CN218515789U

CN218515789U - Internal urethral incision device

Info

Publication number: CN218515789U
Application number: CN202221344223.6U
Authority: CN
Inventors: 成少平; 孙芬
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2023-02-24
Anticipated expiration: 2032-05-30

Abstract

The utility model discloses an incision ware in urethra, include: a main body part, a moving part and a cutter mechanism; the main body part is provided with a hollow pore canal which is used for inserting a guide wire; the moving part is sleeved on the main body part in a sliding manner; the cutter mechanism comprises at least three cutting knives and hinge rods which are in one-to-one correspondence with the cutting knives, and the head ends of the at least three cutting knives are arranged around the main body part and hinged with the main body part; the head end of the hinged rod is hinged with the cutting knife, and the tail end of the hinged rod is hinged with the moving part; when the moving part slides towards the direction close to the head end of the incision knife, the tail ends of at least three incision knives deflect towards the direction far away from the main body part at the same time so as to incise scar tissues. The utility model discloses can become more meticulous the control to the incision degree of depth of scar tissue.

Description

Internal urethral incision device

Technical Field

The utility model relates to a urethral stricture treatment apparatus technical field especially relates to an incision ware in urethra.

Background

Urethral stricture is a common disease of urinary surgery, urethral dilation is a special operation for urethral stricture diseases, and when a dilator is directly inserted into a urethra in the operation, if a patient with severe urethral stricture is met, an operative practitioner often dares not to exert force. If the dilator is forcibly inserted, a "false passage" or excessive bleeding may result. In contrast, at present, a guide wire is generally inserted into the urethra to cross the narrow part, and then the incision knife in the urethra cuts scar tissues under the guidance of the guide wire, while the traditional incision knife is usually of a fixed structure, so that the incision depth of the scar tissues is not easy to grasp.

For example, the chinese utility model patent, the grant publication number is CN207306719U, discloses a simple and easy intraurethral incision device, and its main technical points are: the tip part is designed into a triangular pyramid-shaped tool bit, so the cutting depth is shallow, and the stress in three directions is more uniform; the contact area between the incision point part in the urethra and the narrow part of the urethra is reduced, and the urethra scar is easy to cut.

For the prior art, the incision depth of the scar tissue cannot be adjusted by adopting the triangular pyramid-shaped cutter head, and in conclusion, no effective solution is provided at present how to refine the incision depth of the scar tissue.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an endourethral dissector that solves the technical problem of the prior art that the depth of incision of scar tissue cannot be adjusted.

In order to achieve the technical purpose, the technical scheme of the utility model provides an incision ware in urethra, include: a main body part, a moving part and a cutter mechanism; the main body part is provided with a hollow pore canal which is used for inserting a guide wire; the moving part is sleeved on the main body part in a sliding manner;

the cutter mechanism comprises at least three cutting knives and hinge rods which are in one-to-one correspondence with the cutting knives, and the head ends of the at least three cutting knives are arranged around the main body part and hinged with the main body part; the head end of the hinged rod is hinged with the cutting knife, and the tail end of the hinged rod is hinged with the moving part; when the moving part slides towards the direction close to the head end of the incision knife, the tail ends of at least three incision knives deflect towards the direction far away from the main body part at the same time so as to incise scar tissues.

Furthermore, the moving part comprises a moving sleeve and a screw cap, and the moving sleeve is slidably sleeved on the main body part and is hinged with the tail end of the hinge rod; the screw cap is in threaded connection with the outer wall of the hollow pore passage and is abutted against the movable sleeve.

Furthermore, the main body part comprises the hollow pore channel, a fixing sleeve and a handle, one end of the hollow pore channel is arranged in the handle in a penetrating manner, the other end of the hollow pore channel is arranged in the fixing sleeve in a penetrating manner, and the hollow pore channel between the handle and the fixing sleeve is connected with the screw cap; one end, close to the screw cap, of the fixing sleeve is slidably arranged in the movable sleeve, and one end, far away from the screw cap, of the fixing sleeve is hinged to the incision knife.

Furthermore, the main body part further comprises an elastic part, a containing cavity for containing the elastic part is formed in the fixed sleeve, one end of the elastic part is fixedly connected with the inner wall of the containing cavity, and the other end of the elastic part is fixedly connected with the movable sleeve.

Furthermore, the elastic part is a spring, and the spring is sleeved on the hollow pore passage.

Further, the incision knife is an arc-shaped knife, and the cutting edge of the arc-shaped knife is arranged in a direction away from the main body part and used for incising scar tissues.

Further, when at least three arc-shaped knives deflect to the highest position in the direction far away from the main body part, the maximum section radius of the arc-shaped knives at the same height is 24cm.

Further, the number of the arc-shaped knives is three, and the included angle between every two adjacent arc-shaped knives is 120 degrees.

Furthermore, the handle is coated with an anti-slip layer.

Further, the anti-skid layer is a rubber layer.

Compared with the prior art, the beneficial effects of the utility model are that: the movable part is sleeved on the main body part in a sliding manner, the cutter mechanism comprises at least three cutting knives and hinge rods which correspond to the cutting knives one by one, the head ends of the at least three cutting knives are arranged around the main body part and hinged with the main body part, the head ends of the hinge rods are hinged with the cutting knives, and the tail ends of the hinge rods are hinged with the movable part; through the setting mode, the incision depth of scar tissues can be finely controlled.

Drawings

FIG. 1 is a first schematic view of an internal urethral dissector according to an embodiment of the present invention;

FIG. 2 is a schematic structural view II of an endourethral cutter according to an embodiment of the present invention;

in the figure: 1. the cutting tool comprises a main body part, 11 parts of a hollow pore passage, 12 parts of a fixing sleeve, 13 parts of a handle, 14 parts of an elastic piece, 2 parts of a moving part, 21 parts of a moving sleeve, 22 parts of a screw cap, 3 parts of a cutter mechanism, 31 parts of a cutting knife and 32 parts of a hinge rod.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

As shown in fig. 1-2, the present invention provides an intraurethral dissector, comprising: a main body part 1, a moving part 2 and a cutter mechanism 3.

The main body 1 has a hollow hole 11, and the hollow hole 11 is used for inserting a guide wire.

The moving part 2 is slidably sleeved on the main body part 1.

The cutter mechanism 3 comprises at least three cutting knives 31 and hinge rods 32 which are in one-to-one correspondence with the cutting knives 31, and the head ends of the at least three cutting knives 31 are arranged around the main body part 1 and hinged with the main body part 1; the head end of the hinge rod 32 is hinged with the cutting knife 31, and the tail end of the hinge rod 32 is hinged with the moving part 2.

Specifically, for a patient with severe urethral stricture, a guide wire is inserted into the hollow duct 11, the guide wire is passed over the urethral stricture, the movable portion 2 is slid upward, the three incision knives 31 are simultaneously deflected in a direction away from the main body portion 1, the urethral scar tissue is cut by the blades of the three incision knives 31, and finally the movable portion 2 is slid downward, the three incision knives 31 are simultaneously deflected in a direction close to the main body portion 1, and the catheter is taken out from the urethra. To determine the effect of the operation, the above operation is repeated until the scar tissue of the urethra is cut by inserting a urethroscope into the urethra and adjusting the opening angles of the three cutting blades 31.

It should be noted that the number of the incision knives 31 is not particularly limited in this embodiment, and it should be considered that the number of the incision knives 31 is adjusted according to actual surgical requirements, and the number of the incision knives 31 is preferably three in this embodiment.

In order to make the process of opening the three cutting blades 31 more smooth, the structures of the moving part 2 and the main body part 1 are further defined.

Referring to fig. 1-2, the moving part 2 includes a moving sleeve 21 and a nut 22, the moving sleeve 21 is slidably sleeved on the main body part 1 and is hinged to the tail end of the hinge rod 32; the nut 22 is screwed to the outer wall of the hollow shaft 11 and abuts against the moving sleeve 21.

Further, the main body part 1 comprises a hollow pore canal 11, a fixing sleeve 12 and a handle 13, one end of the hollow pore canal 11 is arranged in the handle 13 in a penetrating way, the other end of the hollow pore canal 11 is arranged in the fixing sleeve 12 in a penetrating way, and the hollow pore canal 11 between the handle 13 and the fixing sleeve 12 is connected with a screw cap 22; the end of the fixing sleeve 12 close to the nut 22 is slidably arranged in the moving sleeve 21, and the end of the fixing sleeve 12 far from the nut 22 is hinged with the cutting knife 31.

Still further, the main body part 1 further comprises an elastic part 14, a cavity for accommodating the elastic part 14 is formed in the fixing sleeve 12, one end of the elastic part 14 is fixedly connected with the inner wall of the cavity, and the other end of the elastic part 14 is fixedly connected with the movable sleeve 21; the resilient member 14 is preferably a spring and the spring is arranged around the hollow shaft 11.

In this embodiment, when the nut 22 is rotated forward and the moving sleeve 21 is pushed to move upward, the three cutting blades 31 are deflected simultaneously in a direction away from the main body 1 for cutting scar tissue of the urethra, and when the nut 22 is rotated backward and the moving sleeve 21 moves downward, the three cutting blades 31 are deflected simultaneously in a direction close to the main body 1 for taking out the cutting blades 31.

In order to facilitate the incision of scar tissue and avoid the situation that the incision of the scar tissue is too deep due to the fact that the incision angle of the incision knife 31 is too large, the structure of the incision knife 31 is further limited.

Referring to fig. 1, the incision knife 31 is an arc-shaped knife, and the cutting edge of the arc-shaped knife is arranged in a direction away from the main body 1.

Further, when the at least three arc-shaped cutters deflect to the highest position in the direction away from the main body part 1, the maximum cross section of the at least three arc-shaped cutters at the same height forms a circle with the semi-circumference diameter of 24cm.

Still further, when the number of the arc-shaped knives is three, the included angle between every two adjacent arc-shaped knives is 120 °.

In this embodiment, the included angles between the three arc-shaped knives are equal, so that the stress in three directions for cutting scar tissue is uniform, and when the three arc-shaped knives are opened, the maximum deflection angle of the arc-shaped knives from the fixed sleeve 12 can be controlled by the movement of the screw cap 22, so as to avoid accidentally injuring the tissues around the urethra in the operation.

It should be noted that the top end of the fixing sheath 12 is detachably connected with a conical expansion head, the expansion head is of a linear structure (collinear with the fixing sheath 12) or a bending structure (included angle with the fixing sheath 12), and the urethral stricture can be expanded by replacing different types of conical expansion heads.

Those not described in detail in this specification are well within the skill of the art.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. An intraurethral dissector, comprising: a main body part, a moving part and a cutter mechanism;

the main body part is provided with a hollow pore canal which is used for inserting a guide wire;

the moving part is sleeved on the main body part in a sliding manner;

the cutter mechanism comprises at least three cutting knives and hinge rods which are in one-to-one correspondence with the cutting knives, and the head ends of the at least three cutting knives are arranged around the main body part and hinged with the main body part; the head end of the hinged rod is hinged with the cutting knife, the tail end of the hinged rod is hinged with the moving part, the cutting knife is an arc-shaped knife, and the cutting edge of the arc-shaped knife is arranged in the direction away from the main body part;

when the moving part slides towards the direction close to the head end of the incision knife, the tail ends of at least three incision knives deflect towards the direction far away from the main body part at the same time so as to incise scar tissues.

2. The intraurethral dissector according to claim 1, wherein the moving part comprises a moving sleeve and a nut, the moving sleeve is slidably sleeved on the main body part and is hinged with the tail end of the hinge rod; the screw cap is in threaded connection with the outer wall of the hollow pore passage and is abutted against the movable sleeve.

3. The intraurethral dissector of claim 2 wherein said body section includes said hollow tunnel, a retaining sleeve and a handle, one end of said hollow tunnel extending through said handle and the other end of said hollow tunnel extending through said retaining sleeve, said hollow tunnel between said handle and said retaining sleeve being connected to said nut; one end, close to the screw cap, of the fixing sleeve is slidably arranged in the movable sleeve, and one end, far away from the screw cap, of the fixing sleeve is hinged to the incision knife.

4. The intraurethral dissector of claim 3, wherein the main body further comprises an elastic member, a cavity for accommodating the elastic member is formed in the fixed sleeve, one end of the elastic member is fixedly connected with the inner wall of the cavity, and the other end of the elastic member is fixedly connected with the movable sleeve.

5. The endo-urethral dissector of claim 4, wherein the resilient member is a spring that is received over the hollow tunnel.

6. The endourethral dissector of claim 1 wherein the number of the arcuate blades is three and the angle between each adjacent two of the arcuate blades is 120 °.

7. The endo-urethral dissector of claim 6, wherein the maximum cross-sectional radius at the same height of the three curved blades when the three curved blades are deflected away from the main body portion, respectively, is 24cm.

8. The endo-urethral dissector of claim 3, wherein the handle is coated with an anti-slip layer.

9. The intraurethral dissector of claim 8, wherein the non-slip layer is a rubber layer.