Suturing device and suturing method

Abstract

The application provides a suturing device and a suturing method, and relates to the technical field of medical instruments. The first limiting structure arranged between adjacent implants and the second limiting structure arranged between the proximal end implant and the push needle can avoid the implants from sliding out accidentally. Therefore, the limiting protrusions arranged on the puncture needle are no longer needed, the implants will not be squeezed to deform when the implants are fired, and the firing of the implants can be realized without a large pushing force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a suturing device and a suturing method. BACKGROUND

[0002] Meniscus is a semilunar cartilage between femur and tibia of knee joint, and meniscus tear is often caused by sports injury, and meniscus suturing is the most ideal operation method for treating meniscus injury at present.

[0003] The principle is that when the puncture needle passes through both sides of the meniscus tear, the fixed block 1 and the fixed block 2 with the suture are sent to both sides of the meniscus tear in turn by the push needle, and finally the purpose of suturing the meniscus is achieved by tightening the suture.

[0004] In order to avoid that the fixed block 1 and the fixed block 2 are accidentally slipped out of the puncture needle during implantation, a rigid protrusion or an elastic extrusion is arranged on the head of the puncture needle to limit the fixed block 1 and the fixed block 2, which not only causes that a larger pushing force of the push needle is needed when the fixed block is fired, but also the rigid limiting causes interference of extrusion deformation of the fixed block. In clinic, since a stronger tension is needed to keep the tissue tight, the user will pull the suture tightly, and the deformation and sliding of the implant into the puncture hole are the main causes of operation failure. SUMMARY

[0005] The present application aims to provide a suturing device and a suturing method to solve the technical problem that the existing suturing device is difficult to fire the fixed block during suturing, and the limiting protrusion causes extrusion of the fixed block, resulting in deformation.

[0006] The suture device comprises a puncture needle with a channel, at least two implants arranged in the channel from far to near and connected by a tightening line, wherein corresponding first limiting structures are arranged on adjacent implants, and the first limiting structures are configured to connect adjacent implants to each other when the implants are all in the channel, and to disconnect the farthest implant from its adjacent implant when the farthest implant is entirely out of the puncture needle; a firing mechanism comprising a push needle for pushing the implants, wherein corresponding second limiting structures are arranged on the farthest implant and the push needle, and the second limiting structures are configured to connect the farthest implant to the push needle when the farthest implant is in the channel, and to disconnect the farthest implant from the push needle when the farthest implant is entirely out of the puncture needle. When the implants are in the puncture needle, the implants are connected to each other and the farthest implant is connected to the push needle under the action of the first limiting structures and the second limiting structures, so that all the implants and the push needle are relatively stationary, thereby avoiding the implants from accidentally sliding out of the puncture needle. When the farthest implant is entirely out of the puncture needle, the first limiting structures can release the connection relationship, and the farthest implant can be disconnected from its adjacent implant, thereby realizing the firing of the farthest implant, and by analogy, the firing of the implants except the farthest implant can be completed. When the farthest implant is entirely out of the puncture needle, the second limiting structures can release the connection relationship, and the farthest implant can be disconnected from its adjacent push needle, thereby realizing the firing of the farthest implant. The first limiting structures arranged between adjacent implants and the second limiting structures arranged between the farthest implant and the push needle can avoid the implants from accidentally sliding out, so that no limiting protrusions need to be arranged on the puncture needle, the implants will not be squeezed to deform when fired, and the firing of the implants can be realized without a large pushing force, thereby reducing the risk of surgical failure caused by the entry of the implants into the puncture channel during the tightening of the line.

[0007] In an embodiment, the farthest implant is a tail-end implant, the first limiting structures comprise first protruding structures and first recessed structures capable of being clamped, and the first protruding structures and the first recessed structures are arranged on adjacent two implants respectively; the second limiting structures comprise second protruding structures and second recessed structures capable of being clamped, and the second protruding structures and the second recessed structures are arranged on the tail-end implant and the push needle respectively. The limiting connection between adjacent implants and between the tail-end implant and the push needle is realized by complementary structures, which facilitates the natural separation of the implants from the next implant or the push needle when the implants leave the puncture needle.

[0008] In one embodiment, the first protruding structure of the first limiting structure comprises a first locking rod extending from the end surface of the implant, and a first protrusion provided at the end of the first locking rod and protruding radially inwardly; the first recessed structure of the first limiting structure comprises a first recess recessed from the peripheral surface of the implant and communicating with the end of the implant, for receiving the first locking rod of the adjacent implant; and a first groove provided in the first recess and radially inwardly, for receiving the first protrusion of the adjacent implant. In the initial state, the first locking rod is located in the first recess, and the first protrusion is located in the first groove. Since the first protrusion and the first groove are both arranged radially, the cooperation between them can prevent the implants from moving away from each other in the axial direction. Only when the distal-most implant is entirely separated from the puncture needle, the distal-most implant can move relatively in the radial direction with respect to the adjacent implant, thereby releasing the limitation of the first limiting structure and achieving the firing of the distal-most implant.

[0009] In one embodiment, the second protruding structure of the second limiting structure comprises a second locking rod extending from the proximal end of the tail-end implant or the distal end of the push needle, and a second protrusion provided at the end of the second locking rod and protruding radially inwardly; the second recessed structure of the second limiting structure comprises a second recess recessed from the peripheral surface of the tail-end implant or the distal end of the push needle and communicating with the proximal end of the tail-end implant or the distal end of the push needle, for receiving the second locking rod of the adjacent tail-end implant or push needle; and a second groove provided in the second recess and radially inwardly, for receiving the second protrusion of the tail-end implant or push needle. In the initial state, the second locking rod is located in the second recess, and the second protrusion is located in the second groove. Since the second protrusion and the second groove are both arranged radially, the cooperation between them can prevent the proximal-most implant from separating from the push needle in the axial direction. Only when the proximal-most implant is entirely separated from the puncture needle, the proximal-most implant can move relatively in the radial direction with respect to the push needle, thereby releasing the limitation of the second limiting structure and achieving the firing of the proximal-most implant.

[0010] In one embodiment, the suture device comprises a wire loop provided on the peripheral wall of the implant and a wire ring arranged in the wire loop and surrounding the implant, wherein the wire loop is elongated into a strip ring shape having a first curved end and a second curved end opposite to each other, the first curved end is located on one side of the implant, and the second curved end passes through the inside of the first curved end after surrounding the implant to form a penetration ring; the distal end of the tightening wire has a sliding knot, and the proximal end forms a wire collection end, which is sequentially threaded through each penetration ring and slidably connected with the sliding knot, so as to form a tightening ring. The wire loop on the implant is wound on the peripheral side wall thereof, and the tightening of the wire loop on the peripheral side wall of the implant can be achieved by pulling the tightening wire without the need to open a through hole on the implant, thereby improving the structural strength of the implant.

[0011] In one embodiment, the number of wire clamping slots on the same implant is two, the wire loop comprises a first wire segment and a second wire segment connected to the two ends of the first curved end and the two ends of the second curved end respectively, and the first curved end, the first wire segment, the second curved end and the second wire segment form a closed loop; the first wire segment passes through one of the wire clamping slots, and the second wire segment passes through the other wire clamping slot. The number of wire clamping slots can be two, so that after the tightening wire is tightened, the wire loop can be tightly clamped on the circumferential side wall of the implant, and the circumferential side wall of the implant abuts against the tissue rear wall.

[0012] In one embodiment, the center distance between the two adjacent wire clamping slots on the same implant is less than or equal to the outer diameter of the puncture needle. The center distance between the two adjacent wire clamping slots on the same implant in the direction from the distal end to the proximal end is L, the outer diameter of the puncture needle is D, and the center distance between the two wire clamping slots in the direction from the distal end to the proximal end is less than or equal to the outer diameter of the puncture needle, i.e. L≤D. When the tightening wire is tightened, the first curved end tightly abuts against the side wall of the implant, and the first curved end is located inside the opening of the puncture needle and does not generate large friction with the tissue. If L>D, the span of the first curved end in the axial direction increases and extends to the outside of the opening of the puncture needle. At this time, the first curved end will generate friction with the tissue on the edges of the two walls of the puncture hole formed by the puncture needle, forming a "reaming effect" and increasing the risk of the implant slipping into the puncture hole.

[0013] In one embodiment, the circumferential side wall of the proximal end implant has a hiding hole to enable the sliding knot to enter the hiding hole after being tightened. The sliding knot on the gradually tightened tightening wire finally slides to the wire loop of the distal end implant and falls into the hiding hole, hiding the sliding knot and avoiding friction between the sliding knot and the tissue.

[0014] In one embodiment, the firing mechanism comprises: a handle connected with the puncture needle;

[0015] A push button in sliding connection with the handle is connected with the push needle, and a traction member in movable connection with the handle is connected with the tightening end of the tightening wire. By pushing and pulling the push button, the push needle is advanced and retracted; by pulling the traction member, the tightening wire is tightened, which is convenient to operate.

[0016] In one embodiment, the firing mechanism further comprises: a locking mechanism to lock the push button relative to the handle. After the locking mechanism is locked, the push button is stationary relative to the handle, which can avoid accidental firing of the implant by the push button.

[0017] In one embodiment, the push button comprises: at least two pushers for firing adjacent implants, the number of which is consistent with the number of implants, wherein the adjacent pushers are unlockably fixed; at least two stop structures on the handle, which are spaced along the movement path of the pushers, the number of which is consistent with the number of pushers, and the distance between adjacent two stop structures is equal to the length of the implant. When the first implant needs to be fired, the push button is pushed forward, and all the pushers move forward together. When the pusher corresponding to the first implant abuts against the corresponding stop structure, it can no longer move, at which time the first implant has just been fired. When the second implant needs to be fired, the two pushers corresponding to the first and second implants are unlocked, and the two pushers are separated. The push button is pushed forward, and all the pushers continue to move forward except the pusher corresponding to the first implant which is stopped by the stop structure. Until the push button abuts against the stop structure corresponding to the second implant, it can no longer move forward, at which time the push needle has just fired the second implant. By analogy, all implants are fired, and through the cooperation of the pushers and the stop structures, the implants can be accurately fired to avoid over-firing, and the user can operate conveniently.

[0018] In one embodiment, the pushers are sequentially sleeved from inside to outside, and the distal end faces of all the pushers are coplanar in the initial state. The inner pusher is matched with the proximal stop structure, and the outermost pusher is matched with the distal stop structure. The push button comprises a connecting piece which is unlockably connected with all the pushers from inside to outside. Thus, the multiple pushers can be sequentially unlocked from inside to outside, and the operation fluency of the surgery is improved.

[0019] The stitching method provided by the embodiment of the present application is implemented by using the above stitching device, and comprises the following steps: S1, inserting the puncture needle into one side of the tissue tear, and pushing out the first implant from the puncture needle by using the push needle; the first implant is released from the length direction of the channel after losing the stop of the puncture needle; S2, inserting the puncture needle into the other side of the tissue tear, unlocking the connection between the pusher corresponding to the previous implant and the pusher corresponding to the next implant, and pushing out the second implant from the puncture needle by pushing the push button; the second implant is released from the length direction of the channel after losing the stop of the puncture needle; S3, by analogy, until all the implants are fired, and the gathering line is pulled until the tissue is fastened. By using the above stitching device, the force required for firing the implant is smaller, and the implant does not need to pass through the extrusion of the limiting protrusion during firing, and the deformation problem is avoided. Moreover, through the cooperation of the pushers and the stop structures, the implants can be accurately fired to avoid over-firing, and the user can operate conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0021] Figure 1 A sectional view of the suturing device provided by the embodiment of the present application is provided.

[0022] Figure 2 A sectional view of the suturing device provided by the embodiment of the present application is provided. Figure 1 A partial enlarged view of position A in the above figure is provided.

[0023] Figure 3 A sectional view of the suturing device provided by the embodiment of the present application is provided. Figure 1 A partial enlarged view of position B in the above figure is provided.

[0024] Figure 4 A schematic view of the first implant and the second implant of the suturing device provided by the embodiment of the present application is provided.

[0025] Figure 5 A schematic view of the push needle of the suturing device provided by the embodiment of the present application is provided.

[0026] Figure 6 A schematic view of the connection of the first implant, the second implant and the push needle of the suturing device provided by the embodiment of the present application is provided.

[0027] Figure 7 A sectional view of the suturing device provided by the embodiment of the present application is provided. Figure 6 A partial enlarged view of position C in the above figure is provided.

[0028] Figure 8 A schematic view of the implant of the suturing device provided by the embodiment of the present application after injection is provided.

[0029] Figure 9 A sectional view of the suturing device provided by the embodiment of the present application is provided. Figure 6 A partial enlarged view of position D in the above figure is provided.

[0030] Figure 10 A sectional view of the suturing device provided by the embodiment of the present application is provided. Figure 9 A partial enlarged view of position E in the above figure is provided.

[0031] Figure 11 A schematic view of the suturing device provided by the embodiment of the present application when the first implant is fired is provided.

[0032] Figure 12 A schematic view of the suturing device provided by the embodiment of the present application when the second implant is fired is provided.

[0033] Figure 13 A schematic view of the suturing device provided by the embodiment of the present application after the suture is tightened is provided.

[0034] Figure 14 A schematic view of the suture device before firing the first implant is provided for the embodiment of the present application;

[0035] Figure 15 A schematic view of the suture device after firing the first implant and before firing the second implant is provided for the embodiment of the present application;

[0036] Figure 16 A schematic view of the suture device after firing the second implant is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the protection scope of the present application.

[0038] As shown in the drawings, Figures 1-6 The suture device provided by the embodiment of the present application comprises a puncture needle 410 with a channel. The puncture needle 410 can be linear or curved with an arc.

[0039] The suture device further comprises at least two implants arranged in the channel from far to near and connected by a tightening line. The number of implants can be two, three, four or even more.

[0040] The implants are generally cylindrical. When the push needle 440 moves forward, it pushes all the implants to move together. The farthest implant can first leave the puncture needle 410. Continue to push the push needle 440, and the next implant leaves the puncture needle 410. The farthest implant mentioned in the present application refers to the implant located at the farthest end in the current firing process. When the firing of the previous implant is completed and the next firing process is entered, the next implant becomes the new farthest implant.

[0041] The first limiting structure is arranged correspondingly on the adjacent implants. When the implants are all located in the channel, the first limiting structure connects the adjacent implants to each other. When the farthest implant is entirely out of the puncture needle, the first limiting structure makes the farthest implant separate from its adjacent implant, thereby completing the firing of the implant. The second limiting structure is arranged correspondingly on the distal end of the push needle and the farthest implant. When the farthest implant is located in the channel, the second limiting structure connects the farthest implant to the push needle. When the farthest implant is entirely out of the puncture needle, the second limiting structure makes the farthest implant separate from the push needle, thereby completing the firing of the farthest implant.

[0042] For the convenience of describing the structure and principle of the device, the number of implants in this embodiment is set to two, and is set to the first implant 100 and the second implant 200, wherein the first implant 100 is closer to the outlet of the puncture needle, and the second implant 200 is closer to the push needle.

[0043] The principle that the first implant 100 and the second implant 200 do not accidentally slide out is as follows: when the first implant 100 and the second implant 200 are both located in the puncture needle 410, under the action of the first limiting structure and the second limiting structure, the first implant 100, the second implant 200 and the push needle 440 are connected with each other, and remain relatively static, so as to avoid the first implant 100 and the second implant 200 from accidentally sliding out of the puncture needle 410, and when the first implant 100 as a whole leaves the puncture needle 410, the first limiting structure separates the first implant 100 from the second implant 200; similarly, when the second implant 200 as a whole leaves the puncture needle 410, the second limiting structure separates the second implant 200 from the push needle 440. By setting the first limiting structure between the first implant 100 and the second implant 200, and the second limiting structure between the second implant 200 and the push needle 440, the accidental sliding out of the first implant 100 and the second implant 200 can be avoided, so that the limiting protrusion does not need to be set on the puncture needle 410, the first implant 100 and the second implant 200 are not squeezed to deform when being fired, and a large pushing force is not needed to achieve the firing of the first implant 100 and the second implant 200.

[0044] The most proximal implant is the tail end implant, the first limiting structure includes a first protruding structure and a first recess structure capable of being clamped, and the first protruding structure and the first recess structure are respectively arranged on the adjacent two implants; the second limiting structure includes a second protruding structure and a second recess structure capable of being clamped, and the second protruding structure and the second recess structure are respectively arranged on the tail end implant and the push needle. The limiting connection between the adjacent two implants and between the tail end implant and the push needle is achieved through the complementary concave-convex structure, which is convenient for limiting in the axial direction when the implant is in the puncture needle channel, and naturally separates from the next implant or the push needle 440 when the implant as a whole leaves the puncture needle 410. The tail end implant is the second implant 200 mentioned in this embodiment.

[0045] According to the use scene of the device, the side close to the patient of the device is the front side, and the side close to the user of the device is the rear end, the end of the implant facing the front side is the front end, and the end facing the rear side is the rear end.

[0046] In the embodiment, the first protruding structure of the first limiting structure comprises a first locking rod 110 extending from the end face of the implant, and a first protrusion 120 protruding radially inward at the end of the first locking rod 110; the first recessed structure of the first limiting structure comprises a first recess 210 recessed from the peripheral surface of the implant and communicating with the end of the implant, for accommodating the first locking rod 110 of the adjacent implant; and a first groove 220 radially inward in the first recess 210, for accommodating the first protrusion 120 of the adjacent implant.

[0047] Specifically, the first protruding structure can comprise a first locking rod 110 extending from the rear end face of the first implant 100 to the rear side, and a first protrusion 120 protruding radially inward on the first locking rod 110; the first recessed structure comprises a first recess 210 recessed inward from the peripheral side wall of the second implant 200, the first recess 210 communicates with the end face of the second implant 200 facing the first implant 100, and a first groove 220 radially inward is arranged in the first recess 210, the first recess 210 is used to accommodate the first locking rod 110, so that the first protrusion 120 can be inserted radially into the first groove 220.

[0048] Alternatively, the first protruding structure comprises a first locking rod 110 extending from the front end face of the second implant 200 to the front side, and a first protrusion 120 protruding radially inward on the first locking rod 110; the first recessed structure comprises a first recess 210 recessed inward from the peripheral side wall of the first implant 100, the first recess 210 communicates with the end face of the first implant 100 facing the second implant 200, and a first groove 220 radially inward is arranged in the first recess 210, the first recess 210 is used to accommodate the first locking rod 110, so that the first protrusion 120 can be inserted radially into the first groove 220.

[0049] In the embodiment, the second protruding structure of the second limiting structure comprises a second locking rod 441 extending from the proximal end of the tail-end implant or the distal end of the push needle, and a second protrusion 442 protruding radially inward at the end of the second locking rod 441; the second recessed structure of the second limiting structure comprises a second recess 230 recessed from the peripheral surface of the proximal end of the tail-end implant or the distal end of the push needle, for accommodating the second locking rod 441 of the adjacent tail-end implant or push needle 440; and a second groove 240 radially inward in the second recess, for accommodating the second protrusion 442 of the adjacent tail-end implant or push needle 440.

[0050] Specifically, the second protruding structure comprises a second locking rod 441 extending from the front end face of the push needle 440 towards the front side, and a second protrusion 442 protruding radially inward is arranged on the second locking rod 441; the second recessed structure comprises a second recess 230 recessed inward from the circumferential side wall of the second implant 200, the second recess 230 is in communication with the end face of the second implant 200 facing the push needle 440, and a second groove 240 radially inward is arranged in the second recess 230, the second recess 230 is used for accommodating the second locking rod 441, so that the second protrusion 442 can be inserted into the second groove 240 radially.

[0051] Alternatively, the second protruding structure comprises a second locking rod 441 extending from the rear end face of the second implant 200 towards the rear side, and a second protrusion 442 protruding radially inward is arranged on the second locking rod 441; the second recessed structure comprises a second recess 230 recessed inward from the circumferential side wall of the push needle 440, the second recess 230 is in communication with the end face of the push needle 440 facing the second implant 200, and a second groove 240 radially inward is arranged in the second recess 230, the second recess 230 is used for accommodating the second locking rod 441, so that the second protrusion 442 can be inserted into the second groove 240 radially.

[0052] When the implant is in the channel of the puncture needle, the first protrusion 120 is located in the first groove 220, preventing relative movement in the axial direction, and similarly, the second protrusion 442 is located in the second groove 240, preventing relative movement in the axial direction. When the implant as a whole slides out of the channel of the puncture needle, the first protrusion 120 and the first groove 220, or the second protrusion 442 and the second groove 240, can have relative movement in the radial direction, so as to realize the separation of the implant and the implant or the implant and the push needle.

[0053] As Figure 6As shown, in this embodiment, the first locking rod 110 is disposed on the first implant 100, and the first recess 210 and the first groove 220 are disposed on the second implant 200; the second locking rod 441 is disposed on the push rod, and the second recess 230 and the second groove 240 are disposed on the second implant 200. In the initial state, the first locking rod 110 is located in the first recess 210, and the first protrusion 120 is located in the first groove 220. Because both the first protrusion 120 and the first groove 220 extend radially, their cooperation can axially prevent the first implant 100 from moving away from the second implant 200. When the first implant 100 is completely removed from the puncture needle 410, the first implant 100 is free in the radial direction, and the first protrusion 120 moves radially along the first groove 220, thereby separating from the first groove 220. The first implant 100 can then be separated from the second implant 200, thereby realizing the firing of the first implant 100. Similarly, the second locking rod 441 is located in the second recess 230, and the second protrusion 442 is located in the second groove 240. Only when the second implant 200 is completely removed from the puncture needle 410 can the second implant 200 be separated from the push needle 440, thereby realizing the firing of the second implant 200.

[0054] like Figures 7-10 As shown, the suture device includes: a suture groove 130 disposed on the peripheral wall of the implant; a suture loop placed in the suture groove 130 and surrounding the implant, wherein the suture loop is stretched into a ring shape, having a first curved end 421 and a second curved end 423 opposite to each other in the stretching direction; the first curved end 421 is located on one side of the implant; the second curved end 423 surrounds the implant and passes through the inside of the first curved end to form an insertion loop; the distal end of the tightening suture 310 has a slip knot 311, and the proximal end forms a take-up end 312, which passes through each insertion loop in sequence and slides to connect with the slip knot 311 so that the tightening suture 310 forms a tightening loop.

[0055] The thread loop on the implant is wound around its circumferential sidewall. After the thread loop is wound around the sidewall of the implant, the loop is stretched into a long ring. The thread loop can be regarded as a closed loop formed by the first curved end 421, the first segment 422, the second curved end 423, and the second segment 424 connected end to end. The second curved end 423 is wound around the implant and then inserted into the inside of the first curved end 421. Then, the tightening thread 310 passes through the insertion loop 425 formed between the second curved end 423 and the first curved end 421. After the tightening thread 310 is tightened, the thread loop can be clamped to the sidewall of the implant to form a stable connection. At the same time, the thread loop is wound around the circumferential sidewall of the implant, without the need to open through holes in the implant, thus improving the structural strength of the implant.

[0056] The number of wire clamping grooves 130 on the same implant is two, the wire loop includes a first wire segment 422 and a second wire segment 424 connected with two ends of the first curved end 421 and two ends of the second curved end 423 respectively, and the first curved end 421, the first wire segment 422, the second curved end 423 and the second wire segment 424 form a closed loop; the first wire segment 422 passes through one of the wire clamping grooves 130, and the second wire segment 424 passes through the other wire clamping groove 130.

[0057] The number of wire clamping grooves 130 on the same implant can be two, and the two wire clamping grooves 130 are arranged at intervals along the axial direction of the implant. The two wire clamping grooves 130 can be arranged at the middle position of the implant. The first wire segment 422 passes by one of the wire clamping grooves 130, and the second wire segment 424 passes by the other wire clamping groove 130, so that the tightening wire 310 can be tightly clamped on the circumferential side wall of the implant after being tightened, and the circumferential side wall of the implant abuts against the tissue rear wall.

[0058] The center distance between the two adjacent wire clamping grooves 130 on the same implant can be less than or equal to the outer diameter of the puncture needle 410.

[0059] As shown in Figure 8 , the implant has a distal end close to the outlet of the puncture needle 410 and a proximal end away from the outlet of the puncture needle 410. The center distance of the two wire clamping grooves 130 in the direction from the distal end to the proximal end is L, and the outer diameter of the puncture needle 410 is D, L≤D. The center distance of the two wire clamping grooves 130 in the direction from the distal end to the proximal end is less than or equal to the outer diameter of the puncture needle 410. When the tightening wire 310 is tightened, the first curved end 421 is tightly attached to the side wall of the implant, and the first curved end 421 is located inside the opening of the puncture needle 410, and does not generate large friction with the tissue. If L>D, the length of the first curved end 421 in the axial direction increases and extends to the outside of the opening of the puncture needle 410. At this time, the first curved end 421 will generate friction with the tissue.

[0060] As shown in Figure 10 , the circumferential side wall of the second implant 200 has a hiding hole 260. The first curved end 421 and the second curved end 423 of the wire loop on the second implant 200 cross and pass through the hiding hole 260, so that the penetrating ring 425 can enter the hiding hole 260 after the wire loop is tightened.

[0061] The hiding hole 260 can be located at the middle position of the opposite sides of the two wire clamping grooves 130. The sliding knot 311 on the gradually tightened tightening wire 310 finally slides to the wire loop and falls into the hiding hole 260, hiding the sliding knot 311 and avoiding friction between the sliding knot 311 and the tissue.

[0062] The firing mechanism comprises a handle 510, the puncture needle 410 is connected with the handle 510; a push button, the push button is in sliding connection with the handle 510, and the push button is connected with the push needle 440. By pushing and pulling the push button, the push needle 440 is advanced and retreated, and the operation is convenient.

[0063] The handle 510 is movably connected with a traction member, and the tightening end of the tightening wire 310 is connected with the traction member.

[0064] The traction member can be a rivet 580, and the handle 510 can be provided with a jack connected with the rivet 580. Initially, the rivet 580 is inserted into the jack of the handle 510, and after the firing of all implants is completed, the rivet 580 can be pulled out of the handle 510, and the tightening of the tightening wire 310 is realized by pulling the traction member.

[0065] The firing mechanism further comprises a locking mechanism to lock the push button relative to the handle. After the locking mechanism is locked, the push button is stationary relative to the handle 510, and accidental firing of the implant by the push button can be avoided.

[0066] Specifically, the push button is provided with a first pin hole; the handle 510 is provided with a second pin hole; the locking mechanism comprises a locking pin 520, and the locking pin 520 can pass through the first pin hole and the second pin hole to lock the push button. When the implant needs to be fired, the locking pin 520 needs to be pulled out of the first pin hole and the second pin hole, so as to release the restriction between the push button and the handle 510.

[0067] The push button comprises: at least two pushers for firing adjacent implants, the number of which is consistent with the number of implants, wherein adjacent pushers are unlockedly fixed; at least two stop structures are arranged on the handle along the movement path of the pusher, the number of which is consistent with the number of pushers, and the distance between adjacent two stop structures is equal to the length of the implant.

[0068] In the embodiment, the number of implants is two, so the number of pushers and stop structures is two, adjacent pushers can be unlockedly fixed through the connecting member 550, the number of connecting members 550 can be one, and in order to facilitate the description, the pusher and the stop structure corresponding to the first implant 100 are respectively the first pusher 530 and the first stop structure 560, and the pusher and the stop structure corresponding to the second implant 200 are respectively the second pusher 540 and the second stop structure 570.

[0069] Specifically, the push button may include a first push part 530 and a second push part 540, which are connected by a detachable connector 550; the second push part 540 is connected to the push needle 440; a first stop structure 560 is provided on the handle 510, which is located on the sliding path of the first push part 530 and is used to prevent the first push part 530 from continuing to advance after the first implant 100 is fully fired; a second stop structure 570 is provided on the handle 510, which is located on the sliding path of the second push part 540 and is used to prevent the second push part 540 from continuing to advance after the second implant 200 is fully fired.

[0070] like Figures 11-16 As shown, the first pushing part 530 and the second pushing part 540 are arranged from the inside out. The push button has a stepped structure that gradually increases in height from back to front. The first stop structure 560 is one of the vertical stepped surfaces of the stepped structure, and the second stop structure 570 is the other vertical stepped surface. The second stop structure 570 is higher than the first stop structure 560, and the bottom surface of the second pushing part 540 is higher than the bottom surface of the first pushing part 530. When the first implant 100 needs to be fired, the push button is pushed forward, and the first pushing part 530 and the second pushing part 540 move forward together. When the first pushing part 530 comes into contact with the first stop structure 560, it can no longer move, at which point the first implant 100 is fired. When the second implant 200 needs to be fired, the connector 550 is removed, the first pusher 530 and the second pusher 540 are separated, and the second pusher 540 is pushed forward a distance equal to the length of the implant until the second pusher 540 comes into contact with the second stop structure 570 and can no longer move forward. At this time, the pusher 440 just fires the second implant 200. The first stop structure 560 and the second stop structure 570 can accurately fire the first implant 100 and the second implant 200, which is convenient for the user to operate.

[0071] The push parts are sequentially installed from the inside out, and the far ends of all the push parts are coplanar in the initial state. The innermost push part matches the near end of the stop structure, and the outermost push part matches the farthest end of the stop structure. The push button includes a connector 550, which is detachably and securely connected to all the push parts from the inside out.

[0072] The connecting piece 550 can be rod-shaped, and a plurality of pushing parts can be connected in sequence from inside to outside by one connecting piece 550. Initially, all the pushing parts are connected into one whole by the connecting piece 550. After the first implant is completed, the connecting piece 550 can be pulled out by a certain length, so that the pushing part corresponding to the first implant is separated from the pushing part corresponding to the second implant. After the second implant is completed, the connecting piece 550 can be pulled out by a certain length again, so that the pushing part corresponding to the second implant is separated from the pushing part corresponding to the third implant, and so on, so that the implantation of all implants is gradually completed.

[0073] The outer side of the puncture needle 410 is slidably connected with the depth limiter tube 600, and can be fixed when sliding to the expected position, so that the distance between the front end of the depth limiter tube 600 and the front end of the puncture needle 410 is adjustable. The position of the depth limiter tube 600 can be adjusted before puncture, so that the puncture depth of the puncture needle 410 is fixed, and the accuracy of puncture by the user is improved.

[0074] The suture method provided by the embodiment of the present application is implemented by using the above suture device, and includes the following steps: S1, the puncture needle 410 is inserted into one side of the tissue tear, and the first implant is pushed out from the puncture needle 410 by using the needle pushing part 440; after the first implant loses the stop of the puncture needle 410, it is released from the length direction of the channel; S2, the puncture needle 410 is inserted into the other side of the tissue tear, the connection between the pushing part corresponding to the previous implant and the pushing part corresponding to the next implant is unlocked, and the second implant is pushed out from the puncture needle 410 by using the pushing button; after the second implant loses the stop of the puncture needle 410, it is released from the length direction of the channel; S3, the above steps are sequentially repeated until all the implants are implanted, and then the traction line 310 is pulled until the tissue is fastened. By using the above suture device, the force required for implantation is smaller, and the implantation does not need to pass through the extrusion of the limiting protrusion, so that the deformation problem is avoided. Moreover, the implantation can be accurately implanted by the cooperation of the pushing part and the stop structure, the over-implantation is avoided, and the user operation is facilitated.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A suturing device, characterized in that, include: A puncture needle with a channel; At least two implants positioned from far to near within the channel and connected by a tightening wire. A first limiting structure is correspondingly provided on adjacent implants, which is configured as follows: When all the implants are located within the channel, the first limiting structure connects adjacent implants to each other. When the distal implant is completely protruded from the puncture needle, the first limiting structure causes the distal implant to detach from the implant adjacent to the distal implant. The firing mechanism includes a pusher for advancing the implant. The implant at its closest end and the distal end of the push needle are respectively provided with a second limiting structure, which is configured as follows: When the nearest implant is located within the channel, the second limiting structure connects the nearest implant to the push pin. When the implant at the proximal end is completely protruded from the puncture needle, the second limiting structure disengages the implant at the proximal end from the push needle. include: The groove for securing the wire is located on the peripheral wall of the implant. A wire loop placed within the suture groove and surrounding the implant. The loop is stretched into a ring shape and has a first curved end and a second curved end opposite to each other in the stretching direction of the loop. The first curved end is located on one side of the implant, and the second curved end passes through the inside of the first curved end after wrapping around the implant to form an insertion loop. The distal end of the tightening line has a slip knot, and the proximal end forms a take-up end. The take-up end passes through each insertion loop in sequence and then slides to connect with the slip knot, so that the tightening line forms a tightening loop.

2. The suturing device according to claim 1, characterized in that, in, The implant described at the nearest end is a tail implant. The first limiting structure includes a first protruding structure and a first recessed structure that can be snapped together, and the first protruding structure and the first recessed structure are respectively disposed on two adjacent implants; The second limiting structure includes a second protruding structure and a second recessed structure that can be engaged, and the second protruding structure and the second recessed structure are respectively disposed on the tail implant and the push needle.

3. The suturing device according to claim 2, characterized in that, The first protruding structure of the first limiting structure includes: A first locking rod extending from the end face of the implant. A first protrusion is provided at the end of the first locking bar and protrudes inward radially; The first recessed structure of the first limiting structure includes: A first recess, connected to the end of the implant and recessed from the periphery of the implant, is used to receive a first locking rod of an adjacent implant; A first groove, disposed in the first recess and radially inward, is used to receive a first protrusion of the adjacent implant.

4. The suturing device according to claim 3, characterized in that, The second protruding structure of the second limiting structure includes: A second locking rod extends from the proximal end of the tail implant or the distal end of the push needle. A second protrusion is provided at the end of the second locking rod and protrudes inward in a radial direction; The second recessed structure of the second limiting structure includes: A second recess, connected to the proximal end of the tail implant or the distal end of the push needle and recessed from its circumference, is used to receive the second locking rod of the adjacent tail implant or push needle. The second groove, which is located in the second recess and extends radially inward, is used to receive the second protrusion of the tail implant or push needle.

5. The suturing device according to claim 4, characterized in that, The same implant has two suture slots. The suture loop includes a first line segment and a second line segment that are respectively connected to the two ends of the first curved end and the two ends of the second curved end. The first curved end, the first line segment, the second curved end, and the second line segment form a closed loop. The first line segment passes through one of the suture slots, and the second line segment passes through the other suture slot.

6. The suturing device according to claim 5, characterized in that, The center-to-center distance between two adjacent suture grooves on the same implant is less than or equal to the outer diameter of the puncture needle.

7. The suturing device according to claim 5, characterized in that, The implant at the proximal end has a concealment hole on its circumferential sidewall so that the slip knot can be inserted into the concealment hole after tightening.

8. The suturing device according to any one of claims 3-7, characterized in that, The firing mechanism includes: A handle, which is connected to the puncture needle; A push button that is slidably connected to the handle is connected to the push pin; A traction member is movably connected to the handle, and it is connected to the tightening end of the tightening line.

9. The suturing device according to claim 8, characterized in that, The firing mechanism further includes: A locking mechanism is provided so that the push button is lockably fixed relative to the handle.

10. The suturing device according to claim 8, characterized in that, The push button includes: At least two actuating parts for firing adjacent implants, the number of which is consistent with the number of implants, wherein the adjacent actuating parts are detachably fixed together; At least two stop structures are spaced apart on the handle along the movement path of the pusher, the number of which is the same as the number of pushers, and the distance between two adjacent stop structures is equal to the length of the implant.

11. The suturing device according to claim 10, characterized in that, The pushing parts are sequentially nested from the inside out, and the distal surfaces of all the pushing parts are coplanar in the initial state. Among them, the innermost pushing part matches the near end of the stop structure, and the outermost pushing part matches the farthest end of the stop structure. The push button includes: The connector, from the inside out, can be detachably and securely connected to all the pushing parts.

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