Closing device for mitral valve leaflet repair

Abstract

The invention discloses a closing device for mitral valve leaflet repair, and relates to the technical field of mitral valve leaflet repair. The clamp comprises an upper jaw assembly, one side of the upper jaw assembly is arranged to be in an opening shape, the inner wall of the opening is slidably connected with a positioning clamp assembly, the end of the positioning clamp assembly is provided with an outer protruding part, and the top of the upper surface of the outer protruding part is provided with a hook-shaped groove. According to the invention, the closing assembly continuously abuts against and approaches to finally realize connection between the port and the clamping arms, so that the closing assembly and the two clamping arms form an integrally formed structure, the closing assembly is connected with the bottom of the mitral valve, the first clamping arm and the second clamping arm are connected with the top of the mitral valve, and the mitral valve is tightly closed in a cardiac contraction period; blood of the left ventricle is prevented from flowing back to the left atrium, so that it is ensured that the blood can be pumped into the aorta from the left ventricle in the correct direction, the closing assembly can be closed without depending on external force, and compared with the prior art, an external operation structure used for controlling turning is omitted.

Description

Technical Field

[0001] The present invention relates to the technical field of mitral valve leaflet repair, and in particular to a closure device for mitral valve leaflet repair. Background Art

[0002] The main function of the mitral valve is to ensure one-way blood flow in the heart. During diastole, the pressure in the left atrium is higher than that in the left ventricle, the mitral valve opens, and blood flows from the left atrium to the left ventricle; during systole, the pressure in the left ventricle increases, and the mitral valve closes to prevent blood from flowing back into the left atrium. This one-way flow is essential for maintaining normal heart function and systemic blood circulation. Mitral valve closure is to fit the two leaflets of the mitral valve (anterior leaflet and posterior leaflet) tightly together to prevent blood from the left ventricle from flowing back into the left atrium.

[0003] A Chinese invention patent publication number CN106175845A discloses a closure device for repairing mitral valve leaflets, including a base, a pull rod that runs through the base and can be raised and lowered relative to the base, a hinged rod that is driven by the pull rod to move along the axial direction of the pull rod and can rotate relative to the pull rod, a connecting rod assembly that is fixed to the base at one end and hinged to the hinged rod at the other end, and a metal spring that is rotatably connected to one end of the hinged rod connected to the pull rod and symmetrically distributed about the hinged rod; the connecting rod assembly is provided with two and symmetrically arranged at both ends of the base, and the rotating pull rod clamps the position to be clamped of the mitral valve leaflet through the metal spring and the connecting rod assembly. The closure device for repairing mitral valve leaflets of the present invention can realize the rapid capture of the mitral valve leaflet, reduce the operation time and risk of surgery, and has a simple structure and low production cost, which reduces the medical expenses of patients.

[0004] However, when in use, the device needs to provide a driving torque to control the opening and clamping action of the clamping parts of the valve clamp instrument, and when the valve clamp instrument is separated from the delivery assembly, all the connecting structures that transmit the relevant driving forces need to be separated. The current clutch mechanism has a complicated disengagement process, and a too firm connection will lead to difficulty in separation, while a structure that is easily separated will lead to poor reliability. For this reason, we propose a closure device for mitral valve leaflet repair. Summary of the invention

[0005] The object of the present invention is to provide a closure device for repairing mitral valve leaflets to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a closing device for repairing mitral valve leaflets, comprising an upper jaw assembly, one side of the upper jaw assembly is arranged in an opening shape, a positioning clamp assembly is slidably connected to the inner wall of the opening, an outer protrusion is arranged at the end of the positioning clamp assembly, a hook-shaped groove is arranged at the top of the upper surface of the outer protrusion, a locking nut is movably clamped on the inner arc surface of the hook-shaped groove, and both ends of the outer arc surface of the locking nut are rotatably connected to the lower jaw assembly, one end of the lower jaw assembly is provided with a torsion elastic member, one end of the torsion elastic member is fixed to the side wall of the lower jaw assembly by a bolt, and the other end of the torsion elastic member is provided with two dividing strips, and the two dividing strips are rotatably connected to the upper and lower ends of the locking nut, respectively, and in a natural state, the torsion elastic member makes the positioning clamp assembly and the lower jaw assembly close to each other;

[0007] The positioning clamp assembly is slidably connected to a closing assembly inside, which is used to connect with the bottom of the mitral valve, and a clamping assembly is provided between the positioning clamp assembly and the lower jaw assembly, which is used to connect with the top of the mitral valve to achieve closure of the mitral valve during the systolic period of the heart;

[0008] One end of the lower jaw assembly is movably connected with a positioning block, and a clamping end is provided on one side of the positioning block. The positioning block is clamped with the lower jaw assembly through the clamping end. A fixing rod is installed inside the positioning block, and a microcatheter is connected to the fixing rod. The other end of the microcatheter is connected to the closing assembly, and a boss is installed on one side of the fixing rod, and a steering piece is inserted into the inside of the boss. A rotating part is detachably installed on the outside of the steering piece, and both sides of the rotating part are rotatably connected to the upper and lower surfaces of the positioning block through a rotating shaft.

[0009] Furthermore, a notch is provided at the front end of the upper jaw assembly, and a positioning groove is provided in the middle of the upper jaw assembly, a damping sliding protrusion is provided on one side of the upper surface of the upper jaw assembly, and guide secondary edges are provided on both sides of the upper jaw assembly close to the positioning groove, and the surfaces of the guide secondary edges are distributed on both sides of the positioning groove.

[0010] Furthermore, a convex portion is provided at the top of one side surface of the lower jaw assembly, and a snap-in groove is provided on the upper surface of the convex portion, and the snap-in groove is adapted to the locking nut. One side of the lower jaw assembly is a hollow through structure, and arc-shaped protrusions are installed at the bottom of the inner side walls of the positioning clamp assembly and the lower jaw assembly.

[0011] Furthermore, a closing clamping portion is provided at the front end of one side surface of the closing component, and a tooth-shaped object is provided on the inner arc surface of the closing clamping portion. There are two closing clamping portions, and spring sheets are connected to the top ends of the two closing clamping portions, and a bending part is fixedly connected to the side wall of a closing clamping portion close to the positioning clamp assembly.

[0012] Furthermore, the bending piece passes through the positioning slot of the upper jaw assembly, and one end of the bending piece extending to the outside of the upper jaw assembly is movably overlapped with a driving slide, an arc-folded surface is provided inside the driving slide, and one side of the driving slide is slidably engaged with the positioning slot, and ports are opened at the edges of both sides of the two closed clamping parts.

[0013] Further, the clamping assembly comprises a first clamping arm abutting against one of the closed clamping parts, a hook is provided at the top of the first clamping arm, a first groove is provided on one side of the outer arc surface of the first clamping arm, and a first protrusion is provided on the inner arc surface of the first groove;

[0014] A second clamping arm is tightly connected to the port of the closed clamping part on the other side, and a guide end is provided at the top of the outer arc surface of the second clamping arm. The guide end is movably connected to the hook, and a second groove is provided on the outer arc surface of the second clamping arm near the guide end, and a second protrusion is provided in the middle of the inner arc surface of the second groove.

[0015] Furthermore, a deformation through hole is provided at the connection between the first clamp arm and the second clamp arm, and tooth-shaped protrusions are fixedly mounted on the inner arc surfaces of the second clamp arm and the first clamp arm, and the tooth-shaped protrusions on both sides are meshed with each other.

[0016] Furthermore, the openings on one side of the second clamping arm and the first clamping arm correspond to the openings of the two closed clamping parts, and the inner arc surfaces of the first protrusion and the second protrusion are respectively in contact with the arc-shaped protrusions on the lower jaw assembly and the positioning clamp assembly.

[0017] Furthermore, a mounting hole is provided at one end of the steering plate, and the rotating member and the steering plate are connected by bolts.

[0018] Furthermore, one end of the micro-catheter is fixedly mounted on the driving slide plate through a pin shaft, and the other end passes through the positioning block and is connected to the fixing rod.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. In the present invention, when the driving slide moves, the driving slide will drive the bending part to move, and the bending part will drive the two closed clamping parts to slide along the positioning clamp assembly, and because the positioning clamp assembly and the lower jaw assembly are close to each other, the two always maintain an inverted "V" form. When the two closed clamping parts slide along the positioning clamp assembly, the two closed clamping parts will be subjected to the pressure of the jaws formed by the positioning clamp assembly and the lower jaw assembly and thus approach each other, so that the spring sheet at the rear end will change from a straight structure to an arch structure. In actual use, the jaws will be placed in the middle of the mitral valve in advance, and then the driving slide will be pushed to push the closing assembly to the bottom end of the mitral valve and adhere to the surface of the mitral valve, so that the mitral valve is closed under the action of the two closed clamping parts, so that there is no need to rely on external force to close the two closed clamping parts. Compared with the prior art, an external operating structure for controlling turning is saved.

[0021] 2. The present invention can drive the microcatheter to move by rotating the fixed rod, so that the microcatheter pushes the driving slide to move, which can drive the front jaw to enter the mitral valve and adjust the angle. Therefore, precise angle adjustment can improve the success rate and durability of mitral valve repair surgery. Compared with traditional surgical methods, it can better adapt to the individual differences of patients and reduce the possibility of re-deterioration of valve function after surgery, thereby reducing the risk and economic burden of patients needing another surgery.

[0022] 3. The present invention utilizes the continuous abutment and approach of the closing component to finally connect the port with the clamp arm, thereby forming an integral structure between the closing component and the two clamp arms, so that the closing component is connected to the bottom of the mitral valve, and the first clamp arm and the second clamp arm are connected to the top of the mitral valve. Therefore, during the heart's contraction period, the mitral valve is tightly closed to prevent the blood in the left ventricle from flowing back to the left atrium, thereby ensuring that the blood can be pumped from the left ventricle into the aorta in the correct direction, and then transported to various tissues and organs throughout the body, reducing the pressure in the left atrium and pulmonary veins, alleviating the symptoms of pulmonary congestion, and improving breathing.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention from a first viewing angle;

[0025] Figure 2 It is a cross-sectional schematic diagram of the overall structure of the present invention;

[0026] Figure 3 is a three-dimensional schematic diagram of the overall structure of the present invention from a second viewing angle;

[0027] Figure 4 It is a top cross-sectional schematic diagram of the overall structure of the present invention;

[0028] Figure 5 is a schematic diagram of the combination of the closing component and the clamping component of the present invention;

[0029] Figure 6 It is a three-dimensional schematic diagram of the clamping assembly structure of the present invention;

[0030] Figure 7 It is a schematic diagram of the internal structure of the positioning joint block of the present invention;

[0031] Figure 8 is a top cross-sectional schematic diagram of the clamping assembly structure of the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the upper jaw assembly and the positioning clamp assembly of the present invention;

[0033] Fig.10 It is a structural schematic diagram of the closing assembly and the positioning clamp assembly of the present invention.

[0034] Reference numerals:

[0035] 1. Upper jaw assembly; 101. notch; 102. positioning slide; 103. damping sliding protrusion; 104. guide secondary edge; 2. positioning clamp assembly; 205. outer protrusion; 206. hook-shaped groove; 3. locking nut; 4. lower jaw assembly; 401. convex part; 402. snap-fit ​​groove; 5. arc-shaped protrusion; 6. torsion elastic part; 601. separator; 7. closing assembly; 701. closing clamping part; 702. spring sheet; 703. bending part; 704. driving slide Plate; 705, port; 8, clamping assembly; 801, first clamping arm; 802, hook; 803, first protrusion; 804, second clamping arm; 805, guide end; 806, second groove; 807, second protrusion; 808, deformation through hole; 809, tooth-shaped protrusion; 8010, first groove; 9, positioning block; 901, clamping end; 10, fixing rod; 11, boss; 12, steering plate; 13, mounting hole; 14, rotating member; 15, microcatheter. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0037] See also Figure 1-Figure 10The present invention provides a technical solution: a closing device for repairing mitral valve leaflets, comprising an upper jaw assembly 1, one side of the upper jaw assembly 1 is set to an opening shape, a positioning clamp assembly 2 is slidably connected to the inner wall of the opening, an outer protrusion 205 is provided at the end of the positioning clamp assembly 2, a hook-shaped groove 206 is provided at the top of the upper surface of the outer protrusion 205, a locking nut 3 is movably clamped on the inner arc surface of the hook-shaped groove 206, and a lower jaw assembly 4 is rotatably connected at both ends of the outer arc surface of the locking nut 3, and a torsion elastic member 6 is provided at one end of the lower jaw assembly 4, one end of the torsion elastic member 6 is fixed to the side wall of the lower jaw assembly 4 by bolts, and two dividing strips 601 are provided at the other end of the torsion elastic member 6, and the two dividing strips 601 are respectively rotatably connected to the upper and lower ends of the locking nut 3, and in a natural state, the torsion elastic member 6 makes the positioning clamp assembly 2 and the lower jaw assembly 4 close to each other;

[0038] The interior of the positioning clamp assembly 2 is slidably connected with a closing assembly 7 for connecting with the bottom of the mitral valve, and a clamping assembly 8 is provided between the positioning clamp assembly 2 and the lower jaw assembly 4 for connecting with the top of the mitral valve to achieve closure of the mitral valve during the systolic period;

[0039] A positioning block 9 is movably connected to one end of the lower jaw assembly 4, and a clamping end 901 is provided on one side of the positioning block 9. The positioning block 9 is clamped with the lower jaw assembly 4 through the clamping end 901. A fixing rod 10 is installed inside the positioning block 9, and a microcatheter 15 is connected to the fixing rod 10. The other end of the microcatheter 15 is connected to the closing assembly 7. A boss 11 is installed on one side of the fixing rod 10, and a steering piece 12 is inserted inside the boss 11. A rotating member 14 is detachably installed on the outer side of the steering piece 12, and both sides of the rotating member 14 are rotatably connected to the upper and lower surfaces of the positioning block 9 through a rotating shaft.

[0040] According to the technical solution of this embodiment, a notch 101 is provided at the front end of the upper jaw assembly 1, and a positioning groove 102 is provided in the middle of the upper jaw assembly 1, a damping sliding protrusion 103 is provided on one side of the upper surface of the upper jaw assembly 1, and guide secondary edges 104 are provided on both sides of the upper jaw assembly 1 close to the positioning groove 102, and the surfaces of the guide secondary edges 104 are distributed on both sides of the positioning groove 102.

[0041] It should be noted that the notch 101 on one side of the upper jaw assembly 1 is for reserving space and serving as the front end according to the direction of the notch 101. At the same time, the positioning groove 102 opened on the surface of the upper jaw assembly 1 enables the installed components to slide inside the upper jaw assembly 1, and the upper jaw assembly 1 is a "C"-shaped structure, which can limit and guide the positioning clamp assembly 2. The positioning clamp assembly 2 is offset based on the installation angle of the upper jaw assembly 1, so the outer protrusion 205 of the positioning clamp assembly 2 is one end protruding from the upper jaw assembly 1, and the purpose of the outward extension of the outer protrusion 205 is to connect with the lower jaw assembly 4. The connection method is that the hook-shaped groove 206 on the outer protrusion 205 corresponds to the snap-in groove 402 on the lower jaw assembly 4, and then the two grooves are connected in series through the locking nut 3, so that the positioning clamp assembly 2 and the lower jaw assembly 4 can rotate with the locking nut 3 as the center of the circle.

[0042] The dividing strip 601 in the torsion elastic member 6 is elastic. Under the control of the torsion of the torsion elastic member 6, the positioning clamp assembly 2 and the lower jaw assembly 4 always keep close to each other without being acted upon by external forces. Since the elasticity of the torsion elastic member 6 itself is limited, the positioning clamp and the lower jaw are not completely closed when not acted upon by external forces. In view of this, the positioning clamp assembly 2 needs to be further controlled. Since the hook-shaped groove 206 set at the top of the positioning clamp assembly 2 is connected to the same fixed point as the torsion elastic member 6 on one side of the lower jaw assembly 4, when the positioning clamp assembly 2 moves, the hook-shaped groove 206 will pull the locking nut 3, thereby making the lower jaw assembly 4 installed on the locking nut 3 further close and close.

[0043] The function of the torsion elastic member 6 is to make the lower jaw assembly 4 as close to the positioning clamp assembly 2 as possible in the initial state. Because the smaller the contracted volume before entering the heart, the blood flow resistance will be reduced, so that it can enter more smoothly.

[0044] Therefore, the overall volume of the jaws is in a contracted state before entering the mitral valve of the heart, and expands after entering. In addition, the friction between the outer surfaces of the upper jaw component 1 and the lower jaw component 4 is small, so no damage to human tissue will be caused after entering, and no medical accident will occur.

[0045] According to the technical solution of this embodiment, a convex portion 401 is provided at the top of one side surface of the lower jaw assembly 4, and a snap-in groove 402 is provided on the upper surface of the convex portion 401. The snap-in groove 402 is compatible with the locking nut 3. One side of the lower jaw assembly 4 is a hollow through structure, and arc-shaped protrusions 5 are installed at the bottom of the inner side walls of the positioning clamp assembly 2 and the lower jaw assembly 4. The arc-shaped protrusions 5 are mainly used to limit the clamping assembly 8.

[0046] According to the technical solution of this embodiment, a closing clamping portion 701 is provided at the front end of one side surface of the closing component 7, and a tooth-shaped object is provided on the inner arc surface of the closing clamping portion 701. There are two closing clamping portions 701, and the top ends of the two closing clamping portions 701 are both connected to spring sheets 702, and a bent end 703 is fixedly connected to the side wall of a closing clamping portion 701 close to the positioning clamp assembly 2.

[0047] Furthermore, if Figure 4 When the lever 704 is in the unlocked position, the lever 704 is in the unlocked position, and the spring 705 is in the unlocked position, so that the lever 704 can be unlocked and the spring 705 can be unlocked. When the two closed clamping parts 701 slide along the positioning clamp assembly 2, the two closed clamping parts 701 will be pressed by the jaws formed by the positioning clamp assembly 2 and the lower jaw assembly 4 and thus approach each other, so that the spring sheet 702 at the rear end will change from a straight-line structure to an arch-shaped structure. In actual use, the jaws will be placed in the middle of the mitral valve in advance, and then the driving slide 704 will be pushed to push the closing assembly 7 to the bottom of the mitral valve and adhere to the surface of the mitral valve, so that the mitral valve is closed under the action of the two closed clamping parts 701, so that there is no need to rely on external force to close the two closed clamping parts 701, and compared with the prior art, an external operating structure for controlling the turning is saved.

[0048] According to the technical solution of this embodiment, a mounting hole 13 is provided at one end of the steering plate 12, and the rotating member 14 is connected to the steering plate 12 by bolts. The rotating member 14 rivets the positioning joint with the fixed rod 10 and the steering plate 12 together. The steering plate 12 rotates freely with the rotating member 14 as the axis, and the fixed rod 10 is connected with the positioning block 9 inserted by the steering plate 12, and the fixed rod 10 can rotate freely with the rotating member 14 as the front point.

[0049] With respect to the technical solution of this embodiment, one end of the microcatheter 15 is fixedly installed on the driving slide 704 through a pin shaft, and the other end passes through the positioning block 9 and is connected to the fixing rod 10. By rotating the fixing rod 10, the microcatheter 15 can be driven to move, so that the microcatheter 15 pushes the driving slide 704 to move, and the front jaws can be driven to enter the mitral valve and adjust the angle. Therefore, precise angle adjustment can improve the success rate and durability of mitral valve repair surgery. Compared with traditional surgical methods, it can better adapt to the individual differences of patients and reduce the possibility of re-deterioration of valve function after surgery, thereby reducing the risk and economic burden of patients needing another surgery.

[0050] The microcatheter 15 is a plastic tube of a certain length, with the front end tapering to facilitate insertion into the blood vessel, and the rear end that goes deeper is usually made of a soft material (such as silicone or polyurethane), which has good softness and elasticity, making it easy to insert into the body channel and reduce stimulation and damage. It should be noted that even if the rear end of the microcatheter 15 is made of a soft material, the softness is prepared to meet the requirements of rotating the fixing rod 10 so that the microcatheter 15 can push the driving slide 704.

[0051] According to the technical solution of this embodiment, the clamping assembly 8 includes a first clamping arm 801 abutting against one of the closed clamping parts 701, a hook 802 is provided at the top of the first clamping arm 801, a first groove 8010 is provided on one side of the outer arc surface of the first clamping arm 801, and a first protrusion 803 is provided on the inner arc surface of the first groove 8010;

[0052] A second clamping arm 804 is tightly connected to the port 705 of the closed clamping portion 701 on the other side, and a guide end 805 is provided at the top of the outer arc surface of the second clamping arm 804. The guide end 805 is movably connected to the hook 802. A second groove 806 is provided on the outer arc surface of the second clamping arm 804 near the guide end 805, and a second protrusion 807 is provided in the middle of the inner arc surface of the second groove 806.

[0053] Furthermore, a deformation through hole 808 is provided at the connection between the first clamp arm 801 and the second clamp arm 804 , and tooth-shaped protrusions 809 are fixedly installed on the inner arc surfaces of the second clamp arm 804 and the first clamp arm 801 , and the tooth-shaped protrusions 809 on both sides are meshed with each other.

[0054] Furthermore, the openings on one side of the second clamp arm 804 and the first clamp arm 801 correspond to the openings of the two closed clamping parts 701, and the inner arc surfaces of the first protrusion 803 and the second protrusion 807 are respectively abutted against the arc-shaped protrusions 5 on the lower jaw assembly 4 and the positioning clamp assembly 2.

[0055] The first clamp arm 801 and the second clamp arm 804 are preferably designed to be arc-shaped, and the guide end 805 is a V-shaped notch structure. The guide end 805 can be used to stably guide the eagle hook 802 to ensure that the clamping assembly 8 is stably closed. In addition, staggered tooth-shaped protrusions 809 are provided on the inner side walls of the first clamp arm 801 and the second clamp arm 804. After the first clamp arm 801 and the second clamp arm 804 are closed, the tooth-shaped protrusions 809 contact the clamped tissue. The staggered tooth-shaped protrusions 809 can not only play an anti-slip role, but also prevent mitral valve necrosis while ensuring the closure of the mitral valve. The deformation through hole 808 is preferably arc-shaped or annular, which can maintain the elasticity between the first clamp arm 801 and the second clamp arm 804, facilitate the elastic deformation of the connection between the two clamp arms, and make the two clamp arms fit more tightly after closing.

[0056] When in use, the first protrusion on the first clamp arm 801 is positioned and matched with the arc-shaped protrusion 5 on one side of the lower jaw assembly 4, and the second protrusion 807 on the second clamp arm 804 is positioned and matched with the arc-shaped protrusion 5 on the positioning clamp assembly 2, so that the jaws of the clamping assembly 8 can be stably opened and fixed on the two clamp head arms, and the port 705 is finally connected to the clamp arm by continuous abutment and approach of the closing assembly 7, so that an integral structure is formed between the closing assembly 7 and the two clamp arms, so that the closing assembly 7 is connected to the bottom of the mitral valve, and the first clamp arm 801 and the second clamp arm 804 are connected to the top of the mitral valve. Therefore, during the heart's contraction period, the mitral valve is tightly closed to prevent the blood in the left ventricle from flowing back to the left atrium, thereby ensuring that the blood can be pumped from the left ventricle into the aorta in the correct direction, and then transported to various tissues and organs throughout the body, reducing the pressure in the left atrium and pulmonary veins, alleviating the symptoms of pulmonary congestion, and improving breathing.

[0057] The use principle and process of the present invention are as follows: when it is needed to be used, the whole device is first placed into the ventricle, at which time the lower jaw assembly 4 and the upper jaw assembly 1 are close to each other, and then the fixing rod 10 is rotated to drive the steering piece 12 and the rotating member 14 to move, so that the front jaw can be driven to enter the mitral valve and adjust the angle, and the microcatheter 15 is driven to push the driving slide 704, so that the driving slide 704 moves and pushes the bending member 703 to move, thereby using the bending member 703 to drive the closing assembly 7 as a whole to move downward along the positioning clamp assembly 2. Since the positioning clamp assembly 2 and the lower jaw assembly 4 are close to each other, the two always maintain an inverted "V" form. When the two closed clamping parts 701 slide along the positioning clamp assembly 2, the two closed clamping parts 701 will be subjected to the pressure of the jaws formed by the positioning clamp assembly 2 and the lower jaw assembly 4 and then move close to each other. In this way, the spring sheet 702 at the rear end will change from a straight-line structure to an arched structure. An end is provided at the front end of the closed clamping part 701. The port 705 is connected to the clamp arm by the continuous contact and approach of the closing component 7. When the two closing clamping parts 701 in the closing component 7 are close to each other, the first clamp arm 801 and the second clamp arm 804 are driven to approach each other and engage with each other, thereby clamping the mitral valve to close it. After the clamping component 8 is closed, the tooth-shaped protrusions 809 will also contact the clamped tissue. The staggered tooth-shaped protrusions 809 can not only play an anti-slip role, but also prevent mitral valve necrosis while ensuring the closure of the mitral valve. In this way, the closing component 7 is connected to the bottom of the mitral valve, and the first clamp arm 801 and the second clamp arm 804 are connected to the top of the mitral valve. The mitral valve can be tightly closed during the heart contraction period to prevent the blood in the left ventricle from flowing back to the left atrium, thereby ensuring that the blood can be pumped from the left ventricle into the aorta in the correct direction, and then transported to various tissues and organs throughout the body, reducing the pressure in the left atrium and pulmonary veins, and alleviating the symptoms of pulmonary congestion.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on", "installed on", "fixed on" or "set on" another element, it can be directly on the other element or there can also be a centered element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A closure device for repairing a mitral valve leaflet, comprising an upper jaw assembly (1), characterized in that: One side of the upper jaw assembly (1) is arranged in an open shape, and a positioning clamp assembly (2) is slidably connected to the inner wall of the opening; an outer protrusion (205) is arranged at the end of the positioning clamp assembly (2); a hook-shaped groove (206) is arranged at the top of the upper surface of the outer protrusion (205); a locking nut (3) is movably clamped on the inner arc surface of the hook-shaped groove (206); both ends of the outer arc surface of the locking nut (3) are rotatably connected to the lower jaw assembly (4); a torsion elastic member (6) is arranged at one end of the lower jaw assembly (4); one end of the torsion elastic member (6) is fixed to the side wall of the lower jaw assembly (4) by bolts; and two partition bars (601) are arranged at the other end of the torsion elastic member (6); the two partition bars (601) are rotatably connected to the upper and lower ends of the locking nut (3) respectively; in a natural state, the torsion elastic member (6) makes the positioning clamp assembly (2) and the lower jaw assembly (4) close to each other. The positioning clamp assembly (2) is internally slidably connected with a closing assembly (7) for connecting with the bottom of the mitral valve, and a clamping assembly (8) is provided between the positioning clamp assembly (2) and the lower jaw assembly (4) for connecting with the top of the mitral valve to achieve closure of the mitral valve during the systolic period of the heart; A positioning block (9) is movably connected to one end of the lower jaw assembly (4), and a clamping end (901) is provided on one side of the positioning block (9). The positioning block (9) is clamped with the lower jaw assembly (4) via the clamping end (901). A fixing rod (10) is installed inside the positioning block (9), and a micro-catheter (15) is connected to the fixing rod (10). The other end of the micro-catheter (15) is connected to the closing assembly (7). A boss (11) is installed on one side of the fixing rod (10), and a steering plate (12) is inserted into the boss (11). A rotating member (14) is detachably installed on the outer side of the steering plate (12), and both sides of the rotating member (14) are rotatably connected to the upper and lower surfaces of the positioning block (9) via a rotating shaft.

2. A closure device for repairing mitral valve leaflets according to claim 1, characterized in that: The front end of the upper jaw assembly (1) is provided with a notch (101), and the middle part of the upper jaw assembly (1) is provided with a positioning groove (102), one side of the upper surface of the upper jaw assembly (1) is provided with a damping sliding protrusion (103), and both sides of the upper jaw assembly (1) close to the positioning groove (102) are provided with guide side edges (104), and the surfaces of the guide side edges (104) are distributed on both sides of the positioning groove (102).

3. A closure device for repairing mitral valve leaflets according to claim 2, characterized in that: A convex portion (401) is provided at the top of one side surface of the lower jaw assembly (4), and a snap-in groove (402) is provided on the upper surface of the convex portion (401). The snap-in groove (402) is matched with the locking nut (3). One side of the lower jaw assembly (4) is a hollow through structure, and arc-shaped convex parts (5) are installed at the bottom of the inner side walls of the positioning clamp assembly (2) and the lower jaw assembly (4).

4. A closure device for repairing mitral valve leaflets according to claim 2, characterized in that: A closing clamping portion (701) is provided at the front end of one side surface of the closing component (7), and a tooth-shaped object is provided on the inner arc surface of the closing clamping portion (701). There are two closing clamping portions (701), and the top ends of the two closing clamping portions (701) are both connected to a spring sheet (702), and a bending piece (703) is fixedly connected to the side wall of a closing clamping portion (701) close to the positioning clamp component (2).

5. A closure device for repairing mitral valve leaflets according to claim 4, characterized in that: The bending piece (703) is arranged to pass through the positioning groove (102) of the upper jaw assembly (1), and one end of the bending piece (703) extending to the outside of the upper jaw assembly (1) is movably overlapped with a driving slide (704), an arc-folded surface is arranged inside the driving slide (704), and one side of the driving slide (704) is slidably engaged with the positioning groove (102), and ports (705) are provided at the edges of both sides of the two closed clamping parts (701).

6. A closure device for repairing mitral valve leaflets according to claim 5, characterized in that: The clamping assembly (8) comprises a first clamping arm (801) abutting against one of the closed clamping parts (701), a hook (802) being provided at the top end of the first clamping arm (801), a first groove (8010) being provided on one side of the outer arc surface of the first clamping arm (801), and a first protrusion (803) being provided on the inner arc surface of the first groove (8010); A second clamping arm (804) is tightly connected to the port (705) of the closed clamping portion (701) on the other side, a guide end (805) is provided at the top end of the outer arc surface of the second clamping arm (804), and the guide end (805) is movably engaged with the hook (802), a second groove (806) is provided on the outer arc surface of the second clamping arm (804) near the guide end (805), and a second protrusion (807) is provided in the middle of the inner arc surface of the second groove (806).

7. A closure device for repairing mitral valve leaflets according to claim 6, characterized in that: A deformation through hole (808) is provided at the connection between the first clamp arm (801) and the second clamp arm (804), and tooth-shaped protrusions (809) are fixedly installed on the inner arc surfaces of the second clamp arm (804) and the first clamp arm (801), and the tooth-shaped protrusions (809) on both sides are meshed with each other.

8. The closure device for repairing mitral valve leaflets according to claim 7, characterized in that: The openings on one side of the second clamping arm (804) and the first clamping arm (801) correspond to the openings of the two closed clamping parts (701), and the inner arc surfaces of the first protruding part (803) and the second protruding part (807) are respectively in contact with the arc-shaped protrusions (5) on the lower jaw assembly (4) and the positioning clamp assembly (2).

9. A closure device for repairing mitral valve leaflets according to claim 8, characterized in that: A mounting hole (13) is provided at one end of the steering plate (12), and the rotating member (14) is connected to the steering plate (12) by means of bolts.

10. The closure device for repairing mitral valve leaflets according to claim 9, characterized in that: One end of the micro-catheter (15) is fixedly mounted on the driving slide plate (704) via a pin shaft, and the other end passes through the positioning block (9) and is connected to the fixing rod (10).

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