Medical lock and medical locking device

Abstract

The application provides a medical lock and a medical locking device. The medical lock comprises a lock body, a wire locking part, a push rod and a position locking structure. The wire locking part is movably arranged in the lock body; the distal end of the push rod abuts against the wire locking part. The push rod drives the wire locking part to move in the lock body so that the medical wire is clamped between the lock body and the wire locking part. The position locking structure can keep abutting or pulling the push rod, and the distal end of the push rod abuts against the wire locking part, thereby preventing the relative position of the wire locking part and the lock body from changing, keeping the gap between the wire locking part and the lock body for clamping the medical wire, effectively preventing the medical wire from loosening from between the wire locking part and the lock body, and thus realizing firm locking of the medical wire.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical lock and a medical locking device having the medical lock. Background Technology

[0002] In surgery, it is often necessary to knot and secure medical sutures (such as sutures, sutures used for artificial chordae tendineae, and sutures used for edge-to-edge valve repair). Traditional surgery is performed under direct visualization, and the knots are usually tied manually by the surgeon. However, with advancements in technology, various minimally invasive and interventional surgeries are becoming increasingly common, such as laparoscopic surgery and transcatheter interventional procedures. These surgeries only require a small incision in the patient's body to insert instruments such as endoscopes or interventional catheters to reach the predetermined sites for treatment. In these surgeries, if knotting or securing medical sutures is required, the operator typically needs to perform the knotting remotely from outside the patient's body through a small incision.

[0003] Existing technology discloses a medical locking device with a hollow inner cavity within the locking body. A locking pin moves axially along the inner cavity, gradually reducing the gap between the locking pin and the inner surface of the cavity to secure the suture threaded within it. However, since the suture is secured by the gradually decreasing gap between the locking pin and the inner surface of the cavity, the suture is constantly stretched during and after surgery. This can cause relative movement between the locking pin and the locking body, increasing the gap between the locking pin and the inner surface of the cavity. This leads to a decrease in the locking force on the suture and may even result in the suture coming loose from the locking device or the device falling off, posing a certain risk to the patient. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a medical lock and a medical locking device provided with the medical lock, in order to address the deficiencies of the prior art.

[0005] To address the aforementioned technical problems, this invention first provides a medical locking device for securing medical sutures, comprising a locking body, a suture locking component, a push rod, and a position locking structure. The suture locking component is movably disposed within the locking body, and the distal end of the push rod abuts against the suture locking component to drive the suture locking component to move within the locking body, thereby clamping the medical suture between the locking body and the suture locking component. With the medical suture clamped, the position locking structure abuts against or pulls the push rod to maintain the relative position of the suture locking component and the locking body.

[0006] The present invention also provides a medical locking device, including at least the medical locking buckle and a control component. The control component is detachably connected to the proximal end of the push rod. The control component is used to control the movement of the push rod, and the control component separates from the proximal end of the push rod after the relative position of the push rod and the locking buckle body remains unchanged.

[0007] The medical lock and the medical locking device provided by the present invention, due to the presence of the position locking structure, after the push rod drives the locking member to move within the lock body so that the medical thread is clamped between the lock body and the locking member, the position locking structure can maintain abutting or pulling against the push rod, and the distal end of the push rod abuts against the locking member, thereby preventing the relative position of the locking member and the lock body from changing, maintaining the gap between the locking member and the lock body to clamp the medical thread, effectively preventing the medical thread from loosening from between the locking member and the lock body, thereby achieving a secure lock on the medical thread. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of the first embodiment of the medical locking device of the present invention.

[0010] Figure 2 yes Figure 1 A three-dimensional structural diagram of the first embodiment of the lock used in traditional Chinese medicine.

[0011] Figure 3 yes Figure 2 A three-dimensional exploded diagram of a medical lock.

[0012] Figure 4 yes Figure 3 A three-dimensional structural diagram of the locking body from a first-view perspective.

[0013] Figure 5 yes Figure 3 A sectional view of the locking body and the stop component.

[0014] Figure 6 yes Figure 2 A schematic diagram of the end structure of the medical lock without the stop component.

[0015] Figure 7 yes Figure 2A side view of the initial state of the medical lock.

[0016] Figure 8 yes Figure 2 A side view of the medical lock in its locked state.

[0017] Figure 9 yes Figure 2 A cross-sectional view of the initial state of the medical lock.

[0018] Figure 10 yes Figure 2 A cross-sectional view of the medical lock in its locked state.

[0019] Figure 11 yes Figure 1 A three-dimensional structural diagram of the handle housing of a medical locking device.

[0020] Figure 12 yes Figure 11 A schematic diagram of the three-dimensional structure of the handle shell after removing its upper shell.

[0021] Figure 13 yes Figure 1 A cross-sectional view along line XIII-XIII.

[0022] Figure 14 yes Figure 12 A cross-sectional view of the control components.

[0023] Figure 15 yes Figure 12 A three-dimensional structural diagram of the limiting component in the diagram.

[0024] Figure 16 yes Figure 13 A three-dimensional structural diagram of the medical lock, part of the first inner core, and part of the second inner core.

[0025] Figures 17-26 This is a schematic diagram illustrating the usage process of the medical locking device provided in the first embodiment of the present invention, wherein... Figure 17 A schematic diagram showing sutures on the tricuspid valve. Figure 19 yes Figure 18 Enlarged cross-sectional view of the distal portion of a locking device used in traditional Chinese medicine. Figure 20 The diagram illustrates the medical locking device approaching the tricuspid valve along the suture line; Figure 22 yes Figure 21 Enlarged cross-sectional view of the distal portion of a locking device used in traditional Chinese medicine. Figure 24 yes Figure 23 Enlarged cross-sectional view of the distal portion of a locking device used in traditional Chinese medicine. Figure 26 yes Figure 25 Enlarged diagram of point XXVI.

[0026] Figure 27 This is a three-dimensional structural schematic diagram of the second embodiment of the medical lock of the present invention.

[0027] Figure 28 yes Figure 27 A three-dimensional exploded diagram of a medical lock.

[0028] Figure 29 yes Figure 27 A side view of the initial state of the medical lock.

[0029] Figure 30 yes Figure 27 A side view of the medical lock in its locked state.

[0030] Figure 31 yes Figure 27 A cross-sectional view of the initial state of the medical lock.

[0031] Figure 32 yes Figure 27 A cross-sectional view of the medical lock in its locked state.

[0032] Figures 33-38 This is a schematic diagram illustrating the usage process of the medical locking device provided in the second embodiment of the present invention; wherein, Figure 34 , Figure 36 , Figure 38 The diagram illustrates the state of the distal end of the medical locking device. Figure 33 , Figure 35 , Figure 37 They respectively indicate the corresponding Figure 34 , Figure 36 , Figure 38 The operating status on the handle shell. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Furthermore, the following descriptions of the embodiments are made with reference to the accompanying illustrations to illustrate specific embodiments in which the invention can be implemented. Directional terms used in this invention, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," and "side," are merely directional references to the accompanying illustrations. Therefore, the directional terms used are for better and clearer explanation and understanding of the invention, 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; therefore, they should not be construed as limitations on the invention.

[0035] Orientation definition: For clarity of description, the end closer to the operator during the operation will be referred to as the "proximal end" and the end farther from the operator will be referred to as the "distal end"; the axis refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device; the above definitions are only for convenience of expression and should not be construed as limiting the present invention.

[0036] Please see Figures 1 to 3 and Figures 7 to 10 The medical locking device 100 of the first embodiment of the present invention includes a medical lock 20, a handle shell 40, a control component 50, a support tube assembly 70, and a limiting component 80. The medical lock 20 is used to lock a medical suture 300 (the medical suture 300 can be a suture simply used for suturing incisions or ruptures, or a suture used for edge-to-edge repair of heart valves, a repair suture used for artificial chordae tendineae, or a suture implanted in internal human tissues such as valve annulus; the material of the medical suture 300 includes, but is not limited to, PTFE, e-PTFE, PET, UHMWPE, etc.). The medical lock 20 includes a lock body 21, a suture locking component 23, a push rod 25, and a position locking structure 27. The medical suture 300 is clamped between the locking body 21 and the locking member 23 by the distal end of the push rod 25. The control component 50 controls the push rod 25 to move the locking member 23 within the locking body 21, thus clamping the medical suture 300 between the locking body 21 and the locking member 23. The position locking structure 27 cooperates with the push rod 25. When the medical suture 300 is clamped between the locking body 21 and the locking member 23, the position locking structure 27 abuts against the push rod 25 to maintain the relative position of the locking member 23 and the locking body 21. The distal end of the control component 50 is detachably connected to the proximal end of the push rod 25, and the proximal end extends into the handle housing 40. The control component 50 separates from the push rod 25 after the relative position of the locking member 23 and the locking body 21 remains unchanged. The support tube assembly 70 extends distally from the handle housing 40 to accommodate the medical suture 20, the control component 50, and the limiting component 80. The distal end of the limiting component 80 is detachably connected to the locking body 21, and the proximal end extends into a handle housing 40, which is used to cooperate with the limiting structure provided on the locking body 21 to prevent the locking body 21 from moving during the process of the push rod 25 driving the locking wire component 23 to move within the locking body 21.

[0037] The medical latch 20 and medical locking device 100, due to the presence of a position locking structure 27, ensure that after the push rod 25 drives the locking member 23 to move within the latch body 21 so that the medical wire 300 is clamped between the latch body 21 and the locking member 23, the position locking structure 27 remains abutting against the push rod 25. The distal end of the push rod 25 also abuts against the locking member 23. Even if the medical wire 300 is pulled, it can prevent the relative position of the locking member 23 and the latch body 21 from changing, and the latch body 21 and the locking member 23 will not loosen. This maintains the gap between the locking member 23 and the latch body 21 to clamp the medical wire 300, effectively preventing the medical wire 300 from coming loose from between the locking member 23 and the latch body 21, thereby achieving a secure lock on the medical wire 300.

[0038] Specifically, please refer to the following: Figures 2 to 4 The locking body 21 has a receiving space 210 and a threading groove 211 that connects to the receiving space 210. The locking element 23 includes a pressure roller 230 that is movably received in the receiving space 210. The medical thread 300 is threaded between the threading groove 211 and the pressure roller 230. During the movement of the push rod 25 from the proximal end to the distal end of the locking body 21, it drives the pressure roller 230 to move in the receiving space 210 to change its position relative to the locking body 21, so that the gap between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211 gradually decreases until the medical thread 300 threaded in the gap is clamped.

[0039] The latch body 21 includes a distal end face 212, a proximal end wall 213, and two opposing first sidewalls 214 and two opposing second sidewalls 215 located between the distal end face 212 and the proximal end wall 213. The outer surfaces of the two first sidewalls 214 are parallel opposing planes, and the outer surfaces of the two second sidewalls 215 are opposing arc surfaces. The accommodating space 210 is formed by the two first sidewalls 214, the two second sidewalls 215, and the proximal end wall 213, and the distal end of the accommodating space 210 penetrates the distal end face 212 of the latch body 21. A wire-passing groove 211 communicates with the accommodating space 210; specifically, the wire-passing groove 211 is recessed downwards from the inner surface of one of the second sidewalls 215. Figure 4 As shown, the locking body 21 has support platforms 2150 on both sides opposite to the threading groove 211. The threading groove 211 extends axially, with one end passing through the distal end face 212 of the locking body 21 and the other end passing through a notch 216 located at the proximal end of the locking body 21. The medical thread 300 passes through the threading groove 211 and extends out from the notch 216.

[0040] In this embodiment, the latch body 21 has two mutually aligned guide grooves 2140 on the two first sidewalls 214. The guide grooves 2140 extend from the proximal end of the accommodating space 210 away from the notch 216 towards the distal end of the accommodating space 210 and gradually approach the bottom surface of the support platform 2150 and the threading groove 211. The locking member 23 also includes a roller 232 connected to the pressure roller 230, which is adapted to the guide grooves 2140. Further, after intersecting with the distal end of the support platform 2150, the guide grooves 2140 extend along the support platform 2150 towards the distal end and pass through the distal end surface 212 of the latch body 21. The outline of the guide grooves 2140 is preferably arc-shaped, and the arc bends toward the side where the threading groove 211 is located. The pressure roller 230 is generally cylindrical in shape and is fixedly sleeved in the middle of the roller 232. The pressure roller 230 and the roller 232 are coaxial, meaning that the two opposite ends of the roller 232 extend out of the opposite end faces of the pressure roller 230 along the axis of the roller 232. A baffle 234 is connected to each opposite end of the roller 232. The radial dimension of the baffle 234 along the roller 232 is larger than the width of the guide groove 2140 to prevent the locking element 23 from swaying significantly within the accommodating space 210 of the locking body 21.

[0041] In some other embodiments, since the diameter of the pressure roller 230 is larger than the width of the guide groove 2140, the baffles 234 at opposite ends of the roller 232 can also be omitted.

[0042] In some other embodiments, a guide rail (not shown) may be provided on the side wall of the latch body 21 corresponding to the accommodating space 210 instead of the guide groove 2140. The guide rail extends from the proximal end of the accommodating space 210 to the distal end of the accommodating space 210 and gradually approaches the bottom surface of the threading groove 211. The roller 23 is adapted to the guide rail. Further, two opposing guide rails are provided on the two first side walls 214 of the latch body 21. Each guide rail extends from the proximal end of the accommodating space 210 away from the notch 216 to the distal end of the accommodating space 210 and gradually approaches the threading groove 211. The two ends of the roller 232 are respectively rotatably mounted on two guide rails. The roller 232 rolls along the guide rails, driving the pressure roller 230 to roll. The pressure roller 230 gradually approaches the bottom surface of the threading groove 211, so that the medical thread 300 inserted in the threading groove 211 is clamped between the pressure roller 230 and the bottom surface of the threading groove 211.

[0043] Please refer to the following: Figure 5 and Figure 6The diameter of the pressure roller 230, the diameter of the medical thread 300, the height of the far end of the guide groove 2140, and the maximum height of the bottom surface of the threading groove 211 from the far end of the guide groove 2140 satisfy the following condition: 0≤H1-H2 / 2-D1 / 2≤D2, where H1 represents the maximum height of the bottom surface of the threading groove 211 from the far end of the guide groove 2140, H2 represents the height of the far end of the guide groove 2140, D1 represents the diameter of the pressure roller, and D2 represents the diameter of the medical thread. Specifically, when the pressure roller 230 clamps the medical thread 300 between itself and the bottom surface of the threading groove 211, the gap A between the portion of the outer circumference of the pressure roller 230 closest to the bottom surface of the threading groove 211 and the bottom surface of the threading groove 211 is equal to the maximum height of the bottom surface of the threading groove 211 from the far end of the guide groove 2140 minus half the height of the far end of the guide groove 2140 and half the diameter of the pressure roller 230, i.e., A = H1 - H2 / 2 - D1 / 2. To ensure that the outer circumference of the pressure roller 230 firmly clamps the medical thread 300 threaded in the gap A with the bottom surface of the threading groove 211, the diameter of the gap A cannot exceed the diameter of the medical thread 300. The axial length W1 of the pressure roller 230 is less than or equal to the width W2 of the threading groove 211, allowing the pressure roller 230 to enter the threading groove 211 without obstruction. When the push rod 25 pushes the pressure roller 230 axially to the far end, the roller 232 rolls in the guide groove 2140 and is guided by the guide groove 2140 to approach the bottom surface of the threading groove 211, which drives the pressure roller 230 to approach the bottom surface of the threading groove 211 until the medical thread 300 in the threading groove 211 is locked between the outer circumferential surface of the pressure roller 230 and the bottom surface of the threading groove 211.

[0044] like Figure 2 , Figure 3 , Figure 5 , Figure 9 and Figure 10As shown, in this embodiment, a locking screw hole 2131 and a limiting screw hole 2133 are provided at intervals on the proximal wall 213 of the latch body 21. The locking screw hole 2131 is closer to the middle of the proximal wall 213 than the limiting screw hole 2133. Preferably, the locking screw hole 2131 is coaxial with the latch body 21. Both the locking screw hole 2131 and the limiting screw hole 2133 extend axially, and the locking screw hole 2131 communicates with the accommodating space 210. The push rod 25 includes a rod body 251 and a radial protrusion 253 provided at the distal end of the rod body 251. The diameter of the radial protrusion 253 is larger than the diameter of the rod body 251. The rod body 251 is provided with a transmission thread 255, which is screwed into the locking screw hole 2131 on the latch body 21. When the push rod 25 is rotated, the transmission thread 255 helically moves within the locking screw hole 2131, and the push rod 25 moves axially synchronously relative to the locking body 21, pushing the pressure roller 230 to move distally. The pressure roller 230 gradually approaches the bottom surface of the threading groove 211 until the medical thread 300 between the pressure roller 230 and the threading groove 211 is pressed together. After this, the rotation of the push rod 25 is stopped, and the distal end of the push rod 25 is subjected to the pressure roller 230's pressure on the push rod due to pushing against the pressure roller 230. The axial force causes the transmission thread 255 on the push rod 25 to press against the threads on the locking screw hole 2131, achieving self-locking. This maintains the relative position of the pressure roller 230 and the threading groove 211. Even if the medical thread 300 is pulled, the position of the pressure roller 230 will not change, maintaining the gap between the pressure roller 230 and the threading groove 211 to clamp the medical thread 300, preventing the medical thread 300 from loosening, and maintaining a firm lock on the medical thread 300. That is, in this embodiment, the position locking structure 27 includes the locking screw hole 2131 on the latch body 21 and the transmission thread 255 on the push rod 25.

[0045] The position locking structure 27 also includes a stop 29 to limit the distal limit position of the locking wire member 23, preventing the locking wire member 23 from disengaging from the latch body 21. Figure 2 and Figure 3 As shown, the stop member 29 includes a baffle 291 and locking blocks 293 protruding from opposite sides of the proximal end face of the baffle 291. The proximal end face of the baffle 291 abuts against the distal end face 212 of the locking body 21. The two locking blocks 293 respectively engage with the distal openings of the two guide grooves 2140 of the locking body 21. The locking blocks 293 are used to stop the roller 232 from continuing to roll distally within the guide grooves 2140. The baffle 291 is used to limit the distal limit position of the pressure roller 230. Further, a threading hole 295 is provided on the baffle 291. The threading hole 295 connects to the threading groove 211 of the locking body 21. The medical thread 300 passes through the threading hole 295 and is then threaded into the threading groove 211.

[0046] Furthermore, such as Figure 3As shown, the proximal end of the push rod 25 is also connected to a first connector 28. After the push rod 25 is installed on the locking body 21, the first connector 28 is exposed outside the locking body 21. Specifically, the proximal end face of the push rod 25 is provided with a fixing hole 256 for fixing the first connector 28. The first connector 28 includes a connecting part 281 and a fixing post 283 located at the distal end of the connecting part 281. The fixing post 283 and the fixing hole 256 can be fixedly connected by screwing, welding, or other methods. The connecting part 281 is detachably connected to the distal end of the first inner core 51 in the control assembly 50 described later. In other embodiments, the first connector 28 and the push rod 25 can also be integrally formed.

[0047] The limiting screw hole 2133 on the locking body 21 and the two first side walls 214 form a limiting structure. The limiting screw hole 2133 is screwed to the limiting screw 83 at the far end of the limiting assembly 80 (described later) to prevent the locking body 21 from moving axially during the process of the push rod 25 driving the locking wire member 23 to move within the locking body 21. The planes of the two first side walls 214 are in contact with the corresponding planes in the inner cavity of the sleeve 71 of the support tube assembly 70 (described later) to prevent the locking body 21 from rotating during the process of the push rod 25 driving the locking wire member 23 to move within the locking body 21.

[0048] Please refer to the following: Figures 7 to 10 When using the medical locking buckle 20, a set of medical threads 300 are threaded between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211. The first connector 28 is driven to rotate, causing the push rod 25 to rotate relative to the locking screw hole 2131 while moving axially towards the far end. The radial protrusion 253 of the push rod 25 pushes the pressure roller 230, causing the locking element 23 to move along the guide groove 2140 toward the baffle 291 and the bottom surface of the threading groove 211. The gap between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211 gradually decreases until the medical thread 300 is clamped between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211. After that, because the drive thread 255 of the push rod 25 is threadedly locked with the locking screw hole 2131, the relative position of the locking body 21 and the locking element 23 can be prevented from changing, thus preventing the medical thread 300 from coming loose from between the locking element 23 and the locking body 21.

[0049] In this embodiment, the latch body 21, the locking wire 23, and the push rod 25 can all be, but are not limited to, made of biocompatible metal materials such as stainless steel, nickel-titanium, and pure titanium.

[0050] like Figure 11 and Figure 12As shown, the handle housing 40 includes an upper housing 41 and a lower housing 42 that are mated to each other, and a front-rotating member 43 that is threadedly engaged with the upper housing 41 and the lower housing 42. An outer tube fixing member 44 is fixedly installed in the inner cavity of the lower housing 42, and the proximal end of the outer tube 75 in the support tube assembly 70 is fixedly connected to the outer tube fixing member 44. A first baffle 46 and a second baffle 47, and a third baffle 48 and a fourth baffle 49, are provided at intervals inside the handle housing 40. Specifically, the first baffle 46 and the second baffle 47 are located in the middle of the proximal end of the inner cavity of the lower housing 42, and the third baffle 48 and the fourth baffle 49 are located near the middle of the proximal end of the inner cavity of the lower housing 42.

[0051] Please refer to the following: Figure 1 ,and Figures 11 to 16 The locking body 21 is movably inserted through the far end of the support tube assembly 70; the far end of the control assembly 50 is detachably connected to the push rod 25, and the proximal end extends out to form a handle housing 40; the far end of the limiting assembly 80 is screwed to the locking body 21, and the proximal end extends out to form a handle housing 40.

[0052] Specifically, the support tube assembly 70 includes a sleeve 71, a connecting sleeve 73, and an outer tube 75 connected sequentially from the distal end to the proximal end. The locking body 21 is movably inserted into the sleeve 71. The sleeve 71 has two opposing sides with planes that conform to the outer surfaces of the two first sidewalls 14 of the locking body 21. The planes of the first sidewalls 14 conform to the planes inside the sleeve 71 to prevent the locking body 21 from rotating during the movement of the locking element 23 within the locking body 21 driven by the push rod 25. The sleeve 71 has an inner cavity 711 extending axially through its distal and proximal ends. The locking body 21 is placed within the inner cavity 711 of the sleeve 71 and can only slide axially within the inner cavity 711. A wire exit notch 713 is opened at the proximal end of the outer peripheral wall of the sleeve 71 corresponding to the wire groove 211. The medical wire 300 in the wire groove 211 extends out of the support tube assembly 70 from the wire exit notch 713. The distal end face of the connecting cylinder 73 is fixedly attached to the proximal end face of the sleeve 71. The connecting cylinder 73 is provided with a first through groove 731 and a second through groove 733 at intervals along the axial direction. The first through groove 731 is located in the middle of the connecting cylinder 73 and aligned with the push rod 25, and the second through groove 733 is aligned with the limiting screw hole 2133 of the locking body 21. The proximal end of the connecting cylinder 73 is fixedly connected to the distal end of the outer tube 75. In this embodiment, the outer tube 75 is a flexible tube with a supporting effect and can be bent, so as to facilitate insertion into the human body cavity.

[0053] The control component 50 includes a first inner core 51 and a connecting rod 52 connected to the distal end of the first inner core 51. Specifically, the first inner core 51 is movably inserted into the outer tube 75. To accommodate the needs of human intervention, in this embodiment, the first inner core 51 is flexible and bendable. The distal end of the connecting rod 52 is provided with a second connector 521, which is detachably connected to the first connector 28 of the push rod 25. Further, the first connector 28 and the second connector 521 are respectively provided with complementary "Z", "S", toothed, or wavy concave-convex structures. When the first connector 28 and the second connector 521 are connected and inserted into the first through groove 731 of the connecting tube 73, their connection is maintained. When the first connector 28 and the second connector 521 lose the enclosure of the outer first through groove 731, such as when the distal end of the sleeve 71 is exposed, the second connector 521 and the first connector 28 can be disengaged to release their connection.

[0054] like Figure 14As shown, the control assembly 50 also includes a first control button 54 protruding from the proximal end of the handle housing 40 and a first cylindrical member 55 detachably connected to the first control button 54. The first control button 54 is disposed at the proximal end of the first cylindrical member 55. The proximal end of the first inner core 51 moves through the outer tube 75 and the outer tube fixing member 44 and is then fixedly connected to the first control button 54. When the relative position of the first cylindrical member 55 and the first control button 54 is locked, the first cylindrical member 55 can rotate with the first control button 54 and move axially together; when the relative position of the first cylindrical member 55 and the first control button 54 is not locked, the first control member 55 can move axially relative to the first cylindrical member 55. Specifically, the first control button 54 includes a hollow outer shell 541, a connecting post 543 extending axially within the outer shell 541, and an end cap 545 disposed at the proximal end of the outer shell 541 and fixedly connected to the connecting post 543. An annular guide groove 546 is provided between the connecting post 543 and the outer shell 541. The proximal end of the first cylindrical member 55 is slidably inserted into the guide groove 546 along the axial direction. A guide rod 551 protrudes axially from the distal end of the first cylindrical member 55. A guide hole 553 is provided axially in the middle of the proximal end face of the first cylindrical member 55. The connecting post 543 is slidably inserted into the guide hole 553. The proximal end of the first inner core 51 passes through the first cylindrical member 55 along the axial direction and is fixedly connected to the end cap 545. The guide rod 551 is movably fitted into notches respectively provided on the first baffle 46 and the second baffle 47. A first retaining ring 555 protruding circumferentially is provided on the guide rod 551. The first retaining ring 555 is located between the first baffle 46 and the second baffle 47, so that the first cylindrical member 55 can rotate relative to the first baffle 46 and the second baffle 47, and can move axially between the first baffle 46 and the second baffle 47. That is, the first retaining ring 555 can stop between the first baffle 46 and the second baffle 47. The housing 541 is provided with a screw hole 547 communicating with the guide groove 546 along its radial direction. The first control button 54 also includes a fastening screw 548 screwed into the screw hole 547. When the fastening screw 548 is tightened, the first cylindrical member 55 and the first control button 54 are fixed together to operate synchronously. Conversely, when the fastening screw 548 is loosened, the first cylindrical member 55 and the first control button 54 can operate separately. Preferably, a displacement indicator is also provided on the outer peripheral surface of the first cylindrical member 55, the displacement indicator being used to display the amount of axial movement of the first control button 54 relative to the first cylindrical member 55.

[0055] like Figure 12 , Figure 13 and Figure 15As shown, the distal end of the limiting component 80 is detachably connected to the locking body 21. The limiting component 80 cooperates with the limiting screw hole 2133 provided on the locking body 21 to prevent the locking body 21 from axially moving during the process of the push rod 25 driving the locking wire component 23 to move within the locking body 21. Furthermore, the limiting component 80 separates from the locking body 21 before the control component 50 separates from the proximal end of the push rod 25, so as not to obstruct the medical locking buckle 20 from being pushed out of the sleeve 71. Specifically, the limiting component 80 includes a second inner core 81 and a limiting screw 83 connected to the distal end of the second inner core 81. The second inner core 81 is movably inserted into the outer tube 75. To adapt to the needs of intervention in the human body, in this embodiment, the second inner core 81 is flexible and bendable. The limiting screw 83 is movably inserted into the second through groove 733 of the connecting tube 73, and the limiting screw 83 can be screwed into the limiting screw hole 2133 of the locking body 21. When the limiting screw 83 is screwed into the limiting screw hole 2133, the limiting screw 83 can prevent the locking body 21 from moving axially; after the limiting screw 83 is released from the limiting screw hole 2133, the locking body 21 can be driven by the push rod 25 to move axially.

[0056] The limiting assembly 80 also includes a second control button 84 protruding from the proximal end of the handle housing 40 and a second cylindrical member 85 fixedly connected to the second control button 84. The second control button 84 is located at the proximal end of the second cylindrical member 85. The proximal end of the second inner core 81 moves through the outer tube 75 and the outer tube fixing member 44 and is then fixedly connected to the second cylindrical member 85 or the second control button 84. The second cylindrical member 85 is movably embedded in notches respectively provided on the third baffle 48 and the fourth baffle 49. A second retaining ring 86 protruding circumferentially is provided on the second cylindrical member 85, and the second retaining ring 86 is located between the third baffle 48 and the fourth baffle 49. The second cylindrical member 85 can rotate relative to the third baffle 48 and the fourth baffle 49, and can move axially between the third baffle 48 and the fourth baffle 49, that is, the second retaining ring 86 can stop between the third baffle 48 and the fourth baffle 49.

[0057] Please see Figures 17 to 26 The following uses the tricuspid valve repair surgery as an example to illustrate the use of the medical locking device 100 provided in the first embodiment of the present invention.

[0058] The tricuspid valve is a one-way valve between the right atrium (RA) and the right ventricle (RV), ensuring blood flows from the right atrium to the right ventricle. A normal, healthy tricuspid valve has multiple chordae tendineae. The leaflets of the tricuspid valve are divided into anterior, posterior, and septal leaflets. When the right ventricle is in diastole, all three are open, allowing blood to flow from the right atrium to the right ventricle. When the right ventricle is in systole, the chordae tendineae are stretched, preventing the leaflets from being pushed into the atrium by the blood flow. The leaflets close properly, ensuring blood flows from the right ventricle through the pulmonary valve (PV) to the pulmonary artery. If the tricuspid valve is diseased, when the right ventricle is in systole, the leaflets may not close completely, and the force of the blood flow can cause leaflets to dislodge into the right atrium, resulting in blood regurgitation.

[0059] like Figure 17 As shown, before using the medical locking device 100, multiple medical sutures (which can be referred to as sutures in this example) 300 with elastic pads 310 are first implanted into the anterior leaflet, posterior leaflet, and septal leaflet of the tricuspid valve. The point contact between the sutures 300 and the leaflets is transformed into a surface contact between the elastic pads 310 and the leaflets, which can effectively reduce the risk of leaflet tearing; the free ends of the sutures 300 extend out of the body.

[0060] Step 1: As Figure 18 and Figure 19 As shown, multiple sutures 300 are threaded through the threading hole 295 into the threading groove 211 outside the patient's body and out through the exit notch 713. At this time, the pressure roller 230 is close to the proximal end of the locking body 21; the first connector 28 and the second connector 521 are inserted into the first through groove 731 of the connecting cylinder 73; the limiting screw 83 is screwed into the limiting screw hole 2133; the fastening screw 548 is tightened, and the first cylinder 55 is fixed together with the first control button 54; the first retaining ring 555 is attached to the first baffle 46; the second retaining ring 86 is attached to the third baffle 48.

[0061] Step 2: As Figure 20 As shown, and refer to Figure 21 and Figure 22Guided by sutures 300, the distal end of the support tube assembly 70 is pushed into the right atrium of the heart via an interventional pathway (such as the femoral vein or inferior vena cava), moving closer to the leaflets of the tricuspid valve. Simultaneously, the tightness of the sutures 300 on each leaflet is adjusted. Ultrasound is used to determine the state of least tricuspid regurgitation. When this state is reached, rotating the first control knob 54 causes the first inner core 51, connecting rod 52, and push rod 25 to rotate, causing the radial protrusion 253 at the distal end of the push rod 25 to abut against the pressure roller 230. The roller 232 moves along the guide groove 2140 towards... The movement of the bottom surfaces of baffle 291 and threading groove 211 gradually reduces the gap between the outer circumferential surface of pressure roller 230 and the bottom surface of threading groove 211 until the suture 300 is clamped between the outer circumferential surface of pressure roller 230 and the bottom surface of threading groove 211. A self-locking mechanism is formed between the transmission thread 255 on push rod 25 and the locking screw hole 2131 of locking body 21. At this time, the first retaining ring 555 of the first cylinder 55 moves axially from the first baffle 46 to abut against the second baffle 47, indicating that the medical locking buckle 20 has locked the suture 300. During this step, the limiting screw 83 remains screwed into the limiting screw hole 2133 to prevent the locking body 21 from moving axially to the distal end.

[0062] Step 3: Refer to Figure 21 and Figure 22 Rotate the second control knob 84 to drive the second inner core 81 to rotate. The second inner core 81 drives the limiting screw 83 to rotate relative to the locking body 21 until the limiting screw 83 disengages from the limiting screw hole 2133. At this time, the second retaining ring 86 moves from the third baffle 48 to abut against the fourth baffle 49.

[0063] Step 4: As Figure 23 and Figure 24 As shown, loosen the fastening screw 548 to release the relative lock between the first control button 54 and the first cylinder 55. Push the first control button 54 to the distal end to drive the first inner core 51 to move axially to the distal end. The first inner core 51 pushes against the push rod 25 and the entire medical lock 20 to protrude from the sleeve 71. The outer envelope of the first connector 28 and the second connector 521 disappears, and the connection between the first connector 28 and the second connector 521 is released.

[0064] Afterwards, remove the medical locking device 100, and then use a suture cutting device to cut the suture 300 outside the medical locking buckle 20. For example... Figure 25 and Figure 26 As shown, the medical lock 20 and the suture 300 locked by it are left in the heart. At this time, the leaflets of the tricuspid valve are pulled towards each other by multiple sutures 300, completing edge-to-edge repair.

[0065] Understandably, the above explanation uses edge-to-edge repair of the tricuspid valve as an example to illustrate the use of the medical locking buckle and locking device. This medical locking buckle and locking device can also be used for tricuspid valve chordae tendineae repair (using medical sutures as artificial chordae tendineae, with one end sewn onto the leaflet and the other end threaded onto an anchor anchored to the ventricular wall or papillary muscle and locked by the medical locking buckle), mitral valve edge-to-edge repair, mitral valve chordae tendineae repair, annulus reconstruction (multiple anchors are inserted into the annulus tissue, medical sutures are connected to the proximal ends of each anchor, the sutures are tightened to reduce the valve orifice area, and then locked by the medical locking buckle), and for locking and fixing medical sutures in other surgical procedures such as simple incision or tear suturing.

[0066] Please refer to the following: Figures 27 to 32 The structure of the medical latch 20a provided in the second embodiment of the present invention is similar to that of the first embodiment, but the position locking structure 27a of the medical latch 20a in the second embodiment is slightly different from the position locking structure 27 in the first embodiment. (Combined with...) Figures 33 to 38 The control component 50a of the second embodiment of the medical locking device is also slightly different in structure from the control component 50 in the first embodiment.

[0067] Specifically, such as Figures 27 to 32As shown, in this second embodiment, the position locking structure 27a includes a through hole 2135 that passes axially through the locking body 21a for the push rod 25a to move through, a radial protrusion 253 located on the distal end of the push rod 25a, and a compression elastic member 275 sleeved on the push rod 25a. The two ends of the compression elastic member 275 abut against the radial protrusion 253 and portions of the locking body 21a located around the through hole 2135, respectively. The radial protrusion 253 surrounds the distal end of the rod body 251 of the push rod 25a, and the outer diameter of the radial protrusion 253 is larger than the diameter of the rod body 251. The through hole 2135 axially penetrates the proximal end wall 213 of the locking body 21a and connects to the accommodating space 210. The diameter of the through hole 2135 is greater than or equal to the diameter of the rod 251, but smaller than the diameter of the radial protrusion 253. This allows the rod 251 to be movably inserted into the through hole 2135, and the radial protrusion 253 can stop in the through hole 2135 to prevent the push rod 25a from disengaging from the locking body 21a. In this embodiment, the compression elastic element 275 is preferably a compression spring. When the proximal end of the push rod 25a is not pulled by an external force, the compression spring 275 automatically springs open. The radial protrusion 253 at the distal end of the self-driving push rod 25a pushes against the pressure roller 230, causing the locking element 23 to move along the guide groove 2140 toward the bottom surface of the baffle 291 and the threading groove 211. The gap between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211 gradually decreases until the medical thread 300 is clamped between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211. After that, since the radial protrusion 253 at the distal end of the push rod 25a is always pushed by the compression spring toward the distal end, it can prevent the relative position of the locking body 21a and the locking element 23 from changing, and prevent the medical thread 300 from coming loose from the locking element 23 and the locking body 21a.

[0068] like Figure 33 , Figure 35 and Figure 37 As shown, the distance between the first baffle 46 at the proximal end of the first retaining ring 555 and the second baffle 47 at the distal end of the first retaining ring 555 in the control assembly 50a is smaller than the distance between the first baffle 46 and the second baffle 47 in the first embodiment. Specifically, in this second embodiment, the distance between the first baffle 46 and the second baffle 47 is equal to or slightly greater than the axial thickness of the first retaining ring 555. The first baffle 46 and the second baffle 47 are used to axially position the first retaining ring 555 to prevent the first cylinder 55 from being driven to move axially when the compression spring 275 springs open. A displacement mark 557 is provided on the outer peripheral surface of the first cylinder 55, and the displacement mark 557 includes the numbers "0", "1" and "2" spaced sequentially from the proximal end to the distal end.

[0069] like Figure 33 and Figure 34As shown, in the initial state of the medical locking device of the second embodiment, the numbers "0", "1" and "2" on the displacement indicator 557 are exposed outside the first control button 54. In the initial state, the fastening screw 548 is tightened, the first cylinder 55 is fixed together with the first control button 54, the compression elastic member 275 is in a compressed state, and the locking member 23 is located at the proximal end of the guide groove 2140.

[0070] like Figure 35 and Figure 36 As shown, in the second embodiment, when the medical lock is in the locked state, the fastening screw 548 is loosened, the compression elastic element 275 automatically springs open, and drives the first control button 54 to move axially to the distal end. The number "0" on the displacement indicator 557 has been covered by the first control button 54, while the numbers "1" and "2" are exposed outside the first control button 54. The compression elastic element 275 pushes the pressure roller 230 from the drive push rod 25 to lock the medical line 300, and the compression elastic element 275 continues to maintain elastic pressure on the pressure roller 230.

[0071] like Figure 37 and Figure 38 As shown, continue pushing the first control button 54 to the distal end until the number "1" on the displacement indicator 557 is covered by the first control button 54, while the number "2" is exposed. The first control button 54 drives the first inner core 51 to move axially to the distal end. The first inner core 51 pushes against the push rod 25a and the entire medical lock 20a, which are exposed outside the sleeve 71. The outer envelope of the first connector 28 and the second connector 521 disappears, and the connection between the first connector 28 and the second connector 521 can be released.

[0072] In other embodiments, the position of the first control button 54 and the first cylindrical member 55 can be relatively defined or undefined by the cooperation of the positioning rod and the positioning hole. Specifically, the outer peripheral surface of the first cylindrical member 55 is provided with a first positioning hole in the radial direction, and the outer peripheral wall of the first control button 54 is provided with a second positioning hole corresponding to the first positioning hole. When the positioning rod is inserted into the first positioning hole and the second positioning hole, the position of the first control button 54 and the first cylindrical member 55 is relatively defined. When the positioning rod inserted into the first positioning hole and the second positioning hole is pulled out, the first control button 54 can move axially relative to the first cylindrical member 55.

[0073] It is understood that in other embodiments, a tension elastic element such as a tension spring may be used instead of the compression elastic element 275 in the second embodiment described above. (Comparison) Figures 29 to 32When a tension elastic element is used, the tension elastic element is no longer located within the receiving space 210 of the locking body 21a, but is located outside the receiving space 210. One end of the tension elastic element still abuts against the part of the locking body 21a located on the periphery of the through hole 2135, while the other end extends proximally and connects to the proximity of the push rod 25a, such as by welding. When the push rod 25a is subjected to an external force toward its proximal end, the tension elastic element is stretched open; when the external force on the push rod 25a is released, the tension elastic element automatically contracts, and the distal end of the self-driving push rod 25a pushes the pressure roller 230, causing the locking element 23 to move along the guide groove 2140 toward the bottom surface of the baffle 291 and the threading groove 211. The gap between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211 gradually decreases until the medical thread 300 is clamped between the outer peripheral surface of the pressure roller 230 and the bottom surface of the threading groove 211. After that, since the proximal end of the push rod 25a is always subjected to the tension force of the tension elastic element toward its distal end, the relative position of the locking body 21a and the locking element 23 can be prevented from changing, thus preventing the medical thread 300 from coming loose from the locking element 23 and the locking body 21a. That is, in this embodiment, when the medical thread is clamped, the position locking structure pulls the push rod 25a to maintain the relative position of the locking member 23 and the locking body 21a.

[0074] The above are the embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of the present invention, and these improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A medical locking device for securing medical sutures, characterized in that, include: Lock body; A locking wire component, which is movably disposed within the latch body; A push rod, the distal end of which abuts against the locking member to drive the locking member to move within the locking body, so that the medical thread is clamped between the locking body and the locking member; The position locking structure includes a through hole that passes through the latch body axially to allow the push rod to move through, and an elastic element sleeved on the push rod. One end of the elastic element abuts against the periphery of the through hole, and the other end abuts against the distal end of the push rod or connects to the proximal end of the push rod. When the medical suture is clamped, the position locking structure abuts against or pulls the push rod to maintain the relative position of the suture locking component and the locking body.

2. The medical lock according to claim 1, characterized in that, The locking body has an accommodating space and a threading groove communicating with the accommodating space. The locking element includes a pressure roller that is movably accommodated in the accommodating space. The medical thread is threaded between the threading groove and the pressure roller. As the push rod moves from the proximal end to the distal end of the locking body, it drives the pressure roller to move in the accommodating space, causing the gap between the pressure roller and the bottom surface of the threading groove to gradually decrease.

3. The medical lock according to claim 2, characterized in that, The locking body is provided with a guide rail or guide groove on the side wall corresponding to the accommodating space. The guide rail or guide groove extends from the near end of the accommodating space to the far end of the accommodating space and gradually approaches the bottom surface of the threading groove. The locking component also includes rollers connected to both sides of the pressure roller. The rollers are adapted to the guide rail or guide groove.

4. The medical lock according to claim 3, characterized in that, The diameter of the pressure roller, the diameter of the medical thread, the height of the far end of the guide groove or guide rail, and the maximum height of the bottom surface of the threading groove from the far end of the guide groove or guide rail satisfy the following condition: 0 ≤ H1 - H2 / 2 - D1 / 2 ≤ D2, where H1 represents the maximum height of the bottom surface of the threading groove from the far end of the guide groove or guide rail, H2 represents the height of the far end of the guide groove or guide rail, D1 represents the diameter of the pressure roller, and D2 represents the diameter of the medical thread.

5. The medical lock according to claim 1, characterized in that, The proximal end of the push rod is connected to a first connector, which is exposed outside the locking body.

6. The medical lock according to claim 1, characterized in that, The latch body is provided with a limiting structure, which is used to prevent the latch body from moving during the process of the push rod driving the locking wire component to move within the latch body.

7. The medical lock according to any one of claims 1-6, characterized in that, The position locking structure includes a screw hole that passes through the latch body axially, and a transmission thread provided on at least part of the outer surface of the push rod, the transmission thread being adapted to the screw hole.

8. The medical lock according to claim 7, characterized in that, The position locking structure further includes a stop connected to the distal end of the latch body, the stop defining the extreme position of the distal end of the locking wire member.

9. The medical lock according to claim 1, characterized in that, The position locking structure further includes a stop connected to the distal end of the latch body, the stop defining the extreme position of the distal end of the locking wire member.

10. A medical locking device, characterized in that, The device includes a medical locking device and a control component as described in any one of claims 1-9, wherein the control component is detachably connected to the proximal end of the push rod, the control component is used to control the movement of the push rod, and the control component separates from the proximal end of the push rod after the relative position of the push rod and the locking device body remains unchanged.

11. The medical locking device according to claim 10, characterized in that, It also includes a limiting component, which is detachably connected to the latch body. The limiting component cooperates with a limiting structure provided on the latch body to prevent the latch body from moving axially during the process of the push rod driving the locking wire member to move within the latch body. The limiting component is separated from the latch body before the control component separates from the proximal end of the push rod.

12. The medical locking device according to claim 11, characterized in that, It also includes a support tube assembly, wherein the locking body is movably inserted into the distal end of the support tube assembly, and the control component and the limiting component are movably inserted into the support tube assembly and extend out of the proximal end of the support tube assembly.

13. The medical locking device according to claim 12, characterized in that, The support tube assembly includes a sleeve, a connecting tube, and an outer tube connected sequentially from the distal end to the proximal end; the locking body is movably inserted into the sleeve, and the sleeve cooperates with a limiting structure provided on the locking body to prevent the locking body from rotating during the process of the push rod driving the locking wire component to move within the locking body; the connecting tube is provided with a cavity surrounding the distal end of the control component.

14. The medical locking device according to claim 13, characterized in that, The control component includes a first inner core and a connecting rod connected to the distal end of the first inner core, the distal end of the connecting rod being detachably connected to the proximal end of the push rod; the limiting component includes a second inner core and a limiting screw connected to the distal end of the second inner core, the limiting structure provided on the latch body includes a limiting screw hole arranged along the axial direction, and the limiting screw is screwed to the limiting screw hole.

15. The medical locking device according to claim 14, characterized in that, The control assembly further includes a first control button fixedly connected to the proximal end of the first inner core and a first cylindrical component sleeved on the outside of the first inner core and detachably connected to the first control button; the limiting assembly further includes a second control button fixedly connected to the proximal end of the second inner core and a second cylindrical component sleeved on the outside of the second inner core and fixedly connected to the second control button.

16. The medical locking device according to claim 15, characterized in that, It also includes a handle housing, the proximal end of the outer tube being fixedly connected to the handle housing, and the first inner core and the second inner core extending within the handle housing; The first cylindrical part is disposed inside the handle housing. A first retaining ring is provided on the first cylindrical part. A first baffle and a second baffle are disposed at intervals inside the handle housing. The first retaining ring is located between the first baffle and the second baffle. The second cylindrical part is disposed inside the handle housing, and a second retaining ring is provided on the second cylindrical part. A third baffle and a fourth baffle are disposed at intervals inside the handle housing, and the second retaining ring is located between the third baffle and the fourth baffle.

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