A valve repair device, a valve repair system, and its working method

Abstract

This invention provides a valve repair device, a valve repair system, and its operating method. The valve repair device includes a stop structure, a drive rod, and a clamping and supporting structure. The proximal end of the clamping and supporting structure is rotatably connected to the stop structure, and the distal end is rotatably connected to the drive rod. The stop structure includes a drive slider and a locking member disposed within the drive slider, with the locking member elastically clamping the drive rod on the outside. When no external force is applied, the locking member elastically clamps the drive rod radially to achieve a locked state of the clamping and supporting structure. When a radial outward pulling force is applied to the locking member, there is no radial force between the locking member and the drive rod, simplifying the locking structure of this invention and enabling the clamping and supporting structure to be released. This allows the valve repair device to lock at any time during the clamping of the valve leaflet, while also facilitating the release of related tissues and simplifying the operation for doctors.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a heart valve repair device, valve repair system and its working method, which achieves valve repair through minimally invasive intervention. Background Technology

[0002] Heart valves (aortic, pulmonary, tricuspid, and mitral valves) play a crucial role in ensuring adequate forward blood flow through the cardiovascular system. These valves can be damaged due to congenital malformations, inflammatory processes, infections, diseases, etc., leading to reduced valve effectiveness. This damage can result in serious cardiovascular injury or death. Damaged heart valves can be repaired or replaced through open-heart surgery. However, open-heart surgery is highly invasive and can cause complications. Transcatheter vascular techniques allow for the introduction and implantation of prosthetic devices in a much less invasive manner than open-heart surgery. Valve repair devices are primarily used in transcatheter vascular techniques, which achieve edge-to-edge valve repair via a catheter, resulting in less trauma and faster recovery compared to traditional surgery.

[0003] Current edge-to-edge interventional repair devices are structurally complex or have functional defects. When operating the valve repair device, it is easy for the valve repair device to become entangled or stuck in related tissues (such as chordae tendineae), and the locking mechanism is complex. Alternatively, the valve repair system can easily release related tissues, but it can only achieve locking in specific locations. Summary of the Invention

[0004] The purpose of this invention is to provide a valve repair device, a valve repair system, and a method for operating the same. The locking structure is simple, allowing the valve repair device to lock at any time during the clamping of the valve leaflets. At the same time, the valve repair system facilitates the release of related tissues, making it convenient for doctors to operate.

[0005] To address the aforementioned problems, this invention provides a valve repair device, comprising a stop structure, a drive rod, and a clamping and lifting structure. The drive rod is axially movable and passes through the stop structure, with its proximal end detachably connected to the distal end of the separation rod of the delivery catheter. The proximal end of the clamping and lifting structure is rotatably connected to the stop structure, and its distal end is rotatably connected to the drive rod. The stop structure includes a drive slider and a locking member disposed within the drive slider, with the locking member elastically gripping the outside of the drive rod.

[0006] When no external force is applied, the locking member elastically locks the drive rod radially to achieve the locking state of the clamping and lifting structure; when a radial outward pulling force is applied to the locking member, there is no radial force between the locking member and the drive rod, thereby achieving the release state of the clamping and lifting structure.

[0007] Optionally, the proximal end of the drive slider includes a proximal end portion, which is tubular and has an opening on its proximal end wall. The opening is fixedly connected to the distal end of the separation tube of the delivery conduit. The proximal end portion has an internal space, and the drive rod is axially movable through the internal space.

[0008] Furthermore, the distal end of the driving slider includes a distal end portion, which includes a first sidewall and a second sidewall facing each other, and two first baffles and a second baffle disposed between the first sidewall and the second sidewall. The second baffle is disposed at the distal end of the first sidewall and the second sidewall and connects the first sidewall and the second sidewall. Each first baffle is disposed on the proximal end wall of a first sidewall, and the two first baffles are disposed on the same plane, such that the first sidewall, the second sidewall, and the two first baffles form a first cavity, and the first sidewall, the second sidewall, the two first baffles, and the second baffle form a second cavity.

[0009] Furthermore, the internal space, the first cavity, and the second cavity are connected in sequence, and a first through hole is provided on the second baffle. The first through hole is coaxially arranged with the internal space, and the central axis of the first through hole overlaps with the center line of the gap between the two first baffles.

[0010] Optionally, the locking element is made of an elastic material.

[0011] Optionally, the locking member includes a limiting member, a supporting member, and a clamping member. The limiting member is connected to the proximal end of the supporting member, and the proximal end of the clamping member is connected to the proximal end of the supporting member. The clamping member has an angle with the axis, and the inner diameter of the clamping member gradually decreases from the proximal end to the distal end, and is the smallest at the distal end of the clamping member.

[0012] Furthermore, the limiting component is disposed in the first cavity, and the limiting component has a second through hole, the second through hole being coaxially disposed with the first through hole, the supporting component and the clamping component are disposed in the second cavity, and the limiting component is located at the proximal end of the supporting component.

[0013] Furthermore, the supporting component includes two supporting rods, which are respectively connected to the two sides of the limiting component that are directly opposite each other. The two supporting rods are disposed in the gap between the two first baffles and in the second cavity.

[0014] Furthermore, the clamping component includes two ridges, which are symmetrically arranged on the inner sides of the two support rods, and each ridge is connected to the proximal end of one of the support rods;

[0015] During the conveying process, the drive rod and the separation rod are sequentially inserted from the near end to the far end into the internal space, the first through hole, the gap between the two first baffles, the space between the two edges, and the second through hole.

[0016] Furthermore, the two edges have the largest distance at the proximal end and the smallest distance at the distal end, and the minimum distance is less than the outer diameter of the separating rod and the driving rod, so that when no external force is applied, the locking member elastically locks the driving rod radially to achieve the locking state of the driving rod and the separating rod, thereby achieving the locking state of the clamping and lifting structure.

[0017] Furthermore, each of the support rods has a third through hole at its distal end. During the conveying process, the third through hole connects to the distal end of the pull wire. When the pull wire provides radial outward tension to the support rod, the two support rods and the two edges undergo elastic deformation and drive the two edges to move radially outward to increase the minimum distance, thereby realizing the axial movement state of the drive rod and thus realizing the release state of the clamping and lifting structure.

[0018] On the other hand, the present invention also provides a valve repair system, including the valve repair device and a delivery device. The delivery device includes a delivery catheter, which includes a separating rod and a separating tube. The distal end of the separating tube is detachably connected to the proximal end of a driving rod. The distal end of the separating rod is fixed in an opening. The separating rod and the driving rod are axially movable through a stop structure. A locking member elastically holds the outside of the driving rod and is used to switch the locking and releasing states of the separating rod and the driving rod.

[0019] Furthermore, the present invention also provides a method for operating a valve repair system, comprising the aforementioned valve repair system, including the following steps:

[0020] The distal end of the separation rod is detachably connected to the proximal end of the drive rod, and the distal end of the separation tube is placed in the opening to complete the installation of the valve repair device.

[0021] Apply radial outward tension to the two support rods respectively until the minimum distance between the two edges is greater than the outer diameter of the drive rod and the separation rod, so that the clamping and lifting structure is in the released state;

[0022] When the external pulling force is withdrawn, the two support rods cause the two edges to retract radially, thereby locking the drive rod or separation rod radially, and thus locking the clamping and lifting structure in a locked state; and

[0023] Separate the distal end of the separating rod from the proximal end of the driving rod, detach the distal end of the separating tube from the opening, and retract the separating tube and the separating rod to complete the release of the valve repair device.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] This invention provides a valve repair device, a valve repair system, and a method for operating the same. The valve repair device includes a stop structure, a drive rod, and a clamping and supporting structure. The drive rod is axially movable and passes through the stop structure, with its proximal end detachably connected to the distal end of the separation rod of the delivery catheter. The proximal end of the clamping and supporting structure is rotatably connected to the stop structure, and its distal end is rotatably connected to the drive rod. The stop structure includes a drive slider and a locking member disposed within the drive slider, with the locking member elastically gripping the outside of the drive rod. When no external force is applied, the locking member elastically clamps the drive rod radially, achieving a locked state for the clamping and supporting structure. When a radial outward pulling force is applied to the locking member, there is no radial force between the locking member and the drive rod, simplifying the locking structure and enabling the release state of the clamping and supporting structure. This allows the valve repair device to lock at any time during valve leaflet clamping, while also facilitating the release of related tissues and simplifying physician operation. Attached Figure Description

[0026] Figure 1a This is a schematic diagram of a valve repair system provided in an embodiment of the present invention;

[0027] Figure 1b for Figure 1a Enlarged view of region A in the middle;

[0028] Figure 2a A schematic diagram of the connection structure between the distal end of the delivery catheter and the valve repair device provided in an embodiment of the present invention;

[0029] Figures 2b-2c This is a partial cross-sectional schematic diagram of a valve repair device according to an embodiment of the present invention;

[0030] Figures 3a-3b This is a schematic diagram of the structure of a drive slider according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of a locking component according to an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Valve repair device; 11-Drive rod; 12-Stop structure; 121-Drive slider; 1211-Opening; 1212-Internal space; 1213-First sidewall; 1214-Second sidewall; 1215, 1216-First baffle; 1217-Second baffle; 1218-First through hole; 1219-Fourth through hole; 122-Locking component; 1221-Limiting component; 1222-Second through hole; 1223, 1224-Support rod; 1225, 1226-Edge; 1227-Third through hole; 13-Clamping and lifting structure; 141-First cavity; 142-Second cavity;

[0034] 2-Catheter assembly; 21-Delivery catheter; 211-Dissociation tube; 212-Dissociation rod; 22-Inner sheath catheter; 23-Outer sheath catheter; 3-Delivery handle; 31-First handle; 32-Second handle; 33-Third handle;

[0035] 4- Primary leaflets. Detailed Implementation

[0036] The following will provide a more detailed description of a valve repair device, valve repair system, and its working method according to the present invention. The invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0037] For clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not detailed in detail, as they would obscure the invention with unnecessary detail. It should be understood that in the development of any actual embodiment, numerous implementation details must be made to achieve the developer's specific objectives, such as changes from one embodiment to another according to limitations related to the system or business. Furthermore, it should be understood that such development work may be complex and time-consuming, but is merely routine work for those skilled in the art.

[0038] To make the objectives and features of the present invention more apparent and understandable, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clearly illustrate the objectives of the embodiments of the present invention. In this document, the term "or" is generally used to include the meaning of "and / or" unless otherwise expressly stated. The terms "inner," "outer," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments. In this document, the terms "distal" and "proximal" refer to the relative orientation, position, or direction of elements or actions relative to each other from the perspective of a physician using the medical device. Although "distal" and "proximal" are not restrictive, "proximal" generally refers to the end of the medical device closer to the operator during normal operation, and "distal" generally refers to the end closer to the patient's heart.

[0039] Figure 1a This is a schematic diagram of the structure of a valve repair system provided in this embodiment. Figure 1b for Figure 1a An enlarged view of region A in the diagram. (See diagram below.) Figures 1a-1b As shown, this embodiment provides a valve repair system, including a delivery device and a valve repair device 1, wherein the valve repair device 1 is detachably connected to the distal end of the delivery device.

[0040] The delivery device includes a delivery handle 3 and a catheter assembly 2. The catheter assembly 2 includes an outer sheath catheter 23, an inner sheath catheter 22 and a delivery catheter 21, which are sequentially connected from the outside to the inside. The distal end of the inner sheath catheter 22 extends beyond the distal end of the outer sheath catheter 23, and the distal end of the delivery catheter 21 extends beyond the distal end of the inner sheath catheter 22.

[0041] The delivery handle 3 includes a first handle 31, a second handle 32, and a third handle 33 arranged sequentially from proximal to distal. The first handle 31 is connected to the proximal end of the delivery catheter 21 and is used to control the valve repair device 1 to perform loading, delivery, and release functions during delivery. The second handle 32 is connected to the proximal end of the inner sheath catheter 22 and is used to control the bending of the distal end of the inner sheath catheter 22 to establish a minimally invasive interventional channel during delivery. The third handle 33...

[0042] The handle 33 is connected to the proximal end of the outer sheath catheter 23 and is used to control the bending of the outer sheath catheter 23 to establish a minimally invasive interventional channel to the inner sheath catheter 22, the delivery catheter 21 and the valve repair device 1 during delivery.

[0043] Figure 2a This is a schematic diagram of the connection structure between the distal end of the delivery catheter and the valve repair device provided in this embodiment. Figures 2b-2cThis is a partial cross-sectional schematic diagram of the valve repair device in this embodiment. Figures 2a-2c As shown, the delivery catheter 21 includes a separation tube 211 and a separation rod 212 sleeved from the outside in. The first handle 31 drives the separation tube 211 and the separation rod 212 to move axially, and the separation rod 212 can move axially within the separation tube 211. The delivery device is detachably connected to the valve repair device 1 via the separation rod 212 and the separation tube 211.

[0044] The distal end of the separating tube 211 has at least two elastic connecting components. All the elastic connecting components are spaced apart circumferentially along the separating tube 211. Preferably, all the elastic connecting components are evenly arranged circumferentially along the separating tube 211. The elastic connecting components are generally T-shaped. The distance of each elastic connecting component from the axis is less than half the outer diameter of the separating rod 212, and the elastic connecting components are made of elastic material.

[0045] The valve repair device 1 includes a drive rod 11, a stop structure 12, and a clamping and lifting structure 13. The drive rod 11 is axially movable and passes through the stop structure 12. The clamping and lifting structure 13 is used to lift and clamp the valve. The clamping and lifting structure 13 is rotatably connected to the stop structure 12 at its proximal end and rotatably connected to the drive rod 11 at its distal end. This allows the clamping and lifting structure 13 to rotate at both its connection points with the stop structure 12 and with the drive rod 11 when the drive rod 11 moves axially within the stop structure 12, thereby changing the shape of the clamping and lifting structure 13 to lift and clamp the valve. The stop structure 12 is used to switch the release and locking states of the clamping and lifting structure 13 by switching the axial movement and locking states of the drive rod 11 and the separation rod 212. The proximal end of the drive rod 11 is detachably connected to the distal end of the separation rod 212. Preferably, the outer diameter of the drive rod 11 is the same as the outer diameter of the separating rod 212, so that the separating rod 212 and the drive rod 11 can easily move axially within the stop structure 12.

[0046] Please continue reading. Figures 2b-2c The stop structure 12 includes a drive slider 121 and a locking member 122 disposed within the drive slider 121. The drive rod 11 passes through the drive slider 121 and the locking member 122, such that during the conveying process, the separating rod 212 drives the drive rod 11 to move axially within the drive slider 121, and the locking member 122 switches between the axial movement state and the locking state of the separating rod 212 and the drive rod 11.

[0047] Figures 3a-3bThis is a schematic diagram of the drive slider in this embodiment. Figures 3a-3b As shown, the drive slider 121 includes a proximal end and a distal end along the axial direction from the proximal end to the distal end. The proximal end is generally tubular and has an axially penetrating internal space 1212. The separating rod 212 and the drive rod 11 can move axially within the internal space 1212. An axial opening 1211 is formed on the proximal end sidewall of the proximal end. The opening 1211 is matched with the elastic connection assembly. The structure of the opening 1211 is also generally T-shaped, so that when the valve repair device 1 and the delivery device are connected, the distal end of the separating rod 212 can be detachably connected to the proximal end of the drive rod 11. At this time, the elastic connection assembly is subjected to radial elastic support force, and the elastic connection assembly is fixed in the opening 1211.

[0048] The distal end includes a first sidewall 1213 and a second sidewall 1214 arranged opposite each other. The proximal ends of the first sidewall 1213 and the second sidewall 1214 are both connected to the distal end of the proximal end. Preferably, the first sidewall 1213 and the second sidewall 1214 are arranged in parallel. The distal end also includes two first baffles 1215 and 1216 and a second baffle 1217. The two first baffles 1215 and 1216 and the second baffle 1217 are all disposed between the first sidewall 1213 and the second sidewall 1214. The second baffle 1217 is disposed at the distal end of the first sidewall 1213 and the second sidewall 1214 and connects the first sidewall 1213 and the second sidewall 1214. The first baffle 1215 is disposed on the proximal inner wall of the first sidewall 1213 and the first baffle 1216 is disposed on the proximal inner wall of the second sidewall 1214. The two first baffles 1215 and 1216 are arranged opposite each other (i.e., the two first baffles 1215 and 1216 are disposed on the same plane). The distance between the two first baffles 1215 and 1216 is greater than or equal to the outer diameter of the drive rod 11 and is greater than or equal to the outer diameter of the separation rod 212 and the drive rod 11.

[0049] The distal end portion has a first cavity 141 and a second cavity 142. The first cavity 141 is surrounded by a first sidewall 1213, a second sidewall 1214, and two first baffles 1215 and 1216, and the first cavity 141 communicates with the internal space 1212 of the proximal end portion. The second cavity 142 is surrounded by the first sidewall 1213, the second sidewall 1214, two first baffles 1215 and 1216, and a second baffle 1217, and the first cavity 141 and the second cavity 142 communicate with each other.

[0050] The second baffle 1217 has a first through hole 1218. The first through hole 1218 is coaxially arranged with the inner space 1212 of the proximal end. The projections of the first through hole 1218 and the inner ring of the proximal end on the planes where the two first baffles 1215 and 1216 are located overlap. The center line of the first through hole 1218 overlaps with the center line of the gap between the two first baffles 1215 and 1216, so that the drive rod 11 and the separation rod 212 can pass through the inner space 1212, the first cavity 141, the gap between the two first baffles 1215 and 1216, the second cavity 142 and the first through hole 1218 along the axial direction.

[0051] Figure 4 This is a structural schematic diagram of the locking component in this embodiment. Figure 4 As shown, the locking member 122 can be made of elastic materials such as stainless steel, nickel-titanium alloy, or cobalt-chromium alloy, so that the locking member 122 can elastically lock the drive rod 11 or the separation rod 212 radially in the locked state, thereby restricting the axial movement of the drive rod 11 or the separation rod 212 in the drive slider 121, realizing the locking of the drive rod 11 or the separation rod 212, thereby realizing that the clamping and lifting structure 13 is in a fixed posture and does not move relative to it, that is, realizing the locking state of the clamping and lifting structure 13.

[0052] The locking member 122 includes a limiting member 1221, a supporting member, and a clamping member. The limiting member 1221 is disposed in the first cavity 141, and the supporting member and the clamping member are disposed in the second cavity 142. The limiting member 1221 is located at the proximal end of the supporting member. The limiting member 1221 is connected to the proximal end of the supporting member, and the proximal end of the clamping member is connected to the proximal end of the supporting member. The clamping member has an angle with the axis, and the inner diameter of the clamping member gradually decreases from the proximal end to the distal end, and is smallest at the distal end of the clamping member.

[0053] The limiting component 1221 is, for example, a square plate, and has a second through hole 1222. The diameter of the second through hole 1222 is greater than or equal to the outer diameter of the separating rod 212 and the driving rod 11. Preferably, the diameter of the second through hole 1222 is the same as the diameter of the first through hole 1218. The separating rod 212 or the driving rod 11 passes through the second through hole 1222, and the second through hole 1222 and the first through hole 1218 are coaxially arranged, so that the limiting component 1221 is limited in the first cavity 141 outside the separating rod 212 or the driving rod 11, so as to achieve mutual fixation between the locking member 122 and the driving slider 121.

[0054] The supporting component includes two support rods 1223 and 1224, which are respectively connected to the two sides of the limiting component 1221 facing each other. The two support rods 1223 and 1224 are symmetrically arranged, and the proximal ends of the two support rods 1223 and 1224 are disposed in the gap between the two first baffles 1215 and 1216. The support rods are wavy, so that the distance between the two support rods 1223 and 1224 first increases, then decreases, and then increases again from the proximal end to the distal end. The minimum distance between the two support rods 1223 and 1224 is greater than the outer diameter of the separating rod 212 and the driving rod 11.

[0055] The clamping component includes two ridges 1225 and 1226, which are located inside the two support rods 1223 and 1224. Each ridge is connected to the proximal end of one of the support rods. The two ridges 1225 and 1226 are symmetrically arranged, with the maximum distance between them at the proximal end and the minimum distance at the distal end (i.e., the minimum distance at the distal end). In its natural state, the minimum distance between the two ridges 1225 and 1226 is less than that between the separating rod 21. The outer diameter of the drive rod 11 and the separation rod 212 are such that when the drive rod 11 and the separation rod 212 are inserted into the clamping component, the drive rod 11 and the separation rod 212 are located inside the two edges 1225 and 1226, and the two edges 1225 and 1226 apply radial pressure to the drive rod 11 or the separation rod 212 in the radial direction, so that the drive rod 11 or the separation rod 212 cannot move axially, that is, the drive rod 11 or the separation rod 212 is in a locked state, thereby realizing the locking of the clamping and lifting structure 13.

[0056] Each of the support rods has a third through hole 1227 at its distal end. The third through hole 1227 is used to connect the distal end of the pull wire so that when the pull wire is pulled at the proximal end, the support rod can cause the edge to move radially outward due to elastic deformation. That is, under the action of the pulling force, the two support rods 1223 and 1224 undergo elastic deformation, which in turn causes the two edges 1225 and 1226 to undergo elastic deformation and move radially outward, thereby increasing the distance between the two edges 1225 and 1226, especially the two edges 1225 and 1226. When the minimum distance between the far ends of 25 and 1226 increases, and the minimum distance between the two edges 1225 and 1226 is greater than or equal to the outer diameter of the separating rod 212 and the driving rod 11, there is no radial force between the clamping component and the driving rod 11 or the separating rod 212. At this time, the driving rod 11 and the separating rod 212 can move axially, that is, the driving rod 11 and the separating rod 212 are in an axial movement state, thereby realizing the continuous clamping and lifting actions of the clamping and lifting structure 13, that is, the release state.

[0057] Optionally, a fourth through hole 1219 can be provided on both the first sidewall 1213 and the second sidewall 1214, and the fourth through hole 1219 is used to rotatably connect the clamping and lifting structure 13.

[0058] This embodiment also provides a method for operating a valve repair system, including the following steps:

[0059] First, the distal end of the separation rod 212 is detachably connected to the proximal end of the drive rod 11, and the distal end of the separation tube 211 is placed in the opening 1211 to complete the installation of the valve repair device 1.

[0060] Next, the pull wires provide radial outward tension to the two support rods 1223 and 1224 respectively, until the minimum distance between the two edges 1225 and 1226 is greater than the outer diameter of the drive rod 11 and the separation rod 212, so that the drive rod 11 or the separation rod 212 can move axially, thereby making the clamping and lifting structure 13 in the released state.

[0061] Next, the pull line is released, and the two support rods 1223 and 1224 drive the two edges 1225 and 1226 to retract radially, so that the two edges 1225 and 1226 lock the drive rod 11 or the separation rod 212 radially, thereby making the clamping and lifting structure 13 locked.

[0062] Next, the distal end of the separating rod 212 and the proximal end of the driving rod 11 are separated, and the inner diameter of the distal end of the separating tube 211 is contracted to its original state, so that the distal end of the separating tube 211 is disengaged from the opening 1211. The separating tube 211 and the separating rod 212 are then withdrawn to complete the release of the valve repair device 1.

[0063] In summary, the present invention provides a valve repair device, a valve repair system, and a method for operating the same. In this valve repair system, the driving rod and the separating rod are locked or released by a locking component. The locking structure of the present invention is simple and realizes the switching between the locking state and the axial movement state of the driving rod and the separating rod, thereby realizing the switching between the locking state and the movement state of the clamping and supporting structure. That is, it realizes the locking of the clamping and supporting structure at any time during the valve leaflet clamping process. At the same time, the valve repair system is easy to release related tissues and is convenient for doctors to operate.

[0064] Furthermore, it should be noted that, unless otherwise specified or indicated, the terms "first" and "second" in the specification are used only to distinguish the various components, elements, steps, etc. in the specification, and not to indicate the logical or sequential relationships between the various components, elements, steps, etc.

[0065] It is understood that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A valve repair device, characterized in that, The device includes a stop structure, a drive rod, and a clamping and lifting structure. The drive rod is axially movable and passes through the stop structure, and the proximal end of the drive rod is detachably connected to the distal end of the separation rod of the delivery conduit. The proximal end of the clamping and lifting structure is rotatably connected to the stop structure, and the distal end is rotatably connected to the drive rod. The stop structure includes a drive slider and a locking member disposed within the drive slider, and the locking member elastically holds the outside of the drive rod. The locking component includes a limiting component, a supporting component, and a clamping component. The limiting component is connected to and located at the proximal end of the supporting component. The distal end of the driving slider includes a distal end portion, which includes a first sidewall and a second sidewall facing each other, and two first baffles and a second baffle disposed between the first sidewall and the second sidewall. The second baffle is disposed at the distal end of the first sidewall and the second sidewall and connects the first sidewall and the second sidewall. Each first baffle is disposed on the proximal end wall of a first sidewall, and the two first baffles are disposed on the same plane, such that the first sidewall, the second sidewall, and the two first baffles form a first cavity, and the first sidewall, the second sidewall, the two first baffles, and the second baffle form a second cavity. The second baffle is provided with a first through hole. The limiting component is disposed in the first cavity and has a second through hole. The second through hole is coaxially disposed with the first through hole. The supporting component and the clamping component are disposed in the second cavity. The supporting component includes two symmetrically arranged supporting rods, which are respectively connected to the two sides of the limiting component facing each other. The two supporting rods are disposed in the gap between the two first baffles and in the second cavity. The supporting rods are wavy, so that the distance between the two supporting rods first increases, then decreases, and then increases again from the proximal end to the distal end, and the minimum distance between the two supporting rods is greater than the outer diameter of the driving rod. The clamping component includes two ridges, which are symmetrically arranged on the inner side of the two supporting rods, and each ridge is connected to the proximal end of a supporting rod. The distance between the two ridges is the largest at the proximal end and the smallest at the distal end, and the minimum distance is less than the outer diameter of the driving rod, so that when no external force is applied, the locking member elastically clamps the driving rod radially, thereby realizing the locking state of the clamping and lifting structure. When a radial outward pulling force is applied to the locking member, there is no radial force between the locking member and the drive rod, thereby realizing the release state of the clamping and lifting structure.

2. The valve repair device as described in claim 1, characterized in that, The proximal end of the drive slider includes a proximal end portion, which is tubular and has an opening on its proximal end wall. The opening is fixedly connected to the distal end of the separation tube of the delivery conduit. The proximal end portion has an internal space, and the drive rod is axially movable through the internal space.

3. The valve repair device as described in claim 2, characterized in that, The internal space, the first cavity, and the second cavity are connected in sequence. The first through hole is coaxially arranged with the internal space, and the central axis of the first through hole overlaps with the center line of the gap between the two first baffles.

4. The valve repair device as described in claim 1, characterized in that, The locking element is made of an elastic material.

5. The valve repair device as described in claim 3, characterized in that, During the conveying process, the drive rod and the separation rod are sequentially inserted from the near end to the far end into the internal space, the first through hole, the gap between the two first baffles, the space between the two edges, and the second through hole.

6. The valve repair device as described in claim 1, characterized in that, Each of the support rods has a third through hole at its distal end. During the conveying process, the third through hole connects to the distal end of the pull wire. When the pull wire provides radial outward tension to the support rod, the two support rods and the two edges undergo elastic deformation and drive the two edges to move radially outward to increase the minimum distance, thereby realizing the axial movement state of the drive rod and thus realizing the release state of the clamping and lifting structure.

7. A valve repair system, characterized in that, The device includes the valve repair apparatus as described in claim 2, and a delivery device, the delivery device including a delivery catheter, the delivery catheter including a separating rod and a separating tube, the distal end of the separating rod being detachably connected to the proximal end of a driving rod, the distal end of the separating tube being fitted and fixed in the opening, and the separating rod and the driving rod being axially movable through a stop structure.

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