holes arranged at the near end, the inner member 2 is provided with an axial through hole 6, the inner member 2 extends into the hollow from the near end of the outer member 1, the connecting wire is preset in the outer member 1 and the inner member 2 through the near-end threading holes, the far-end threading holes and the through hole 6, and the connecting wire is arranged on the outer side of the near end of the inner member 2 to form a connecting ring 7. As the two ends of the connecting cable are pulled tight, the inner member 2 moves distally within the outer member 1 and is clamped to the outer member 1, and the outer member 1 and the inner member 2 clamp the connecting cable.

Specifically, the distal end threading hole includes a first distal end threading hole 14 and a second distal end threading hole 15, and the proximal end threading hole includes a first proximal end threading hole 12 and a second proximal end threading hole 13. The connecting line trend is: (1) one end of the connecting wire enters a first near-end threading hole 12 on one side, (2) penetrates through a first far-end threading hole 14 on the same side as the first near-end threading hole 12 in the previous step and then penetrates out of the outer side part 1, (3) penetrates through a second far-end threading hole 15 on the opposite side, (4) enters a through hole 6 of the inner side part 2, is appropriately elongated and then penetrates through the connecting wire reversely through the through hole 6, a connecting ring 7 is formed on the near-end outer side of the inner side part 2, and (5) penetrates through the same side, namely the first far-end threading hole 14 in the step (2), penetrates through the second far-end threading hole 15 on the opposite side in the step (3), then penetrates through the second near-end threading hole 13 on the opposite side until the position of the other end of the connecting wire is reached, so that the one end of the connecting wire and the other end of the connecting wire are buried in the anchor mounting handle.

Specifically, the outer portion of the outer member 1 is cylindrical, and the distal threading holes are symmetrically formed in the distal end surface of the outer member 1. In order to ensure that the thread or string 3 can be passed through smoothly and relatively easily, the axis of the distal threading hole is parallel to the axis of the outer part 1.

Specifically, the near-end threading holes are symmetrically arranged on the outer wall of the outer side member 1 close to the near-end side of the far-end threading hole, the near-end threading holes are semicircular or approximately semicircular, and are all arranged at the same height position of the outer side member 1 and are symmetrical about the axis position in the outer side member 1. In order to ensure that the suture or string 3 can be passed through smoothly and can be moved relatively easily, the axis of the proximal threading hole is perpendicular to the axis of the outer member 1.

Specifically, the distal end face of the outer member 1 is provided with an intermediate member 8, the intermediate member 8 is located between the two distal threading holes, and after the outer member 1 and the inner member 2 are clamped, the distal end face of the inner member 2 is attached to the proximal end face of the intermediate member 8. The intermediate member 8 prevents the inner member 2 from sinking further and may form an abutment surface with the distal end of the inner member 2 to compress a line of connection passing between the two surfaces.

Furthermore, the outer wall of the outer member 1 is provided with wire grooves 9 corresponding to the proximal threading holes, and the wire grooves 9 penetrate through the outer wall of the outer member 1 in the axial direction of the outer member 1 towards the proximal end. Optionally, the width of the wire groove 9 is greater than or equal to the aperture of the proximal threading hole. The depth of the wire guide 9 is preferably such that the suture or tape 3 can slide relative to it when it is positioned thereon. The wire guide 9 is intended to ensure that the thread or thread band 3 passing through it can slide smoothly. The wire guide 9 may be formed in a circular arc shape or a rectangular shape according to the shape of the matched thread or tape 3.

Furthermore, no matter what type of implantation (screwing or hammering) of the outer part 1, a preset hole channel needs to be drilled in advance at a corresponding fixed position on the bone surface, and the outer part 1 is provided with structures with various sizes to adapt to different preset hole channel aperture sizes, so that different bone conditions can be better matched and people can be better adapted to.

Further, the hollowness of the outer member 1 enables the inner member 2 to be fitted. Optionally, the hollow portion is cylindrical and is penetrated by a symmetrical plane, and the hollow portion may also be elliptical.

Further, the inner member 2 is of a cylindrical configuration, and engages with the outer member 1, which is cylindrical at both the proximal and distal ends of the hollow portion, and provides a small clearance fit with the hollow portion. The distal end of the inner part 2 is provided with a pair of projections 10 which are adapted to engage with the proximal threaded bore of the outer part 1.

Further, the through hole 6 in the middle of the inner member 2 is configured and dimensioned to enable the double strand of suture or tape 3 to be threaded therethrough and to enable the suture or tape 3 to move relative to the through hole 6.

Further, the outer surface of the inner member 2 is cylindrical and is penetrated by a symmetrical plane. If the hollow portion of the outer member 1 is oval, the inner member 2 is also oval to achieve a better assembly.

Further, the anchor may be constructed from a variety of materials. In one embodiment, the material may have sufficient physical properties to allow implantation of the anchor into bone without damaging the anchor structure. The nature of the material depends on the specific type of anchor. Non-limiting examples of materials that may be used to make the anchor include metals such as titanium, polymers such as Polyetheretherketone (PEEK), or combinations thereof. In one example, the anchor may be absorbable, non-absorbable, or a combination thereof.

Further, an arc structure 11 is arranged outside the near-end threading hole. The arc structure 11 can prevent the suture or the thread belt 3 from being cut in the tensioning process to influence the operation effect.

The working process of the embodiment: the connecting wire takes a string 3 as an example, the string 3 is used for fixing tendons or ligaments, one end of the string 3 and the other end of the string 3 are both arranged in a mounting handle (the inner part 2 and the outer part 1) of the anchor before the anchor is implanted, the string 3 runs such that one end of the string 3 enters the first distal-end threading hole 14 on the side of the outer member 1 along the wire guide groove 9 on the side, the threading holes pass through the first far-end threading holes 14 on the same side, bypass the middle part 8, pass through the second far-end threading holes 15 on the opposite side, enter the through holes 6 of the inner part 2, are properly elongated until the thicker part in the middle of the thread belt 3 passes through the through holes 6, pass the thread belt 3 reversely through the through holes 6, pass through the first far-end threading holes 14 on the same side, pass through the second far-end threading holes 15 on the opposite side, pass through the second near-end threading holes 13 on the opposite side, and pass through the thread guide grooves 9 on the opposite side until the other end of the thread belt 3 is threaded.

The thread structure 4 needs to be firstly screwed into the final depth of the bone surface, and then the connecting ring 7 of the thicker part in the middle of the thread belt 3 penetrates through the tendon or ligament to be fixed; the connecting ring 7 of the thicker part in the middle of the annular inverted tooth structure anchor line strip 3 can firstly penetrate through the tendon or ligament to be fixed, and can also be firstly driven into the anchor to the final depth of the bone surface.

When the operation is performed to fix soft tissues such as tendons or ligaments to a bone surface, the tendons or ligaments to be fixed penetrate through the connecting ring 7 in the thicker middle part of the string 3, the tendons or ligaments to be fixed are stretched, and after sufficient pre-tightening force is ensured, one end of the string 3 and the other end of the string 3 are tightened. During tightening, the inner part 2 will sink correspondingly, and the locking will be achieved when the protrusion 10 at the distal end of the inner part 2 is configured to engage in the proximal end of the outer part 1. If the tendon or ligament to be fixed needs to be readjusted, it can be adjusted before the protrusion 10 structure is inserted into the threading hole, and the string 3 can be moved again. The middle part 8 can prevent the inner part 2 from further sinking, can also form a joint surface with the far end of the inner part 2, compresses the string 3 passing through the two surfaces, sinks the inner part 2 into the outer part 1 completely, fixes the tendon or ligament to be fixed to the bone surface, cuts off the redundant string 3, and completes the fixation of the soft tissue and the bone surface. In order to enhance the fixing effect of the soft tissue and the bone surface, the excess tape 3 can be cut after knotting the two ends of the tape 3 before the excess tape 3 is cut.

Because the threading hole of the near end of the outer part 1 is semicircular or approximately semicircular, after the threading hole is assembled with the structure of the far end bulge 10 of the inner part 2, the inner part 2 can be effectively prevented from loosening, and when the assembly is completed, the operator can hear the clicking sound, so that the operator can conveniently judge whether the assembly is in place.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A soft tissue repair device, characterized by: the anchor comprises an anchor and a connecting wire, wherein the anchor comprises an outer part and an inner part, an axial hollow part is arranged on the end face of the proximal end of the outer part, the outer part comprises two distal threading holes arranged at the distal end and two proximal threading holes arranged at the proximal end, the inner part is provided with an axial through hole, the inner part extends into the hollow part from the proximal end of the outer part, the connecting wire is preset in the outer part and the inner part through the proximal threading holes, the distal threading holes and the through hole, the connecting wire forms a connecting ring on the outer side of the proximal end of the inner part, and along with the tensioning of the two ends of the connecting wire, the inner part moves to the distal end in the outer part and is tightly clamped with the outer part.

2. The soft tissue repair device of claim 1, wherein: the outer part of the outer part is cylindrical, the far-end threading holes are symmetrically arranged on the far-end face of the outer part, and the axis of each far-end threading hole is parallel to the axis of the outer part.

3. The soft tissue repair device of claim 2, wherein: the near-end threading holes are symmetrically arranged on the outer wall of the outer side part close to the near-end side of the far-end threading hole, and the axis of the near-end threading hole is vertical to the axis of the outer side part.

4. The soft tissue repair device of claim 2, wherein: the far-end face of the outer part is provided with an intermediate part, the intermediate part is positioned between the two far-end threading holes, and after the outer part and the inner part are clamped, the far-end face of the inner part is attached to the near-end face of the intermediate part.

5. The soft tissue repair device of claim 3, wherein: the outer wall of the outer part is provided with wire grooves corresponding to the near-end threading holes, and the wire grooves penetrate through the outer wall of the outer part towards the near end along the axial direction of the outer part.

6. The soft tissue repair device of claim 5, wherein: the width of the wire guide groove is larger than or equal to the aperture of the near-end threading hole.

7. The soft tissue repair device of claim 5, wherein: the cross section of the wire groove is arc-shaped or rectangular.

8. The soft tissue repair device of claim 1, wherein: the far end of the inner part is provided with a bulge which is used for being tightly clamped with the near-end threading hole.

9. The soft tissue repair device of claim 1, wherein: and an arc structure is arranged outside the near-end threading hole.

10. The soft tissue repair device of claim 1, wherein: the hollow cross section of the outer part is circular or elliptical, and the cross section shape of the inner part is adapted to the hollow cross section shape.