CN116327431A - Valve repair device and valve repair system - Google Patents

Abstract

The invention relates to a valve repairing device and a valve repairing system. The driving shaft is in threaded connection with the fixing seat and locked on the fixing seat, the driving shaft is pushed into a patient, then the driving shaft is controlled to move axially, the clamping structure is driven to spread and hold the valve leaflet, then the driving shaft is controlled to move reversely along the axial direction of the fixing seat, the clamping structure is folded to enable the valve leaflet to be closed, and the driving shaft is in threaded connection with the fixing seat again and locked on the fixing seat, so that the mitral valve is properly closed. The uninterrupted locking function is realized through the threaded connection of the fixing seat and the driving shaft, and the structure is simple and the operation is simple.

Description

Valve repair device and valve repair system

Technical Field

The invention relates to the technical field of medical equipment, in particular to a valve repair device and a valve repair system.

Background

With the development of socioeconomic performance and the aggravation of aging population, senile valvular diseases and valvular lesions caused by coronary heart disease and myocardial infarction are more and more common. Taking a mitral valve as an example, the heart of a human body is divided into four heart chambers of a left atrium, a left ventricle, a right atrium and a right ventricle, the two atria are respectively connected with the two ventricles, and the two ventricles are connected with two aorta. The mitral valve grows between the left atrium and the left ventricle, consists of valve leaves, valve rings, chordae tendineae and papillary muscles, plays the role of a one-way valve, and ensures that blood flow only allows unidirectional movement from the left atrium to the left ventricle. Mitral regurgitation is one of the most common mitral valve diseases, which refers to the reverse flow of blood from the left ventricle into the left atrium when the mitral valve fails to close properly during the systole phase. For the treatment of mitral regurgitation disease, mitral valve repair devices are commonly used.

The mitral valve repair device is an implantable prosthesis and generally comprises a driving rod, a driving arm, a fixed point, a clamping mechanism and a locking mechanism, wherein the fixed point is fixed, the driving rod is arranged in the middle of the fixed point in a sliding way, the driving rod slides up and down to drive the clamping mechanism to move, and the clamping mechanism clamps the valve leaves to fix the two valve leaves together so as to reduce blood reflux. Traditional mitral valve prosthetic devices, actuating lever cooperation locking mechanism realize the locking function, and its locking position is decided by the length of actuating lever, cooperation locking mechanism's setting, when needs actuating lever reach suitable position, and manual operation control locking mechanism is with actuating lever locking, and this kind of locking process often is intermittent, and locking mechanism structure is complicated moreover, complex operation.

Disclosure of Invention

Based on the above, it is necessary to provide a valve repair device and a valve repair system, which are simple in locking structure and simple and continuous in locking operation, aiming at the problems of intermittent locking process and complex locking mechanism of the traditional repair device.

The utility model provides a valve prosthetic devices, includes fixing base, drive shaft and clamping structure, the clamping structure with the fixing base rotates to be connected, the drive shaft with fixing base threaded connection, the drive shaft can be relative the fixing base reciprocates in order to drive the clamping structure is towards being close to or keep away from the direction rotation of fixing base.

In one embodiment, the fixing seat is provided with a through hole, the inner wall of the through hole is provided with a first thread, the driving shaft is provided with a second thread, the driving shaft is arranged in the through hole in a penetrating mode and can move up and down along the through hole, and the driving shaft can be locked to the fixing seat through the matching of the first thread and the second thread.

In one embodiment, the valve repair device further comprises a connecting seat, the driving shaft is connected with the connecting seat, and the driving shaft can rotate relative to the connecting seat and can be linked with the connecting seat; the clamping structure is rotationally connected with the connecting seat.

In one embodiment, the clamping structure includes a first clamping arm, a second clamping arm, a first driving arm and a second driving arm, one end of the first driving arm is rotationally connected with the connecting seat, the other end of the first driving arm is rotationally connected with the first clamping arm, one end of the second driving arm is rotationally connected with the connecting seat, the other end of the second driving arm is rotationally connected with the second clamping arm, the first clamping arm is rotationally connected with the fixing seat, and the second clamping arm is rotationally connected with the fixing seat; the second thread is arranged at the lower section of the driving shaft, or the lower section and the middle section of the driving shaft, or the whole section of the driving shaft.

In one embodiment, the clamping structure further includes a third clamping arm and a fourth clamping arm, the third clamping arm is connected with the fixing base, the fourth clamping arm is connected with the fixing base, the third clamping arm is in clamping fit with the first clamping arm, and the fourth clamping arm is in clamping fit with the second clamping arm.

In one embodiment, the clamping structure includes a first clamping arm, a second clamping arm, a first driving arm and a second driving arm, one end of the first driving arm is rotationally connected with the fixing seat, the other end of the first driving arm is rotationally connected with the first clamping arm, one end of the second driving arm is rotationally connected with the fixing seat, the other end of the second driving arm is rotationally connected with the second clamping arm, the first clamping arm is rotationally connected with the connecting seat, and the second clamping arm is rotationally connected with the connecting seat; the second thread is arranged on the upper section of the driving shaft, or the upper section and the middle section of the driving shaft, or the whole section of the driving shaft.

In one embodiment, the clamping structure further includes a third clamping arm and a fourth clamping arm, the third clamping arm is connected with the first transmission arm or the fixing base, the fourth clamping arm is connected with the second transmission arm or the fixing base, the third clamping arm is in clamping fit with the first clamping arm, and the fourth clamping arm is in clamping fit with the second clamping arm.

In one embodiment, a barb is provided on a side of the third clamping arm facing the first clamping arm, and a barb is provided on a side of the fourth clamping arm facing the second clamping arm.

In one embodiment, the length of the shaft section of the driving shaft with the second thread is L1, and the length of the first clamping arm or the second clamping arm is L2, wherein L1 is more than 0 and less than L1, and L2 is less than or equal to 2 and less than 1.

In one embodiment, the nominal diameter of the second thread is 0.2mm to 5mm.

A valve repair system comprises a valve repair device and a conveying device, wherein the conveying device comprises a driving piece, and the driving piece is detachably connected with a driving shaft.

When the valve repair device and the valve repair system are used, the driving shaft is firstly in threaded connection with the fixing seat and locked on the fixing seat, at the moment, the clamping structure is kept in a furled state, the valve repair device in the furled state is pushed to the mitral valve of a patient, then the driving shaft is controlled to rotate relative to the fixing seat, so that the driving shaft moves along the axial direction of the fixing seat, meanwhile, the clamping structure is driven to be unfolded, the clamping structure holds the valve leaflets, then the driving shaft is controlled to move reversely along the axial direction of the fixing seat, meanwhile, the clamping structure is driven to furl, the valve leaflets on two sides are folded under the action of the clamping structure, and the driving shaft is in threaded connection with the fixing seat again and locked on the fixing seat, so that the mitral valve is properly closed, and blood is prevented from reversely flowing into a left atrium from the left ventricle. The driving shaft is locked through the threaded connection of the fixing seat and the driving shaft, the structure is simple, the locking operation is simple and continuous, and stepless locking can be realized.

Drawings

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

FIG. 2 is a schematic view of a valve repair device according to yet another embodiment of the present application;

FIG. 3 is a schematic view of a valve repair device according to another embodiment of the present application;

FIG. 4 is a schematic illustration of a heart with an un-implanted valve repair device;

fig. 5 is a schematic diagram of a heart implanted valve repair device according to an embodiment of the present application.

Reference numerals illustrate:

1. valve leaves; 10. a fixing seat; 20. a drive shaft; 210. a second thread; 30. a clamping structure; 301. a barb; 310a, a first clamping arm; 320a, a second clamping arm; 330a, a first drive arm; 340a, a second drive arm; 350a, a third clamping arm; 360a, fourth clamping arms; 310b, a first clamping arm; 320b, a second clamping arm; 330b, a first drive arm; 340b, a second drive arm; 350b, a third clamping arm; 360b, fourth clamping arms; 40. and a connecting seat.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

An embodiment of the present application provides a valve repair system including a valve repair device and a delivery device. The valve repair device is pushed into the patient by the delivery device. Alternatively, the valve repair device employs an implantable metallic material, such as titanium alloy, cobalt chrome alloy, or the like; or an implantable polymer material such as PLA or the like. An operator pushes the valve repair device from outside the patient to inside the patient through the delivery device, and for convenience of description, the following references to up and down directions refer to: the direction close to the operator is up, and the direction far from the operator is down.

Referring to fig. 1, in one embodiment, the valve repair device includes aholder 10, adrive shaft 20, and aclamping structure 30. Theclamping structure 30 is rotatably connected with thefixing base 10. Thedriving shaft 20 is screw-coupled with thefixing base 10. Theclamping structure 30 is in driving connection with thedrive shaft 20. The drivingshaft 20 can move up and down relative to the fixingbase 10 to drive the clampingstructure 30 to rotate in a direction approaching or moving away from the fixingbase 10.

Referring to fig. 4, 5, fig. 4 is a schematic illustration of a mitral valve failing to properly close during a systole phase;

fig. 5 is a schematic view of the valve repair device of the present embodiment implanted at the mitral valve of fig. 4 to close the leaflets 1. The driving shaft 20 is firstly in threaded connection with the fixing seat 10 and locked on the fixing seat 10, at the moment, the clamping structure 30 is kept in a furled state, the valve repairing device in the state is pushed to the mitral valve of a patient through the conveying device, then the driving shaft 20 is controlled to rotate relative to the fixing seat 10, so that the driving shaft 20 moves along the axial direction of the fixing seat 10, meanwhile, the clamping structure 30 is driven to rotate away from the fixing seat 10 and spread, the valve repairing device is adjusted to a proper position, the clamping structure 30 is used for supporting the valve leaflet 1, then the driving shaft 20 is controlled to reversely move along the axial direction of the fixing seat 10, meanwhile, the clamping structure 30 is driven to rotate towards the direction close to the fixing seat 10 and furled, the valve leaflet 1 at two sides is folded under the action of the clamping structure 30, the driving shaft 20 is connected with the fixing seat 10 in a threaded mode again and locked on the fixing seat 10, at the moment, the clamping structure 20 keeps in the furled state, and accordingly the mitral valve is properly closed, and blood is prevented from reversely flowing into a left atrium from the left ventricle. Compared with the traditional mode of realizing locking through the cooperation of a locking structure such as an additional locking spring plate and a locking piece and a driving rod, the embodiment can realize the stepless locking function through the threaded connection of the fixingbase 10 and the drivingshaft 20, namely, the locking can be realized at any position of the threaded connection of the fixingbase 10 and the drivingshaft 20. The driving function is realized through the drivingshaft 20, the clampingstructure 30 is driven to be opened or folded, the locking function can be realized by matching with the fixingseat 10, the structure is simple, the locking operation is continuous and uninterrupted, and the operation is simple and convenient.

Further, in an embodiment, the fixingbase 10 is provided with a through hole, the inner wall of the through hole is provided with a first thread (not shown in the figure), the drivingshaft 20 is provided with asecond thread 210, the drivingshaft 20 is disposed in the through hole in a penetrating manner and can move up and down along the through hole, the drivingshaft 20 moves up and down to drive the clampingstructure 30 to rotate, and the drivingshaft 20 can be locked on the fixingbase 10 through the cooperation of the first thread and thesecond thread 210. That is, thesecond thread 210 on the drivingshaft 20 is engaged with the first thread on the inner wall of the through hole, so that the drivingshaft 20 stays at the current position and keeps still relative to the fixedseat 10, and meanwhile, the clamping structure correspondingly keeps the current opened or folded state unchanged when the drivingshaft 20 is locked to the fixedseat 10.

When the valve repairing device is used, the drivingshaft 20 is locked on the fixingseat 10 through the matching of the first threads and thesecond threads 210, at the moment, the clampingstructure 30 is kept in a furled state, the valve repairing device in the state is pushed to the mitral valve of a patient through the conveying device, then the drivingshaft 20 is controlled to rotate relative to the first threads of the fixingseat 10 through thesecond threads 210, so that the drivingshaft 20 moves along the axial direction of the fixingseat 10, meanwhile, the clampingstructure 30 is driven to be unfolded, the valve repairing device is adjusted to a proper position, the clampingstructure 30 supports the valve leaflet 1, then the drivingshaft 20 is controlled to move reversely along the axial direction of the fixingseat 10, at the same time, the clampingstructure 30 is locked on the fixingseat 10 through the matching of the first threads and thesecond threads 210, at the moment, the mitral valve is properly closed, and blood is prevented from reversely flowing into a left atrium from the left ventricle.

Further, the delivery device comprises a drive member detachably connected to thedrive shaft 20 of the valve repair device, the drive member being adapted to control the axial movement of thedrive shaft 20 along its axis. The driving member controls the drivingshaft 20 to rotate in vitro, so that the drivingshaft 20 rises or falls along the axial direction of the driving shaft, and the drivingshaft 20 can be locked due to the fact that the driving member stops rotating due to the fact that the first thread is matched with thesecond thread 210 in the moving process of the drivingshaft 20. Optionally, the driving member and the drivingshaft 20 are detachably connected by adopting a non-threaded structure such as a shaft hole structure, a clamping jaw structure and the like, so that the drivingshaft 20 is prevented from moving again when the driving member is released or withdrawn from the driving member in the process of controlling the drivingshaft 20 to be in linkage by the driving member; in other embodiments, the drivingshaft 20 and the driving member are detachably connected by a thread structure with different specifications from the first thread and thesecond thread 210, so that the drivingshaft 20 can be quickly assembled and separated, and misoperation on the drivingshaft 20 is avoided.

Referring to fig. 1 and 2, in one embodiment, the valve repair device further comprises a connectingseat 40, wherein the drivingshaft 20 is connected to the connectingseat 40, and the drivingshaft 20 can rotate relative to the connectingseat 40 and can be linked with the connectingseat 40. Linkage means that theconnection seat 40 moves up and down in synchronization with the driving shaft 2. The clampingstructure 30 is rotatably connected to thedrive shaft 20 via a connectingsocket 40. Optionally, a bearing is disposed between the connectingseat 40 and the drivingshaft 20, the drivingshaft 20 can rotate relative to the connectingseat 40 through the bearing, thesecond thread 210 of the drivingshaft 20 is not affected to rotate in cooperation with the first thread, and the drivingshaft 20 can move along the axial direction in the rotation process of the drivingshaft 20 to synchronously drive the connectingseat 40 to move, so as to drive the clampingstructure 30 to rotate to realize switching of the opened or closed state. In other embodiments, the connectingseat 40 and the drivingshaft 20 can be rotationally connected by other structures, so that the rotation of the drivingshaft 20 is satisfied, and the linkage between the drivingshaft 20 and the connectingseat 40 can be realized. Such as: an annular groove is formed in the connectingseat 40, a protrusion matched with the groove is formed on the drivingshaft 20, so that the drivingshaft 20 is clamped in the groove through the protrusion, and the protrusion can rotate in the groove in the rotating process of the drivingshaft 20. Alternatively, the connectingseat 40 is provided with a through hole, one end of the drivingshaft 20 passes through the through hole, and a protrusion is arranged at one end of the drivingshaft 20 extending out of the through hole, so that the drivingshaft 20 is limited to the connectingseat 40, and meanwhile, the drivingshaft 20 can rotate in the through hole.

Alternatively, the nominal diameter of thesecond thread 210 is 0.2mm to 5mm. Such as a nominal diameter of 1mm, 2mm, 3mm, etc. of thesecond thread 210. The first thread is the same gauge as thesecond thread 210. Parameters of thesecond thread 210 and the first thread can be adjusted according to actual requirements. Alternatively, the number of turns of the first thread is 3 to 5, so that a certain locking force is provided between the drivingshaft 20 and the fixingbase 10.

Referring to fig. 1 and 2, the clampingstructure 30 in one embodiment includes afirst clamping arm 310a, asecond clamping arm 320a, afirst transmission arm 330a, and asecond transmission arm 340a. One end of thefirst transmission arm 330a is rotationally connected with the connectingseat 40, the other end of thefirst transmission arm 330a is rotationally connected with thefirst clamping arm 310a, one end of thesecond transmission arm 340a is rotationally connected with the connectingseat 40, the other end of thesecond transmission arm 340a is rotationally connected with thesecond clamping arm 320a, thefirst clamping arm 310a is rotationally connected with the fixingseat 10, and thesecond clamping arm 320a is rotationally connected with the fixingseat 10. Thefirst transmission arm 330a and thesecond transmission arm 340a are respectively disposed at two sides of the connectingseat 40, thefirst transmission arm 330a is located at the outer side of thefirst clamping arm 310a, and thesecond transmission arm 340a is located at the outer side of thesecond clamping arm 320a. In the folded state, thefirst clamping arm 310a, thesecond clamping arm 320a, thefirst transmission arm 330a, and thesecond transmission arm 340a are respectively attached to two sides of the drivingshaft 20. The drivingshaft 20 moves downwards to drive the connectingseat 40 to move downwards, and synchronously drives thefirst transmission arm 330a and thesecond transmission arm 340a to open in a direction away from the drivingshaft 20, so as to drive thefirst clamping arm 310a and thesecond clamping arm 320a to open in a direction away from the drivingshaft 20 respectively; the drivingshaft 20 moves upwards to drive the connectingseat 40 to move upwards, and synchronously drives thefirst transmission arm 330a and thesecond transmission arm 340a to fold towards the direction approaching the drivingshaft 20, so as to drive thefirst clamping arm 310a and thesecond clamping arm 320a to fold towards the direction approaching the drivingshaft 20 respectively. Thefirst transmission arm 330a and thesecond transmission arm 340a rotate around the rotating shaft on the connectingseat 40 during the opening or closing process. Thefirst clamping arm 310a and thesecond clamping arm 320a rotate around the rotating shaft on the fixingbase 10 during the opening or closing process.

Optionally, as shown in fig. 1, the entire section of the driving shaft 20 (except the portion that cooperates with the driving member) is provided with thesecond thread 210, so that the drivingshaft 20 can be locked on the fixingbase 10 by cooperation of thesecond thread 210 and the first thread when moving axially to any position. Referring to fig. 2, in other embodiments, thesecond thread 210 is provided at a lower section of thedrive shaft 20. The fixingbase 10 is correspondingly arranged at a position close to the connectingbase 40. Alternatively, in another embodiment, thesecond threads 210 are disposed at the lower and middle sections of thedrive shaft 20. Thesecond screw 210 is provided to be engaged with the first screw of the fixingbase 10 in a region where fine control is required (e.g., near the final clamping position and at the stage of the observation state) so as to achieve fine control, and thesecond screw 210 is not provided in other regions so that the drivingshaft 20 can be rapidly moved in the axial direction, reducing the overall operation time.

Referring to fig. 1, the axial direction of the drivingshaft 20 is a first direction, and a direction perpendicular to the first direction is a second direction. In the shaft section with thesecond thread 210, the drivingshaft 20 rotates around the first direction through the cooperation of thesecond thread 210 and the first thread, so that the drivingshaft 20 synchronously moves up and down, and the drivingshaft 20 stops rotating and can be locked on the fixedseat 10; in the shaft section without thesecond screw thread 210, the drivingshaft 20 can be directly moved up and down in the first direction, increasing the moving speed and reducing the operating time. During the up and down movement of thedrive shaft 20, thedrive gripping structure 30 is rotated about the second direction away from or towards thedrive shaft 20. Thefirst transmission arm 330a and thesecond transmission arm 340a shown in fig. 1 are respectively rotatably connected with the connectingseat 40 through a rotation shaft of thevertical driving shaft 20. Thefirst clamping arm 310a and thesecond clamping arm 320a are respectively rotatably connected with the fixingbase 10 through a rotating shaft of thevertical driving shaft 20. One ends of thefirst transmission arm 330a and thesecond transmission arm 340a, which are far away from the connectingseat 40, are respectively connected with the outer sides of thefirst clamping arm 310a and thesecond clamping arm 320a in a rotating way through a rotating shaft of thevertical driving shaft 20.

Further, referring to fig. 1 and 2, the clampingstructure 30 further includes athird clamping arm 350a and afourth clamping arm 360a, thethird clamping arm 350a is connected to the fixingbase 10, thefourth clamping arm 360a is connected to the fixingbase 10, thethird clamping arm 350a is engaged with thefirst clamping arm 310a, and thefourth clamping arm 360a is engaged with thesecond clamping arm 320a. Thethird clamping arm 350a and thefourth clamping arm 360a may be made of a memory material and fixed on the fixing base, or thethird clamping arm 350a and thefourth clamping arm 360a are respectively connected with the fixingbase 10 through torsion springs and rotating shafts. In a natural state, thethird clamp arm 350a is pressed against thefirst clamp arm 310a, and thefourth clamp arm 360a is pressed against thesecond clamp arm 320a. Thethird clamping arm 350a and thefourth clamping arm 360a are controlled through an external operation wire, a control hole is formed in one end, close to the upper section of the drivingshaft 20, of thethird clamping arm 350a and thefourth clamping arm 360a, the operation wire penetrates through the control hole, in the pushing process, the operation wire controls thethird clamping arm 350a and thefourth clamping arm 360a to be close to the drivingshaft 20, after pushing in place, the operation wire is loosened, thethird clamping arm 350a presses thefirst clamping arm 310a, thethird clamping arm 350a and thefirst clamping arm 310a are matched to clamp the leaflet 1 on one side, thefourth clamping arm 360a presses thesecond clamping arm 320a, thefourth clamping arm 360a and thesecond clamping arm 320a are matched to clamp the leaflet 1 on the other side, the drivingshaft 20 is controlled to move upwards, thethird clamping arm 350a, thefirst clamping arm 310a and the leaflet 1 clamped by thefourth clamping arm 320a and the leaflet 1 between the fourth clamping arm and the fourth clamping arm are rotated towards the direction close to the drivingshaft 20, and thus the two leaflets 1 are matched together, and the purpose of backflow of blood is avoided. Wherein thefirst clamping arm 310a, thesecond clamping arm 320a are positioned in the ventricle to hold the valve leaflet 1, and thethird clamping arm 350a and thefourth clamping arm 360a are positioned in the atrium to hold the valve leaflet 1.

Further, referring to fig. 1 and 2, the side of thethird clamping arm 350a facing thefirst clamping arm 310a is provided with abarb 301, and the side of thefourth clamping arm 360a facing thesecond clamping arm 320a is provided with abarb 301. The clamping force between thethird clamping arm 350a and thefirst clamping arm 310a and thefourth clamping arm 360a and thesecond clamping arm 320a is increased by thebarbs 301, so that the valve leaflet 1 is prevented from sliding out.

Referring to fig. 3, in another embodiment, the clampingstructure 30 includes afirst clamping arm 310b, asecond clamping arm 320b, afirst transmission arm 330b, and asecond transmission arm 340b. One end of thefirst transmission arm 330b is rotationally connected with the fixingseat 10, the other end of thefirst transmission arm 330b is rotationally connected with thefirst clamping arm 310b, one end of thesecond transmission arm 340b is rotationally connected with the fixingseat 10, the other end of thesecond transmission arm 340b is rotationally connected with thesecond clamping arm 320b, thefirst clamping arm 310b is rotationally connected with the connectingseat 40, and thesecond clamping arm 320b is rotationally connected with the connectingseat 40. Thefirst clamping arm 310b and thesecond clamping arm 320b are respectively disposed at two sides of the connectingseat 40, thefirst transmission arm 330b is located at the inner side of thefirst clamping arm 310b, and thesecond transmission arm 340b is located at the inner side of thesecond clamping arm 320b. In the folded state, thefirst clamping arm 310b, thesecond clamping arm 320b, thefirst transmission arm 330b, and thesecond transmission arm 340b are respectively attached to two sides of the drivingshaft 20. The drivingshaft 20 moves upwards to drive the connectingseat 40 to move upwards, and synchronously drives thefirst transmission arm 330b and thesecond transmission arm 340b to open in a direction away from the drivingshaft 20, so as to drive thefirst clamping arm 310b and thesecond clamping arm 320b to open in a direction away from the drivingshaft 20 respectively; the drivingshaft 20 moves downwards to drive the connectingseat 40 to move downwards, and synchronously drives thefirst transmission arm 330a and thesecond transmission arm 340a to fold towards the direction approaching the drivingshaft 20, so as to drive thefirst clamping arm 310b and thesecond clamping arm 320b to fold towards the direction approaching the drivingshaft 20 respectively. Thefirst transmission arm 330b and thesecond transmission arm 340b rotate around the rotating shaft on the fixingbase 10 during the opening or closing process. Thefirst clamping arm 310b and thesecond clamping arm 320b rotate around the rotating shaft on the connectingseat 40 during the opening or closing process.

Referring to fig. 3, the fixingbase 10 of the present embodiment is shown to be disposed at a position away from theconnection base 40. Correspondingly, the upper section of the drivingshaft 20 is provided with asecond thread 210 or the upper section and the middle section of the drivingshaft 20 are provided with asecond thread 210. Thesecond screw 210 is provided to be engaged with the first screw of the fixingbase 10 in a region where fine control is required (e.g., near the final clamping position and at the stage of the observation state) so as to achieve fine control, and thesecond screw 210 is not provided in other regions so that the drivingshaft 20 can be rapidly moved in the axial direction, reducing the overall operation time. In other embodiments, thesecond thread 210 may be provided on the entire section of the driving shaft 20 (except for the portion that mates with the driving member), so that the drivingshaft 20 can be locked to the fixingbase 10 by thesecond thread 210 mating with the first thread when moving axially to any position.

Referring to fig. 3, the axial direction of the drivingshaft 20 is a first direction, and a direction perpendicular to the first direction is a second direction. In the shaft section with thesecond thread 210, the drivingshaft 20 rotates around the first direction through the cooperation of thesecond thread 210 and the first thread, so that the drivingshaft 20 synchronously moves up and down, and the drivingshaft 20 stops rotating and can be locked on the fixedseat 10; in the shaft section without thesecond screw thread 210, the drivingshaft 20 can be directly moved up and down in the first direction, increasing the moving speed and reducing the operating time. During the up and down movement of thedrive shaft 20, thedrive gripping structure 30 is rotated about the second direction away from or towards thedrive shaft 20. Thefirst transmission arm 330b and thesecond transmission arm 340b shown in fig. 3 are respectively rotatably connected to the fixingbase 10 through a rotation shaft of thevertical driving shaft 20. The first clamping arm 310 and thesecond clamping arm 320b are respectively rotatably connected with the connectingseat 10 through a rotating shaft of avertical driving shaft 20. One ends of thefirst transmission arm 330b and the second transmission arm 340ba, which are far away from the fixingbase 10, are respectively connected with the inner sides of thefirst clamping arm 310b and thesecond clamping arm 320b in a rotating way through a rotating shaft of thevertical driving shaft 20.

Further, referring to fig. 3, the clampingstructure 30 further includes athird clamping arm 350b and afourth clamping arm 360b, thethird clamping arm 350b is connected with thefirst transmission arm 330b or the fixingbase 10, thefourth clamping arm 360b is connected with thesecond transmission arm 340b or the fixingbase 10, thethird clamping arm 350b is matched with thefirst clamping arm 310b, and thefourth clamping arm 360b is matched with thesecond clamping arm 340b. Thethird clamping arm 350b and thefourth clamping arm 360b may be made of a memory material and fixedly arranged on thefirst transmission arm 330b, thesecond transmission arm 340b or the fixingbase 10, or thethird clamping arm 350b and thefourth clamping arm 360b are respectively connected with thefirst transmission arm 330b, thesecond transmission arm 340b or the fixingbase 10 through torsion springs and rotating shafts. In a natural state, thethird clamp arm 350b is pressed against thefirst clamp arm 310b, and thefourth clamp arm 360b is pressed against thesecond clamp arm 320b. The third clamping arm 350b and the fourth clamping arm 360b are controlled through an external operation wire, one end, close to the upper section of the driving shaft 20, of the third clamping arm 350b and the fourth clamping arm 360b is provided with a control hole, the operation wire penetrates through the control hole, in the pushing process, the operation wire controls the third clamping arm 350b and the fourth clamping arm 360b to be close to the driving shaft 20, after pushing in place, the operation wire is loosened, the third clamping arm 350b presses the first clamping arm 310b, the third clamping arm 350b and the first clamping arm 310b are matched to clamp the valve leaflet 1 on one side, the fourth clamping arm 360b presses the second clamping arm 320b, the fourth clamping arm 360b and the second clamping arm 320b are matched to clamp the valve leaflet 1 on the other side, the driving shaft 20 is controlled to move downwards, the third clamping arm 350b, the first clamping arm 310b and the valve leaflet 1 clamped by the fourth clamping arm 360b and the valve leaflet 1 between the fourth clamping arm and the second clamping arm are rotated towards the direction close to the driving shaft 20, and thus the two valve leaflets 1 are matched together, and the purpose of backflow of blood is avoided. Wherein thefirst clamping arm 310b and thesecond clamping arm 320b are positioned in a ventricle to hold the valve leaflet 1, and thethird clamping arm 350b and thefourth clamping arm 360b are positioned in an atrium to hold the valve leaflet 1.

Further, referring to fig. 3, the side of thethird clamping arm 350b facing thefirst clamping arm 310b is provided with abarb 301, and the side of thefourth clamping arm 360b facing thesecond clamping arm 320b is provided with abarb 301. The sliding out of the leaflet 1 is avoided by thebarbs 301 increasing the clamping force between thethird clamping arm 350b and thefirst clamping arm 310b and between thefourth clamping arm 360b and thesecond clamping arm 320b.

Optionally, in one embodiment, the length of the shaft section of thedrive shaft 20 having thesecond thread 210 is L1, and the length of the first or second clamping arm is L2,0:1 < L1:L 2.ltoreq.2:1. Such as L1 to L2 of 0.5:1, 1:1 or 1.5:1, etc.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (11)

1. The valve repairing device is characterized by comprising a fixed seat, a driving shaft and a clamping structure, wherein the clamping structure is rotationally connected with the fixed seat, the driving shaft is in threaded connection with the fixed seat, and the driving shaft can move up and down relative to the fixed seat so as to drive the clamping structure to rotate in a direction close to or far away from the fixed seat.

2. The valve repair device of claim 1, wherein the holder is provided with a through hole, a first thread is provided on an inner wall of the through hole, a second thread is provided on the driving shaft, the driving shaft is disposed in the through hole in a penetrating manner and can move up and down along the through hole, and the driving shaft can be locked to the holder through cooperation of the first thread and the second thread.

3. The valve repair device of claim 2, further comprising a connection hub, the drive shaft being connected to the connection hub, the drive shaft being rotatable relative to the connection hub and being capable of interlocking with the connection hub; the clamping structure is rotationally connected with the connecting seat.

4. The valve repair device of claim 3, wherein the clamping structure comprises a first clamping arm, a second clamping arm, a first transmission arm and a second transmission arm, wherein one end of the first transmission arm is rotatably connected with the connecting seat, the other end of the first transmission arm is rotatably connected with the first clamping arm, one end of the second transmission arm is rotatably connected with the connecting seat, the other end of the second transmission arm is rotatably connected with the second clamping arm, the first clamping arm is rotatably connected with the fixed seat, and the second clamping arm is rotatably connected with the fixed seat; the second thread is arranged at the lower section of the driving shaft, or the lower section and the middle section of the driving shaft, or the whole section of the driving shaft.

5. The valve repair device of claim 4, wherein the clamping structure further comprises a third clamping arm and a fourth clamping arm, the third clamping arm being connected to the holder, the fourth clamping arm being connected to the holder, the third clamping arm being in clamping engagement with the first clamping arm, the fourth clamping arm being in clamping engagement with the second clamping arm.

6. The valve repair device of claim 3, wherein the clamping structure comprises a first clamping arm, a second clamping arm, a first driving arm and a second driving arm, wherein one end of the first driving arm is rotatably connected with the fixed seat, the other end of the first driving arm is rotatably connected with the first clamping arm, one end of the second driving arm is rotatably connected with the fixed seat, the other end of the second driving arm is rotatably connected with the second clamping arm, the first clamping arm is rotatably connected with the connecting seat, and the second clamping arm is rotatably connected with the connecting seat; the second thread is arranged on the upper section of the driving shaft, or the upper section and the middle section of the driving shaft, or the whole section of the driving shaft.

7. The valve repair device of claim 6, wherein the clamping structure further comprises a third clamping arm connected to the first drive arm or the holder, a fourth clamping arm connected to the second drive arm or the holder, the third clamping arm in clamping engagement with the first clamping arm, and the fourth clamping arm in clamping engagement with the second clamping arm.

8. The valve repair device of claim 5 or 7, wherein a side of the third clamping arm facing the first clamping arm is provided with barbs and a side of the fourth clamping arm facing the second clamping arm is provided with barbs.

9. The valve repair device of any one of claims 2-7, wherein the length of the shaft section of the drive shaft having the second thread is L1 and the length of the first or second clamping arm is L2,0:1 < l1:l2.ltoreq.2:1.

10. The valve repair device of any one of claims 2-7, wherein the nominal diameter of the second thread is 0.2mm to 5mm.

11. A valve repair system comprising a delivery device and the valve repair device of any one of claims 1-10, the delivery device comprising a driver that is detachably connected to the drive shaft.

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