Suture locking and cutting device and suture locking and cutting system

Abstract

The present invention provides a suture locking and cutting device, comprising: an implant, including a winding assembly and a tangent assembly, the winding assembly having a first through hole for inserting the suture, the tangent assembly including a blade, the blade facing the suture passing through the first through hole; and a conveying assembly, including a tangent drive shaft and a winding drive member movably inserted in the tangent drive shaft, the distal end of the winding drive member being detachably connected to the winding assembly to drive the winding assembly to rotate so that the suture is wound around the outer peripheral surface of the winding assembly; the distal end of the tangent drive shaft being detachably connected to the tangent assembly to drive the blade to move toward the suture and cut the suture. The suture locking and cutting device and suture locking and cutting system provided by the present invention have a strong locking force for the suture, less damage to the suture, and a lower risk of suture breakage.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and relates to valve interventional treatment devices, and in particular to a suture locking and cutting device and a suture locking and cutting system. Background Art

[0002] Mitral regurgitation is one of the most common valvular diseases today. Surgical mitral valvuloplasty and artificial valve replacement are the most effective methods for treating mitral regurgitation. However, since surgical operations require extracorporeal circulation technical support, they are more traumatic, have more complications and a higher mortality rate.

[0003] Percutaneous mitral valve interventional repair technology is a relatively safe mitral valve repair method, among which transcatheter annuloplasty is the most representative. In the prior art, multiple anchors with sutures are anchored on the heart valve annulus along the circumference of the annulus, and then the sutures are tightened to shrink the mitral valve annulus, and then the tightened sutures are locked by an interventional locking device, and then the excess sutures are cut off by a tangent device.

[0004] The prior art discloses an interventional knot locking device, which first passes a thread through a titanium nail, then relies on external force to compress the titanium nail to deform it, and relies on the friction generated between the indentation of the titanium nail and the suture to fix the suture. Since the contact area between the indentation and the suture is small, the friction is small and the locking force is weak; and after implantation, under the continuous beating of the heart, the repeated friction between the indentation and the suture may cause damage to the suture, and the risk of suture breakage is high. Summary of the invention

[0005] The present invention provides a suture locking and cutting device and a suture locking and cutting system which have strong locking force for sutures, little damage to sutures and low risk of suture breakage.

[0006] In a first aspect, the present invention provides a suture locking and cutting device, comprising:

[0007] An implant, comprising a wire winding assembly and a wire cutting assembly, wherein the wire winding assembly has a first through hole for inserting the suture, and the wire cutting assembly comprises a blade, and the blade faces the suture passing through the first through hole; and

[0008] The conveying assembly includes a tangent drive shaft and a winding drive member movably installed in the tangent drive shaft, the distal end of the winding drive member is detachably connected to the winding assembly to drive the winding assembly to rotate so that the suture is wound around the outer circumferential surface of the winding assembly; the distal end of the tangent drive shaft is detachably connected to the tangent assembly to drive the blade to move toward the suture and cut the suture.

[0009] On the other hand, the present application provides a suture locking and cutting system, including a guide device and the suture locking and cutting device, the guide device including a sheath and a bending adjustment handle connected to the proximal end of the sheath, the winding drive member and the tangent drive shaft are installed in the guide device, the control handle is located outside the proximal end of the bending adjustment handle, and the distal end of the conveying assembly is located outside the distal end of the sheath and abuts against the sheath.

[0010] The suture locking and cutting device and suture locking and cutting system provided by the present invention drive the winding assembly to rotate to wind and lock the suture, thereby realizing the first friction locking of the suture; in the process of driving the tangent assembly to gradually approach the suture, the suture can be pressed by friction for a second time, and the double friction can increase the locking force of the suture, and the suture can be cut synchronously during the second suture pressing process. Therefore, the suture locking and cutting device provided by the present invention avoids long-term friction of the suture at the deformed lock mark, thereby reducing damage to the suture; the suture is locked by two different friction forces, and the locking force is higher; at the same time, the two processes of locking the suture and cutting the suture can be realized simultaneously through one device and one step, without the need to use the locking device and the tangent device separately, which greatly improves the functional diversity and structural compactness of the device, shortens the operation time, and reduces the risk of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of a suture locking and cutting system provided by an embodiment of the present invention;

[0013] Figure 2 yes Figure 1 A schematic diagram of the structure of the suture locking and cutting device provided;

[0014] Figure 3 yes Figure 1 A schematic diagram of the structure of the implant and sutures left in the heart is provided;

[0015] Figure 4 yes Figure 1 A schematic diagram of the structure of the guiding device provided;

[0016] Figure 5 yes Figure 2 A schematic diagram of the structure of the conveying assembly provided;

[0017] Figure 6 yes Figure 5A partial axial cross-sectional view of the conveying assembly is provided;

[0018] Figure 7a yes Figure 5 A schematic structural diagram of a rotating connecting member from a first perspective is provided;

[0019] Figure 7b yes Figure 5 A schematic structural diagram of a second viewing angle of a rotating connecting member provided;

[0020] Figure 7c yes Figure 5 A schematic structural diagram of a rotating connecting member from a third perspective is provided;

[0021] Figure 8a yes Figure 2 A partial cross-sectional view of a suture locking and cutting device is provided;

[0022] Figure 8b yes Figure 8a A cross-sectional view of the implant before suture insertion is provided;

[0023] Figure 9a yes Figure 5 A schematic diagram of the structure of the provided clamping claw from a first-person perspective;

[0024] Figure 9b yes Figure 9a A cross-sectional view of the jaws along the axial direction is provided;

[0025] Fig.9c yes Figure 5 A schematic diagram of the structure of the provided clamping claw from a second perspective;

[0026] Fig.10 yes Figure 2 A schematic diagram of the structure of the provided suture locking and cutting device;

[0027] Fig.11 yes Figure 2 A schematic diagram of the structure of the provided suture locking and cutting device with the outer shell part cut off;

[0028] Fig.12 yes Figure 2 A schematic diagram of the structure of the provided suture locking and cutting device with the outer shell removed;

[0029] Fig.13a yes Fig.10 A schematic diagram of the structure of the shell from a first perspective is provided;

[0030] Fig.13b yes Fig.10 A schematic diagram of the structure of the shell from a second perspective is provided;

[0031] Fig.13c yes Fig.10 A schematic diagram of the structure of the shell from a third perspective is provided;

[0032] Fig.13d yes Fig.10 A schematic diagram of the structure of the shell from a fourth perspective is provided;

[0033] Fig.13e yes Fig.10 A cross-sectional view of the housing is provided;

[0034] Fig.13f yes Fig.10 Another cross-sectional view of the housing is provided;

[0035] Fig.14a yes Fig.10 A schematic diagram of the structure of a first limiting component is provided;

[0036] Fig.14b yes Fig.14a A structural disassembly diagram of the first limit assembly provided;

[0037] Fig.14c yes Fig.14a A schematic diagram of the structure of the first support provided;

[0038] Fig.15 yes Fig.10 A schematic diagram of the structure of the rotating assembly provided;

[0039] Fig.16a yes Fig.10 A schematic diagram of the structure of a rotating wheel from a first perspective is provided;

[0040] Fig.16b yes Fig.16a A cross-sectional view of the rotating wheel is provided;

[0041] Fig.16c yes Fig.10 A schematic structural diagram of a rotating wheel from a second perspective is provided;

[0042] Fig.17a yes Fig.10 A schematic structural diagram of a first-view perspective of a rotating assembly is provided;

[0043] Fig.17b yes Fig.17a A cross-sectional view of the rotating assembly is provided;

[0044] Fig.17c yes Fig.10 A schematic structural diagram of a second viewing angle of a rotating assembly is provided;

[0045] Fig.18a yes Fig.10 A schematic diagram of the structure of the first-person perspective of the tangent component provided;

[0046] Fig.18b yes Fig.10 A schematic diagram of the structure of the second perspective of the tangent component provided;

[0047] Fig.19a yes Fig.10 A schematic diagram of the structure of the mobile component provided from the first perspective;

[0048] Fig.19b yes Fig.10 A schematic diagram of the structure of the second perspective of the mobile component provided;

[0049] Fig.19c yes Fig.19b A cross-sectional view of the mobile assembly is provided;

[0050] Fig.19d yes Fig.10 A schematic diagram of the structure of the mobile component provided from a third perspective;

[0051] Fig.20a yes Fig.10 A schematic diagram of the structure of the winding assembly provided;

[0052] Fig.20b yes Fig.10 A schematic diagram of the structure of the winding assembly provided;

[0053] Fig.20c yes Fig.20b A schematic diagram of the structure of a second ratchet is provided;

[0054] Fig.20d yes Fig.20b A schematic diagram of the structure of the winding shaft from a first perspective is provided;

[0055] Fig.20e yes Fig.20b A schematic structural diagram of a second perspective of a provided winding shaft;

[0056] Fig.20f yes Fig.20e A cross-sectional view of the provided winding spool;

[0057] Fig.21 yes Fig.10 A schematic diagram of the structure of the second limit assembly provided;

[0058] Fig.22a yes Fig.10 A schematic diagram of the structure of the base provided;

[0059] Figure 22b yes Fig.10 A schematic diagram of the structure of the base and the second limit assembly provided at a first viewing angle;

[0060] Fig.22c yes Fig.10 A schematic diagram of the structure of the base and the second limiting assembly provided at a second viewing angle;

[0061] Fig.23a yes Figure 2 An axial cross-sectional view of the implant is provided before the suture is inserted and the wire is wound;

[0062] Figure 23b yes Figure 2 A radial cross-sectional view of the implant is provided before the suture is inserted and the wire is wound;

[0063] Fig.24a yes Figure 2 A schematic diagram of the structure of the provided implant after winding and after the outer shell is removed;

[0064] Figure 24b yes Figure 2 A cross-sectional view of the implant along the axial direction after winding is provided;

[0065] Fig.24c yes Figure 2 A cross-sectional view of the implant in the radial direction after winding is provided;

[0066] Fig.25 yes Figure 2 A cross-sectional view of the implant along the axial direction at the tangent line is provided;

[0067] Fig.26 yes Figure 2 A cross-sectional view of the implant with sutures removed taken along the axial direction at the tangent line is provided;

[0068] Fig. 27 It is a schematic diagram of a structure in which multiple anchors connected by sutures are implanted on the mitral valve annulus;

[0069] Fig.28 It is a schematic diagram of the structure of the transcatheter lock-wire cutting device reaching the vicinity of the mitral valve and inserting the suture;

[0070] Fig.29 It is a schematic diagram of the structure of the suture with a gasket fixed on the mitral valve annulus;

[0071] Fig.30 is a schematic diagram of the structure of a suture with a spacer passing through an implant;

[0072] Fig.31 It is a schematic diagram of the structure in which the suture with the gasket is cut by the implant and the implant and the suture remain in the heart. DETAILED DESCRIPTION

[0073] The technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0074] In an interventional surgical instrument, the end of the interventional surgical instrument close to the operator is defined as the proximal end, and the end of the interventional surgical instrument away from the operator is defined as the distal end. In the accompanying drawings of the present invention, the side where N is located is marked as the proximal end, and the side where M is located is marked as the distal end. The direction from the distal end to the proximal end is the axial direction.

[0075] An embodiment of the present invention provides a suture locking and cutting system. The suture locking and cutting system provided by the present invention is suitable for interventional heart valve repair procedures. Specific interventional heart valve repair procedures include, but are not limited to, mitral valve annuloplasty. Specifically: a plurality of anchors connected by sutures are anchored on the mitral valve ring of the heart, the suture locking and cutting system is passed through the sutures and delivered to the vicinity of the mitral valve, the suture locking and cutting system is manipulated to tighten the sutures, thereby shrinking the mitral valve ring, and the excess sutures are cut off when the mitral valve ring is shrunk to an appropriate length; after cutting the sutures, the implant and the sutures remain in the heart to repair the mitral valve. The suture locking and cutting system provided by the present invention can also be used for other interventional mitral or tricuspid valve repairs.

[0076] The specific structure of the suture locking and cutting system provided in the present application is illustrated below with reference to the accompanying drawings.

[0077] See also Figure 1 The suture locking and cutting system 1000 provided in the embodiment of the present application at least includes a suture locking and cutting device 100 and a guiding device 300 .

[0078] See also Figure 2 The suture locking and cutting device 100 at least includes an implant 10, a delivery assembly 20, and a control handle 125 connected to the proximal end of the delivery assembly 20.

[0079] See also Figure 3 The implant 10 is used to be implanted near the mitral valve, and the suture 200 is locked and cut off under the action of the conveying component 20.

[0080] Please also read Figure 2 and Figure 3 The delivery assembly 20 is detachably connected to the implant 10. The delivery assembly 20 is used to deliver the implant 10 to the mitral valve ring 2000 along the suture 200, and control the implant 10 to lock the suture 200 and cut the suture 200. After the implant 10 cuts the suture 200, the delivery assembly 20 can be separated from the implant 10.

[0081] During the process of locking the suture 200, the implant 10 is movably mounted on the suture 200 to adjust the length of the suture 200 under the action of the delivery assembly 20. When the length of the suture 200 is adjusted to a suitable size, the implant 10 cuts off the excess suture 200 and locks the suture 200 to keep the mitral valve ring 2000 in a suitable shape, thereby allowing the heart mitral valve ring 2000 to maintain normal operation. The material of the suture 200 includes but is not limited to PTFE, e-PTFE or PET.

[0082] See also Figure 4 The guiding device 300 includes a sheath tube 113 and a bending handle 123 connected to the proximal end of the sheath tube 113. Figure 1 The suture locking and cutting device 100 is installed in the guiding device 300, and the guiding device 300 can guide the movement trajectory of the suture locking and cutting device 100, so as to deliver the implant 10 to the mitral valve ring 2000 of the patient's heart.

[0083] The specific structure of the guiding device 300 provided in the present application is described below with reference to the accompanying drawings.

[0084] Optional, see Figure 4 The sheath 113 can be a hollow sheath such as an adjustable bending sheath, a shaping sheath, etc., whose distal end can be bent or manipulated. In the present embodiment, the sheath 113 is an adjustable bending sheath. Specifically, the sheath 113 extends in a straight line when not subjected to a bending force, and is bent when subjected to a bending force. The sheath 113 is a multi-layer composite hollow tube. A traction ring (not shown) is embedded in the distal end of the sheath 113, and a traction wire (not shown) is provided in the wall of the sheath 113. The distal end of the traction wire is fixedly connected to the traction ring, and the proximal end of the traction wire extends toward the proximal end of the tube body of the sheath 113 and is connected to the bending knob 124.

[0085] The bending handle 123 can be connected to the proximal end of the sheath tube 113. The bending knob 124 is arranged on the surface, inside or outside of the bending handle 123. The operator controls the movement of the bending knob 124 to drive the traction wire to move along the axial direction of the sheath tube 113, thereby pulling the sheath tube 113 to bend or restore it to straightness.

[0086] The specific structure of the conveying assembly 20 provided in the present application is illustrated below with reference to the accompanying drawings.

[0087] See also Figure 5 The conveying assembly 20 includes a tangent drive shaft 102 , a winding drive member 105 and a claw 103 . The winding drive member 105 includes a winding drive shaft 101 and a rotating connection member 104 .

[0088] See also Figure 5The tangential drive shaft 102 and the winding drive shaft 101 are both hollow tubes, and the distal ends thereof have flexible sections of a certain length, so that they can bend and transmit torque.

[0089] See also Figure 5 and Figure 6 The winding drive shaft 101 is movably installed in the tangent drive shaft 102 and has a clearance fit with the tangent drive shaft 102 to ensure that there is no interference when the winding drive shaft 101 and the tangent drive shaft 102 rotate relative to each other. Figure 5 The proximal end of the winding drive shaft 101 extends out of the proximal end of the tangential drive shaft 102 and is connected to the control handle 125 so that the control handle 125 controls the movement of the winding drive shaft 101. Figure 6 The distal end of the winding drive shaft 101 extends out of the distal end of the tangential drive shaft 102 and is connected to the rotating connector 104. The rotating connector 104 docks with the implant 10.

[0090] See also Figures 7a to 7c The rotating connector 104 includes a first boss 118, a middle boss 121 and a second boss 119 which are interconnected as one body. The middle boss 121 is a cylindrical section. The second boss 119 is located at the proximal end of the middle boss 121, and the first boss 118 is located at the distal end of the middle boss 121. The first boss 118 is used to dock with the implant 10.

[0091] See also Figure 6 , the second boss 119 is clamped at the distal end of the winding drive shaft 101. Specifically, the second boss 119 is inserted into the shaft hole of the winding drive shaft 101 and connected to the distal end of the winding drive shaft 101 to limit the relative rotation between the winding drive shaft 101 and the rotating connecting member 104. In the present invention, the shaft hole of a component refers to a through hole located at the approximate center axis of the component and extending in the axial direction.

[0092] See also Figure 7a The second boss 119 can be a square block or a cylindrical block. The radial dimension of the second boss 119 in a certain direction is smaller than the outer diameter dimension of the middle boss 121 , and a first step surface 120 is formed between the second boss 119 and the middle boss 121 .

[0093] See also Figure 8a and Figure 8b The outer diameter of the middle protrusion 121 is larger than the inner diameter of the tangential drive shaft 102, so that the winding drive shaft 101 and the tangential drive shaft 102 abut against the first step surface 120 to limit the proximal movement of the winding drive shaft 101 relative to the tangential drive shaft 102. Since the distal end portion (first boss 118) of the rotating connector 104 is docked with the implant 10, the axial rotation of the winding drive shaft 101 can drive the rotating connector 104 to rotate, thereby driving the implant 10 to rotate.

[0094] Optionally, the winding drive shaft 101 and the rotating connecting member 104 are both made of SUS304, and the connection method between the winding drive shaft 101 and the rotating connecting member 104 is preferably laser welding.

[0095] See also Figure 5 and Figure 6 The tangential drive shaft 102 has a certain axial length and is inserted into the sheath tube 113. The proximal end of the tangential drive shaft 102 is connected to the distal end of the control handle 125 (such as Figure 3 As shown in FIG. 1 , the distal end of the tangential drive shaft 102 extends from the distal end of the sheath tube 113. The distal end of the tangential drive shaft 102 is provided with an external thread 107 for connecting the implant 10.

[0096] Optionally, the tangent drive shaft 102 and the winding drive shaft 101 are both stainless steel tubes. The tangent drive shaft 102 and the winding drive shaft 101 are both provided with a bending adjustment section at the distal end and a non-bending adjustment section at the proximal end. The bending adjustment section is cut along the circumferential direction to form a plurality of staggered notches, but each notch is not cut off, thereby ensuring that the rigidity of the tube body has a certain degree of flexibility. The non-bending adjustment section is a straight stainless steel tube. The bending adjustment sections of the tangent drive shaft 102 and the winding drive shaft 101 correspond to the adjustable bending parts on the sheath tube 113. In other words, when entering the bending adjustment section at the distal end of the sheath tube 113, the winding drive shaft 101 and the tangent drive shaft 102 located in the sheath tube 113 bend accordingly.

[0097] See also Figure 1 and Figure 5 The control handle 125 connects the proximal ends of the tangent drive shaft 102 and the winding drive shaft 101. The control handle 125 is located outside the proximal end of the bending adjustment handle 123.

[0098] The control handle 125 is provided with a winding drive switch 127, a tangent drive switch 128 and a travel switch 126. The winding drive switch 127 is connected to the proximal end of the winding drive member 105 and is used to control the rotation of the winding drive member 105. The tangent drive switch 128 is connected to the proximal end of the tangent drive shaft 102 and is used to control the rotation of the tangent drive shaft 102. The travel switch 126 is used to control the relative position between the tangent drive shaft 102 and the sheath tube 113.

[0099] Optional, see Figure 5 The travel switch 126 and the winding drive switch 127 are arranged on one side of the control handle 125 (for example Figure 5 The tangent drive switch 128 is provided on the other side of the control handle 125 (for example Figure 5The above arrangement can also make the axial size of the control handle 125 relatively small, so that all switches can be grasped by one hand, making the control convenient.

[0100] Optional, see Figures 9a to 9c , the claw 103 is a hollow structure. The claw 103 is located at the distal end of the sheath 113, so as to fix the suture locking and cutting device 100 and the guide device 300 together, and the connection method is preferably glue. The claw 103 is sleeved on the outer periphery of the tangent drive shaft 102 close to the distal end, that is, the proximal end of the claw 103 is arranged between the distal inner wall of the sheath 113 and the distal outer wall of the tangent drive shaft 102. The distal ends of the tangent drive shaft 102 and the winding drive shaft 101 both extend out of the distal end of the claw 103. The radial dimension of the proximal end of the claw 103 is smaller than the radial dimension of the distal end of the claw 103, that is, the claw 103 is in the shape of a cone, a trumpet, etc. Please refer to Figure 1 In order to facilitate delivery in the patient's body, the tube body of the delivery component 20 has a size limitation. The radial dimension of the tube body of the delivery component 20 is smaller than the outer diameter of the implant 10. Therefore, the diameter of the claw 103 gradually increases from the proximal end to the distal end until it is adapted to the outer diameter of the implant 10.

[0101] The distal end of the claw 103 is detachably connected to the implant 10. Specifically, Figure 9a As shown, the distal end of the clamping claw 103 is provided with at least one fourth boss 115 (the third boss will be described later) for docking the implant 10. In this embodiment, two fourth bosses 115 extending distally are symmetrically provided on the clamping claw 103. Optionally, the clamping claw 103 is made of metal material, and the material of the clamping claw 103 is preferably SUS304.

[0102] The specific structure of the implant 10 provided in the present application is described below with reference to the accompanying drawings.

[0103] See also Fig.10 The implant 10 includes a shell 4, a first limiting assembly 2, a rotating assembly 3, a cutting assembly 5, a moving assembly 6, a winding assembly 7, a second limiting assembly 8 and a bottom shell 9.

[0104] See also Fig.10 The shell 4 is a cylinder with two ends open. In other words, the shell 4 is hollow and cylindrical. The shell 4 has an inner cavity 401.

[0105] See also Figure 8a , Figure 8b , Fig.11 and Fig.12, the bottom shell 9 covers the opening at the distal end of the shell 4 and is fixedly connected to the distal end of the shell 4. The first limit assembly 2, the rotating assembly 3, the moving assembly 6, the winding assembly 7, and the second limit assembly 8 are all located in the shell 4 and are arranged in sequence from the proximal end to the distal end. The first limit assembly 2 is arranged at the proximal end of the shell 4 and is close to the claw 103. The rotating assembly 3 is connected to the distal end of the first limit assembly 2 and fixes the first limit assembly 2 in the shell 4. The tangent assembly 5 is connected to the outer circumferential surface of the rotating assembly 3. The moving assembly 6 is adapted to the rotating assembly 3 through teeth, and the winding assembly 7 is arranged at the distal end of the moving assembly 6. The second limit assembly 8 is connected to the distal end of the winding assembly 7. The second limit assembly 8 is fixedly connected to the bottom shell 9.

[0106] See also Fig.10 , Fig.13a and Fig.13b The proximal end of the housing 4 is provided with at least one second slot 408 (the first slot will be described later) corresponding to the fourth boss 115, for detachably connecting with the distal end of the claw 103. Optionally, the distal end of the housing 4 is symmetrically provided with two second slots 408 to ensure connection stability.

[0107] See also Fig.11 When the distal end surface 116 of the claw 103 is in contact with the proximal end surface 406 of the housing 4, each fourth boss 115 is engaged with the corresponding second slot 408 on the housing 4. In this way, the housing 4 can be driven to rotate around the axial direction when the claw 103 is rotated. When the relative position of the tangent drive shaft 102 is fixed, the travel switch 126 can be adjusted to keep the claw 103 connected to the sheath 113 and the housing 4 in a relatively static state.

[0108] See also Fig.10 , Fig.13a and Fig.13b The distal end of the housing 4 is provided with two symmetrical second guide grooves 404 (the first guide groove will be described later) extending in the axial direction, which are used to cooperate with the two symmetrical third bosses 601 of the moving assembly 6. The second guide grooves 404 connect the inner cavity 401 with the outside of the housing 4. The third bosses 601 are engaged in the second guide grooves 404, so that the moving assembly 6 and the housing 4 can only move relative to each other axially along the second guide grooves 404, so as to prevent the moving assembly 6 from rotating axially relative to the housing 4.

[0109] See also Fig.13a , Fig.13c , Fig.13d , Fig.13e and Fig.13f The side wall of the housing 4 is also provided with a first guide groove 402 extending in the axial direction, and the first guide groove 402 passes through the distal end and the proximal end of the housing 4. The cutting assembly 5 is accommodated in the housing 4, specifically, in the first guide groove 402.

[0110] See also Fig.13a , Fig.13c , Fig.13d , Fig.13e and Fig.13f The side wall of the housing 4 is also provided with two symmetrical second through holes 410, 411 (the first through hole will be described later). One of the second through holes 411 is used for the suture 200 to pass through the implant 10. The other second through hole 410 is radially connected to the first guide groove 402, and is used for the suture 200 to pass through the implant 10.

[0111] It can be understood that before the suture 200 penetrates the implant 10, the two second through holes 410, 411 are connected to the first through hole 712 of the winding assembly 7, so that the suture 200 can radially cross the shell 4 through the second through hole 410, the inner cavity 401 and the second through hole 411 in sequence.

[0112] See also Figure 8a and Figure 8b The first limiting assembly 2 is fixed to the inner wall of the housing 4 near the proximal end surface of the housing 4. Preferably, the fixed connection is made by laser welding.

[0113] See also Figures 14a to 14c The first limiting assembly 2 includes a first base 205, a first stop claw 201 and a second elastic member 203 disposed on the first base 205. The first stop claw 201 is rotatably connected to the first base 205. The other end of the first stop claw 201 abuts against one end of the second elastic member 203. The second elastic member 203 is connected to the first base 205 through a first support 204.

[0114] See also Fig.14b The first stop claw 201 has a first through hole 206 extending in the axial direction. The first base 205 is provided with a central shaft hole 225, a second through hole 212 and a third through hole 211 arranged outside the central shaft hole 225. The central shaft hole 225 of the first base 205 is used to pass the rotating component 3. The third through hole 211 cooperates with the first support 204, and the second through hole 212 cooperates with the first pin 202.

[0115] See also Fig.14a The first stop claw 201 is swingably connected to the first base 205 through the first pin shaft 202. Specifically, one end of the first pin shaft 202 is clearance-matched with the first through hole 206 of the first stop claw 201, and the other end of the first pin shaft 202 is clearance-matched with the second through hole 212 of the first base 205.

[0116] See also Fig.14aThe other end of the first stopping claw 201 is provided with a first inclined surface 210 , and the first inclined surface 210 abuts against the rotating component 3 to limit the rotation direction of the rotating component 3 .

[0117] See also Fig.14b and Fig.14c , the second elastic member 203 is connected to the first base 205 through the first support 204, that is, the first support 204 is fixedly connected to the first base 205, and is fixedly connected to the other end of the second elastic member 203. One end of the first support 204 is a cylinder 219, which is fixed in the third through hole 211, and the other end is fixedly connected to the second elastic member 203. The specific shape is not limited, as long as it can accommodate the second elastic member 203.

[0118] Optionally, the first base 205, the second elastic member 203, the first support 204, and the first pin 202 are made of weldable biocompatible metal, preferably SUS304. Optionally, the second elastic member 203 is a thin sheet made of stainless steel.

[0119] See also Fig.15 The rotating assembly 3 includes a first ratchet wheel 302 , a rotating wheel 301 and a limiting ring 316 .

[0120] See also Figures 16a to 16c The rotating wheel 301 includes a first connecting column 309 at the proximal end and a rotating column 310 at the distal end. The first connecting column 309 and the rotating column 310 are both hollow structures. The shaft hole of the first connecting column 309 is connected to the shaft hole of the rotating column 310 and has substantially the same size. The outer diameter of the first connecting column 309 is smaller than the outer diameter of the rotating column 310 to accommodate the first ratchet 302.

[0121] See also Figures 17a to 17c The first ratchet 302 is sleeved on the outer circumference of the first connecting column 309, and the distal end surface of the first ratchet 302 abuts against the proximal end surface 308 of the rotating column 310 and is fastened by laser spot welding or the like. The outer edge of the first ratchet 302 has a plurality of rigid ratchet teeth or friction surfaces. In this embodiment, the outer edge of the first ratchet 302 has a plurality of ratchet teeth 306. The end of the first stop pawl 201 of the first limiting assembly 2 is inserted into the ratchet teeth 306 of the first ratchet 302 and meshes with the ratchet teeth 306. The first ratchet 302 is driven by the ratchet teeth 306 to perform stepping motion, and can only rotate in one direction, but cannot be reversed. When the first ratchet 302 rotates counterclockwise, the first stop pawl 201 is driven to swing, and the second elastic member 203 abutting against it presses the first stop pawl 201 so that it is always engaged with the ratchet teeth 306 of the first ratchet 302. At this time, the first stop pawl 201 slides on the back of the teeth of the first ratchet 302, and at the same time, the first stop pawl 201 prevents the first ratchet 302 from rotating in the clockwise direction.

[0122] See also Figures 17a to 17c The first base 205 is sleeved on the outer circumference of the first connecting column 309. The distal end surface of the first base 205 is connected to the proximal end surface of the first ratchet 302. The inner wall of the central axis hole 225 of the first base 205 is fixedly connected to the outer circumference of the first connecting column 309. The first stop claw 201, the second elastic member 203 and the first support 204 are all arranged between the distal end surface of the first base 205 and the proximal end surface of the first connecting column 309. The interlayer formed by the proximal end surface of the rotating wheel 301 and the distal end surface of the first base 205 restricts the first stop claw 201 from rotating around the first pin 202 without falling off.

[0123] See also Fig.17b The limiting ring 316 is annular, sleeved and fixed on the first connecting column 309 of the rotating wheel 301, and pressed on the distal end of the first base 205. In other words, the limiting ring 316 and the first ratchet 302 sandwich the first base 205 in the middle to limit the first base 205 in the axial direction.

[0124] See also Fig.17b , the distal end of the tangential drive shaft 102 is inserted into the axial hole of the rotating assembly 3 and is threadedly connected to the axial hole wall of the rotating assembly 3. Specifically, the axial hole of the first connecting column 309 of the rotating assembly 3 is provided with an internal thread 311, which is used to cooperate with the external thread 107 of the tangential drive shaft 102, so that the first connecting column 309 is threadedly connected to the distal end of the tangential drive shaft 102, thereby detachably connecting the implant 10 to the delivery assembly 20. Optionally, a portion of the internal thread 311 can also be set in the axial hole of the rotating column 310.

[0125] See also Fig.16c , four first oblique teeth 314 are arranged in a circumferential array on the distal end surface of the rotating column 310. A gradually ascending spiral channel 312 is arranged on the outer circumferential surface of the rotating column 310. The pitch of each first oblique tooth 314 is smaller than the pitch of the spiral channel 312, so that when the rotating wheel 301 is rotated, the height of the first oblique teeth 314 is smaller than the height of the spiral channel 312. Optionally, the first ratchet 302, the limiting ring 316 and the rotating wheel 301 are made of biocompatible metal materials, such as SUS304.

[0126] See also Fig.10 , the tangent assembly 5 is arranged on the rotating assembly 3. Specifically, the tangent assembly 5 is arranged on the outer surface of the rotating column 310, and further, the tangent assembly 5 is arranged between the outer peripheral surface of the rotating assembly 3 and the inner wall of the inner cavity of the housing 4. Specifically, the tangent assembly 5 is arranged in the first guide groove 402. The proximal end of the tangent assembly 5 is arranged in the spiral channel 312 to be slidably connected to the rotating assembly 3.

[0127] See also Fig.18a and Fig.18b The cutting assembly 5 includes a knife holder 508 and a blade 505 fixed at the distal end of the knife holder 508. The distal end of the blade 505 is a tip 504 arranged obliquely. The tip 504 of the blade 505 extends from the distal end surface 503 of the knife holder 508 and faces the suture 200 passing through the first through hole 712 to cut the suture 200. The distal end of the knife holder 508 has a slot for fixing the blade 505, and the proximal end of the knife holder 508 is provided with a hemispherical protrusion 501 for engaging with the spiral channel 312 of the rotating wheel 301, so as to fix the knife holder 508 in the spiral channel 312. The knife holder 508 is clearance-matched with the first guide groove 402 of the housing 4. Therefore, when the rotating wheel 301 rotates in the inner cavity 401 of the housing 4, the protruding column 501 of the knife holder 508 and the spiral channel 312 are meshed with each other, and the first guide groove 402 of the housing 4 cooperates with the knife holder 508, so that the blade 505 gradually moves away from the distal end surface of the rotating wheel 301, gradually abuts against the suture 200 and completes the tangent process. The knife holder 508 and the blade 505 are both made of biocompatible metal materials, preferably SUS304. The two can be integrally formed or fastened, and the connection method is preferably laser welding.

[0128] See also Figure 8a and Figure 8b , the proximal end of the moving component 6 abuts against the distal end of the rotating component 3.

[0129] See also Figures 19a to 19d The moving component 6 is a hollow structure. A proximal shaft hole 607 and a distal shaft hole 605 are provided at the center of the moving component 6. The proximal shaft hole 607 and the distal shaft hole 605 are connected. Moreover, the diameter of the distal shaft hole 605 is larger than the diameter of the proximal axial hole 607, so that the shaft hole of the moving component 6 has a second step surface 606 facing the distal end.

[0130] Optional, see Figure 8b The diameter of the proximal shaft hole 607 of the moving component 6 is equal to the diameter of the shaft hole of the rotating wheel 301 , so that the rotating connecting member 104 cooperates with the winding component 7 through the proximal shaft hole 607 of the moving component 6 .

[0131] See also Figures 19a to 19d The outer surface of the distal end of the moving component 6 is symmetrically provided with two third bosses 601, which respectively cooperate with the two second guide grooves 404 at the distal end of the housing 4, so that the moving component 6 can only move axially in the second guide groove 404 but cannot rotate circumferentially. The proximal surface of the moving component 6 is provided with four second bevel teeth 608 meshing with the first bevel teeth 314 of the rotating wheel 301.

[0132] See also Figure 8aWhen the tangent drive shaft 102 drives the rotating wheel 301 to rotate, the first bevel teeth 314 of the rotating wheel 301 and the second bevel teeth 608 of the moving assembly 6 generate relative displacement. Since the rotating wheel 301 cannot move in the axial direction, and the moving assembly 6 is restricted by the second guide groove 404 of the housing 4 and cannot rotate, the rotating wheel 301 rotates in situ, and the moving assembly 6 does not rotate but gradually compresses the suture 200 away from the rotating wheel 301 in the distal direction. At the same time, during the rotation of the rotating wheel 301, the tangent assembly 5 moves axially toward the distal end under the restriction of the first guide groove 402, that is, the blade of the tangent assembly 5 moves toward the suture 200. Since the ratio of the movement of the tangent assembly 5 and the moving assembly 6 in the same direction is equal to the ratio of the pitch of the spiral channel 312 to the pitch of the first bevel teeth 314, and the pitch of the spiral channel 312 is greater than the pitch of the first bevel teeth 314, the displacement of the tangent assembly 5 is greater than the displacement of the moving assembly 6. In other words, the distance that the cutting component 5 moves along the distal end is greater than the distance that the moving component 6 moves along the distal end. Therefore, when the moving component 6 moves to compress the suture 200, the cutting component 5 can further cut the suture 200.

[0133] See also Figure 8a The distal end of the winding drive 105 is detachably connected to the winding assembly 7 to drive the winding assembly 7 to rotate so that the suture 200 is wound around the outer circumference of the winding assembly 7.

[0134] See also Figures 20a to 20c The winding assembly 7 includes a first elastic member 703, a winding shaft 702 and a second ratchet 701 which are arranged in sequence from the proximal end to the distal end.

[0135] See also Figure 20d to Figure 20e The winding shaft 702 includes a second connecting column 714 located at the distal end, a rotating portion 710 located at the proximal end, and a wire passing portion 718 connected therebetween.

[0136] See also Figure 20d to Figure 20e The rotating portion 710 has a first slot extending in the axial direction. Figure 8a The first boss 118 of the rotating connecting member 104 is arranged in the first slot, so that the first boss 118 drives the winding shaft 702 of the winding assembly 7 to rotate when the winding driving member 105 rotates. Specifically, the first boss 118 can be a non-circular column such as a square block or a diamond block. The shape of the first slot is adapted to the first boss 118.

[0137] See also Figure 20d to Figure 20e The thread passing portion 718 is provided with a first through hole 712 in a radially penetrating waist shape for passing the suture 200. In the initial state, the two ends of the first through hole 712 are respectively connected to the two second through holes 411 and 410 on both sides of the housing 4.

[0138] See also Figure 8a , the first elastic member 703 can be a spring. The distal end of the first elastic member 703 fits with the proximal surface of the wire-passing portion 718, and the other end fits with the distal surface of the moving component 6. Specifically, the distal end of the first elastic member 703 abuts against the step surface on the winding shaft, and the proximal end of the first elastic member 703 abuts against the second step surface 606 of the moving component 6. Under the elastic force of the first elastic member 703, the moving component 6 and the rotating component 3 fit together, that is, the proximal inclined surface of the moving component 6 is tightly fitted with the distal inclined surface of the rotating component 3 under the action of the first elastic member 703. The distal end of the winding drive member 105 passes through the axial hole of the moving component 6 and the first elastic member 703 abuts against the first slot of the winding component 7.

[0139] See also Figures 20a to 20c The outer edge of the second ratchet 701 is provided with a plurality of ratchet teeth. The second ratchet 701 has an axial hole 705, and the second connecting column 714 of the winding shaft 702 extends into the inner surface of the second ratchet 701 through the axial hole 705 and is fixedly connected. The proximal end surface 706 of the second ratchet 701 is tightly connected to the distal end surface 716 of the winding shaft 702, and the connection method of the two includes but is not limited to laser spot welding. Optionally, the second ratchet 701 and the winding shaft 702 are both made of biocompatible metal materials, preferably SUS304.

[0140] like Fig.21 As shown, the second limiting assembly 8 has substantially the same structure and material as the first limiting assembly 2 , and the second limiting assembly 8 is used to limit the rotation direction of the second ratchet 701 , so that the second ratchet 701 can only rotate counterclockwise.

[0141] Specifically, please refer to 8 a , the second limiting component 8 is fixed to the inner wall of the shell 4 near the distal end surface of the shell 4 .

[0142] See also Fig.21 The second limiting assembly 8 includes a second base 805, a second stop claw 801 and a third elastic member 803 disposed on the second base 805. The second stop claw 801 is rotatably connected to the second base 805. The other end of the second stop claw 801 abuts against one end of the third elastic member 803. The third elastic member 803 is connected to the second base 805 through a second support 804.

[0143] See also Fig.21 The second stop claw 801 has a fourth through hole 806 extending in the axial direction. The second base 805 is provided with a central axis hole, a fifth through hole (blocked by the second support 804) and a sixth through hole (blocked by the second support 804) arranged outside the central axis hole. The central axis hole of the second base 805 is used to pass the distal end of the winding assembly 7. The sixth through hole cooperates with the second support 804, and the fifth through hole cooperates with the second pin 802.

[0144] See also Fig.21 The second stop claw 801 is swingably connected to the second base 805 through the second pin shaft 802. Specifically, one end of the second pin shaft 802 is gap-matched with the fourth through hole 806 of the second stop claw 801, and the other end of the second pin shaft 802 is gap-matched with the fifth through hole of the second base 805.

[0145] See also Fig.21 The other end of the second stopping claw 801 is provided with a second inclined surface 810 , and the second inclined surface 810 abuts against the ratchet teeth of the second ratchet wheel 701 of the winding assembly 7 to limit the rotation direction of the winding assembly 7 .

[0146] See also Fig.21 , the third elastic member 803 is connected to the second base 805 through the second support 804, that is, the second support 804 is fixedly connected to the second base 805, and is fixedly connected to the other end of the third elastic member 803. One end of the second support 804 is a cylinder, which is fixed in the sixth through hole, and the other end is fixedly connected to the third elastic member 803. The specific shape is not limited, as long as it can accommodate the third elastic member 803.

[0147] Optionally, the second base 805, the third elastic member 803, the second support 804, and the second pin 802 are made of weldable biocompatible metal, preferably SUS304. Optionally, the third elastic member 803 is a thin sheet made of stainless steel.

[0148] like Figure 8a and Fig.13a As shown, the bottom shell 9 is fixedly connected to the inner wall of the outer shell 4 near the distal end surface 409 of the outer shell 4. The proximal end surface 902 of the bottom shell 9 coincides with the distal end surface 407 of the outer shell 4 and is fixedly connected, preferably by laser welding.

[0149] like Figures 22a to 22c As shown, the bottom shell 9 is provided with two through holes 903, 904, which are used to be connected with the second base 805 of the second limiting assembly 8 through two pins. During assembly, the two pins pass through the two through holes 903, 904 of the bottom shell 9 and the two through holes 808, 809 of the second base 805, respectively, so that one end of the two head ends of the pins coincides with and is fixedly connected to the end surface 902 of the bottom shell 9, and the other end coincides with and is fixedly connected to the proximal end surface of the second base 805 of the second limiting assembly 8, and the second stop claw 801 and the second elastic member 203 are just located in the interlayer formed by the second base 805 of the second limiting assembly 8 and the bottom shell 9. The bottom shell 9 is made of metal material, preferably SUS304.

[0150] like Fig.23a and Figure 23bAs shown, in the initial state, both ends of the first through hole 712 of the wire passing portion 718 in the winding assembly 7 are respectively connected to the two second through holes 411 and 410 on both sides of the housing 4. The free end of the suture 200 passes through the second through hole 411 on one side of the housing 4, the first through hole 712, and the second through hole 410 on the other side of the housing 4 in sequence.

[0151] See also Figure 8a , Figures 24a to 24c After the suture 200 passes through the implant 10 through the two second through holes 411, 410 and the first through hole 712, the winding drive shaft 101 is rotated clockwise to drive the rotating connecting member 104 to rotate in the plane, and then drive the winding shaft 702 (see Fig.20a ) rotates clockwise synchronously, so that the suture 200 is gradually wound around the thread passing portion 718 of the winding shaft 702 (see Fig.20e ) on the outer circumference of the suture 200, thereby shortening the effective length of the suture 200. In this process, due to the effect of the second limiting assembly 8, the second ratchet 701 (see Fig.20a ) can only rotate clockwise and cannot rotate counterclockwise. The suture 200 is locked on the winding shaft 702 by relying on the friction between the suture 200, the outer surface of the thread passing part 718 and the inner surface of the shell 4.

[0152] See also Figure 8a , Fig.25 and Fig.26 When the suture 200 shrinks to the ideal state, the winding drive shaft 101 stops rotating, and then the tangent drive shaft 102 rotates clockwise. Since the thread 107 is a clockwise thread, the tangent drive shaft 102 drives the rotating wheel 301 (see Fig.17a ) is rotated clockwise, so that the distal end surface 604 (see Fig.19b ) gradually approaches the second base 805 of the second limiting assembly 8 (see Fig.21 ), thereby pressing the suture 200 between the distal end surface 604 of the moving component 6 and the proximal end surface of the second base 805 of the second limiting component 8, and another friction force is generated at this time. The double friction force can improve the locking force of the suture 200. In addition, while locking the suture 200, due to the spiral channel 312 of the rotating wheel 301 (see Fig.16a ) has a pitch greater than that of the first helical tooth 314 (see Fig.16a ) so that the displacement of the thread cutting assembly 5 is greater than the displacement of the moving assembly 6, so that the thread cutting assembly 5 cuts off the free end of the suture 200. After the suture 200 is cut, the thread cutting drive shaft 102 is rotated counterclockwise. Fig.20a) Under the action of the second limit assembly 8, it can only rotate clockwise but not counterclockwise, thereby disengaging the tangent drive shaft 102 from the rotating wheel 301, that is, disengaging the implant 10 from the conveying assembly 20, and then withdrawing the conveying assembly 20 to complete the locking and cutting of the suture 200.

[0153] The suture locking and cutting device 100 provided by the present invention is particularly suitable for interventional heart valve repair procedures, such as transcatheter mitral annuloplasty, transcatheter mitral valve edge-to-edge repair, etc.

[0154] The process of using the suture locking and cutting device 100 provided by the present invention for mitral valvuloplasty is as follows: Fig. 27 First, at least two anchors 3000 are implanted on the mitral valve ring 2000, and the anchors 3000 are connected to each other by sutures 200, and the two free ends of the sutures 200 extend outside the patient's body; the two free ends of the sutures 200 are sequentially passed through the second through hole 411 on one side of the housing 4, the first through hole 712 of the winding shaft 702, and the second through hole 410 on the other side of the housing 4 (see Fig.23a ); see Fig.28 , the distal end of the suture locking and cutting device 100 is sent along the suture 200 to the vicinity of the mitral valve; please refer to Figure 2 , the winding drive shaft 101 is driven to rotate clockwise by the control handle 125 outside the patient's body, and after the mitral regurgitation disappears or reaches the mildest state under ultrasound, the tangent drive shaft 102 is driven to rotate, so that the suture 200 can be locked and cut off, and the mitral valve ring shrinking process is completed, such as Fig.28 shown.

[0155] The suture locking and cutting device 100 of the present invention can also be used for edge-to-edge repair of the mitral valve, and the process is as follows: Fig.29 A set of sutures 200 with a gasket 4000 are implanted in the anterior leaflet and the posterior leaflet of the mitral valve, respectively. The sutures 200 and the gasket 4000 are U-shaped, and the free ends of the two sets of sutures 200 extend outside the patient's body; please refer to Fig.30 Then, the free ends of the two sets of sutures 200 are sequentially passed through the second through hole 411 on one side of the housing 4, the first through hole 712, and the second through hole 410 on the other side of the housing 4 (see Fig.23a ); see Fig.31 Then, the suture locking and cutting device 100 provided by the present invention is delivered to the subvalvular part, and the winding drive shaft 101 is driven to rotate clockwise by the control handle 125 outside the patient's body. After the mitral regurgitation disappears or reaches the mildest state under ultrasound, the tangent drive shaft 102 is driven to rotate, so that the suture 200 can be locked and cut off, and the edge-to-edge repair of the mitral valve is completed. Fig.31 shown.

[0156] The suture locking and cutting device 100 and the suture locking and cutting system 1000 provided by the present invention drive the winding assembly 7 to rotate to wind and lock the suture 200, and at this time, the suture 200 is locked by friction for the first time; in the process of driving the cutting assembly 5 to gradually approach the suture 200, the suture 200 can be pressed by friction for the second time, and the double friction can increase the locking force of the suture 200. In the process of pressing the suture 200 for the second time, the suture 200 is cut synchronously. Therefore, the suture locking and cutting system 100 provided by the present invention is The thread locking and cutting device 100 can realize the two processes of fixing and cutting the suture 200 through one device and one step, without the need to use a locking device and a thread cutting device separately, which greatly improves the functional diversity and structural compactness of the device; at the same time, the suture locking and cutting device 100 provided by the present invention causes little damage to the suture 200; the suture 200 is locked by two different friction forces, the locking force is higher, and the process of locking and cutting is more reliable; the thread cutting and locking are achieved simultaneously in one step, shortening the operation time and reducing the risk of surgery.

[0157] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A suture locking and cutting device, characterized in that: include: An implant, comprising a wire winding assembly and a wire cutting assembly, wherein the wire winding assembly has a first through hole for inserting the suture, and the wire cutting assembly comprises a blade, and the blade faces the suture passing through the first through hole; and The conveying assembly comprises a tangent drive shaft and a winding drive member movably installed in the tangent drive shaft, wherein the distal end of the winding drive member is detachably connected to the winding assembly to drive the winding assembly to rotate, so that the suture is wound around the outer peripheral surface of the winding assembly; the distal end of the tangent drive shaft is detachably connected to the tangent assembly to drive the blade to move toward the suture and cut the suture; The proximal end of the winding assembly has a first slot, the distal end of the winding drive is provided with a first boss adapted to the first slot, the first boss is arranged in the first slot, and when the first boss rotates with the winding drive, the first boss drives the winding assembly to rotate; The implant also includes a shell and a bottom shell covering the distal end of the shell, the wire winding assembly and the wire cutting assembly are both arranged in the shell, and the wire winding assembly is close to the bottom shell; The implant also includes a rotating assembly arranged in the shell and located on the side of the winding assembly away from the bottom shell, the tangent drive shaft is inserted and threadedly connected to the shaft hole of the rotating assembly; a spiral channel is arranged on the outer circumference of the rotating assembly, the tangent assembly is arranged between the outer circumference of the rotating assembly and the inner wall of the shell, and the proximal end of the tangent assembly is slidably connected to the rotating assembly in the spiral channel; The implant also includes a moving component arranged in the shell, the proximal end of the moving component abuts the distal end of the rotating component, the moving component and the rotating component are adapted through teeth, and the moving component does not rotate but can gradually compress the suture along the distal direction.

2. The suture locking and cutting device according to claim 1, characterized in that: The winding drive member includes a winding drive shaft and a rotating connecting member, and the rotating connecting member includes a second boss, an intermediate protrusion and the first boss that are interconnected as a whole. The second boss is arranged at the distal end of the winding drive shaft, and a first step surface is formed between the second boss and the intermediate protrusion, and the winding drive shaft abuts against the first step surface.

3. The suture locking and cutting device according to claim 1, characterized in that: A first guide groove is protruded along the axial direction on the side wall of the shell, and the cutting assembly is accommodated in the shell and the first guide groove.

4. The suture locking and cutting device according to claim 3, characterized in that: The side wall of the shell is further provided with two symmetrically arranged second through holes, wherein one of the second through holes is used for the suture to pass through the implant, and the other second through hole is connected to the first guide groove and is used for the suture to pass through the implant.

5. The suture locking and cutting device according to claim 4, characterized in that: Before the suture passes through the implant, the two second through holes are connected to the first through hole of the winding assembly.

6. The suture locking and cutting device according to claim 1, characterized in that: The shaft hole of the movable component has a second step surface facing the distal end, the proximal end of the winding component includes a first elastic member, the first elastic member elastically abuts against the second step surface, and the distal end of the winding drive member passes through the shaft hole of the movable component and the first elastic member and then abuts against the first slot of the winding component.

7. The suture locking and cutting device according to claim 6, characterized in that: The housing is further provided with at least one second guide groove, and the outer peripheral surface of the moving component is provided with at least one third boss, and the third boss is engaged in the second guide groove to prevent the moving component from rotating axially relative to the housing.

8. The suture locking and cutting device according to claim 7, characterized in that: The distal end of the rotating component is provided with a plurality of first oblique teeth along the circumferential direction, and the proximal end of the moving component is provided with a plurality of second oblique teeth meshing with the plurality of the first oblique teeth along the circumferential direction.

9. The suture locking and cutting device according to claim 8, characterized in that: The pitch of the spiral channel is greater than the pitch of the first helical teeth.

10. The suture locking and cutting device according to claim 1, characterized in that: A first ratchet is provided at the proximal end of the rotating assembly, and the implant also includes a first base, a first stopping claw and a second elastic member provided on the first base, the first base is connected to the proximal end of the first ratchet, the first stopping claw is rotatably connected to the first base, one end of the first stopping claw is engaged with the ratchet teeth of the first ratchet, and the other end of the first stopping claw abuts against one end of the second elastic member.

11. The suture locking and cutting device according to claim 1, characterized in that: A second ratchet is provided at the distal end of the winding assembly and a second ratchet is provided at the proximal end of the rotating assembly. The implant also includes a second base, a second stopping claw and a third elastic member provided on the second base. The second base is connected to the distal end of the second ratchet, and the second stopping claw is rotatably connected to the second base. One end of the second stopping claw is engaged with the ratchet teeth of the second ratchet, and the other end of the second stopping claw abuts against one end of the third elastic member.

12. The suture locking and cutting device according to claim 1, characterized in that: The delivery assembly further comprises a jaw, which is located at the distal end of the tangential drive shaft, and the distal end of the jaw is detachably connected to the proximal end of the housing of the implant.

13. The suture locking and cutting device according to claim 12, characterized in that: The distal end of the claw is provided with at least one fourth boss, the proximal end of the shell is provided with at least one second slot corresponding to the fourth boss, and the fourth boss is plugged into the second slot of the shell.

14. The suture locking and cutting device according to claim 12, characterized in that: The suture locking and cutting device also includes a control handle connected to the proximal end of the conveying assembly, and the control handle is provided with a winding drive switch and a tangent drive switch. The winding drive switch is connected to the proximal end of the winding drive member and is used to control the rotation of the winding drive member; the tangent drive switch is connected to the proximal end of the tangent drive shaft and is used to control the rotation of the tangent drive shaft.

15. A suture locking and cutting system, characterized in that: It comprises a guiding device and the suture locking and cutting device according to any one of claims 1 to 14, wherein the guiding device comprises a sheath tube and a bending adjustment handle connected to the proximal end of the sheath tube, the winding drive member and the tangent drive shaft are installed in the guiding device, and the distal end of the conveying assembly is located outside the distal end of the sheath tube and abuts against the sheath tube.

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