A closure device for repairing mitral valve leaflets

Abstract

The present invention discloses a closure device for mitral valve leaflet repair, which relates to the technical field of mitral valve leaflet repair. The present invention includes an upper jaw assembly, one side of the upper jaw assembly is set to an opening shape, and a positioning clamp assembly is slidably connected to the inner wall of the opening. The end of the positioning clamp assembly is provided with an outer protrusion, and the top of the upper surface of the outer protrusion is provided with a hook-shaped groove. The present invention utilizes the continuous abutment and approach of the closure assembly to finally connect the port with the clamp arm, thereby forming an integrated structure between the closure assembly and the two clamp arms, so that the closure assembly 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 systole of the heart, the mitral valve is tightly closed, preventing blood from the left ventricle from flowing back to the left atrium, thereby ensuring that blood can be pumped from the left ventricle into the aorta in the correct direction, and the closure assembly can be closed without relying on external force. Compared with the existing technology, the external operating structure for controlling the turning is saved.

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 primary function of the mitral valve is to ensure unidirectional blood flow within the heart. During diastole, when pressure in the left atrium is higher than that in the left ventricle, the mitral valve opens, allowing blood to flow from the left atrium into the left ventricle. During systole, when pressure in the left ventricle rises, the mitral valve closes, preventing blood from flowing back into the left atrium. This unidirectional flow is crucial for maintaining normal heart function and systemic blood circulation. Mitral valve closure involves tightly fitting the two leaflets (anterior and posterior) of the mitral valve together, preventing blood from flowing back into the left atrium.

[0003] A Chinese invention patent publication numbered CN106175845A discloses a closure device for repairing mitral valve leaflets, comprising a base, a pull rod extending through the base and capable of being raised and lowered relative to the base, a hinged rod driven by the pull rod to move axially along the pull rod and rotatable relative to the pull rod, a connecting rod assembly having one end fixed to the base and the other end hinged to the hinged rod, and a metal spring rotatably connected to one end of the pull rod and symmetrically distributed about the hinged rod; the connecting rod assembly is provided with two symmetrically disposed at both ends of the base, and the pull rod is rotated to clamp the mitral valve leaflets at the position to be clamped via the metal spring and the connecting rod assembly. The closure device for repairing mitral valve leaflets of the present invention can achieve rapid capture of the mitral valve leaflets, reducing surgical operation time and risk, and has a simple structure and low production cost, thereby reducing the patient's medical expenses.

[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. Moreover, when the valve clamp instrument is separated from the delivery assembly, all the connection 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 make separation difficult, 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 set to an opening shape, the inner wall of the opening is slidably connected to a positioning clamp assembly, the end of the positioning clamp assembly is provided with an outer protrusion, the top of the upper surface of the outer protrusion is provided with a hook-shaped groove, the inner arc surface of the hook-shaped groove is movably engaged with a locking nut, 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 bars, which are rotatably connected to the upper and lower ends of the locking nut respectively. 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 internally slidably connected to a closing assembly for connecting to the bottom of the mitral valve, and a clamping assembly is provided between the positioning clamp assembly and the lower jaw assembly for connecting to the top of the mitral valve to achieve closure of the mitral valve during systole;

[0008] One end of the lower jaw assembly is movably connected to a positioning block, and a clamping end is provided on one side of the positioning block. The positioning block is engaged 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. 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 sub-edges are provided on both sides of the upper jaw assembly close to the positioning groove, and the surfaces of the guide sub-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, which 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 the top ends of the two closing clamping portions are connected to spring sheets, 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 slide groove of the upper jaw assembly, and the end of the bending piece extending to the outside of the upper jaw assembly is movably overlapped with a driving slide, the interior of the driving slide is provided with an arc-shaped surface, and one side of the driving slide is slidably engaged with the positioning slide groove, and ports are opened at the edges of both sides of the two closed clamping parts.

[0013] Furthermore, the clamping assembly includes 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 clamping arm and the second clamping arm, and tooth-shaped protrusions are fixedly mounted on the inner arc surfaces of the second clamping arm and the first clamping 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 respectively abut against 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 microcatheter is fixedly mounted on the driving slide via 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 closing 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 closing clamping parts slide along the positioning clamp assembly, the two closing 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 closing clamping parts, so that there is no need to rely on external force to close the two closing clamping parts. Compared with the prior art, an external operating structure for controlling the 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 re-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 vein, 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 perspective 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 This is a schematic diagram of the internal structure of the positioning joint of the present invention;

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

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

[0033] Figure 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. Lock nut; 4. Lower jaw assembly; 401. Protruding portion; 402. Snap-fit ​​groove; 5. Arc-shaped protrusion; 6. Torsion elastic member; 601. Separator; 7. Closing assembly; 701. Closing clamp; 702. Spring leaf; 703. Bending member; 704. Drive 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 part; 15, microcatheter. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying 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 embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0037] See also Figures 1-10The 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, and 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, and a hook-shaped groove 206 is provided on the top of the upper surface of the outer protrusion 205, and a locking nut 3 is movably engaged with the inner arc surface of the hook groove 206, and both ends of the outer arc surface of the locking nut 3 are rotatably connected to the lower jaw assembly 4, and one end of the lower jaw assembly 4 is provided with a torsion elastic member 6, one end of the torsion elastic member 6 is fixed to the side wall of the lower jaw assembly 4 by a bolt, and the other end of the torsion elastic member 6 is provided with two dividing bars 601, and the two dividing bars 601 are rotatably connected to the upper and lower ends of the locking nut 3 respectively. In the 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 internal sliding connection of the positioning clamp assembly 2 is provided 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 systole;

[0039] One end of the lower jaw assembly 4 is movably connected to a positioning block 9, and a clamping end 901 is provided on one side of the positioning block 9. The positioning block 9 is engaged 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 into the inside of the boss 11. A rotating part 14 is detachably installed on the outside of the steering piece 12, and both sides of the rotating part 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 sub-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 sub-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 serves 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 through the hook-shaped groove 206 on the outer protrusion 205 corresponding to the snap-in groove 402 on the lower jaw assembly 4, and then the two slots 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 spacer strip 601 in the torsion spring 6 is also elastic. Under the control of the torsion of the torsion spring 6, the positioning clamp assembly 2 and the lower jaw assembly 4 always remain close to each other in the absence of external forces. However, due to the limited elasticity of the torsion spring 6 itself, the positioning clamp and the lower jaw are not completely closed when no external forces are applied. In view of this, the positioning clamp assembly 2 needs to be further controlled. Because the hook-shaped groove 206 at the top of the positioning clamp assembly 2 is connected to the torsion spring 6 on one side of the lower jaw assembly 4 at the same fixed point, when the positioning clamp assembly 2 moves, the hook-shaped groove 206 will pull the locking nut 3, thereby causing the lower jaw assembly 4 mounted on the locking nut 3 to move closer 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, thereby enabling smoother entry.

[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 the bottom of the inner side wall of the positioning clamp assembly 2 and the lower jaw assembly 4 are both installed with an arc-shaped protrusion 5, which is 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 tops 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] Further, if Figure 4 When the cam 704 is in the unlocked position, the cam 704 is in the unlocked position, and the cam 704 is locked, so that the cam 704 is locked. When the two closing clamps 701 slide along the positioning clamp assembly 2, the two closing clamps 701 will be subjected to the pressure of 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 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 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 closing clamps 701, so that there is no need to rely on external force to close the two closing clamps 701, which saves the external operating structure for controlling the turning compared with the prior art.

[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 to the positioning block 9 inserted through the steering plate 12. The fixed rod 10 will rotate freely with the rotating member 14 as the front point.

[0049] According 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 can drive the front end jaws 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 requiring re-surgery.

[0050] The microcatheter 15 is a plastic tube of a certain length, with the front end gradually tapering to facilitate insertion into the blood vessel, while 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 reducing irritation and damage. It should be noted that even if the rear end of the microcatheter 15 is made of a soft material, the degree of 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 that abuts against one of the closed clamping portions 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. 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. 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 clamping arm 801 and the second clamping arm 804 , and tooth-shaped protrusions 809 are fixedly installed on the inner arc surfaces of the second clamping arm 804 and the first clamping arm 801 , and the tooth-shaped protrusions 809 on both sides are engaged with each other.

[0054] Furthermore, 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 protrusion 803 and the second protrusion 807 respectively abut 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] During 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 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 vein, 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, the entire device is first placed into the ventricle. At this time, the lower jaw assembly 4 and the upper jaw assembly 1 are close to each other. Then, the fixed 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" shape. 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 piece 702 at the rear end will change from a straight line structure to an arch structure. There is an end at the front end of the closed clamping part 701. The port 705 is connected to the clamp arm by the continuous abutment of the closing component 7, and the two closing clamping parts 701 in the closing component 7 are close to each other, which will drive the first clamping arm 801 and the second clamping arm 804 to approach each other and engage together, thereby clamping the mitral valve to close it, and after the clamping component 8 is closed, the tooth-shaped protrusion 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 clamping arm 801 and the second clamping arm 804 are connected to the top of the mitral valve, so that the mitral valve can be tightly closed during the heart contraction period, preventing 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 document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[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 be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0060] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0061] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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 set to be open, and the inner wall of the opening is slidably connected to the positioning clamp assembly (2), the end of the positioning clamp assembly (2) is provided with an outer protrusion (205), the top of the upper surface of the outer protrusion (205) is provided with a hook-shaped groove (206), the inner arc surface of the hook-shaped groove (206) is movably connected to the chain nut (3), and both ends of the outer arc surface of the chain nut (3) are rotatably connected to the lower jaw assembly (4), and one end of the lower jaw assembly (4) is provided with a torsion elastic member (6), one end of the torsion elastic member (6) is fixed to the side wall of the lower jaw assembly (4) by a bolt, and the other end of the torsion elastic member (6) is provided with two dividing bars (601), and the two dividing bars (601) are rotatably connected to the upper and lower ends of the chain 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. The positioning clamp assembly (2) is internally slidably connected to a closing assembly (7) for connecting to 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 to the top of the mitral valve to achieve closure of the mitral valve during cardiac systole. One end of the lower jaw assembly (4) is movably connected to a positioning block (9), 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 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) through a rotating shaft.

2. The closure device for mitral valve leaflet repair 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 slot (102), a damping sliding protrusion (103) is provided on one side of the upper surface of the upper jaw assembly (1), and both sides of the upper jaw assembly (1) close to the positioning slot (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 slot (102).

3. The closure device for mitral valve leaflet repair 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), a clamping groove (402) is provided on the upper surface of the convex portion (401), and the clamping groove (402) is adapted to 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. The 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 assembly (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 connected to a spring sheet (702). A bending piece (703) is fixedly connected to the side wall of a closing clamping portion (701) close to the positioning clamp assembly (2).

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

6. The 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, and a guide end (805) is provided at the top end 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).

7. The 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 clamping arm (801) and the second clamping arm (804), and tooth-shaped protrusions (809) are fixedly installed on the inner arc surfaces of the second clamping arm (804) and the first clamping arm (801), and the tooth-shaped protrusions (809) on both sides are engaged 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 protrusion (803) and the second protrusion (807) respectively abut against the arc-shaped protrusions (5) on the lower jaw assembly (4) and the positioning clamp assembly (2).

9. The closure device for repairing mitral valve leaflets according to claim 8, characterized in that: One end of the steering plate (12) is provided with a mounting hole (13), and the rotating member (14) is connected to the steering plate (12) via bolts.

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

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