CN114176840A

CN114176840A - Valve clamping device and valve repair system

Info

Publication number: CN114176840A
Application number: CN202111590264.3A
Authority: CN
Inventors: 张军傲; 周晓军; 谢晨光; 马为
Original assignee: Beijing Lingjian Medical Technology Co ltd
Current assignee: Beijing Lingjian Medical Technology Co ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-03-15

Abstract

The invention relates to a valve clamping device and a valve repair system, wherein the valve clamping device comprises a central shaft cylinder, a sliding component, a locking mechanism and a plurality of clamping arms, wherein the inner wall of the central shaft cylinder is provided with a first internal thread; the clamping arms are wound on the periphery of the central shaft barrel; the sliding component is arranged in the central shaft cylinder in a sliding mode and is connected with the clamping arms through a pivoting mechanism, so that the clamping arms slide axially according to the sliding component to rotate; the locking mechanism comprises a control member and a locking sleeve, the locking sleeve is rotatably sleeved outside the sliding member, a first external thread matched with the first internal thread is arranged on the outer wall of the locking sleeve, the control member is connected with the locking sleeve and can drive the locking sleeve to rotate, and therefore the locking sleeve is connected with the central shaft barrel under the working condition that the locking sleeve is kept connected with the sliding member. The locking sleeve and the central shaft cylinder cannot be abraded after the valve clamping device is locked, the threaded connection mode is stable and reliable, and the problem of poor reliability of the valve clamping device is solved.

Description

Valve clamping device and valve repair system

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a valve clamping device and a valve repair system.

Background

The heart valve refers to a valve between an atrium and a ventricle or between the ventricle and an artery, wherein an atrioventricular valve comprises a mitral valve and a tricuspid valve, the mitral valve is a two-piece valve which is attached to the periphery of an atrioventricular opening of a left atrium and is connected with papillary muscles through chordae tendineae, the function of preventing blood in the left ventricle from flowing back to the left atrium is realized, mitral regurgitation is a series of pathophysiological changes caused by poor anastomosis of anterior and posterior leaflets of the mitral valve due to organic or functional changes of mitral valve leaflets and related structures, and blood flow can flow back from the left ventricle to the left atrium during the mitral valve regurgitation.

Surgical valve repair or replacement is considered as a standard treatment method for the diseases, however, the surgical operation has the defects of large trauma, obvious postoperative pain, slow recovery, high risk and the like, in recent years, interventional therapy for heart valve diseases is rapidly developed due to the advantages of small trauma, relative safety, good curative effect and the like, wherein a valve repair method developed according to the technical principle of surgical valve edge-to-edge sewing is high in safety, simple in technical principle and high in feasibility, and in the operation process, a valve repair system needs to be separated after clamping arms of a valve clamp are locked, so that the valve clamp is retained in a patient body.

In the related art, a locking mechanism of the valve clamping device comprises a limiting frame, a baffle and an arched elastic sheet, wherein the arched elastic sheet is abutted against the baffle in a locking state and applies force to the baffle to enable the baffle to incline and clamp a sliding component; when unlocking, an operator needs to pull the baffle plate to enable the baffle plate to restore the horizontal state, and the sliding component is not clamped any more. However, since the shutter is in contact with the sliding member for a long time, the sliding member is likely to be worn, and there is a risk of failure of the lock, and thus the conventional valve clip has poor reliability.

Disclosure of Invention

The object of the present invention is to at least solve the problem of poor reliability of valve claspers. The purpose is realized by the following technical scheme:

the present invention proposes, in a first aspect, a valve clip comprising:

the inner wall of the central shaft cylinder is provided with a first internal thread;

the clamping arms are wound on the periphery of the central shaft barrel;

the sliding member is arranged in the central shaft barrel in a sliding mode and is connected with the clamping arms through a pivoting mechanism, so that the clamping arms can rotate according to the axial sliding of the sliding member;

the locking mechanism comprises a control member and a locking sleeve, the locking sleeve is rotatably sleeved outside the sliding member, a first external thread matched with the first internal thread is arranged on the outer wall of the locking sleeve, the control member is connected with the locking sleeve and can drive the locking sleeve to rotate, and therefore the locking sleeve is connected with the central shaft cylinder under the working condition that the sliding member is kept connected.

The valve clamping device provided by the embodiment of the invention has the following advantages:

according to the valve clamping device provided by the embodiment of the invention, the locking sleeve is always in rotating connection with the sliding component, when the clamping arms are clamped and need to be locked, an operator can utilize the control component to control the locking sleeve to rotate so that the locking sleeve extends into the central shaft cylinder and is in threaded connection with the central shaft cylinder, and at the moment, the locking sleeve is simultaneously connected with the sliding component and the central shaft cylinder, so that the sliding component can be limited to slide along the axial direction, and the clamping arms cannot rotate.

In addition, the valve clamping device provided by the embodiment of the invention can also have the following technical characteristics:

in some embodiments of the present invention, the outer wall of the sliding member is provided with a second external thread, and the inner wall of the locking sleeve is provided with a second internal thread which is matched with the second external thread, and the axial length of the second external thread is greater than that of the second internal thread.

In some embodiments of the invention, the control member is shaped as a cylinder, the control member being rotatably disposed between the central shaft cylinder and the slide member, the distal side of the control member being connected to the locking sleeve.

In some embodiments of the present invention, the proximal end portion of the locking sleeve is recessed with at least one limiting groove, and the control member is provided with a limiting protrusion, which is inserted into the limiting groove.

In some embodiments of the present invention, two limiting grooves are provided, and the two limiting grooves are symmetrically disposed on two sides of the central hole of the locking sleeve and are respectively communicated with the central hole.

In some embodiments of the present invention, the depth of the limiting groove is smaller than the length of the locking sleeve, and the second internal thread is provided on a section of the central hole between the bottom surface of the limiting groove and the distal end surface of the locking sleeve.

In some embodiments of the present invention, the stopper protrusion is provided in two, and the two stopper protrusions are symmetrical with respect to the axis of the control member.

In some embodiments of the invention, the control member is provided as a shape memory alloy tube, and/or the restraining protrusion is integrally formed on the control member.

In some embodiments of the present invention, the pivoting mechanism includes a base and a linkage arm, the linkage arm is rotatably connected with the base and the clamping arm respectively, and the base is fixedly connected with the sliding member.

A second aspect of the invention provides a valve repair system comprising a valve binder according to any of the embodiments above, and a delivery device detachably connected to the valve binder to deliver the valve binder to a set position, the delivery device comprising an actuating member connected to a sliding member of the valve binder to actuate the sliding member to slide.

The valve repair system provided by the embodiment of the invention has the same advantages as the valve clamping device provided by any one of the embodiments, and the details are not repeated herein.

Drawings

In the following, the drawings of the embodiments will be briefly described, and those skilled in the art can also derive other drawings from them without inventive effort.

FIG. 1 is a schematic view of a valve clip (clip arm deployment) according to an embodiment of the present invention;

FIG. 2 is a schematic view of a valve clip (clip arm closed) according to an embodiment of the present invention;

FIG. 3 is a front view of a partial structure of a valve clip (with the locking sleeve not mated to the central shaft) according to an embodiment of the invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a front view of a partial structure of a valve holder (locking sleeve mated to central shaft) according to an embodiment of the invention;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5;

FIG. 7 is a schematic structural view of a control member in the valve binder device according to an embodiment of the invention;

FIG. 8 is a schematic view of a locking sleeve in a valve binder device according to an embodiment of the invention;

FIG. 9 is a front view of the locking sleeve of FIG. 8;

FIG. 10 is a cross-sectional view taken along line C-C of FIG. 9;

FIG. 11 is a schematic view of a valve repair system according to an embodiment of the present invention;

fig. 12 is a cross-sectional view of a drive member coupled to a sliding member in a valve repair system according to an embodiment of the invention.

The reference symbols in the drawings denote the following:

1000. a valve repair system;

100. a valve clamp;

10. a central shaft cylinder; 101. a first internal thread;

20. clamping arms; 201. an avoidance groove; 202. connecting lugs;

30. a sliding member; 31. a slide bar; 301. a second external thread;

40. a pivoting mechanism; 41. a base; 42. a linkage arm;

50. a locking mechanism; 51. a control member; 511. the limiting protrusion is arranged; 52. a locking sleeve; 521. a first external thread; 522. a second internal thread; 523. a limiting groove; 524. a central bore;

60. a capturing member;

710. a handle; 720. a sheath tube; 730. a bending adjusting mechanism; 740. a drive member.

Detailed Description

As described in the background art, for example, in a mitral valve repair operation, after clamping a valve, clamping arms of a valve clamp need to be locked, that is, the clamping arms are prevented from rotating and expanding, in some existing valve clamps, a mechanism for locking applies force to a baffle plate by using an arched elastic sheet, and locking is achieved by using a manner that a sliding member is clamped when the baffle plate is inclined, but since the baffle plate is clamped on an outer wall of the sliding member for a long time, the sliding member is easily abraded, so that there is a risk of locking failure. In order to solve the problems, the invention provides a valve clamping device and a valve repair system, wherein the valve clamping device is provided with a control member and a locking sleeve, when clamping of a clamping arm is completed and locking is needed, an operator can control the locking sleeve to rotate by using the control member, so that the locking sleeve is in threaded connection with a central shaft barrel and is connected with a sliding member, and therefore axial sliding of the sliding member can be limited, the rotation of the clamping arm is limited, the operation difficulty is low, the locking stability is good, and the possibility of locking failure is greatly reduced.

The terminology used herein, in connection with the appended drawings of embodiments of the invention, is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention, e.g., the terms "comprising", "including", "having", and the like, do not denote the presence of the stated features nor do they exclude the presence of other features; the terms "first", "second", and the like do not imply a sequence or order; the terms "inner", "outer", "above", "below" are used merely for convenience in describing the relationship of one feature to another feature shown in the drawings and do not indicate that they must have a particular orientation. In the field of interventional medical devices, the proximal end refers to the end closer to the operator, and the distal end refers to the end farther from the operator; the axial direction refers to a direction parallel to a line connecting the center of the distal end and the center of the proximal end of the medical device in a natural state, and in the description of the present invention, the above definition is merely for convenience of description and should not be construed as limiting the present invention.

Referring to fig. 1 to 6, in an embodiment of the first aspect of the present invention, a valve clamping device 100 is provided, the valve clamping device 100 includes a central shaft cylinder 10, a sliding member 30, a locking mechanism 50, and a plurality of clamping arms 20, an inner wall of the central shaft cylinder 10 is provided with a first internal thread 101; a plurality of clamping arms 20 are wound on the periphery of the central shaft barrel 10; the sliding member 30 is slidably arranged in the central shaft barrel 10, and the sliding member 30 is connected with the clamping arms 20 through a pivoting mechanism 40, so that the clamping arms 20 can rotate according to the axial sliding of the sliding member 30; the locking mechanism 50 comprises a control member 51 and a locking sleeve 52, the locking sleeve 52 is rotatably sleeved outside the sliding member 30, a first external thread 521 matched with the first internal thread 101 is arranged on the outer wall of the locking sleeve 52, the control member 51 is connected with the locking sleeve 52 and can drive the locking sleeve 52 to rotate, so that the locking sleeve 52 is connected with the central shaft barrel 10 under the working condition that the locking sleeve 52 is connected with the sliding member 30.

The valve clip 100 of the present embodiment can be used as a margin-to-margin repair implant in the field of interventional therapy for heart diseases, and the valve clip 100 of the present embodiment can reach a designated location through a minimally invasive access and a blood vessel through a body surface, so as to achieve repair therapy for heart valves (including but not limited to mitral valve, tricuspid valve, aortic valve, and pulmonary valve). It can be understood that, after the valve clip 100 clips the heart valve, the locking clip arms 20 are required to keep the heart valve in the clipped state so as to be left in the patient, so the valve clip 100 has a high requirement on the locking stability. In this embodiment, the clamping arm 20 can rotate along with the sliding of the sliding member 30, and when the locking sleeve 52 is not connected to the central shaft barrel 10, the sliding member 30 can slide in the axial direction to drive the clamping arm 20 to open and close freely without unlocking; after the clamping of the clamping arm 20 is completed, an operator can utilize the control member 51 to drive the locking sleeve 52 to rotate until the locking sleeve 52 is in threaded connection with the central shaft cylinder 10, so that the clamping arm 20 is limited to be unfolded by a mode of preventing the sliding member 30 from sliding, and the clamping arm 20 is locked, and the locking mode is simple and convenient to operate, does not generate abrasion to cause failure, is more stable and reliable compared with the prior art, and solves the problem of poor reliability of the valve clamping device 100.

In the valve clip 100 of the present embodiment, the sliding member 30 can slide axially to drive the clip arms 20 to rotate and open or close, and the linkage relationship between the sliding member 30 and the clip arms 20 is described in detail below with respect to the overall structure and principle of the valve clip 100. Referring to fig. 1, 3 to 6, in the present embodiment, the locking mechanism 50 includes a control member 51 and a locking sleeve 52, the locking sleeve 52 is rotatably sleeved outside the sliding member 30, that is, under the driving of the control member 51, the locking sleeve 52 can rotate on the basis of being sleeved with the sliding member 30, and can be engaged with the first internal thread 101 on the central shaft tube 10 through the first external thread 521, that is, can be threadedly connected with the central shaft tube 10, so as to be shown in fig. 6, the locking sleeve 52 simultaneously connects the central shaft tube 10 and the sliding member 30, at this time, the sliding member 30 cannot move in the axial direction, and the clamping arm 20 cannot rotate.

In the present embodiment, the center barrel 10 is provided in a cylindrical structure, and on the basis of the above-described embodiment, the first internal thread 101 is provided on the inner wall near the distal end of the center barrel 10. For example, referring to fig. 4, the first internal thread 101 may be spirally extended from the distal end surface of the central shaft cylinder 10 toward the proximal end, or may be spirally extended from a position spaced apart from the distal end surface of the central shaft cylinder 10 toward the proximal end, which is not limited in this embodiment. The locking sleeve 52 may be a cylindrical structure in this embodiment, and the axial length of the first external thread 521 may be equal to or less than the axial length of the locking sleeve 52, which is not particularly limited in this embodiment.

Further, the locking sleeve 52 may be rotatably connected to the sliding member 30 by a screw, as shown in fig. 3 and 4, in some embodiments of the present invention, the outer wall of the sliding member 30 is provided with a second external thread 301, and the inner wall of the locking sleeve 52 is provided with a second internal thread 522, so that the locking sleeve 52 sleeved on the sliding member 30 is screwed to the sliding member 30 by the second internal thread 522 matching with the second external thread 301. On the basis, the axial length of the second external thread 301 is greater than that of the second internal thread 522, so that when the locking sleeve 52 is driven by the control member 51 to rotate, the second internal thread 522 and the second external thread 301 can be always kept matched, and further, when the locking sleeve 52 is in threaded connection with the central shaft barrel 10, the locking sleeve 52 still keeps connected with the sliding member 30, and the arrangement mode ensures the locking reliability.

In the embodiment, the control member 51 is connected to the locking sleeve 52, and the operator can operate the control member 51 to rotate the locking sleeve 52. Illustratively, as shown in fig. 3 and 4, in some embodiments of the present invention, the control member 51 is provided in the shape of a cylinder, the control member 51 is rotatably provided between the center shaft cylinder 10 and the slide member 30, and the distal end side of the control member 51 is connected with the lock sleeve 52 in such a manner as to be detachably connected, whereby the control member 51 can be decoupled from evacuation when locking is completed. In an alternative embodiment, the control member 51 is threadedly coupled to the locking sleeve 52, and the thread engagement direction is opposite to the engagement direction of the first internal thread 101 and the first external thread 521; in another alternative embodiment, the distal end of the control member 51 is inserted into the locking sleeve 52, and the locking sleeve 52 can rotate with the control member 51.

In some embodiments of the present invention, the control member 51 is configured as a shape memory alloy tube, and illustratively, the control member 51 may be configured as a nitinol tube, and it will be understood that one end of the control member 51 is connected to the locking sleeve 52, and the other end extends in the proximal direction for the operator to operate and rotate, and since in the valve repair system, the delivery sheath for delivering the valve clamp 100 needs to be bent in the patient body to reach the target position along the set direction, the control member 51 is configured as a shape memory alloy tube in the present embodiment, and can be bent along with the bending of the delivery sheath, and can also be restored to the initial state according to the shape memory characteristics.

In addition to the above embodiments, taking the example that the distal end of the control member 51 is inserted into the locking sleeve 52, referring to fig. 4 and 6 to 8, in this embodiment, the locking sleeve 52 is also provided with a cylindrical structure, that is, the locking sleeve 52 has a central hole 524 that is axially disposed therethrough, and in addition, the proximal end of the locking sleeve 52 is recessed with at least one limiting groove 523, and the distal end of the control member 51 can be inserted into the limiting groove 523, so that when the control member 51 rotates, the locking sleeve 52 can rotate with the control member 51.

Further, in some embodiments of the present invention, one or more limiting grooves 523 are provided, and accordingly, the distal end of the control member 51 is provided with limiting protrusions 511, the limiting protrusions 511 are inserted into the limiting grooves 523, the number of the limiting protrusions 511 is the same as that of the limiting grooves 523, and it can be understood that the limiting grooves 523 are provided to facilitate the rotation of the locking sleeve 52 driven by the control member 51. Further, the cross-sectional shape of the restriction groove 523 may be set to a rectangular shape, an arc ring shape, a triangular shape, or the like, with a plane perpendicular to the axial direction as a cross-section, and accordingly, the cross-sectional shape of the restriction protrusion 511 is matched with the cross-sectional shape of the restriction groove 523, and when the operator operates the control member 51 to rotate, the relative rotation between the restriction protrusion 511 and the restriction groove 523 does not occur, so that the locking sleeve 52 rotates following the control member 51.

Illustratively, as shown in fig. 7, two limiting protrusions 511 are provided, and the two limiting protrusions 511 are symmetrical about the axis of the control member 51 in such a manner that the axis is symmetrical, so as to facilitate uniform stress on the locking sleeve 52 and facilitate the operator to rotate the locking sleeve 52 by using the control member 51, and in some embodiments of the present invention, the limiting protrusions 511 are integrally formed on the control member 51 in such a manner that the control member 51 is easily manufactured. On this basis, correspondingly, two limiting grooves 523 are provided, the two limiting grooves 523 are symmetrically arranged on two sides of the central hole 524 of the locking sleeve 52, in this embodiment, the limiting grooves 523 may be communicated with the central hole 524 or not communicated with the central hole 524, as shown in fig. 8, the two limiting grooves 523 are both communicated with the central hole 524 of the locking sleeve 52, and the arrangement mode of the communication is convenient for manufacturing the locking sleeve 52.

In some embodiments of the present invention, as shown in fig. 8 and 10, the depth of the limiting groove 523 is smaller than the length of the locking sleeve 52, and the length of the limiting protrusion 511 is smaller than or equal to the depth of the limiting groove 523, it can be understood that, since the inner wall of the central hole 524 of the locking sleeve 52 is further provided with the second internal thread 522 for cooperating with the sliding member 30, the depth of the limiting groove 523 is smaller than the depth of the central hole 524, that is, smaller than the length of the locking sleeve 52, and on the basis of this, the second internal thread 522 may be provided on a section of the central hole 524 between the bottom surface of the limiting groove 523 and the distal end surface of the locking sleeve 52, thereby simultaneously ensuring that the second internal thread 522 cooperates with the second external thread 301, the limiting groove 523 cooperates with the limiting protrusion 511, and the first internal thread 101 cooperates with the first external thread 521.

Referring to fig. 1 and 2, in the present embodiment, a plurality of clamping arms 20 are provided, for example, if the valve clamping device 100 is applied to a mitral valve repair treatment, the number of the clamping arms 20 may be correspondingly set to two, and if the valve clamping device 100 is applied to a tricuspid valve repair treatment, the number of the clamping arms 2020 may be correspondingly set to three. In this embodiment, the number of the sliding member 30 may be set to be one, the sliding member 30 and the two clamping arms 20 are respectively connected through the pivoting mechanism 40, and when the sliding member 30 slides in the axial direction, the pivoting mechanism 40 can drive the clamping arms 20 to rotate.

In this embodiment, the central shaft cylinder 10 is located at the middle position of the valve clamping device 100, the sliding member 30 is slidably disposed in the central shaft cylinder 10, the plurality of clamping arms 20 are wound around the periphery of the central shaft cylinder 10, one end of each clamping arm 20 is rotatably connected to the central shaft cylinder 10, and after the sliding member 30 and the clamping arms 20 are linked, the clamping arms 20 can rotate around the connection with the central shaft cylinder 10. When the slide member 30 is slid distally, the clip arms 20 rotate open, and when the slide member 30 is slid proximally, the clip arms 20 rotate closed. The central shaft tube 10 is arranged to be a tube-shaped structure, the shape of the clamping arm 20 can be arranged to be a long strip plate, for example, the clamping arm 20 can be arranged to be an arc plate, the far end of the clamping arm 20 is rotatably connected with the central shaft tube 10, the inner arc surface of the clamping arm 20 faces the central shaft tube 10, when the number of the clamping arm 20 is two, the two clamping arms 20 are symmetrically arranged on two sides of the central shaft tube 10, the two clamping arms 20 are closed and then are in an encircling state, so that the valve can be clamped conveniently, the part of the clamping arm 20 close to the far end is provided with the avoiding groove 201, the far end of the clamping arm 20 extends out to be provided with the two connecting lugs 202, the two connecting lugs 202 are respectively arranged on two sides of the avoiding groove 201, and extend to the outer side wall of the central shaft tube 10 to be connected with the central shaft tube 10, exemplarily, the connection can be rotated through the rotating shaft.

On the basis of the above embodiments, as shown in fig. 1 and 2, the pivoting mechanism 40 is connected between the sliding member 30 and the clamping arm 20, and the pivoting mechanism 40 drives the clamping arm 20 to rotate around the connection with the central shaft tube 10 according to the sliding of the sliding member 30, in some embodiments of the present invention, one end of the pivoting mechanism 40 is fixedly connected with the sliding member 30, and the other end is rotatably connected with the clamping arm 20, for example, when the sliding member 30 slides axially and distally, the pivoting mechanism 40 moves distally along with it and drives the clamping arm 20 rotatably connected with it to rotate in a direction away from the central shaft tube 10, i.e., drives the clamping arm 20 to expand; when the sliding member 30 slides axially and proximally, the pivoting mechanism 40 moves proximally, and drives the clip arms 20 connected to rotate in a direction approaching the central shaft 10, i.e., drives the clip arms 20 to close.

With continued reference to fig. 1 and 2, in some embodiments of the present invention, the pivoting mechanism 40 includes a base 41 and a linkage arm 42, the base 41 is fixedly connected to the sliding member 30, for example, in some embodiments of the present invention, the sliding member 30 extends from the distal end of the central shaft tube 10, and the base 41 can be connected to the end of the sliding member 30, so as to expand the moving range of the base 41, and thus the opening and closing range of the clamping arm 20. Further, the linkage arm 42 in the pivoting mechanism 40 is rotatably connected to the base 41 and the clamping arm 20, respectively, and when the base 41 slides along the axial direction along with the sliding member 30, the linkage arm 42 rotates between the base 41 and the clamping arm 20 to drive the clamping arm 20 to rotate, for example, one end of the linkage arm 42 away from the base 41 is rotatably connected to the middle portion of the clamping arm 20, so that the linkage arm 42 can apply a pulling force or a pushing force to the clamping arm 20 when rotating, and further drive the clamping arm 20 to rotate, thereby realizing the unfolding or the closing.

Further, in the above-described embodiment, as shown in fig. 1, 3 and 4, the sliding member 30 extends from the distal end of the central shaft tube 10, and the locking sleeve 52 is sleeved on the portion where the sliding member 30 extends in the initial state, and further, as shown in fig. 2 in combination with fig. 5 and 6, when the locking sleeve 52 is screwed on the central shaft tube 10, the locking sleeve 52 is partially located in the central shaft tube 10 and is screwed on the sliding member 30, so that the sliding member 30 is prevented from sliding in the axial direction, and the clip arms 20 are prevented from rotating.

In some embodiments of the present invention, as shown in fig. 1 and 2, the valve binder 100 further includes a catching member 60, the catching member 60 is installed between the central shaft cylinder 10 and the clamping arms 20, one side of the catching member 60 facing the clamping arms 20 is provided with a barb to catch the valve, and accordingly, the valve binder 100 further includes a control wire, such as a nylon wire, a suture or a metal wire, connected to the catching member 60, the control wire is used to drive the catching member 60 to rotate, so that the valve can be caught by the catching member 60 and then clamped by the clamping arms 20 during the process of clamping the valve by the valve binder 100, for example, the catching member 60 can be configured as a catching elastic piece formed by processing a shape memory alloy, such as nitinol, and the catching elastic piece includes a plurality of elastic pieces, such as two elastic pieces respectively located at two sides of the central shaft cylinder 10, the two elastic pieces can be configured as an integrally molded structure, and a set included angle is formed between the two, one control silk thread can be arranged to control two sub-elastic pieces simultaneously, or a plurality of control silk threads can be arranged, and each control silk thread is connected with and controls one sub-elastic piece. The embodiment is convenient for the catching component 60 to catch the valve when contacting with the valve by arranging the barb on the catching component 60, thereby improving the accuracy of clamping the subsequent clamping arms 20. Further, the central shaft tube 10 may be further provided with a mounting seat near the distal end, and the mounting seat may be welded or integrally formed on the outer wall of the central shaft tube 10 to facilitate the connection of the catching member 60.

Referring to fig. 11, the embodiment of the second aspect of the present invention provides a valve repair system 1000, the valve repair system 1000 comprises a delivery device and the valve clamp 100 according to any of the above embodiments, the delivery device is detachably connected to the valve clamp 100, and the delivery device is used for delivering the valve clamp 100 to a set position. The delivery device in this embodiment comprises a handle 710, a sheath assembly and a connecting mechanism, wherein the sheath assembly comprises a bending adjusting mechanism 730 and a plurality of sheath 720 which are sequentially sleeved, the handle 710 is connected with the sheath assembly and can control part or all of the sheath 720 in the sheath assembly to reach a set position in a patient, the bending adjusting mechanism 730 can control part or all of the sheath 720 in the sheath assembly to bend at the set position, and a control member 51 of a locking mechanism 50 in the valve clamp 100 can be connected to the handle 710, so that an operator can operate the control member 51 through the handle 710; the attachment mechanism is attached to the distal end of the innermost one of the sheaths 720 and is adapted to removably attach to the valve clip 100, whereby the valve clip 100 adjusts in position according to the bending and movement of the sheath 720 after the valve clip 100 is delivered to the set position, the attachment mechanism disengages from the valve clip 100 after the valve clip 100 has clamped and locked, and the valve clip 100 remains in the patient after the sheath assembly is withdrawn.

Further, referring to fig. 11, in some embodiments of the present invention, the delivery device includes a driving member 740, the driving member 740 is connected to the sliding member 30 to drive the sliding member 30 to slide, in this embodiment, the sliding member 30 is provided as one, and correspondingly, the driving member 740 is also provided as one, according to the above-mentioned embodiments, a channel is provided in the innermost sheath 720 of the sheath assembly, the driving member 740 is inserted into the channel, and the distal end of the driving member 740 protrudes from the distal end of the sheath 720 and then is engaged with the sliding member 30 of the valve clamp 100, so that an operator can pull or push the driving member 740 to pull or push the sliding member 30, thereby causing the sliding member 30 to slide in the axial direction.

Taking the sliding member 30 as the sliding rod 31 as an example, as shown in fig. 11, in an alternative embodiment, a blind hole is formed at one end of the sliding rod 31 close to the conveying device, an internal thread is formed in the blind hole, the driving member 740 may be specifically configured as a metal wire, such as a nitinol wire, the driving member 740 is inserted into the cylindrical control member 51, an external thread matching with the internal thread is formed on an outer wall of the driving member 740 close to the distal end, and thus the distal end of the driving member 740 is connected with the sliding member 30; the proximal end of the drive member 740 may be coupled to the handle 710, and the operator may control the movement and rotation of the drive member 740 via the handle 710. It will be appreciated that when axial movement of slide member 30 is desired, the operator can move drive member 740 via handle 710, and when the delivery device needs to be disconnected from valve clip 100, the operator can rotate drive member 740 via handle 710 to disengage the internal threads from the external threads, thereby withdrawing drive member 740.

On the basis of the above embodiments, the operation method of the valve repair system 1000 according to the present embodiment is, for example: an operator operates the handle 710 to move the sheath assembly and the valve clamping device 100 connected to the sheath 720 to a mitral valve setting position through a body surface minimally invasive access and a blood vessel according to a setting procedure, at this time, the clamping arms 20 are in a closed state, if the locking sleeve 52 is in threaded connection with the central shaft tube 10, the operator firstly rotates the control member 51 to separate the locking sleeve 52 from the central shaft tube 10, then uses the handle 710 to push the driving member 740 to move the sliding member 30 connected with the driving member 740 towards a distal end, as shown in fig. 1, the clamping arms 20 connected with the sliding member 30 through the pivoting mechanism 40 are unfolded, adjusts the position of the valve clamping device 100 to align with a part of the mitral valve to be clamped, uses the handle 710 to pull the driving member 740 to move the sliding member 30 towards a proximal end, so that the clamping arms 20 close and clamp the valve, then rotates the control member 51, as shown in fig. 5 and fig. 6, the locking sleeve 52 is moved towards a proximal end, gradually rotates into the central shaft cylinder 10, at this time, the second internal thread 522 of the locking sleeve 52 is matched with the second external thread 301 on the sliding member 30, the first external thread 521 of the locking sleeve 52 is matched with the first internal thread 101 of the central shaft cylinder 10, the sliding member 30 cannot move, namely, locking is realized, finally, the driving member 740 and the sliding member 30 are separated, the connecting mechanism and the valve clamp 100 are separated, the driving member 740 and the sheath tube assembly are withdrawn, and the valve clamp 100 is left in the patient body in a state of clamping the valve.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A valve clip, comprising:

the clamping arms are wound on the periphery of the central shaft barrel;

2. The valve binder of claim 1, wherein an outer wall of the sliding member is provided with a second external thread, and an inner wall of the locking sleeve is provided with a second internal thread that mates with the second external thread, the second external thread having an axial length that is greater than an axial length of the second internal thread.

3. The valve binder of claim 2, wherein the control member is shaped as a cylinder, the control member being rotatably disposed between the central shaft cylinder and the sliding member, a distal side of the control member being connected to the locking sleeve.

4. The valve clip of claim 3, wherein the proximal end of the locking sleeve is recessed with at least one retaining groove, and the control member is provided with a retaining protrusion, the retaining protrusion being inserted in the retaining groove.

5. The valve clip of claim 4, wherein the two limiting grooves are symmetrically arranged on two sides of the central hole of the locking sleeve and are respectively communicated with the central hole.

6. The valve binder of claim 5, wherein the depth of the retaining groove is less than the length of the locking sleeve, and the second internal thread is provided on a section of the central bore between a bottom surface of the retaining groove and a distal surface of the locking sleeve.

7. The valve binder of claim 5, wherein there are two of the stop protrusions, both of the stop protrusions being symmetric about the axis of the control member.

8. The valve clip of claim 7 wherein the control member is provided as a shape memory alloy tube and/or the stop protrusion is integrally formed on the control member.

9. The valve binder of any one of claims 1 to 8, wherein the pivoting mechanism comprises a base and a linkage arm, the linkage arm being rotatably connected to the base and the clamp arm, respectively, the base being fixedly connected to the sliding member.

10. A valve repair system, comprising:

a valve binder according to any one of claims 1 to 9;

the delivery device is detachably connected with the valve clamping device so as to deliver the valve clamping device to a set position, and the delivery device comprises a driving member which is connected with a sliding member of the valve clamping device so as to drive the sliding member to slide.