Closure device for mitral valve leaflet repair

Abstract

A closure device for mitral valve leaflet repair, relating to the technical field of mitral valve leaflet repair. The closure device comprises an upper jaw assembly. One side of the upper jaw assembly is configured as an opening. A positioning forceps assembly is slidably connected to the inner wall of the opening. An end portion of the positioning forceps assembly is provided with a protruding portion. A hook-shaped slot is formed at the top of the upper surface of the protruding portion. By means of continuous abutment and approximation of a closure assembly, ports are finally connected to clamping arms, so that the closure assembly and the two clamping arms form an integrally formed structure, the closure assembly is connected to the basal portion of a mitral valve, and a first clamping arm and a second clamping arm are connected to the apical portion of the mitral valve. In this way, the mitral valve is tightly closed during systole to prevent backflow of blood from the left ventricle into the left atrium, thereby ensuring that blood can be pumped into the aorta from the left ventricle in a correct direction. Moreover, the closure assembly can implement closure without relying on external force. Compared with the prior art, the present invention eliminates the need for an external operating structure for controlling turning.

Description

A closure device for mitral valve leaflet repair Technical Field

[0001] This invention relates to the field of mitral valve leaflet repair technology, specifically a closure device for mitral valve leaflet repair. Background Technology

[0002] The primary function of the mitral valve is to ensure unidirectional blood flow within the heart. During diastole, the pressure in the left atrium is higher than that in the left ventricle, so the mitral valve opens, allowing blood to flow from the left atrium into the left ventricle. During systole, the pressure in the left ventricle increases, and 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 closing the two leaflets (anterior and posterior leaflets) of the mitral valve, preventing blood from flowing back from the left ventricle into the left atrium.

[0003] A Chinese invention patent, CN106175845A, discloses a closure device for mitral valve leaflet repair. The device includes a base, a pull rod extending through the base and movable relative to it, a hinged rod driven by the pull rod to move axially along the pull rod and rotatable relative to it, a connecting rod assembly with one end fixed to the base and the other end hinged to the hinged rod, and metal springs rotatably connected to one end of the pull rod connected to the hinged rod and symmetrically distributed about the hinged rod. Two connecting rod assemblies are symmetrically located at both ends of the base. Rotating the pull rod clamps the mitral valve leaflets at the desired clamping position via the metal springs and connecting rod assemblies. This closure device for mitral valve leaflet repair enables rapid capture of the mitral valve leaflets, reducing surgical time and risks. It also features a simple structure, low production cost, and reduced medical expenses for patients.

[0004] However, when using this device, it is necessary to provide the driving torque to control the opening and clamping action of the valve clamping instrument. Furthermore, when the valve clamping instrument is separated from the delivery assembly, all the connecting structures that transmit the relevant driving force need to be separated. The current clutch mechanism has a complicated disengagement process, and the connection is too strong, which makes separation difficult. On the other hand, easily separable structures lead to poor reliability. Therefore, we propose a closure device for mitral valve leaflet repair. Summary of the Invention

[0005] The purpose of this invention is to provide a closure device for mitral valve leaflet repair, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a closure device for mitral valve leaflet repair, comprising an upper jaw assembly, one side of which is configured as an opening, a positioning jaw assembly slidably connected to the inner wall of the opening, an external protrusion at the end of the positioning jaw assembly, a hook-shaped groove at the top of the upper surface of the external protrusion, a locking nut movably engaging the inner arc surface of the hook-shaped groove, and a lower jaw assembly rotatably connected to both ends of the outer arc surface of the locking nut, a torsional elastic element at one end of the lower jaw assembly, one end of the torsional elastic element being fixed to the side wall of the lower jaw assembly by bolts, and two partition strips at the other end of the torsional elastic element, the two partition strips being rotatably connected to the upper and lower ends of the locking nut respectively, wherein in a natural state, the torsional elastic element brings the positioning jaw assembly and the lower jaw assembly closer to each other;

[0007] The positioning clamp assembly has a slidably connected closure component for connecting to the bottom of the mitral valve, and a clamping component is provided between the positioning clamp assembly and the lower jaw assembly for connecting to the top of the mitral valve, so as to realize the closure of the mitral valve during cardiac systole.

[0008] One end of the lower jaw assembly is movably engaged with a positioning block. A locking end is provided on one side of the positioning block. The positioning block engages with the lower jaw assembly through the locking end. A fixing rod is installed inside the positioning block. A micro-conduit is connected to the fixing rod. The other end of the micro-conduit is connected to a closing assembly. A boss is installed on one side of the fixing rod. A steering plate is inserted inside the boss. A rotating component is detachably installed on the outside of the steering plate. Both sides of the rotating component are rotatably connected to the upper and lower surfaces of the positioning block through a rotating shaft.

[0009] Furthermore, the upper jaw assembly has a notch at its front end and a positioning groove in its middle. The upper surface of the upper jaw assembly has a damping sliding protrusion on one side, and guide sides are provided on both sides of the upper jaw assembly near the positioning groove. The surfaces of the guide sides 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-fit ​​groove is provided on the upper surface of the convex portion. The snap-fit ​​groove is adapted to the interlocking nut. One side of the lower jaw assembly is a hollow through structure, and arc-shaped protrusions are installed on the bottom of the inner sidewalls of both the positioning jaw assembly and the lower jaw assembly.

[0011] Furthermore, a closing clamping part is provided at the front end of one side surface of the closing component, and the inner arc surface of the closing clamping part is provided with teeth. There are two closing clamping parts, and the top of each of the two closing clamping parts is connected to a spring plate. A bent part is fixedly connected to the side wall of one of the closing clamping parts near the positioning clamping component.

[0012] Furthermore, the bent component passes through the positioning groove of the upper jaw assembly, and a drive slide plate is movably connected to one end of the bent component extending to the outside of the upper jaw assembly. The drive slide plate has an arc-shaped surface inside, and one side of the drive slide plate is slidably engaged with the positioning groove. Ports are opened at both sides of the two closed clamping parts.

[0013] Furthermore, the clamping assembly includes a first clamping arm that abuts against one of the closed clamping portions, the top end of the first clamping arm is provided with a hook, 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] On the other side, a second clamping arm is tightly connected to the port of the closed clamping part. The top of the outer arc surface of the second clamping arm is provided with a guide end. The guide end is movably engaged with the hook. A second groove is provided on the outer arc surface of the second clamping arm near the guide end. A second protrusion is provided in the middle of the inner arc surface of the second groove.

[0015] Furthermore, a deformable through hole is provided at the connection between the first clamping arm and the second clamping arm, and toothed protrusions are fixedly installed on the inner arc surfaces of the second clamping arm and the first clamping arm, with the toothed protrusions on both sides meshing 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 portions, 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, one end of the steering plate is provided with a mounting hole, and the rotating component is connected to the steering plate by bolts.

[0018] Furthermore, one end of the microcatheter is fixedly mounted on the drive slide plate by a pin, and the other end passes through the positioning block and is connected to the fixing rod.

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

[0020] 1. In this invention, when the drive slide moves, the drive slide moves the bending component, which in turn moves the two closed clamping parts along the positioning clamp assembly. Since the positioning clamp assembly and the lower jaw assembly are close to each other, they always maintain an inverted "V" shape. When the two closed clamping parts slide along the positioning clamp assembly, they are pressed by the jaws formed by the positioning clamp assembly and the lower jaw assembly, causing them to move closer to each other. This causes the spring plate at the rear end to change from a straight structure to an arched structure. In actual use, the jaws are placed in the middle of the mitral valve beforehand. Then, the drive slide is pushed to push the closing assembly to the bottom of the mitral valve and attach it to the surface of the mitral valve. This allows the mitral valve to close under the action of the two closed clamping parts, eliminating the need for external force to close the two closed clamping parts. Compared with the prior art, this saves the external operating structure used for controlling turning.

[0021] 2. This invention can drive the microcatheter to move by rotating the fixing rod, thereby causing the microcatheter to push the sliding plate to move. This allows the jaws at the front end 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, reduce the possibility of postoperative valve function deterioration, and thus reduce the risk and economic burden of patients needing to undergo surgery again.

[0022] 3. This invention utilizes the continuous contact and approach of the closing component to ultimately connect the port to the clamping arm, thereby forming an integral structure between the closing component and the two clamping arms. This allows the closing component to connect to the bottom of the mitral valve, and the first and second clamping arms to connect to the top of the mitral valve. Therefore, during cardiac systole, the mitral valve closes tightly, preventing blood from the left ventricle from flowing back into the left atrium. This ensures that blood can be pumped from the left ventricle into the aorta in the correct direction, and then delivered to all tissues and organs of the body, reducing pressure in the left atrium and pulmonary veins, alleviating pulmonary congestion symptoms, and improving respiration.

[0023] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

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

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

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

[0027] Figure 4 is a top sectional view 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 is a three-dimensional schematic diagram of the clamping component structure of the present invention;

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

[0031] Figure 8 is a top sectional view of the clamping component structure of the present invention;

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

[0033] Figure 10 is a structural schematic diagram of the closing component and the positioning clamp component of the present invention.

[0034] Reference numerals: 1. Upper jaw assembly; 101. Notch; 102. Positioning groove; 103. Damping sliding protrusion; 104. Guide side; 2. Positioning jaw assembly; 205. Outer protrusion; 206. Hook-shaped groove; 3. Interlocking nut; 4. Lower jaw assembly; 401. Convex part; 402. Snap-fit ​​groove; 5. Arc-shaped protrusion; 6. Torque elastic element; 601. Separator strip; 7. Closing assembly; 701. Closing clamping part; 702. Spring plate; 703. Bending element; 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, Deformed through hole; 809, Toothed protrusion; 8010, First groove; 9, Positioning block; 901, Snap-fit ​​end; 10, Fixing rod; 11, Boss; 12, Steering plate; 13, Mounting hole; 14, Rotating component; 15, Microcatheter. Detailed Implementation

[0035] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0036] Please refer to Figures 1-10. The present invention provides a technical solution: a closure device for mitral valve leaflet repair, including an upper jaw assembly 1. One side of the upper jaw assembly 1 is configured as an opening. A positioning jaw assembly 2 is slidably connected to the inner wall of the opening. The end of the positioning jaw assembly 2 is provided with an external protrusion 205. A hook-shaped groove 206 is opened on the top of the upper surface of the external protrusion 205. A locking nut 3 is movably engaged 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 a lower jaw assembly 4. A torsional elastic element 6 is provided at one end of the lower jaw assembly 4. One end of the torsional elastic element 6 is fixed to the side wall of the lower jaw assembly 4 by bolts. Two partition strips 601 are provided at the other end of the torsional elastic element 6. The two partition strips 601 are rotatably connected to the upper and lower ends of the locking nut 3 respectively. In the natural state, the torsional elastic element 6 brings the positioning jaw assembly 2 and the lower jaw assembly 4 closer to each other.

[0037] The positioning clamp assembly 2 has a slidable closure assembly 7 inside 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, so as to realize the closure of the mitral valve during cardiac systole.

[0038] One end of the lower jaw assembly 4 is movably engaged with a positioning block 9. A locking end 901 is provided on one side of the positioning block 9. The positioning block 9 engages with the lower jaw assembly 4 through the locking end 901. A fixing rod 10 is installed inside the positioning block 9. A micro-conduit 15 is connected to the fixing rod 10. The other end of the micro-conduit 15 is connected to the closing assembly 7. A boss 11 is installed on one side of the fixing rod 10. A steering piece 12 is inserted into the boss 11. A rotating part 14 is detachably installed on the outside of the steering piece 12. 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.

[0039] Regarding the technical solution of this embodiment, 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. 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 near the positioning groove 102. The surfaces of the guide secondary edges 104 are distributed on both sides of the positioning groove 102.

[0040] It should be noted that the notch 101 on one side of the upper jaw assembly 1 is to reserve a space and the direction of the notch 101 serves as the front end. At the same time, the positioning groove 102 opened on the surface of the upper jaw assembly 1 allows the installed component to slide inside the upper jaw assembly 1. The upper jaw assembly 1 has a "C" shaped structure, which can limit and guide the positioning jaw assembly 2. The positioning jaw assembly 2 is offset based on the installation angle of the upper jaw assembly 1. Therefore, the outer protrusion 205 of the positioning jaw assembly 2 protrudes from one end of the upper jaw assembly 1. The purpose of the outward extension of the outer protrusion 205 is to connect with the lower jaw assembly 4. The connection is made by the hook-shaped groove 206 on the outer protrusion 205 corresponding to the snap-fit ​​groove 402 on the lower jaw assembly 4. Then, the two grooves are connected in series by the interlocking nut 3, so that the positioning jaw assembly 2 and the lower jaw assembly 4 can rotate around the interlocking nut 3.

[0041] Meanwhile, the separator 601 in the torque elastic element 6 is elastic. Under the control of the torque of the torque elastic element 6, the positioning clamp assembly 2 and the lower jaw assembly 4 always remain close to each other without external force. However, due to the limited elasticity of the torque elastic element 6 itself, the positioning clamp and the lower jaw are not completely closed when no external force is applied. Therefore, further control of the positioning clamp assembly 2 is required. Since the hook-shaped groove 206 at the top of the positioning clamp assembly 2 is connected to the torque elastic element 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 interlocking nut 3, thereby causing the lower jaw assembly 4 mounted on the interlocking nut 3 to move closer and close.

[0042] The function of the torsion elastic element 6 is to bring the lower jaw assembly 4 as close as possible to the positioning jaw assembly 2 in the initial state. Also, the smaller the volume of contraction before entering the heart, the less blood flow resistance it will encounter, thus allowing it to enter more smoothly.

[0043] Therefore, the overall volume of the jaws is in a contracted state before entering the mitral valve of the heart, and expands after entering. Furthermore, the friction between the outer surfaces of the upper jaw assembly 1 and the lower jaw assembly 4 is small, so it will not cause damage to human tissues after entering and will not cause medical accidents.

[0044] Regarding the technical solution of this embodiment, a convex part 401 is provided at the top of one side surface of the lower jaw assembly 4, and a snap-fit ​​groove 402 is provided on the upper surface of the convex part 401. The snap-fit ​​groove 402 is adapted to the interlocking nut 3. One side of the lower jaw assembly 4 is a hollow through structure, and arc-shaped protrusions 5 are installed on the bottom of the inner sidewalls of both the positioning jaw assembly 2 and the lower jaw assembly 4. The arc-shaped protrusions 5 are mainly used to limit the clamping assembly 8.

[0045] Regarding the technical solution of this embodiment, a closing clamping part 701 is provided at the front end of one side surface of the closing component 7. The inner arc surface of the closing clamping part 701 is provided with teeth. There are two closing clamping parts 701. The top ends of the two closing clamping parts 701 are connected to spring plates 702. A bent end 703 is fixedly connected to the side wall of one of the closing clamping parts 701 near the positioning clamp component 2.

[0046] Further, as shown in Figure 4, the bent component 703 is disposed through the positioning groove 102 of the upper jaw assembly 1, and the end of the bent component 703 extending to the outside of the upper jaw assembly 1 is movably connected to the drive slide plate 704. Since the upper and lower connecting ends of the drive slide plate 704 are provided with arc-shaped surfaces, when the bent component 703 is connected inside it, regardless of whether the drive slide plate 704 moves upward or downward, due to the action of the opposite force, the bent component 703 will always be tightly fitted to the top or bottom of the limiting surface, thereby realizing the upward or downward movement of the bent component 703. One side of the drive slide plate 704 is slidably engaged with the positioning groove 102. Ports 705 are provided on both sides of the two closed clamping parts 701. The ports 705 are reserved structures for connecting the clamping assembly 8. The set guide side 104 facilitates the guidance of the drive slide plate 704. When the drive slide plate 704 moves, the drive slide plate 704 will The bending component 703 moves, causing the two closed clamping parts 701 to slide along the positioning clamp assembly 2. Since the positioning clamp assembly 2 and the lower jaw assembly 4 are close to each other, they always maintain an inverted "V" shape. When the two closed clamping parts 701 slide along the positioning clamp assembly 2, they are pressed by the jaws formed by the positioning clamp assembly 2 and the lower jaw assembly 4, causing them to move closer to each other. This causes the spring plate 702 at the rear end to change from a straight structure to an arched structure. In actual use, the jaws are placed in the middle of the mitral valve beforehand. Then, the drive slide plate 704 is pushed to push the closing assembly 7 to the bottom of the mitral valve and attach it to the surface of the mitral valve. This allows the mitral valve to close under the action of the two closed clamping parts 701, eliminating the need for external force to close the two closed clamping parts 701. Compared with the prior art, this saves the external operating structure used to control turning.

[0047] Regarding the technical solution of this embodiment, one end of the steering plate 12 is provided with a mounting hole 13. The rotating part 14 is connected to the steering plate 12 by bolts. The rotating part 14 rivets the positioning connector, the fixing rod 10, and the steering plate 12 together. The steering plate 12 rotates freely about the rotating part 14. The fixing rod 10 is connected through the positioning connector 9 inserted into the steering plate 12. The fixing rod 10 will rotate freely about the rotating part 14.

[0048] Regarding the technical solution of this embodiment, one end of the microcatheter 15 is fixedly mounted on the drive slide plate 704 by a pin, 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 moved, thereby causing the microcatheter 15 to push the drive slide plate 704 to move. This allows the jaws at the front end 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, reduce the possibility of postoperative valve function deterioration, and thus reduce the risk and economic burden of patients needing to undergo surgery again.

[0049] The microcatheter 15 is a plastic tube of a certain length, tapering at the front end to facilitate insertion into blood vessels, while the deeper rear end 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 though the rear end of the microcatheter 15 is made of a soft material, the softness is prepared to allow the rotating fixing rod 10 to push the microcatheter 15 against the drive slide plate 704.

[0050] Regarding 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. The top end of the first clamping arm 801 is provided with a hook 802. 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.

[0051] On the other side, a second clamping arm 804 is tightly connected to the port 705 of the closed clamping part 701. The top of the outer arc surface of the second clamping arm 804 is provided with a guide end 805. 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. A second protrusion 807 is provided in the middle of the inner arc surface of the second groove 806.

[0052] Furthermore, a deformable through hole 808 is provided at the connection between the first clamping arm 801 and the second clamping arm 804, and toothed protrusions 809 are fixedly installed on the inner arc surfaces of the second clamping arm 804 and the first clamping arm 801, and the toothed protrusions 809 on both sides mesh with each other.

[0053] 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.

[0054] Both the first clamping arm 801 and the second clamping arm 804 are preferably designed in an arc shape. The guide end 805 has a V-shaped groove structure. The guide end 805 can stably guide the hook-shaped hook 802 and ensure that the clamping assembly 8 is stably closed. In addition, the inner sidewalls of the first clamping arm 801 and the second clamping arm 804 are provided with staggered toothed protrusions 809. After the first clamping arm 801 and the second clamping arm 804 are closed, the toothed protrusions 809 come into contact with the clamped tissue. The staggered toothed protrusions 809 can not only play an anti-slip role, but also prevent mitral valve necrosis while ensuring mitral valve closure. The deformable through hole 808 is preferably arc-shaped or annular, which can maintain the elasticity between the first clamping arm 801 and the second clamping arm 804, facilitate the elastic deformation at the connection of the two clamping arms, and make the two clamping arms fit more tightly after closing.

[0055] In use, the first protrusion on the first clamping arm 801 is positioned and engaged with the arc-shaped protrusion 5 on one side of the lower jaw assembly 4, and the second protrusion 807 on the second clamping arm 804 is positioned and engaged 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 clamping arms. By continuously abutting and approaching the closing assembly 7, the port 705 is finally connected to the clamping arm, thus forming an integral structure between the closing assembly 7 and the two clamping arms. This allows the closing assembly 7 to connect to the bottom of the mitral valve, and the first clamping arm 801 and the second clamping arm 804 to connect to the top of the mitral valve. Therefore, during cardiac systole, the mitral valve closes tightly, preventing blood from the left ventricle from flowing back into the left atrium, thus ensuring that blood can be pumped from the left ventricle into the aorta in the correct direction, and then delivered to all tissues and organs of the body, reducing the pressure in the left atrium and pulmonary veins, alleviating pulmonary congestion symptoms, and improving breathing.

[0056] The operating principle and process of this invention are as follows: When needed, the entire device is first placed in the ventricle. At this time, the lower clamp assembly 4 and the upper clamp assembly 1 are close to each other. Then, the fixed rod 10 is rotated to drive the steering plate 12 and the rotating part 14 to move. This allows the front clamp to enter the mitral valve and adjust its angle, and also drives the microcatheter 15 to push the drive slide plate 704. This causes the drive slide plate 704 to move and push the bending part 703 to move. Thus, the bending part 703 drives the entire closure assembly 7 to move downward along the positioning clamp assembly 2. Since the positioning clamp assembly 2 and the lower clamp assembly 4 are close to each other, they always maintain an inverted "V" shape. When the two closure clamping parts 701 slide along the positioning clamp assembly 2, the two closure clamping parts 701 will be pressured by the clamps formed by the positioning clamp assembly 2 and the lower clamp assembly 4, causing them to move closer to each other. In this way, the spring plate 702 at the rear end will change from a straight structure to an arched structure. An end is provided at the front end of the closure clamping part 701. Port 705 is connected to the clamping arm by the continuous contact and approach of the closing component 7. After the two closing clamping parts 701 in the closing component 7 approach each other, they will drive the first clamping arm 801 and the second clamping arm 804 to approach each other and lock together, thereby clamping and closing the mitral valve. After the clamping component 8 is closed, the toothed protrusions 809 will also contact the clamped tissue. The staggered toothed protrusions 809 not only play an anti-slip role, but also prevent mitral valve necrosis while ensuring mitral valve closure. In this way, the closing component 7 connects to the bottom of the mitral valve, and the first clamping arm 801 and the second clamping arm 804 connect to the top of the mitral valve. During cardiac systole, the mitral valve can be tightly closed, preventing blood from the left ventricle from flowing back to the left atrium. This ensures that blood can be pumped from the left ventricle into the aorta in the correct direction, and then delivered to all tissues and organs of the body, reducing the pressure in the left atrium and pulmonary veins and alleviating pulmonary congestion symptoms.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. When an element is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another element, it may be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0060] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples.

Claims

1. A closure device for mitral valve leaflet repair, comprising an upper jaw assembly (1), characterized in that, One side of the upper jaw assembly (1) is set as an opening, and the inner wall of the opening is slidably connected to the positioning jaw assembly (2). The end of the positioning jaw assembly (2) is provided with an external protrusion (205). The top of the upper surface of the external protrusion (205) is provided with a hook-shaped groove (206). The inner arc surface of the hook-shaped groove (206) is movably engaged with a locking nut (3). Both ends of the outer arc surface of the locking nut (3) are rotatably connected to the lower jaw assembly (4). One end of the lower jaw assembly (4) is provided with a torsion elastic element (6). One end of the torsion elastic element (6) is fixed to the side wall of the lower jaw assembly (4) by bolts. The other end of the torsion elastic element (6) is provided with two partition strips (601). The two partition strips (601) are rotatably connected to the upper and lower ends of the locking nut (3) respectively. In the natural state, the torsion elastic element (6) makes the positioning jaw assembly (2) and the lower jaw assembly (4) approach each other. The positioning clamp assembly (2) has a slidably connected 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 clamp assembly (4) for connecting to the top of the mitral valve, so as to realize the closure of the mitral valve during cardiac systole. One end of the lower jaw assembly (4) is movably engaged with a positioning block (9). A locking end (901) is provided on one side of the positioning block (9). The positioning block (9) engages with the lower jaw assembly (4) through the locking end (901). A fixing rod (10) is installed inside the positioning block (9). 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). A steering piece (12) is inserted inside the boss (11). A rotating part (14) is detachably installed on the outside of the steering piece (12). 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.

2. The closure device for mitral valve leaflet repair according to claim 1, characterized in that: The upper jaw assembly (1) has a notch (101) at its front end and a positioning groove (102) in the middle. 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) near the positioning groove (102). The surfaces of the guide secondary edges (104) are distributed on both sides of the positioning groove (102).

3. A closure device for mitral valve leaflet repair according to claim 2, characterized in that: The lower jaw assembly (4) has a convex part (401) at the top of one side surface, and a snap-fit ​​groove (402) on the upper surface of the convex part (401). The snap-fit ​​groove (402) is adapted to the interlocking nut (3). One side of the lower jaw assembly (4) is a hollow through structure, and arc-shaped protrusions (5) are installed on the bottom of the inner sidewalls of both the positioning jaw assembly (2) and the lower jaw assembly (4).

4. A closure device for mitral valve leaflet repair according to claim 2, characterized in that: The closing assembly (7) has a closing clamping part (701) at the front end of one side surface. The inner arc surface of the closing clamping part (701) is provided with teeth. There are two closing clamping parts (701). The top of each of the two closing clamping parts (701) is connected to a spring plate (702). A bent piece (703) is fixedly connected to the side wall of one of the closing clamping parts (701) near the positioning clamp assembly (2).

5. A closure device for mitral valve leaflet repair according to claim 4, characterized in that: The bending member (703) is provided through the positioning groove (102) of the upper jaw assembly (1), and the end of the bending member (703) extending to the outside of the upper jaw assembly (1) is movably connected to the drive slide plate (704). The drive slide plate (704) has an arc-shaped surface inside, and one side of the drive slide plate (704) is slidably engaged with the positioning groove (102). Ports (705) are provided at both sides of the two closed clamping parts (701).

6. A closure device for mitral valve leaflet repair according to claim 5, characterized in that: The clamping assembly (8) includes a first clamping arm (801) abutting against one of the closed clamping portions (701), the top end of the first clamping arm (801) is provided with a hook (802), the outer arc surface of the first clamping arm (801) is provided with a first groove (8010), and the inner arc surface of the first groove (8010) is provided with a first protrusion (803). On the other side, a second clamping arm (804) is tightly connected to the port (705) of the closed clamping part (701). The top of the outer arc surface of the second clamping arm (804) is provided with a guide end (805). 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). A second protrusion (807) is provided in the middle of the inner arc surface of the second groove (806).

7. A closure device for mitral valve leaflet repair according to claim 6, characterized in that: A deformable through hole (808) is provided at the connection between the first clamping arm (801) and the second clamping arm (804). Toothed protrusions (809) are fixedly installed on the inner arc surfaces of the second clamping arm (804) and the first clamping arm (801), and the toothed protrusions (809) on both sides mesh with each other.

8. A closure device for mitral valve leaflet repair 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). The inner arc surfaces of the first protrusion (803) and the second protrusion (807) abut against the arc-shaped protrusions (5) on the lower jaw assembly (4) and the positioning clamp assembly (2), respectively.

9. A closure device for mitral valve leaflet repair according to claim 8, characterized in that: The steering plate (12) has a mounting hole (13) at one end, and the rotating part (14) is connected to the steering plate (12) by bolts.

10. A closure device for mitral valve leaflet repair according to claim 9, characterized in that: One end of the microcatheter (15) is fixedly mounted on the drive slide plate (704) by a pin, and the other end passes through the positioning block (9) and is connected to the fixing rod (10).

Images