CN216455497U

CN216455497U - Valve repair device and valve repair system

Info

Publication number: CN216455497U
Application number: CN202122979108.8U
Authority: CN
Inventors: 谭健
Original assignee: Zhixin Medical Technology Shanghai Co ltd
Current assignee: Zhixin Medical Technology Shanghai Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-05-10
Anticipated expiration: 2031-11-30

Abstract

The utility model provides a valve repair device and a valve repair system, wherein the valve repair device comprises a stopping structure, a driving rod and a clamping and lifting structure, the near end of the clamping and lifting structure is rotatably connected with the stopping structure, and the far end of the clamping and lifting structure is rotatably connected with the driving rod; the stopping structure comprises a driving sliding block and a locking piece arranged in the driving sliding block, and the locking piece is elastically arranged on the outer side of the driving rod in an embracing mode; when no external force acts, the locking piece elastically locks the driving rod along the radial direction so as to realize the locking state of the clamping and lifting structure; when radial external tension is provided for the locking piece, no radial acting force exists between the locking piece and the driving rod, so that the locking structure is simple, the release state of the clamping and lifting structure is realized, the valve repairing device can be locked at any time in the process of clamping the valve leaflet, and meanwhile, the valve repairing system is convenient for releasing relevant tissues and is convenient for a doctor to operate.

Description

Valve repair device and valve repair system

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a heart valve repair device and a heart valve repair system, which realize valve repair by adopting a minimally invasive intervention mode.

Background

Heart valves (i.e., aortic, pulmonary, tricuspid, and mitral valves) play a critical role in ensuring forward flow of adequate blood supply through the cardiovascular system. These heart valves may be compromised by congenital malformations, inflammatory processes, infectious conditions, disease, etc., resulting in a reduced effectiveness of the heart valve, which damage can lead to serious cardiovascular damage or death. Damaged heart valves may be repaired or replaced by open heart surgery. However, open heart surgery is highly invasive, which may cause complications. Transcatheter interventional vascular techniques allow the introduction and implantation of prosthetic devices in a much less invasive manner than direct visualization of the heart. The valve repair device is mainly applied to a transcatheter interventional vascular technology, realizes valve edge-to-edge repair through a transcatheter, and has small wound and quick recovery compared with the traditional operation.

The complex structure or functional defects of the current edge-to-edge intervention repair device can easily cause the valve repair device to be wound or clamped with relevant tissues (such as chordae tendineae) and the locking mechanism to be complex when the valve repair device is operated, or the valve repair system is convenient to release the relevant tissues but can only realize the locking at a special position.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve repair device and a valve repair system, which are simple in locking structure, can be locked at any time in the process of clamping valve leaflets by the valve repair device, and meanwhile, the valve repair system is convenient for releasing relevant tissues and is convenient for a doctor to operate.

In order to solve the problems, the utility model provides a valve repair device, which comprises a stopping structure, a driving rod and a clamping and lifting structure, wherein the driving rod can axially and movably penetrate through the stopping structure, and the near end of the driving rod is detachably connected with the far end of a separation rod of a conveying catheter; the near end of the clamping and lifting structure is rotatably connected with the stopping structure, and the far end of the clamping and lifting structure is rotatably connected with the driving rod; the stopping structure comprises a driving sliding block and a locking piece arranged in the driving sliding block, and the locking piece is elastically arranged on the outer side of the driving rod in a surrounding mode;

when no external force is applied, the locking piece elastically locks the driving rod along the radial direction so as to realize the locking state of the clamping and lifting structure; when the retaining member provides radial external tension, no radial acting force exists between the retaining member and the driving rod, so that the releasing state of the clamping and lifting structure is realized.

Optionally, the proximal end of the driving slider includes a proximal end portion, the proximal end portion is tubular, and an opening is formed in a proximal end wall of the proximal end portion, the opening is fixedly connected to the distal end of the separation tube of the delivery catheter, the proximal end portion has an inner space, and the driving rod is axially movably inserted into the inner space.

Further, the far end of the driving slider comprises a far end portion, the far end portion comprises a first side wall and a second side wall which are arranged oppositely, and two first baffle plates and a second baffle plate which are arranged between the first side wall and the second side wall, the second baffle plate is arranged at the far end of the first side wall and the second side wall and is connected with the first side wall and the second side wall, each first baffle plate is arranged on the near end wall of one first side wall, and the two first baffle plates are arranged on the same plane, so that the first side wall, the second side wall and the two first baffle plates enclose a first cavity, and the first side wall, the second side wall, the two first baffle plates and the second baffle plate enclose a second cavity.

Further, inner space, first cavity and second cavity communicate in proper order, just be provided with first through-hole on the second baffle, first through-hole and inner space coaxial setting, just the central axis of first through-hole is located two the central line in clearance between the first baffle overlaps.

Optionally, the retaining member is made of an elastic material.

Optionally, the retaining member includes stop part, supporting component and holds tightly the part, stop part connects the proximal end tip of supporting component, hold tightly the proximal end of part and connect the proximal end of supporting component, hold tightly and have the contained angle between part and the axis, just hold tightly the internal diameter of part and reduce gradually to the distal end along the proximal end, and hold tightly the distal end of part minimum.

Further, the limiting component is arranged in the first cavity and provided with a second through hole, the second through hole is coaxially arranged with the first through hole, the supporting component and the holding component are arranged in the second cavity, and the limiting component is located at the near end of the supporting component.

Furthermore, the supporting part comprises two supporting rods, the two supporting rods are respectively connected to two sides of the limiting part opposite to the limiting part, and the two supporting rods are arranged in a gap between the two first baffles and the second cavity.

Furthermore, the clasping component comprises two edges, the two edges are symmetrically arranged on the inner sides of the two support rods, and each edge is connected with the near end of one support rod;

in the conveying process, the driving rod and the separating rod sequentially penetrate through the inner space, the first through hole, the gap between the two first baffles, the two ribs and the second through hole from the near end to the far end.

Furthermore, two the interval of arris at the near-end is the biggest, has minimum interval at the distal end, just minimum interval is less than the external diameter of release lever and actuating lever for when no exogenic action, retaining member is along radial elastic lock the actuating lever to realize the locking state of actuating lever and release lever, thereby realize the locking state of centre gripping lifting structure.

Furthermore, the far end of each support rod is provided with a third through hole, in the conveying process, the third through hole is connected with the far end of the stay wire, and when the stay wire provides radial external tension for the support rods, the two support rods and the two edges are elastically deformed and drive the two edges to move outwards in the radial direction so as to increase the minimum distance, so that the axial movement state of the drive rod is realized, and the release state of the clamping and lifting structure is realized.

In another aspect, the utility model further provides a valve repair system, which includes the valve repair device, and a delivery device, where the delivery device includes a delivery catheter, the delivery catheter includes a separation rod and a separation tube, a distal end of the separation tube is detachably connected to a proximal end of the drive rod, a distal end of the separation rod is fixed in the opening in a matching manner, the separation rod and the drive rod are axially movably inserted into the stop structure, and the locking member is elastically clasped outside the drive rod and is used to switch between a locking state and a releasing state of the separation rod and the drive rod.

In yet another aspect, the present invention also provides a method of operating a valve repair system, comprising the steps of:

detachably connecting the distal end of the separation rod to the proximal end of the driving rod, and arranging the distal end of the separation tube in the opening to complete installation of the valve repair device;

respectively providing radial external tension for the two support rods until the minimum distance between the two edges is larger than the outer diameters of the drive rod and the separation rod, so that the clamping and lifting structure is in a release state;

withdrawing the external pulling force, and driving the two ridges to radially contract by the two supporting rods, so that the driving rod or the separating rod is radially locked by the two ridges, and the clamping and lifting structure is in a locked state; and

separating the distal end of the separator rod and the proximal end of the drive rod, disengaging the distal end of the separator tube from the opening, and withdrawing the separator tube and separator rod to complete the release of the valve repair device.

Compared with the prior art, the utility model has the following technical effects:

the utility model provides a valve repair device and a valve repair system, wherein the valve repair device comprises a stopping structure, a driving rod and a clamping and lifting structure, the driving rod can axially and movably penetrate through the stopping structure, and the near end of the driving rod is detachably connected with the far end of a separation rod of a conveying catheter; the near end of the clamping and lifting structure is rotatably connected with the stopping structure, and the far end of the clamping and lifting structure is rotatably connected with the driving rod; the stopping structure comprises a driving sliding block and a locking piece arranged in the driving sliding block, and the locking piece is elastically arranged on the outer side of the driving rod in a surrounding mode; when no external force is applied, the locking piece elastically locks the driving rod along the radial direction so as to realize the locking state of the clamping and lifting structure; when radial external tension is provided for the locking piece, no radial acting force exists between the locking piece and the driving rod, so that the locking structure is simple, the release state of the clamping and lifting structure is realized, the valve repairing device can be locked at any time in the process of clamping the valve leaflet, and meanwhile, the valve repairing system is convenient for releasing relevant tissues and is convenient for a doctor to operate.

Drawings

FIG. 1 is a schematic view of a valve repair system according to an embodiment of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is a schematic view of the distal end of the delivery catheter and the connection structure of the valve repair device according to one embodiment of the present invention;

FIGS. 4-5 are schematic partial cross-sectional views of a valve repair device according to an embodiment of the utility model;

FIGS. 6-7 are schematic structural views of a driving slider according to an embodiment of the present invention;

FIG. 8 is a schematic view of a retaining member according to an embodiment of the present invention.

Description of reference numerals:

1-a valve repair device; 11-a drive rod; 12-a stop arrangement; 121-driving the slider; 1211-opening; 1212 — an inner space; 1213-first side wall; 1214-a second side wall; 1215. 1216-a first baffle; 1217-second baffle; 1218 — a first via; 1219-fourth through hole; 122-a retaining member; 1221-a stop member; 1222-a second through hole; 1223. 1224-support bar; 1225. 1226-arris; 1227-third through hole; 13-clamping and lifting structure; 141-a first cavity; 142-a second cavity;

2-a catheter assembly; 21-a delivery catheter; 211-separation tube; 212-a separator bar; 22-an inner sheath catheter; 23-a sheath catheter; 3-a delivery handle; 31-a first handle; 32-a second handle; 33-a third handle;

4-native valve leaflets.

Detailed Description

A valve repair device, a valve repair system, and methods of operating the same of the present invention are described in further detail below. The present invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the utility model are shown, it being understood that one skilled in the art may modify the utility model herein described while still achieving the advantageous effects of the utility model. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the utility model.

In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions or constructions are not described in detail since they would obscure the utility model in unnecessary detail. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.

In order to make the objects and features of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly aiding in the description of the embodiments of the utility model. As used herein, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The terms "inner", "outer", and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. Herein, the terms "distal" and "proximal" are all relative orientations, relative positions, directions of elements or actions with respect to each other from the perspective of a physician using the medical device, although "distal" and "proximal" are not intended to be limiting, but "proximal" generally refers to the end of the medical device that is closer to the operator during normal operation, and "distal" generally refers to the end that is closer to the patient's heart.

Fig. 1 is a schematic structural diagram of a valve repair system according to this embodiment. Fig. 2 is an enlarged schematic view of region a in fig. 1. As shown in fig. 1-2, the present embodiment provides a valve repair system comprising a delivery device and a valve repair device 1, the valve repair device 1 being removably attached at a distal end of the delivery device.

The delivery device comprises a delivery handle 3 and a catheter assembly 2, wherein the catheter assembly 2 comprises an outer sheath catheter 23, an inner sheath catheter 22 and a delivery catheter 21 which are sequentially sleeved from outside to inside, the distal end of the inner sheath catheter 22 extends out of the distal end of the outer sheath catheter 23, and the distal end of the delivery catheter 21 extends out of the distal end of the inner sheath catheter 22.

The delivery handle 3 comprises a first handle 31, a second handle 32 and a third handle 33 which are sequentially arranged from the proximal end to the distal end, wherein the first handle 31 is connected with the proximal end of the delivery catheter 21 and is used for controlling the valve repair device 1 to realize functions of loading, delivering, releasing and the like during delivery; the second handle 32 is connected with the proximal end of the inner sheath catheter 22 and is used for controlling the bending control of the distal end of the inner sheath catheter 22 so as to establish a minimally invasive access channel during the delivery process; the third

A handle 33 is attached to the proximal end of the outer sheath catheter 23 and is used to control bending of the outer sheath catheter 23 to create a minimally invasive access path to the inner sheath catheter 22, delivery catheter 21, and valve repair device 1 during delivery.

Fig. 3 is a schematic view of the connection structure of the distal end of the delivery catheter and the valve repair device provided in this embodiment. Fig. 4-5 are schematic partial cross-sectional views of the valve repair device of this embodiment. As shown in fig. 3-5, the delivery catheter 21 includes a separation tube 211 and a separation rod 212 sleeved from outside to inside, 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 in the separation tube 211. The delivery device is detachably connected to the valve repair device 1 through the separation rod 212 and the separation tube 211.

The distal end of separator tube 211 has at least two elasticity coupling assembling, all elasticity coupling assembling along the circumference interval setting of separator tube 211, preferentially, all elasticity coupling assembling is along the circumference of separator tube 211 is evenly arranged. The elastic connecting component is generally arranged in a T shape. The distance from the elastic connecting assembly to the axis is smaller than half of the outer diameter of the separating rod 212, and the elastic connecting assembly is made of elastic materials.

The valve repair device 1 comprises a driving rod 11, a stop structure 12 and a clamping and lifting structure 13, wherein the driving rod 11 is axially movably arranged in the stop structure 12 in a penetrating mode. The clamping and lifting structure 13 is used for lifting and clamping a valve, the clamping and lifting structure 13 is rotatably connected with the stop structure 12 at the near end and is rotatably connected with the driving rod 11 at the far end, so that when the driving rod 11 axially moves in the stop structure 12, the clamping and lifting structure 13 rotates at the joint with the stop structure 12 and the joint with the driving rod 11, and the shape of the clamping and lifting structure 13 is changed, so that the valve is lifted and clamped. The stop structure 12 is used for switching the releasing state and the locking state of the clamping and lifting structure 13 by switching the axial movement state and the locking state of the driving rod 11 and the separating rod 212. The proximal end of the drive rod 11 is removably attached to the distal end of the release rod 212. Preferably, the outer diameter of the driving rod 11 is the same as the outer diameter of the separation rod 212, so that the separation rod 212 and the driving rod 11 can easily move axially in the stopper 12.

With continued reference to fig. 4-5, the stopping mechanism 12 includes a driving slider 121 and a locking member 122 disposed inside the driving slider 121, the driving rod 11 is disposed through the driving slider 121 and the locking member 122, so that during the transportation process, the separation rod 212 drives the driving rod 11 to axially move in the driving slider 121, and the locking member 122 switches between the axial movement state and the locking state of the separation rod 212 and the driving rod 11.

Fig. 6 to 7 are schematic structural views of the driving slider of the present embodiment. As shown in fig. 6 to 7, the driving slider 121 includes a proximal portion and a distal portion in order from the proximal end to the distal end in the axial direction, the proximal portion is generally tubular, the proximal portion has an inner space 1212 extending therethrough in the axial direction, and the separation rod 212 and the driving rod 11 are axially movable in the inner space 1212. An opening 1211 is formed on a side wall of a proximal end of the proximal end portion along an axial direction, the opening 1211 is matched with the elastic connection assembly, the opening 1211 is also substantially in a T shape, when the valve repair device 1 is connected with the delivery device, the distal end of the separation rod 212 is detachably connected with the proximal end of the driving rod 11, at the moment, the elastic connection assembly is subjected to radial elastic supporting force, and the elastic connection assembly is fixed in the opening 1211.

The distal portion includes a first side wall 1213 and a second side wall 1214 disposed opposite to each other, wherein a proximal end of the first side wall 1213 and a proximal end of the second side wall 1214 are connected to a distal end of the proximal portion, and preferably, the first side wall 1213 and the second side wall 1214 are disposed in parallel. The distal end portion further includes two

first baffles

1215, 1216 and a second baffle 1217, the two

first baffles

1215, 1216 and the second baffle 1217 are 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, the first baffle 1216 is disposed on the proximal inner wall of the second sidewall 1214, and the two

first baffles

1215, 1216 are disposed in facing relation (i.e., the two

first baffles

1216, 1215 are disposed on the same plane), the spacing between the two

first baffles

1215, 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 disengagement rod 212 and the drive rod 11.

The distal end portion is formed with a first cavity 141 and a second cavity 142, the first cavity 141 is surrounded by the first side wall 1213, the second side wall 1214, the two

first baffles

1215, 1216, and the first cavity 141 communicates with the inner space 1212 of the proximal end portion. The second cavity 142 is defined by the first sidewall 1213, the second sidewall 1214, the two

first baffles

1215, 1216 and the second baffle 1217, and the first cavity 141 and the second cavity 142 are communicated.

The second baffle 1217 has a first through hole 1218 formed thereon, the first through hole 1218 being disposed coaxially with the inner space 1212 of the proximal end portion, and the first through hole 1218 and a projection of the inner ring of the proximal end portion onto a plane in which the two

first baffles

1215, 1216 are located overlap, and a center line of the first through hole 1218 overlaps with a center line of a gap between the two

first baffles

1215, 1216, so that the driving rod 11 and the separation rod 212 can axially penetrate through the inner space 1212, the first cavity 141, the gap between the two

first baffles

1215, 1216, the second cavity 142, and the first through hole 1218.

Fig. 8 is a schematic structural view of the retaining member of this embodiment. As shown in fig. 8, the material of the locking member 122 may be an elastic material such as stainless steel, nickel-titanium alloy, or cobalt-chromium alloy, so that the locking member 122 can elastically lock the driving rod 11 or the separating rod 212 in the radial direction when in the locked state, so as to limit the driving rod 11 or the separating rod 212 from performing axial movement in the driving slider 121, thereby achieving locking of the driving rod 11 or the separating rod 212, and thus achieving that the clamping and lifting structure 13 is in a fixed posture and does not move relatively, that is, achieving the locked state of the clamping and lifting structure 13.

The retaining member 122 includes a limiting member 1221, a supporting member and a clasping member, the limiting member 1221 is disposed in the first cavity 141, the supporting member and the clasping member are disposed in the second cavity 142, and the limiting member 1221 is located at the proximal end of the supporting member. The spacing component 1221 is connected the proximal end tip of supporting component, hold the proximal end of part and connect the proximal end of supporting component, hold and have the contained angle between part and the axis tightly, just hold the internal diameter of part and reduce gradually to the distal end along the proximal end, just hold the distal end of part tightly minimum.

The limiting member 1221 is, for example, in a square sheet shape, and the limiting member 1221 has a second through hole 1222, a diameter of the second through hole 1222 is greater than or equal to an outer diameter of the separation rod 212 and the driving rod 11, and preferably, a diameter of the second through hole 1222 is the same as a diameter of the first through hole 1218. The separation rod 212 or the driving rod 11 is inserted into the second through hole 1222, and the second through hole 1222 and the first through hole 1218 are coaxially disposed, so that the limiting component 1221 is limitedly disposed in the first cavity 141 outside the separation rod 212 or the driving rod 11, so as to achieve mutual fixation between the locking member 122 and the driving slider 121.

The support member comprises two

support rods

1223, 1224, the two

support rods

1223, 1224 are respectively connected to the two sides of the position-limiting member 1221, the two

support rods

1223, 1224 are symmetrically arranged, and the proximal ends of the two

support rods

1223, 1224 are arranged in the gap between the two

first baffles

1215, 1216. The support rods are wavy such that the spacing between the two

support rods

1223, 1224 increases from the proximal end to the distal end, decreases, and increases, and the minimum spacing between the two

support rods

1223, 1224 is greater than the outer diameter of the disengagement lever 212 and the drive lever 11.

The clasping member comprises two

ribs

1225, 1226, the two

ribs

1225, 1226 being located inside the two

support bars

1223, 1224, and each rib is connected to the proximal end of one of the support rods, the two

ribs

1225, 1226 are symmetrically arranged, and the distance between the two

ribs

1225, 1226 at the proximal end is the largest, the spacing at the distal end is minimal (i.e. there is a minimum spacing at the distal end), and in the natural state, the minimum spacing between the two

edges

1225, 1226 is smaller than the outer diameter of the release lever 212 and the drive lever 11, so that when the drive lever 11 and the release lever 212 are threaded into the clasping member, the driving rod 11 and the separating rod 212 are located inside the two

edges

1225, 1226, and the two

ribs

1225, 1226 radially exert a radial pressure on the driving lever 11 or the separation lever 212, so that the driving lever 11 or the separation lever 212 cannot perform an axial movement, namely, the driving rod 11 or the separating rod 212 is in a locking state, so that the clamping and lifting structure 13 is locked.

The distal end of each support rod is provided with a third through hole 1227, the third through hole 1227 is used for connecting the distal end of the pull wire, so that when the pull wire is pulled at the proximal end, the support rod can drive the ribs to move radially outwards due to elastic deformation, that is, when the pull wire is under the action of the pulling force, the two support rods 1223, 1224 generate elastic deformation and drive the two ribs 1225, 1226 to elastically deform and move radially outwards, so that the distance between the two ribs 1225, 1226 is increased, especially the minimum distance between the distal ends of the two ribs 1225, 1226 is increased, when the minimum distance between the two ribs 1225, 1226 is greater than or equal to the outer diameter of the release rod 212 and the drive rod 11, there is no radial acting force between the clasping member and the drive rod 11 or the release rod 212, and at this time, the drive rod 11 and the release rod 212 can move axially, that is, the drive rod 11 and the release rod 212 are in an axial moving state, therefore, the actions of clamping, lifting and the like of the clamping and lifting structure 13 are continuously carried out, namely, the releasing state is realized.

Optionally, a fourth through hole 1219 can be disposed on each of the first side wall 1213 and the second side wall 1214, and the fourth through hole 1219 is used for rotatably connecting the clamping and lifting structure 13.

The present embodiments also provide a method of operating a valve repair system, comprising the steps of:

first, the distal end of the separation rod 212 is detachably attached to the proximal end of the drive rod 11, and the distal end of the separation tube 211 is disposed in the opening 1211 to complete the installation of the valve repair apparatus 1;

then, the pulling wires provide radial external pulling force to the two

support rods

1223, 1224 respectively until the minimum distance between the two

edges

1225, 1226 is larger than the outer diameter of the driving rod 11 and the separating rod 212, so that the driving rod 11 or the separating rod 212 can move axially, thereby the clamping and lifting structure 13 is in the release state;

then, the pulling wire is loosened, the two

support rods

1223, 1224 drive the two

ribs

1225, 1226 to contract radially, so that the two

ribs

1225, 1226 lock the driving rod 11 or the separating rod 212 radially, thereby the clamping and lifting structure 13 is in a locked state;

next, the distal end of the separation rod 212 and the proximal end of the driving rod 11 are separated, the distal end inner diameter of the separation tube 211 is contracted to the original state, so that the distal end of the separation tube 211 is disengaged from the opening 1211, and the separation tube 211 and the separation rod 212 are withdrawn to complete the release of the valve repair device 1.

In summary, the valve repair device, the valve repair system and the working method thereof provided by the utility model have the advantages that the valve repair system locks or releases the driving rod and the separating rod through the locking piece, the locking structure of the valve repair device is simple, and the switching between the locking state and the axial movement state of the driving rod and the separating rod is realized, so that the switching between the locking state and the movement state of the clamping and lifting structure is realized, namely the clamping and lifting structure is locked at any time in the clamping process of the valve leaflet, and meanwhile, the valve repair system is convenient for releasing relevant tissues and is convenient for a doctor to operate.

In addition, it should be noted that the terms "first" and "second" in the specification are only used for distinguishing each component, element, step and the like in the specification, and are not used for indicating a logical relationship or a sequential relationship between each component, element, step and the like, unless otherwise specified or indicated.

It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the utility model to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the utility model without departing from the scope of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. The valve repair device is characterized by comprising a stopping structure, a driving rod and a clamping and lifting structure, wherein the driving rod is axially movably arranged in the stopping structure in a penetrating way, and the near end of the driving rod is detachably connected with the far end of a separating rod of a conveying catheter; the near end of the clamping and lifting structure is rotatably connected with the stopping structure, and the far end of the clamping and lifting structure is rotatably connected with the driving rod; the stopping structure comprises a driving sliding block and a locking piece arranged in the driving sliding block, and the locking piece is elastically arranged on the outer side of the driving rod in a surrounding mode;

2. The valve repair device of claim 1, wherein the proximal end of the drive block includes a proximal end portion, the proximal end portion being tubular and having an opening in a proximal end wall thereof, the opening being fixedly coupled to a distal end of the separation tube of the delivery catheter, the proximal end portion having an interior space, the drive rod being axially movably disposed through the interior space.

3. The valve repair device of claim 2, wherein the distal end of the drive slide includes a distal portion including first and second oppositely disposed sidewalls, and two first and second baffles disposed between the first and second sidewalls, the second baffle being disposed distal to and connecting the first and second sidewalls, each of the first baffles being disposed on a proximal wall of one of the first sidewalls, and the two first baffles being disposed in a common plane such that the first sidewall, the second sidewall, the two first baffles define a first cavity, and the first sidewall, the second sidewall, the two first baffles and the second baffle define a second cavity.

4. The valve repair device of claim 3, wherein the interior space, the first cavity and the second cavity are in communication in sequence, and the second baffle is provided with a first through hole, the first through hole is coaxially arranged with the interior space, and the central axis of the first through hole is positioned at the center line of the gap between the two first baffles and is overlapped.

5. The valve repair device of claim 1, wherein the retaining member is made of a resilient material.

6. The valve repair device of claim 4, wherein the retaining member includes a retaining member, a support member, and a clasping member, the retaining member is coupled to a proximal end of the support member, a proximal end of the clasping member is coupled to a proximal end of the support member, the clasping member is angled relative to the axis, and an inner diameter of the clasping member decreases proximally and distally and is smallest at the distal end of the clasping member.

7. The valve repair device of claim 6, wherein the stop member is disposed in a first cavity and the stop member has a second through hole disposed coaxially with the first through hole, the support member and the clasping member being disposed in a second cavity and the stop member being located proximal to the support member.

8. The valve repair device of claim 6, wherein the support member comprises two support rods, the two support rods are respectively connected to two sides of the position limiting member, and the two support rods are arranged in the gap between the two first baffles and in the second cavity.

9. The valve repair device of claim 8, wherein the clasping means comprises two ribs symmetrically disposed on the inner side of the two support rods, and each rib is connected to the proximal end of one of the support rods;

10. The valve repair device of claim 9, wherein the two ribs are spaced the greatest at the proximal end and have a minimum spacing at the distal end, and wherein the minimum spacing is less than an outer diameter of the separator rod and the drive rod.

11. The valve repair device of claim 10, wherein the distal end of each of the struts has a third through-hole, the third through-hole engaging the distal end of the pull wire during delivery and resiliently deforming the two struts and the two ribs and moving the two ribs radially outward to increase the minimum separation when the pull wire provides a radially outward pulling force on the struts.

12. A valve repair system, comprising the valve repair device according to any one of claims 1 to 11, and a delivery device, wherein the delivery device comprises a delivery catheter, the delivery catheter comprises a separation rod and a separation tube, the distal end of the separation tube is detachably connected with the proximal end of the drive rod, the distal end of the separation rod is fixed in the opening in a matching manner, the separation rod and the drive rod are axially movably arranged in a stop structure in a penetrating manner, and a locking member is elastically embraced outside the drive rod and used for switching the locking state and the releasing state of the separation rod and the drive rod.