Medical lock and cut integrated device

Abstract

This application provides a medical locking and cutting integrated device, including a base component, a locking pin component, a suture locking component, and a suture cutting component. The base component includes a first base, a support member, and a mating member; the distal end of the support member is fixedly connected to the first base; the mating member is disposed on the support member. The locking pin component includes a locking pin body and a suture clamping member movably connected to the locking pin body; the locking pin body is detachably disposed within the first base. The suture locking component includes a push rod, the distal end of which is detachably connected to the locking pin body, and the two have a mutually cooperating self-locking structure; the push rod moves forward to drive the suture clamping member to move relative to the locking pin body to lock the medical suture; the self-locking structure prevents the push rod from moving backward under the action of the medical suture. The suture cutting component is slidably connected to the support member and is used to cooperate with the mating member to cut the medical suture extending from the locking pin body. This medical locking and cutting integrated device integrates suture locking and suture cutting functions, and ensures that the medical suture is always locked during the suture cutting operation.

Description

Technical Field

[0001] This application relates to the field of medical devices, specifically to a medical locking and cutting integrated device. Background Technology

[0002] During surgery, it is often necessary to tie and fix medical sutures (including but not limited to sutures, repair sutures used as artificial tendineae, repair sutures for edge-to-edge repair of valves, etc.) and remove excess medical sutures.

[0003] Traditional surgical procedures are performed under direct visualization through an incision, typically with the surgeon manually tying knots to secure the sutures before removing excess. With advancements in technology, minimally invasive and interventional surgeries are becoming increasingly common, such as laparoscopic surgery and transcatheter interventional procedures. These procedures require only a small incision in the patient's body to insert instruments like endoscopes or interventional catheters to the intended treatment site. In these procedures, the operator usually needs to remotely manipulate the sutures from outside the patient's body through this small incision to tie knots and remove excess sutures. Currently, the suture-locking device and the suture-cutting device are usually two separate instruments. Generally, the suture-locking device is inserted first, and the locking pins within the device are used to secure the suture. The suture-locking device is then removed, and the suture-cutting device is then inserted to remove excess sutures. On the one hand, the separate insertion and removal of the suture locking device and the suture cutting device into the patient's body can lead to complicated surgical procedures and a longer overall surgical time. On the other hand, the suture cutting process after suture locking often requires pulling the medical suture proximally, which may reduce the locking force of the suture by the locking pin, or even cause the medical suture to loosen from the locking pin and the locking pin to fall off, posing a risk to the human body. Summary of the Invention

[0004] The purpose of this application is to provide a medical locking and cutting integrated device that integrates locking and cutting functions, and ensures that the medical suture is always locked during the cutting operation.

[0005] The medical locking and cutting integrated device provided in this application includes: a base component, a locking pin component, a suture locking component, and a suture cutting component. The base component includes a first base, a support member, and a mating member. The distal end of the support member is fixedly connected to the first base, and the mating member is disposed on the support member. The locking pin component includes a locking pin body and a pressure member movably connected to the locking pin body. The locking pin body is detachably disposed within the first base. The suture locking component includes a push rod; the distal end of the push rod is detachably connected to the locking pin body, and the two have a mutually cooperating self-locking structure; the push rod moves forward to drive the pressure member to move relative to the locking pin body to lock the medical suture located between the pressure member and the locking pin body; the self-locking structure prevents the push rod from moving backward under the action of the medical suture. The suture cutting component is slidably connected to the support member, and the suture cutting component cooperates with the mating member to cut the medical suture extending from the locking pin body.

[0006] The medical locking and cutting integrated device provided in this application connects the locking pin component, the locking suture component, and the cutting suture component together through the base component, thereby integrating the locking and cutting suture functions into one unit. The locking and cutting operations can be completed in a single intervention, reducing the number of times the instrument needs to be inserted into the body during surgery, simplifying the surgical procedure, and saving surgical time. During the cutting suture operation, the distal end of the push rod in the locking pin component and the self-locking structure on the locking pin body of the locking pin component can maintain the position of the locking pin component locking the medical suture, ensuring that the medical suture is always locked. This prevents the medical suture from loosening from the locking pin component, prevents the locking pin component from falling off, and eliminates the risk to the human body caused by the locking pin component falling off. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some implementation methods provided by the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a three-dimensional assembly schematic diagram of a medical locking and cutting integrated device provided in one embodiment of this application;

[0009] Figure 2 yes Figure 1 An axial sectional view of the medical locking and cutting integrated device shown.

[0010] Figure 3 yes Figure 1 An exploded three-dimensional view of the medical locking and cutting integrated device shown.

[0011] Figure 4 yes Figure 1 The diagram shows a three-dimensional assembly of the medical locking and cutting integrated device with the sleeve removed from one perspective.

[0012] Figure 5 yes Figure 1 The diagram shows a three-dimensional assembly of the medical locking and cutting integrated device with the sleeve removed from another perspective.

[0013] Figure 6 This is a three-dimensional assembly diagram of the base component removing the sleeve in the medical locking and cutting integrated device;

[0014] Figure 7 This is a schematic axial cross-sectional view of the removal sleeve of the base component in the medical locking and cutting integrated device;

[0015] Figure 8 It is a three-dimensional schematic diagram of the supporting components and mating components in the base structure assembled together;

[0016] Figure 9 , Figure 10 , Figure 11 It is a three-dimensional schematic diagram of the first matrix in the matrix component from different perspectives;

[0017] Figure 12 This is a three-dimensional assembly diagram of the locking pin component in a medical locking and cutting integrated device from one perspective;

[0018] Figure 13 This is a three-dimensional assembly diagram of the locking pin component in a medical locking and cutting integrated device from another perspective;

[0019] Figure 14 This is a three-dimensional exploded view of the locking pin component;

[0020] Figure 15 This is a schematic diagram of the locking pin component after the cover plate has been removed;

[0021] Figure 16 This is a schematic cross-sectional view of the main body of the locking pin in the locking pin assembly along the axial direction;

[0022] Figure 17 This is a three-dimensional schematic diagram of the tangent component in a medical locking and cutting integrated device;

[0023] Figure 18 and Figure 19 A schematic diagram illustrating the process of locking medical wires using a medical locking and cutting integrated device;

[0024] Figure 20 A schematic diagram of the tangent line of a medical locking and cutting integrated device;

[0025] Figure 21 This is a schematic diagram showing the separation of the locking pin component from the first base.

[0026] Figure 22 A three-dimensional schematic diagram of the medical suture after it has been fixed to the locking pin component and detached from the first substrate. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Furthermore, the following descriptions of the embodiments are with reference to the accompanying illustrations, which illustrate specific embodiments in which this application can be implemented. Directional terms used in this invention, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and are not intended to indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0029] Orientation Definitions: For clarity, during the procedure, the end closer to the operator is referred to as the "proximal end," and the end farther from the operator is referred to as the "distal end." "Axial" refers to the direction parallel to the line connecting the center of the distal end and the proximal end of the medical device. "Radial" refers to the direction perpendicular to or approximately perpendicular to the axial direction. "Circumferential" refers to the direction surrounding the axial direction. These definitions are for convenience only and should not be construed as limiting this application.

[0030] Please see Figure 1 One embodiment of this application provides a medical locking and cutting integrated device 100 for locking medical sutures 200 and cutting off excess medical sutures 200.

[0031] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 The medical locking and cutting integrated device 100 includes a base component 10, a locking pin component 20, a suture locking component 30, and a suture cutting component 50. The locking pin component 20 is detachably mounted on the base component 10. The suture locking component 30 is detachably connected to the locking pin component 20 and is used to drive the locking pin component 20 to lock the medical suture 200. The suture cutting component 50 is slidably connected to the base component 10 and is used to cut off excess medical suture 200 extending from the locking pin component 20.

[0032] Please refer to the following: Figures 2 to 5 , Figure 6 , Figure 7 and Figure 8The base component 10 includes a first base 11, a support member 13, and a mating member 15. The distal end of the support member 13 is fixedly connected to the first base 11. The mating member 15 is disposed on the support member 13.

[0033] Please refer to the following: Figures 2 to 5 and Figures 12 to 14 The locking pin component 20 includes a locking pin body 21 and a pressure wire member 23 movably connected to the locking pin body 21. The locking pin body 21 is detachably disposed within the first base 11.

[0034] Please refer to the following: Figures 2 to 5 The suture locking component 30 includes a push rod 31, the distal end of which is detachably connected to the locking pin body 21, and the two have a self-locking structure 210 that cooperates with each other. The push rod 31 moves forward to drive the pressure member 23 to move relative to the locking pin body 21, thereby locking the medical suture 200 located between the pressure member 23 and the locking pin body 21. The self-locking structure 210 is used to prevent the push rod 31 from moving backward under the action of the medical suture 200. Here, "forward" refers to movement from proximal to distal, and "reverse" refers to movement from distal to proximal. During the subsequent suture cutting process, the medical suture 200 needs to be pulled proximally. The pressure member 23 tends to move in the opposite direction under the influence of the medical suture 200. Without the self-locking structure 210, the push rod 31 might be driven to move in the opposite direction by the pressure member 23, leading to a decrease in the locking force of the locking pin component 20 on the medical suture 200, or even causing the medical suture to loosen from the locking pin component and the locking pin component to fall off. It is precisely because of the self-locking structure 210 that after the push rod 31 moves forward to drive the pressure member 23 to move relative to the locking pin body 21 to lock the medical suture 200 located between the pressure member 23 and the locking pin body 21, the pulling force on the medical suture 200 during the suture cutting process is insufficient to overcome the self-locking effect of the self-locking structure 210. The push rod 31 maintains the position of locking the medical suture 200 and will not move in the opposite direction under the influence of the medical suture 200. In this embodiment, the self-locking structure 210 includes an external thread 311 (e.g., ...) located at the distal end of the push rod 31. Figure 2 and Figure 3 (as shown) and a threaded hole 211 (as shown) located near the end of the locking pin body 21 and adapted to the external thread. Figure 2 As shown in the diagram, the push rod 31 and the locking pin body 21 achieve self-locking through a threaded self-locking structure 210. Rotating the push rod 31 unlocks the connection between the push rod 31 and the locking pin body 21, while stopping the rotation of the push rod 31 establishes self-locking between the internal and external threads, making the operation simple and convenient. It can be understood that the self-locking structure 210 is not limited to a threaded connection; the push rod 31 and the locking pin body 21 can also achieve self-locking through other methods, such as a snap-fit ​​connection.

[0035] Please refer to the following: Figures 2 to 5 , Figure 17 and Figure 20The tangent member 50 is slidably connected to the support member 13. The tangent member 50 is used to cooperate with the mating member 15 to cut the medical suture 200 extending from the self-locking nail body 21.

[0036] Taking the medical suture 200 as an example of a repair suture for an artificial chordae tendineae, after the suture is cut, the locking pin body 21 is easily dislodged from the first base 11 under the pull of the heartbeat. During this process, the pull of the heartbeat on the medical suture 200 is towards the distal end, and the force of the medical suture 200 on the pressure member 23 is also towards the distal end, which will make the locking pin member 20 squeeze the medical suture 200 even tighter.

[0037] Specifically, please refer to Figure 9 , Figure 10 and Figure 11 , combined Figures 3 to 6 The first base 11 includes a first mounting portion 111 and a second mounting portion 113 fixedly connected. The first mounting portion 111 is located at the proximal end of the first base 11. The first mounting portion 111 has an axially penetrating through groove 1111 for receiving the support member 13. The proximal end of the first mounting portion 111 has a step 1113 for engaging with the tangential member 50. In this embodiment, the step 1113 is formed by removing a portion of material radially from the proximal end of the first mounting portion 111. The second mounting portion 113 has an axially penetrating receiving groove 1131 for receiving the locking pin body 21.

[0038] Please refer to the following: Figures 3 to 6 , Figure 7 and Figure 9 The support member 13 extends axially. The distal end of the support member 13 is fixedly connected to the through groove 1111. The support member 13 has an axially extending through channel 131 communicating with the receiving groove 1131 for inserting the push rod 31. The through channel 131 communicates with the threaded hole 211 (e.g., ...). Figure 2 (As shown). The push rod 31 is movably inserted into the insertion channel 131. The insertion channel 131 provides limiting and guiding functions for the push rod 31.

[0039] Please refer to the following: Figures 1 to 6The base component 10 also includes a second base 16 and a sleeve 17. The second base 16 is fixed to the proximal end of the support member 13. The mating member 15 is located between the tangential member 50 and the second base 16. The sleeve 17 is sleeved over the first base 11, the tangential member 50, the mating member 15, and the second base 16. The two ends of the sleeve 17 are respectively fixedly connected to the first base 11 and the second base 16. The second base 16 and the first base 11 jointly support the sleeve 17. The sleeve 17 is provided with a wire hole 171 for leading out the medical suture 200 extending from the locking nail body 21. The sleeve 17 is generally cylindrical. The sleeve 17 improves the uniformity and smoothness of the surface of the medical locking and cutting integrated device 100, thereby improving the smoothness of the medical locking and cutting integrated device 100 in blood vessels. In this embodiment, combined with Figures 9 to 11 The outer contour of the second mounting portion 113 of the first base 11 is circular and has a large diameter to allow the distal end face of the sleeve 17 to fit. The outer contour of the distal end of the first mounting portion 111 is roughly circular, but with a slightly smaller diameter to fit with the inner wall of the sleeve 17. It is understood that the shape of the sleeve 17 is not limited.

[0040] The base component 10 also includes positioning elements 18. The mating component 15 has a first positioning hole 151, and the sleeve 17 has a second positioning hole 173 penetrating the side wall of the sleeve 17. The positioning elements 18 pass through the first positioning hole 151 and the second positioning hole 173 to fix the mating component 15 and the sleeve 17 together, thereby facilitating the assembly of the base component 10. In this embodiment, the mating component 15 has two first positioning holes 151, two second positioning holes 173, and two positioning elements 18. The two first positioning holes 151 are symmetrically arranged with respect to the axis along the same diameter of the mating component 15. It is understood that the number of positioning elements 18 in this application is not limited.

[0041] The locking pin body 21 is fitted into the receiving groove 1131 with a clearance. The clearance between the inner wall of the receiving groove 1131 and the outer wall of the locking pin body 21 is preferably [0.03, 0.15] mm, more preferably [0.06, 0.10] mm, so that the locking pin body 21 can be easily inserted into and removed from the receiving groove 1131.

[0042] Please see Figure 12 , Figure 13 , Figure 14 , combined Figures 1 to 5 The locking pin body 21 includes a first mounting portion 214 and a second mounting portion 215. The first mounting portion 214 is located at the proximal end of the locking pin body 21. In this embodiment, the first mounting portion 214 is generally frustum-shaped to facilitate the detachment of the locking pin body 21 from the first base 11. A threaded hole 211 (e.g., Figure 13(As shown) is located near the end of the first mounting portion 214, enabling a detachable connection between the first mounting portion 214 and the push rod 31. The first mounting portion 214 is dimensionally reduced in all directions compared to the second mounting portion 215, with "all directions" including radial and axial directions.

[0043] The second mounting part 215 of the locking pin body 21 is fitted with the inner wall of the receiving groove 1131 with clearance (e.g.) Figure 2 (As shown). A mutually compatible anti-rotation structure is also provided between the first base 11 and the second mounting part 215. The anti-rotation structure is used to prevent the locking nail body 21 from rotating relative to the first base 11. Therefore, when the medical locking and cutting integrated device 100 performs the locking operation, the locking nail body 21 does not rotate, and the push rod 31 rotates and moves axially relative to the locking nail body 21.

[0044] In this embodiment, the anti-rotation structure between the first base 11 and the second mounting portion 215 consists of at least one pair of mating planes. Specifically, the first base 11 has two opposing planes on the inner wall of the receiving groove 1131. The second mounting portion 215 of the locking pin body 21 includes a first outer surface 2151 that is interconnected (e.g., ...). Figure 13 As shown), the second outer surface 2152 (as shown) Figure 13 As shown), the third outer surface 2153 (as shown) Figure 12 (as shown) and the fourth outer surface 2154 (as shown) Figure 12 (As shown). The first outer surface 2151 and the third outer surface 2153 are disposed opposite to each other, and the second outer surface 2152 and the fourth outer surface 2154 are disposed opposite to each other. The first outer surface 2151 and the third outer surface 2153 are arc surfaces, and the second outer surface 2152 and the fourth outer surface 2154 are flat surfaces. The second outer surface 2152 is in anti-rotational engagement with a flat surface in the receiving groove 1131 of the first base 11, and the fourth outer surface 2154 is in anti-rotational engagement with another flat surface in the receiving groove 1131 of the first base 11. In other words, the anti-rotational structure between the first base 11 and the second mounting part 215 consists of two pairs of mating flat surfaces. It can be understood that this application does not limit the first outer surface 2151 and the third outer surface 2153 to be arc surfaces, nor does it limit the second outer surface 2152 and the fourth outer surface 2154 to be flat surfaces; the anti-rotational engagement between the second mounting part 215 and the inner wall of the first base 11 is sufficient. It is understood that the anti-rotation structure 216 may also include, but is not limited to, structures such as protrusions and grooves that extend axially and are mutually adapted.

[0045] The locking pin body 21 has a receiving cavity 217 for accommodating the crimping member 23. The receiving cavity 217 extends from the first mounting portion 214 to the second mounting portion 215. The receiving cavity 217 passes through the second mounting portion 215 and extends away from the distal end of the first mounting portion 214, i.e., the distal opening of the locking pin body 21, to facilitate the assembly and disassembly of the crimping member 23 and the locking pin body 21. The inner wall of the receiving cavity 217 is provided with a crimping groove 2171. The crimping groove 2171 has a bottom wall 2173. When the push rod 31 moves forward, it drives the crimping member 23 to gradually approach the bottom wall 2173 until the gap between the crimping member 23 and the bottom wall 2173 is less than the diameter of the medical suture 200, so as to lock the medical suture 200 located between the crimping member 23 and the bottom wall 2173.

[0046] The locking pin body 21 also includes a guide portion 218 provided on the side wall of the receiving cavity 217. The wire clamping member 23 is movably connected to the guide portion 218 and is movable along the guide portion 218. The guide portion 218 is used to guide the movement of the wire clamping member 23 relative to the locking pin body 21. The guide portion 218 gradually approaches the bottom wall 2173 from its proximal end to its distal end. The guide portion 218 includes a first guide portion 2181 and a second guide portion 2183. The first guide portion 2181 is located at the proximal end of the guide portion 218 and is inclined relative to the axial direction of the locking pin body 21. The second guide portion 2183 extends along the axial direction of the locking pin body 21.

[0047] The locking pin body 21 also includes a wire outlet hole 219 communicating with the receiving cavity 217. The wire outlet hole 219 extends from the first outer surface 2151 of the second mounting part 215 to the first mounting part 214, and is used to lead the medical wire 200 out from the receiving cavity 217. The wire outlet hole 219 is inclined relative to the axial direction. The ratio between the length of the wire outlet hole 219 and the length of the locking pin body 21 is preferably in the range of [1 / 3, 1 / 2], and the ratio between the width of the wire outlet hole 219 and the maximum width of the locking pin body 21 is preferably in the range of [1 / 3, 1]. This arrangement of the wire outlet hole 219 minimizes the weight and volume of the locking pin body 21, and reduces the impact on human tissue after the locking pin member 20 locking the medical wire 200 is released.

[0048] The wire pressing member 23 is movably received in the receiving cavity 217 and movably connected to the guide portion 218. In this embodiment, the wire pressing member 23 includes a wire pressing portion 231 and a connecting portion 233 fixedly connected. The wire pressing portion 231 can be pressed against the bottom wall 2173 of the wire pressing groove 2171. The outer diameter of the wire pressing portion 231 is larger than the outer diameter of the connecting portion 233. The connecting portion 233 can roll within the guide portion 231, and the wire pressing portion 231 and the connecting portion 233 are coaxially arranged. Please refer to the following: Figure 15 and Figure 16Let the axial direction of the locking pin body 21 be the first direction, the extension direction of the central axis of the wire pressing member 23 be the second direction, and the direction perpendicular to both the first and second directions be the third direction. Let the width of the wire pressing part 231 in the second direction be W1, the width of the wire pressing groove 2171 in the second direction be W2, the diameter of the wire pressing part 231 be D1, the height of the distal end of the guide part 218 along the third direction be H2, the maximum distance between the distal end of the guide part 218 and the bottom wall 2173 of the distal end of the wire pressing groove 2171 be H1, and the diameter of the medical suture 200 be D2. The following settings are required:

[0049] W2>W1, and

[0050] 0≤H1-H2 / 2-D1 / 2≤D2.

[0051] The wire clamping member 23 also includes a limiting part 235 fixed to the connecting part 233 to prevent the connecting part 233 from disengaging from the guide part 218. In this embodiment, the guide part 218 is a guide groove penetrating the locking pin body 21, the connecting part 233 passes through the guide groove, the limiting part 235 is located outside the locking pin body 21, and the diameter of the limiting part 235 is greater than the opening height of the guide groove. In this embodiment, the guide part 218 is formed on the second outer surface 2152 and the fourth outer surface 2154. In other embodiments, the guide part 218 can be a guide rail provided on the inner wall of the receiving cavity 217, the connecting part 233 can be received in the receiving cavity 217 and can roll along the guide rail, and the limiting part 235 can be omitted.

[0052] The locking pin component 20 also includes an end cap 25, which is fixedly disposed at the distal end of the second mounting portion 215 to close the distal end of the locking pin body 21. The end cap 25 also limits the movement of the wire clamping member 23 on the guide portion 218 to prevent the wire clamping member 23 from detaching from the locking pin body 21. The locking pin body 21 and the end cap 25 are separately disposed to facilitate the assembly and disassembly of the wire clamping member 23. The end cap 25 is provided with a wire inlet hole 251 for inserting a medical suture 200 into the receiving cavity 217. Let the axial length of the locking pin body 21 be L1, the length of the distal end of the support member 13 inserted into the proximal end of the first base 11 be L2, the axial length of the first base 11 be L, and the length of the end cap 25 along the axial direction of the locking pin body 21 be L3, then the following condition is satisfied: L = L1 + L2 + L3.

[0053] Since the locking component 20 (including the locking body 21, the pressure wire 23 and the end cap 25) is ultimately implanted into the human body, the material of the locking component 20 includes, but is not limited to, biocompatible materials such as stainless steel, pure titanium, nickel titanium, and cobalt chromium alloy, with pure titanium and stainless steel being preferred.

[0054] Please see Figures 2 to 7 , combined Figures 18 to 20The push rod 31 of the locking member 30 is movably inserted into the insertion channel 131. When the push rod 31 rotates, causing it to move synchronously axially towards the distal end (i.e., forward direction), it pushes the suture clamping member 23 to move along the guide portion 218 from the proximal end to the distal end (i.e., forward movement), gradually pressing the medical suture 200 into the suture clamping portion 231 and the suture clamping groove 2171 of the suture clamping member 23. Then, the suture cutting member 50 moves axially towards the proximal end, cutting off the excess medical suture 200 on the mating member 15. During the suture cutting process, due to the push rod 31... The self-locking effect of the external thread and the threaded hole 211 of the locking pin body 21, and the continuous pushing of the distal end of the push rod 31 against the suture pressing member 23, prevents the suture pressing member 23 from moving towards the proximal end, so that the suture pressing part 231 of the suture pressing member 23 and the bottom wall 2173 of the suture pressing groove 2171 always maintain a minimum gap to press the medical suture 200 tightly. Even if the medical suture 200 is pulled towards the proximal end or subjected to other external forces during the operation, it can prevent the medical suture 200 from loosening and ensure reliable locking.

[0055] The locking wire component 30 also includes a locking wire core 33 fixedly connected to the proximal end of the push rod 31. The locking wire core 33 is used to drive the push rod 31 to rotate and move axially. The locking wire core 33 is a flexible body with anti-torsional support force, preferably a laser-cut tube, spring, stainless steel wire, or multi-layer solid mandrel. In this embodiment, stainless steel wire is used for the locking wire core 33. By driving the locking wire core 33 to rotate, the push rod 31 can be driven to rotate and move. When the locking wire core 33 is rotated in a preset direction, the locking wire core 33 drives the push rod 31 to move forward towards the distal end, and the push rod 31 can drive the wire pressing component 23 to move relative to the locking pin body 21. After the wire is cut, the locking wire core 33 is rotated in the opposite direction, and the locking wire core 33 drives the push rod 31 to move backward towards the proximal end, and the distal end of the push rod 31 separates from the locking pin body 21.

[0056] Please refer to it again. Figures 2 to 5 , combined Figure 17 and Figure 20 The tangent component 50 includes a tool holder 51, a blade 53, and a drive component 55. The tool holder 51 is used to support the blade 53, and the drive component 55 is used to drive the blade 53 to move.

[0057] The tool holder 51 is located between the first base 11 and the mating member 15. The tool holder 51 is slidably sleeved on the support member 13, allowing it to move along the support member 13. The tool holder 51 has a mounting groove 511 for mounting the cutting blade 53. The tool holder 51 also includes a third mounting portion 512 and a fourth mounting portion 514. The fourth mounting portion 514 protrudes axially from the distal end face of the third mounting portion 512. The proximal end of the third mounting portion 512 has a through hole 5120 for through which the support member 13 passes. The third mounting portion 512 is anti-rotatingly connected to the support member 13. Preferably, please refer to... Figure 17 and Figure 8The support member 13 includes two opposing planes 135 and two opposing arc surfaces 137. The outline of the through hole 5120 is adapted to the shape of the support member 13. The cooperation of the planes prevents the tool holder 51 from rotating relative to the support member 13.

[0058] The fourth mounting portion 514 is mounted on the step 1113 and can slide along the axial direction of the first base 11. The step 1113 provides support for the blade holder 51 and also guides the axial movement of the blade holder 51, which helps to improve the stability of the movement of the blade holder 51. In addition, the shapes of the step 1113 and the fourth mounting portion 514 are complementary and compatible, and the two share radial and axial space, thereby reducing the radial dimension and axial length of the distal end of the medical locking and cutting integrated device 100, which helps to reduce the volume and weight of the medical locking and cutting integrated device 100.

[0059] The blade 53 is fixedly housed within the mounting slot 511. After assembly, a gap 530 exists between the blade 53 and the support member 13 (e.g., ...). Figure 2 As shown), for the medical suture 200 (such as) of the self-locking staple body 21. Figure 1 , Figure 4 and Figure 5 (As shown) It protrudes and is located below blade 53. Blade 53 has a cutting edge 531. See also Figure 4 The mating component 15 also has a tangent surface 153 positioned opposite the cutting edge 531. The cutting edge 531 and the tangent surface 153 cooperate to cut the medical suture 200 extending from the suture hole 219 of the self-locking staple body 21. During the cutting process of the tangent component 50, the tangent surface 153 provides abutment for the medical suture 200, facilitating the cutting edge 531 to cut the medical suture 200. In this embodiment, the tangent surface 153 is planar. It can be understood that the tangent surface 153 can also be curved.

[0060] The driving component 55 is fixedly connected to the blade holder 51, driving the blade holder 51 to move along the support member 13 toward the mating member 15, so that the blade 53 cooperates with the mating member 15 to cut the medical suture 200 extending from the suture outlet hole 219 of the self-locking nail body 21. The driving component 55 includes a connecting rod 551, a guide member 553, and a suture cutting core 555. The connecting rod 551 is fixedly connected between the guide member 553 and the third mounting portion 512 of the blade holder 51. The suture cutting core 555 is fixedly connected to the guide member 553 and is used to drive the connecting rod 551, the guide member 553, and the blade holder 51 to move axially.

[0061] More specifically, the proximal end of the third mounting portion 512 of the tool holder 51 is provided with a connecting hole 5121. The connecting rod 551 is fixedly connected to the connecting hole 5121, thereby achieving a fixed connection between the connecting rod 551 and the tool holder 51. The mating part 15 is also provided with a guide hole 155, through which the connecting rod 551 passes (e.g., ...). Figure 8(As shown). In this embodiment, the guide hole 155 is generally semi-waist-shaped and passes through the peripheral wall of the mating member 15. The inner wall of the guide hole 155 guides the movement of the connecting rod 551 relative to the support member 13. The connecting rod 551 is a rigid body with a certain length, preferably a rigid body such as a stainless steel tube or stainless steel rod; in this embodiment, a stainless steel rod is used. In this embodiment, there are two connecting rods 551, and the support member 13 is located between the two connecting rods 551. The two connecting rods 551 are symmetrically arranged about the central axis of the support member 13, which improves the stability of the movement of the tool holder 51 relative to the support member 13. It is understood that this application does not limit the number of connecting rods 551.

[0062] The guide member 553 is slidably sleeved on the support member 13, and is fixedly connected to the proximal end of the connecting rod 551. The guide member 553 is used to guide the movement of the tool holder 51. The guide member 553 is located between the mating member 15 and the second base 16. Please refer to the following: Figure 2 In this way, the portion of the support member 13 located between the first base 11 and the mating member 15 serves as a guide rail for the axial movement of the tool holder 51, and the portion of the support member 13 located between the mating member 15 and the second base 16 serves as a guide rail for the axial movement of the guide member 553. The guide member 553 also has a through hole 5531 adapted to the shape of the support member 13 to ensure anti-rotation and guiding functions. The shape of the guide member 553 includes, but is not limited to, circles, ellipses, etc.

[0063] The tangent core 555 is fixedly connected to the proximal end of the guide 553. The mating component 15 is located between the tool holder 51 and the guide 553. The tangent core 555 is a flexible body with torsional support, preferably a laser cutting tube, spring, stainless steel wire, or multi-layer solid mandrel; in this embodiment, stainless steel wire is used. The tangent core 555 applies axial driving force to the guide 553, which drives the connecting rod 551 to move axially, thereby driving the tool holder 51 and the blade 53 to move.

[0064] The locking and cutting integrated device 100 provided in this application connects the locking pin component 20, the locking suture component 30, and the cutting suture component 50 together through the base component 10, thereby integrating the locking and cutting suture functions into one unit. The locking and cutting suture operations can be completed in one intervention, which can reduce the number of times the instrument is inserted into the body during surgery, simplify the surgical procedure, and save surgical time. During the cutting suture operation, the distal end of the push rod 31 in the locking pin component 30 and the self-locking structure 210 on the locking pin body 21 of the locking pin component 20 can maintain the position of the locking pin component 20 locking the medical suture 200, ensuring that the medical suture 200 is always locked. In this way, the medical suture 200 is prevented from coming loose from the locking pin component 20, preventing the locking pin component 20 from falling off and eliminating the risk to the human body caused by the falling locking pin component 20.

[0065] The mitral valve is a one-way valve between the left atrium (LA) and the left ventricle (LV), ensuring blood flows from the left atrium to the left ventricle. A normal, healthy mitral valve has multiple chordae tendineae. The mitral valve leaflets are divided into anterior and posterior leaflets. When the left ventricle is in diastole, both leaflets are open, allowing blood to flow from the left atrium to the left ventricle. When the left ventricle is in systole, the chordae tendineae are stretched, preventing the leaflets from being pushed into the atrium by the blood flow. The anterior and posterior leaflets close properly, ensuring blood flows from the left ventricle through the aortic valve (AV) to the aorta. If the chordae tendineae rupture, when the left ventricle is in systole, the mitral valve cannot return to a fully closed state as it normally would, resulting in incomplete closure. The force of the blood flow can further cause the leaflets to dislodge into the left atrium, causing blood regurgitation.

[0066] The following example of mitral valve chordae tendineae repair surgery, using medical sutures as the repair sutures for artificial chordae tendineae, illustrates the use of the medical locking and cutting integrated device 100 provided in this embodiment in chordae tendineae repair surgery.

[0067] Step 1: First, implant one or more medical sutures (200mm each) into the anterior or posterior leaflet of the mitral valve.

[0068] Step 2: Insert the medical suture 200 on the valve leaflet into the anchoring element of the anchoring device outside the patient's body, and send the anchoring element into the left ventricle and anchor the anchoring element to the anterior papillary muscle, posterior papillary muscle or ventricular wall.

[0069] Step 3: Externally, thread all the medical sutures 200 from the valve leaflets into the locking pin component 20 of the medical locking and cutting integrated device 100, and then pass the medical sutures 200 through the outlet hole 219 on the locking pin body 21 and the through hole 171 on the sleeve 17. Figure 1 As shown.

[0070] Step 4: Following the guidance of the medical line 200, push the distal end of the medical locking and cutting integrated device 100 into the left atrium of the heart through the femoral vein and interatrial septum, and move it closer to the anterior or posterior papillary muscle of the left ventricle. At the same time, pull the medical line 200 until the distal end of the medical locking and cutting integrated device 100 reaches the predetermined position in the left ventricle.

[0071] Step 5: Adjust the tightness of each medical suture 200 individually, while simultaneously using ultrasound to determine the state of least mitral regurgitation. Once this state is reached, stop adjusting and maintain the tightness of each medical suture 200. Please refer to [link / reference]. Figure 18 At this time, the wire clamping member 23 is located at the proximal end of the locking pin body 21. Rotating the locking pin component 30 drives the push rod 31 to move axially towards the distal end against the wire clamping member 23, continuously pressing the medical suture 200 into the wire clamping groove 2171 of the locking pin body 21 (e.g., ...). Figure 14(As shown). When the wire clamping member 23 moves to the limit position of the end cap 25, the medical thread 200 is pressed tightly against the locking pin body 21 by the wire clamping member 23, as shown. Figure 19 As shown.

[0072] Step 6: After compressing the medical suture 200, apply axial tension to the suture core 555. Guided by the support 13, the suture component 50 moves from the distal end to the proximal end, cutting off the excess medical suture 200 on the tangential surface 153 of the mating component 15. Figure 20 As shown. Specifically, during the suture cutting process, the cutting edge 531 of the blade 53 presses against the tangent surface 153, which provides a support for the medical suture 200 and a point of force for the cutting edge 531 of the blade 53, making it easy to cut the medical suture 200. At the same time, since the cutting edge 531 of the blade 53 and the tangent surface 153 are in a mutually pressing relationship, there is no interlacing relationship like that of scissors, and therefore there is no abnormal situation of suture extrusion between the blade 53 and the tangent surface 153. This ensures that the entire medical locking and cutting integrated device 100 can be smoothly withdrawn afterward, avoiding the risk of organ tissue being pulled due to suture extrusion. During the suture cutting process of the suture cutting component 50, the self-locking structure 210 keeps the suture pressing component 23 in the position that locks the medical suture 200, without loosening.

[0073] After the tangent is completed, the locking wire component 30 (push rod 31 and locking wire core 33) is rotated, driving the locking wire component 30 to move axially towards the proximal end. The distal end of the push rod 31 separates from the locking pin body 21 of the locking pin component 20. Since the proximal end of the locking pin body 21 has a frustum-shaped structure, under the force of the heartbeat, the locking pin component 20 is easily released from the first base 11, such as... Figure 21 As shown.

[0074] Step 7: Remove the base component 10, locking component 30, cutting component 50, and excess medical suture 200 of the medical locking and cutting integrated device 100 from the patient's body, leaving the locking component 20 inside the patient's body. At this time, the locking component 20 will hold the medical suture 200 (such as...) Figure 22 (As shown) It is fixed to the anterior or posterior papillary muscle or the ventricular wall, and the chordae tendineae complete the reconstruction.

[0075] It is understandable that the medical suture 200 can also be a suture, a repair suture for edge-to-edge repair of valves, etc. The medical locking and cutting integrated device 100 provided in this application can also be used for tissue suturing, edge-to-edge repair of valves, etc., to lock and cut the medical suture 200.

[0076] The above are some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A medical locking and cutting integrated device, characterized in that, include: The base component includes a first base, a support member, and a mating member, wherein the distal end of the support member is fixedly connected to the first base, and the mating member is disposed on the support member; A locking pin component includes a locking pin body and a pressure wire member movably connected to the locking pin body, wherein the locking pin body is detachably disposed within the first base. A suture locking component includes a push rod; the distal end of the push rod is detachably connected to the locking pin body, and the distal end of the push rod and the locking pin body have a mutually cooperating self-locking structure; the push rod moves forward to drive the suture pressing member to move relative to the locking pin body to lock the medical suture located between the suture pressing member and the locking pin body; The self-locking structure is used to prevent the push rod from moving in the opposite direction under the action of the medical line; as well as A tangential member is slidably connected to the support member, and the tangential member is used to cooperate with the mating member to cut the medical suture extending from the locking pin body.

2. The medical locking and cutting integrated device as described in claim 1, characterized in that, The tangential component includes a blade holder, a blade, and a driving member; the blade holder is slidably sleeved on the support member between the first base and the mating member; the blade is fixedly mounted on the blade holder; the driving member is fixedly connected to the blade holder to drive the blade holder to move along the support member toward the mating member, so that the blade and the mating member cooperate to cut the medical suture extending from the locking pin body.

3. The medical locking and cutting integrated device as described in claim 2, characterized in that, The blade holder is provided with a mounting groove, the blade is fixedly housed in the mounting groove, and there is a gap between the blade and the support member. The blade has a cutting edge, and the mating member has a tangential surface arranged opposite to the cutting edge. The cutting edge and the tangential surface cooperate to cut the medical suture extending from the locking nail body.

4. The medical locking and cutting integrated device as described in claim 2, characterized in that, The first base includes a first mounting portion and a second mounting portion fixedly connected; the first mounting portion is located at the proximal end of the first base, and the proximal end of the first mounting portion has a step; the tool holder includes a third mounting portion and a fourth mounting portion, the fourth mounting portion protruding axially from the distal end surface of the third mounting portion, the fourth mounting portion covering the step and being able to slide axially along the first base.

5. The medical locking and cutting integrated device as described in claim 4, characterized in that, The blade holder is provided with a mounting groove, which extends from the near end face of the third mounting part to the fourth mounting part; the blade is fixedly housed in the mounting groove, and there is a gap between the blade and the support member.

6. The medical locking and cutting integrated device as described in claim 4, characterized in that, The second mounting part is provided with an axially penetrating receiving groove, and the main body of the locking pin is fitted into the receiving groove with clearance; the first mounting part is provided with an axially penetrating through groove, and the distal end of the support member is fixedly connected to the through groove; the support member is provided with an axially penetrating through channel that communicates with the receiving groove, and the push rod is movably inserted into the through channel.

7. The medical locking and cutting integrated device as described in claim 2, characterized in that, The driving component includes a connecting rod, a guide, and a tangent core. The connecting rod is fixedly connected to the proximal end of the tool holder. The mating component has a guide hole through which the connecting rod passes. The guide is slidably sleeved on the support and is fixedly connected to the proximal end of the connecting rod. The tangent core is fixedly connected to the proximal end of the guide. The mating component is located between the tool holder and the guide.

8. The medical locking and cutting integrated device as described in claim 2, characterized in that, The base component further includes a second base and a sleeve. The second base is fixed to the proximal end of the support member, and the mating member is located between the blade holder and the second base. The sleeve is sleeved on the first base, the blade holder, the mating member and the second base, and the two ends of the sleeve are respectively fixedly connected to the first base and the second base. The sleeve is provided with a wire hole for leading out a medical suture extending from the locking nail body.

9. The medical locking and cutting integrated device as described in claim 1, characterized in that, The locking wire component also includes a locking wire inner core, which is a flexible body and is fixedly connected to the proximal end of the push rod.

10. The medical locking and cutting integrated device as described in claim 1, characterized in that, The self-locking structure includes an external thread at the distal end of the push rod and a threaded hole at the proximal end of the locking pin body that is adapted to the external thread. The support member has an axially penetrating channel that connects to the threaded hole, and the push rod is movably inserted through the channel.

11. The medical locking and cutting integrated device as described in any one of claims 1-10, characterized in that, The locking pin body has a receiving cavity, and the pressure wire member is movably received in the receiving cavity; the locking pin body includes a first mounting portion and a second mounting portion, the first mounting portion being located at the proximal end of the locking pin body; the first mounting portion is dimensionally reduced in all directions compared to the second mounting portion.

12. The medical locking and cutting integrated device as described in claim 11, characterized in that, The first base is clearance-fitted with the second mounting part of the locking pin body, and the first base and the second mounting part are provided with mutually compatible anti-rotation structures.

13. The medical locking and cutting integrated device as described in claim 11, characterized in that, The locking pin body also includes a wire outlet hole communicating with the receiving cavity. The wire outlet hole extends from the second mounting part to the first mounting part and is used to lead the medical wire out from the receiving cavity.

14. The medical locking and cutting integrated device as described in claim 13, characterized in that, The ratio between the length of the wire outlet hole and the length of the lock pin body is in the range of [1 / 3, 1 / 2]; the ratio between the width of the wire outlet hole and the maximum width of the lock pin body is in the range of [1 / 3, 1].

15. The medical locking and cutting integrated device as described in claim 11, characterized in that, The inner wall of the receiving cavity is provided with a wire pressing groove, and the wire pressing groove has a bottom wall; when the push rod moves forward, it drives the wire pressing member to gradually approach the bottom wall until the gap between the wire pressing member and the bottom wall is smaller than the diameter of the medical wire, so as to lock the medical wire located between the wire pressing member and the bottom wall.

16. The medical locking and cutting integrated device as described in claim 15, characterized in that, The locking pin body also includes a guide portion provided on the side wall of the receiving cavity. The pressing member is movably connected to the guide portion and moves along the guide portion. The guide portion gradually approaches the bottom wall from its proximal end to its distal end.

17. The medical locking and cutting integrated device as described in claim 11, characterized in that, The locking pin component also includes an end cap, which is fixedly disposed at the distal end of the locking pin body. The end cap has a wire inlet hole for inserting the medical wire into the receiving cavity.

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