Knot pushing instrument used in endoscopic suturing operation

Abstract

The utility model provides a knot pushing instrument used in an endoscopic suture operation, which belongs to the technical field of medical instruments and comprises a knot pushing instrument main body, a handle arranged at the rear end of the knot pushing instrument main body, a knot pushing ring arranged at the front end of the knot pushing instrument main body, a threading hole penetrating through the middle of the knot pushing ring, and a threading notch arranged on the outer wall of the knot pushing ring. A bayonet device is movably mounted at the threading gap, and the threading gap can be opened by moving the bayonet device before threading, so that clinical medical personnel can conveniently perform threading operation of a suture line; after threading is finished, the threading notch is blocked by moving the bayonet device, so that the problems that a suture line slides out, falls off and the like in the knot pushing process are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to a knot-pushing instrument for endoscopic suture surgery. Background Technique

[0002] At present, during the wound suture process of orthopedic endoscopic surgery, there are generally two clinical suture methods: in-vivo threading method and ex-vivo threading method. Moreover, when using these two clinical suture methods of in-vivo threading method and ex-vivo threading method, three steps of knotting, knot-pushing, and thread-cutting need to be carried out sequentially in the subsequent operation process to complete the entire suture operation. Specifically, when a clinician performs knotting, knot-pushing, and thread-cutting operations, he needs to first perform a knotting action on the suture line outside the body, and then use a knot-pusher to push the knot to the bottom to complete the second knot between the two suture lines; after completing 2-3 knots, then use wire cutters to cut off the excess suture line to complete the entire suture operation.

[0003] However, the existing knot-pushers still have certain disadvantages in clinical use: the existing knot-pushers adopt a closed threading structure at the threading position, and the diameter of the conventional suture line is only 0.25 mm. Therefore, when clinical medical staff perform a threading action on the knot-pusher in a tense surgical environment, it is very difficult to thread the suture line successfully at one time, thereby reducing the intraoperative threading efficiency. To overcome this problem, the working part at the front end of some knot-pushers has been adjusted to an open structure. However, although it can improve the threading efficiency of clinical medical staff in surgery to a certain extent, it is prone to the problem that the suture line slips out during the knot-pushing process due to the notch existing at the front end of the knot-pusher, resulting in loose suturing. Summary of the Utility Model

[0004] The purpose of the utility model is to propose and design a knot-pushing instrument for endoscopic suture surgery to overcome the problem that the suture line is prone to slipping out during the use of the existing knot-pushers, so as to ensure the knot-pushing effect and the suturing effect of the suture line.

[0005] To achieve the above purpose, the technical solution provided by the utility model is: a knot-pushing instrument for endoscopic suture surgery, which includes a knot-pusher main body. A handle is arranged at the rear end of the knot-pusher main body, a knot-pushing ring is arranged at the front end of the knot-pusher main body, a threading hole penetrates through the middle of the knot-pushing ring, a threading notch is arranged on the outer wall of the knot-pushing ring, a bayonet is movably installed at the threading notch, and the threading notch can be opened by moving the bayonet before threading to facilitate the threading operation of the suture line by clinical medical staff; after threading is completed, the threading notch is blocked by moving the bayonet to avoid problems such as the suture line slipping out and falling off during the knot-pushing process.

[0006] Further, a wire knot rotation groove is formed on the front end face of the knot pushing ring. A knot pushing ring hole penetrates between the groove bottom of the wire knot rotation groove and the rear end face of the knot pushing ring. The knot pushing ring hole and the wire knot rotation groove together form a wire threading hole, and the knot pushing ring hole and the wire knot rotation groove are eccentrically arranged; an arc-shaped auxiliary knot pushing part is further arranged on the front end face of the knot pushing ring. The auxiliary knot pushing part is coaxially arranged with the wire knot rotation groove, and the auxiliary knot pushing part and the knot pushing ring hole are respectively arranged on both sides of the axis of the wire knot rotation groove. The front end face of the auxiliary knot pushing part is a smooth concave surface with the middle recessed inward. The deepest point of the smooth concave surface, the axis of the wire knot rotation groove, and the axis of the knot pushing ring hole are coplanar. In this way, during the knot pushing operation, the eccentric structure can make the knot pushing smoother, ensuring that the clinical medical staff can operate more accurately, conveniently, and quickly; at the same time, the deepest point of the smooth concave surface can be used as the force application point for the auxiliary wire to push the wire, effectively preventing the auxiliary wire from slipping or falling off.

[0007] Alternatively, the wire threading hole is a straight hole.

[0008] Further, the bayonet device includes a long rod. The long rod is slidably installed on the knot pusher main body along the length direction of the knot pusher main body, and an insertion block is arranged at the front end of the long rod. The insertion block can be inserted into the threading notch and located outside the threading notch; a push button is arranged at the rear part of the long rod. The push button is located outside the handle, and the entire long rod can be driven to slide back and forth on the knot pusher main body by pushing the push button, so as to push the insertion block into the threading notch or pull the insertion block out of the threading notch, thereby realizing the corresponding threading notch opening action and threading notch blocking action.

[0009] Further, a first step surface is arranged between the rear end of the insertion block and the outer wall of the long rod. When the first step surface contacts the knot pushing ring, the front end of the insertion block is flush with the front end of the knot pushing ring or the front end of the insertion block is located inside the threading notch. In this way, during the actual operation process, the relative position relationship between the insertion block and the threading notch can be restricted by the first step surface of the present utility model, preventing the insertion block and the long rod from moving forward excessively, that is, preventing the insertion block from protruding from the front end of the threading notch.

[0010] Further, a first sliding groove is formed on the outer wall of the knot pusher main body along the length direction. The long rod is slidably installed in the first sliding groove, and the sliding direction of the long rod is horizontally restricted by the side wall of the first sliding groove to prevent the sliding direction of the long rod from deflecting.

[0011] Further, a limiting baffle is arranged at the front part of the knot pusher main body. The limiting baffle is located outside the long rod and blocks the front part of the long rod to prevent the front end of the long rod from deflecting outward.

[0012] Further, a second chute is provided on the outer wall of the handle. The second chute is successively arranged as a U-shaped groove and a wide groove from back to front along the length direction. The rear end of the U-shaped groove penetrates through the rear end of the handle, and the groove width at the rear end of the U-shaped groove is greater than that at the front end; the front end of the wide groove penetrates through the front end of the handle. A second step surface is arranged at the rear part of the wide groove, a third step surface is arranged at the front part of the wide groove, and two arc grooves are arranged on the bottom of the wide groove along the length direction; the rear part of the long rod is slidably installed in the second chute, and a cylinder is arranged at the rear end of the long rod. The cylinder is slidably installed in the U-shaped groove, and the front end of the cylinder can abut against the second step surface; on the side of the long rod facing the bottom of the wide groove, a groove and an abutting part are successively arranged from back to front. A cantilever protrudes from the groove wall at the rear end of the groove, and a circular clamping block is arranged at the front end of the cantilever. When the inserting block is located within the threading notch, the circular clamping block can be clamped with the front arc groove, and when the inserting block is located outside the threading notch, the circular clamping block can be clamped with the rear arc groove. On the one hand, the present utility model can limit the position of the entire bayonet device through the second step surface and the third step surface to prevent it from moving forward excessively; on the other hand, the present utility model can play a role in reminding clinical medical staff whether the inserting block has moved in place and preventing the long rod from sliding freely within the handle through the cooperation between the circular clamping block and the arc groove; that is, when the inserting block is inserted into the threading notch, the clamping between the circular clamping block and the corresponding arc groove can be felt through the hand feeling when pushing the push button, so as to know whether the inserting block is inserted in place; conversely, when the inserting block needs to be pulled out from the threading notch, the clamping between the circular clamping block and the corresponding arc groove can also be felt through the hand feeling when pushing the push button, so as to know whether the inserting block is completely pulled out; and it can also prevent the long rod from sliding forward or backward to a certain extent through the clamping structure and friction force between the circular clamping block and the arc groove. In addition, the present utility model can also limit the cylinder through the groove wall at the front end of the U-shaped groove to prevent the long rod from sliding out of the handle.

[0013] Further, the push button and the groove are oppositely arranged on the long rod.

[0014] Further, a circular hole penetrates through the outer wall of the handle at the position where the arc groove is provided, and it can be observed through this circular hole whether the circular clamping block is located in the corresponding arc groove.

[0015] From the above technical solutions, it can be seen that the present utility model has the following advantages: Since the bayonet device is movably installed at the threading notch in the present utility model, it can open the threading notch by moving the bayonet device before threading to facilitate the threading operation of the suture by clinical medical staff; and after the threading is completed, the threading notch can be blocked by moving the bayonet device to avoid problems such as the suture slipping out or falling off during the knot-pushing process. Description of the Drawings

[0016] To more clearly illustrate the technical solution of the present utility model, the accompanying drawings required for description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0017] Figure 1 Structural schematic diagram of the first embodiment of the present utility model;

[0018] Figure 2 For Figure 1 Partial enlarged view at position B in

[0019] Figure 3 For Figure 1 Partial enlarged view at position A in

[0020] Figure 4 Cross-sectional view of the cooperation between the handle and the bayonet in the first embodiment of the present utility model;

[0021] Figure 5 Front-end structure schematic of the pusher knot body in the second embodiment of the present utility model Figure 1 ;

[0022] Figure 6 Front-end structure schematic of the pusher knot body in the second embodiment of the present utility model Figure 2 .

[0023] In the figure: 1. Pusher knot body; 2. Bayonet; 3. Handle; 4. Push button; 5. Limit baffle; 6. Long rod; 7. Pusher knot ring; 8. Insert block; 9. First step surface; 10. U-shaped groove; 11. Wide groove; 12. Circular hole; 13. First sliding groove; 14. Groove; 15. Circular clamping block; 16. Cantilever; 17. Arc groove; 18. Second step surface; 19. Third step surface; 20. Contact part; 21. Line knot rotation groove; 22. Pusher knot ring hole; 23. Auxiliary pusher knot part; 24. Smooth concave surface; M. Deepest point of the smooth concave surface. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0025] Embodiment 1

[0026] Such as Figures 1 to 4As shown in the figure, the first embodiment provides a knot-pushing instrument for endoscopic suture surgery, which includes a knot-pushing device body 1. A handle 3 is provided at the rear end of the knot-pushing device body 1, and a knot-pushing ring 7 is provided at the front end of the knot-pushing device body 1. A threading hole penetrates through the middle of the knot-pushing ring 7, and the threading hole is a straight hole; a threading notch is provided on the outer wall of the knot-pushing ring 7, and a bayonet device 2 is movably installed at the threading notch.

[0027] The bayonet device 2 includes a long rod 6. The long rod 6 is slidably installed in a first chute 13 opened on the outer wall of the knot-pushing device body 1 along the length direction of the knot-pushing device body 1. An insertion block 8 is provided at the front end of the long rod 6, and the insertion block 8 can be inserted into the threading notch and located outside the threading notch; a push button 4 is provided at the rear part of the long rod 6. The push button 4 is located outside the handle 3, and the entire long rod 6 can be driven to slide back and forth on the knot-pushing device body 1 by pushing the push button 4, so as to push the insertion block 8 into the threading notch or pull the insertion block 8 out of the threading notch, thereby realizing the corresponding threading notch opening action and threading notch blocking action.

[0028] Specifically, as Figure 2 shown, a first step surface 9 is provided between the rear end of the insertion block 8 and the outer wall of the long rod 6. When the first step surface 9 of the long rod 6 contacts the knot-pushing ring 7, the front end of the insertion block 8 is flush with the front end of the knot-pushing ring 7 or the front end of the insertion block 8 is located inside the threading notch. In this way, in the actual operation process, the first embodiment can limit the relative position relationship between the insertion block 8 and the threading notch through the first step surface 9, preventing the insertion block 8 and the long rod 6 from moving forward excessively, that is, preventing the insertion block 8 from protruding from the front end of the threading notch. At the same time, a limiting baffle 5 is also provided at the front part of the knot-pushing device body 1 in the first embodiment, and the limiting baffle 5 is located outside the long rod 6 to block the front part of the long rod 6 to prevent the front end of the long rod 6 from deflecting outwards.

[0029] As Figure 3 shown, a second chute is opened on the outer wall of the handle 3. The second chute is sequentially arranged as a U-shaped groove 10 and a wide groove 11 from the rear to the front along the length direction. Among them, the rear end of the U-shaped groove 10 penetrates through the rear end of the handle 3, and the groove width at the rear end of the U-shaped groove 10 is greater than the groove width at the front end; the front end of the wide groove 11 penetrates through the front end of the handle 3, and a second step surface 18 is provided at the rear part of the wide groove 11, a third step surface 19 is provided at the front part of the wide groove 11, and two arc grooves 17 are provided along the length direction at the bottom of the wide groove 11.

[0030] The rear part of the long rod 6 is slidably installed in the second chute, and a cylinder is provided at the rear end of the long rod 6. The cylinder is slidably installed in the U-shaped groove 10, and the front end of the cylinder can abut against the second step surface 18. On one side of the long rod 6 facing the bottom of the wide groove 11 and at a position opposite to the position of the push button 4, a groove 14 and an abutting portion 20 are sequentially arranged from back to front. A cantilever 16 protrudes from the groove wall at the rear end of the groove 14. A circular catch 15 is provided at the front end of the cantilever 16. When the insertion block 8 is located within the threading notch, the circular catch 15 can be engaged with the front arc-shaped groove 17. When the insertion block 8 is located outside the threading notch, the circular catch 15 can be engaged with the rear arc-shaped groove 17.

[0031] At this time, on the one hand, in the first embodiment, the position of the entire bayonet device 2 can be limited by the second step surface 18 and the third step surface 19 to prevent it from moving forward excessively. On the other hand, in the first embodiment, the cooperation between the circular catch 15 and the arc-shaped groove 17 can be used to remind the clinical medical staff whether the insertion block 8 has moved in place, and to prevent the long rod 6 from sliding freely within the handle 3. That is, when the insertion block 8 is inserted into the threading notch, the engagement between the circular catch 15 and the corresponding arc-shaped groove 17 can be felt through the hand feeling when pushing the push button 4, so as to know whether the insertion block 8 is inserted in place. Conversely, when the insertion block 8 needs to be pulled out of the threading notch, the engagement between the circular catch 15 and the corresponding arc-shaped groove 17 can also be felt through the hand feeling when pushing the push button 4, so as to know whether the insertion block 8 is completely pulled out. Moreover, the engagement structure and friction force between the circular catch 15 and the arc-shaped groove 17 can prevent the long rod 6 from sliding forward or backward to a certain extent. In addition, in the first embodiment, the cylinder can also be limited by the groove wall at the front end of the U-shaped groove 10 to prevent the long rod 6 from sliding out of the handle 3.

[0032] In addition, as a preference, in the first embodiment, a circular hole 12 penetrates through the position on the outer wall of the handle 3 where the arc-shaped groove 17 is provided, and it is possible to observe whether the circular catch 15 is located within the corresponding arc-shaped groove 17 through this circular hole 12. The inner side of the knot-pushing ring 7 is polished with a rubber head, and the inner hole corners are ground with a sand line, so as to improve the smoothness of the inner wall at the working position on the knot-pushing ring 7 and reduce problems such as the knot-pushing ring 7 breaking the thread or damaging the thread.

[0033] Embodiment Two

[0034] As shown in the figure, Embodiment Two provides a second knot-pushing instrument for endoscopic suture surgery. Compared with Embodiment One, the difference in Embodiment Two is that the threading hole structure of the knot-pushing ring 7 provided at the front end of the knot-pushing device body 1 in Embodiment Two is different from the threading hole structure of the knot-pushing ring 7 provided in Embodiment One.

[0035] Specifically, as shown in the figure, in the second embodiment, a wire knot rotating groove 21 is formed on the front end face of the knot pushing ring 7. A knot pushing ring hole 22 penetrates between the bottom of the wire knot rotating groove 21 and the rear end face of the knot pushing ring 7. The knot pushing ring hole 22 and the wire knot rotating groove 21 together form a wire threading hole, and the axis of the knot pushing ring hole 22 is located on one side of the axis of the wire knot rotating groove 21, forming an eccentric structure. An arc-shaped auxiliary knot pushing part 23 is further arranged on the front end face of the knot pushing ring 7. The auxiliary knot pushing part 23 is coaxially arranged with the wire knot rotating groove 21, and the auxiliary knot pushing part 23 and the knot pushing ring hole 22 are respectively arranged on both sides of the axis of the wire knot rotating groove 21. The front end face of the auxiliary knot pushing part 23 is a smooth concave surface 24 that is recessed inward in the middle, and the deepest point of the smooth concave surface 24 is coplanar with the axis of the wire knot rotating groove 21 and the axis of the knot pushing ring hole 22. At this time, the deepest point of this smooth concave surface 24 (i.e., Figure 5 point M in

[0036] can be used as the force application point for pushing the auxiliary wire, effectively preventing the auxiliary wire from slipping or falling off.

[0037] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A knot-pushing instrument for endoscopic suture surgery, comprising a knot-pushing device body (1), a handle (3) is arranged at the rear end of the knot-pushing device body (1), a knot-pushing ring (7) is arranged at the front end of the knot-pushing device body (1), a threading hole penetrates through the middle of the knot-pushing ring (7), and a threading notch is arranged on the outer wall of the knot-pushing ring (7); characterized in that, A bayonet device (2) is movably installed at the threading notch.

2. The knot-pushing instrument for endoscopic suture surgery according to claim 1, characterized in that, A thread knot rotating groove (21) is formed on the front end face of the knot pushing ring (7). A knot pushing ring hole (22) penetrates between the bottom of the thread knot rotating groove (21) and the rear end face of the knot pushing ring (7). The knot pushing ring hole (22) and the thread knot rotating groove (21) together form a threading hole, and the knot pushing ring hole (22) and the thread knot rotating groove (21) are eccentrically arranged; an arc-shaped auxiliary knot pushing part (23) is further arranged on the front end face of the knot pushing ring (7). The auxiliary knot pushing part (23) is coaxially arranged with the thread knot rotating groove (21), and the auxiliary knot pushing part (23) and the knot pushing ring hole (22) are respectively arranged on both sides of the axis of the thread knot rotating groove (21). The front end face of the auxiliary knot pushing part (23) is a smooth concave surface (24) with the middle recessed inward. The deepest point of the smooth concave surface (24) is coplanar with the axis of the thread knot rotating groove (21) and the axis of the knot pushing ring hole (22).

3. The knot-pushing instrument for endoscopic suture surgery according to claim 1, characterized in that, The threading hole is a straight hole.

4. The knot-pushing instrument for endoscopic suture surgery according to claim 1, characterized in that, The bayonet device (2) includes a long rod (6). The long rod (6) is slidably installed on the knot pusher body (1) along the length direction of the knot pusher body (1). An insertion block (8) is arranged at the front end of the long rod (6). The insertion block (8) can be inserted into and outside the threading notch; a push button (4) is arranged at the rear part of the long rod (6). The push button (4) is located outside the handle (3).

5. The knot-pushing instrument for endoscopic suture surgery according to claim 4, characterized in that, A first step surface (9) is arranged between the rear end of the insertion block (8) and the outer wall of the long rod (6). When the first step surface (9) contacts the knot pushing ring (7), the front end of the insertion block (8) is flush with the front end of the knot pushing ring (7) or the front end of the insertion block (8) is located inside the threading notch.

6. The knot-pushing instrument for endoscopic suture surgery according to claim 4, wherein A first sliding groove (13) is formed on the outer wall of the knot pusher body (1) along the length direction. The long rod (6) is slidably installed in the first sliding groove (13).

7. The knot-pushing instrument for endoscopic suture surgery according to claim 6, wherein A limit baffle (5) is arranged at the front part of the knot pusher body (1). The limit baffle (5) is located outside the long rod (6).

8. The knot-pushing instrument for endoscopic suture surgery according to claim 4, wherein A chute two is provided on the outer wall of the handle (3). The chute two is sequentially arranged as a U-shaped groove (10) and a wide groove (11) from back to front along the length direction. The rear end of the U-shaped groove (10) penetrates through the rear end of the handle (3), and the groove width at the rear end of the U-shaped groove (10) is larger than that at the front end; the front end of the wide groove (11) penetrates through the front end of the handle (3). A second step surface (18) is provided at the rear part of the wide groove (11), and a third step surface (19) is provided at the front part of the wide groove (11). Two arc-shaped grooves (17) are arranged along the length direction at the bottom of the wide groove (11); the rear part of the long rod (6) is slidably installed in the chute two, and a cylinder is provided at the rear end of the long rod (6). The cylinder is slidably installed in the U-shaped groove (10), and the front end of the cylinder can abut against the second step surface (18); on the side of the long rod (6) facing the bottom of the wide groove (11), a groove (14) and an abutting part (20) are sequentially arranged from back to front. A cantilever (16) protrudes from the groove wall at the rear end of the groove (14), and a circular clamping block (15) is provided at the front end of the cantilever (16). When the insertion block (8) is located within the wire-passing notch, the circular clamping block (15) can be clamped with the front arc-shaped groove (17), and when the insertion block (8) is located outside the wire-passing notch, the circular clamping block (15) can be clamped with the rear arc-shaped groove (17).

9. The knot-pushing instrument for endoscopic suture surgery according to claim 8, characterized in that, The push button (4) and the groove (14) are oppositely arranged on the long rod (6).

10. The knot-pushing instrument for endoscopic suture surgery according to claim 8, characterized in that, A circular hole (12) penetrates through the outer wall of the handle (3) at the position where the arc-shaped groove (17) is provided.

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