CN114569288A - Valve clamping device and valve repair system - Google Patents

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 plurality of clamping arms and a plurality of elastic components, the plurality of clamping arms are wound on the periphery of the central shaft cylinder, and the distal end parts of the clamping arms are rotatably connected to the central shaft cylinder; the sliding component is arranged in the central shaft cylinder in an axial sliding mode, and the sliding component partially extends out of the far end of the central shaft cylinder; the proximal end portion of elastic component and arm lock swing joint, elastic component set to exert the power of pointing to the central shaft section of thick bamboo to the arm lock under the operating mode of not receiving external force, and the distal end portion of elastic component is connected with the sliding member, and the elastic component sets up to produce motion and deformation along with the slip of sliding member in order to drive the arm lock and rotate. The elastic component in the valve clamping device can apply force pointing to the central shaft cylinder to the clamping arm under the condition of no external force, so that the clamping arm is pressed to be kept in a closed state, the clamping arm can be actively locked, and the operation efficiency is improved.

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.

However, the surgical operation has the defects of large trauma, obvious postoperative pain, slow recovery, high risk and the like, in recent years, the interventional therapy of the valvular heart disease 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 edge-to-edge suturing of a surgical valve has high safety, simple technical principle and high feasibility, and in the operation process, a valve repair system needs to be dissociated after clamping arms of a valve clamping device are locked, so that the valve clamping device is retained in a patient body. In the related art, the valve clamping device cannot be actively locked, a plurality of parts are required to be independently arranged for locking, but the structure that the plurality of parts are combined for locking not only causes the volume of the valve clamping device to be overlarge, but also has complicated locking steps, and the operation efficiency is influenced.

Disclosure of Invention

The invention aims to at least solve the problem that the valve clamping device cannot be locked actively. The purpose is realized by the following technical scheme:

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

a central shaft cylinder;

the clamping arms are wound on the periphery of the central shaft barrel, and the distal end parts of the clamping arms are rotatably connected to the central shaft barrel;

a slide member slidably disposed in the central shaft in an axial direction, the slide member partially protruding from a distal end of the central shaft;

the elastic members are arranged to apply force pointing to the central shaft cylinder to the clamping arms under the working condition that the elastic members are not subjected to external force, the distal ends of the elastic members are connected with the sliding members, and the elastic members are arranged to move and/or deform along with the sliding of the sliding members so as to drive the clamping arms to rotate.

According to the valve clamping device provided by the embodiment of the invention, as the elastic component has the preloaded elastic force, the force pointing to the central shaft cylinder can be applied to the clamping arm under the condition of no external force, so that the clamping arm is pressed to keep a closed state, the clamping arm can be actively locked, an operator does not need to perform a locking step independently, the operation difficulty is reduced, and the operation efficiency is further improved; and this embodiment can not only drive the arm lock and rotate through setting up the elastic component, can also realize the auto-lock, need not to add locking mechanism to reduce the volume and the quality of valve clamping ware, improved the operation success rate. In addition, because a locking mechanism is not required to be additionally arranged, the axial size of the clamping arm of the valve clamping device can be increased, so that the contact area with the valve can be further increased, namely, the clamping area is increased, and the clamping effect is further improved.

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 invention, the valve clamp further comprises a pulling member and a capturing member, the capturing member has a movable section and a fixed section, the movable section is provided with capturing teeth on one side facing the fixed section, the movable section is connected with the pulling member, and the fixed section is connected with the clamping arms.

In some embodiments of the present invention, the clamping arm is provided with a first avoiding hole, the fixed section penetrates through the first avoiding hole and is connected to a side of the clamping arm away from the central shaft tube, and the movable section is located on a side of the clamping arm facing the central shaft tube.

In some embodiments of the present invention, at least one second avoiding hole is disposed on the clamping arm, and the catching tooth can be inserted into the second avoiding hole.

In some embodiments of the invention, the catch member has a preloaded closing force, and the movable segment is parallel to the fixed segment in the absence of an external force.

In some embodiments of the present invention, the shape of the elastic member is an arc protruding in a direction away from the central shaft cylinder, or a bending portion protruding in a direction away from the central shaft cylinder is provided on the elastic member.

In some embodiments of the present invention, the distal end portion of the sliding member is provided with a slider, the elastic member is provided as a U-shaped memory alloy wire, the arc end of the U-shaped memory alloy wire is connected with the clamping arm, and the open end of the U-shaped memory alloy wire is connected with the slider.

In some embodiments of the present invention, a connection hole is formed through the clamping arm, and the U-shaped memory alloy wire is inserted through the connection hole to be rotatably connected to the clamping arm.

In some embodiments of the present invention, the proximal end of the central shaft cylinder is provided with a flange, and in a condition that the clamping arms are closed, at least one of the proximal end of the elastic member and the proximal end of the clamping arms and the flange can clamp a valve therebetween.

In some embodiments of the present invention, in the condition that the clamping arms are closed, the plane perpendicular to the axial direction is taken as a cross section, and the cross section of the clamping arms is configured to be arc-shaped.

In some embodiments of the present invention, the number of the clamping arms is two, and in a condition that the clamping arms are closed, the valve can be clamped between the opposite edges of the two clamping arms.

A second aspect of the invention provides a valve repair system comprising:

the valve clamp provided by any one of the embodiments above, and a delivery device detachably connected to the valve clamp to deliver the valve clamp to a set position, wherein the delivery device comprises at least one driving member connected to a sliding member of the valve clamp to drive 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 are briefly described, and those skilled in the art can obtain other drawings without inventive effort.

FIG. 1 is a first schematic structural view of a valve clamp according to an embodiment of the present invention;

FIG. 2 is a front view of the valve binder shown in FIG. 1;

FIG. 3 is a left side view of the valve binder shown in FIG. 1;

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

FIG. 5 is a second schematic structural view of a valve binder according to an embodiment of the invention;

FIG. 6 is a third schematic structural view of a valve binder according to an embodiment of the invention;

FIG. 7 is a front view of the valve binder shown in FIG. 6;

FIG. 8 is a bottom view of the valve binder shown in FIG. 6;

FIG. 9 is a first schematic view of a capture member of the valve holder according to an embodiment of the present invention;

FIG. 10 is a second schematic structural view of a capture member of the valve binder of the present invention;

FIG. 11 is another front view of a valve binder device according to an embodiment of the invention;

FIG. 12 is a schematic structural view of a valve repair system according to an embodiment of the present invention;

fig. 13 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; 11. a mounting seat; 101. a flange;

20. clamping arms; 201. a first avoidance hole; 202. connecting lugs; 203. a second avoidance hole; 204. connecting holes; 205. an edge;

30. a sliding member;

40. a slider;

50. an elastic member; 501. a bending part; 51. a U-shaped memory alloy wire; 511. an arc end; 512. an open end;

60. a capturing member; 61. an active segment; 611. catching teeth; 62. a fixed section;

70. a pulling member;

810. a handle; 820. a sheath tube; 830. a bending adjusting mechanism; 840. a drive member.

Detailed Description

The terminology used herein, in connection with the appended drawings in the examples 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" and "having" do not indicate the presence of the stated features nor 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 5, 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 10, a sliding member 30, a plurality of clamping arms 20 and a plurality of elastic members 50, the plurality of clamping arms 20 are wound around the periphery of the central shaft 10, and distal end portions of the clamping arms 20 are rotatably connected to the central shaft 10; the sliding component 30 is arranged in the central shaft barrel 10 in an axial sliding way, and the sliding component 30 partially extends out of the far end of the central shaft barrel 10; the proximal end of the elastic member 50 is movably connected to the clamping arm 20, the elastic member 50 is configured to apply a force to the clamping arm 20, which is directed to the central shaft tube 10, when the elastic member 50 is not subjected to an external force, the distal end of the elastic member 50 is connected to the sliding member 30, and the elastic member 50 is configured to move and/or deform with the sliding of the sliding member 30 to rotate the clamping arm 20.

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).

In this embodiment, the elastic member 50 has a preload elastic force, and can apply a force pointing to the central shaft cylinder 10, i.e. a force along the closing direction of the clamping arm 20, to the clamping arm 20 in an initial state, so as to press the clamping arm 20 to keep the closed state, when an operator controls the sliding member 30 to slide, the elastic member 50 can rotate or deform, or deform while rotating, so as to drive the clamping arm 20 connected thereto to rotate and open, and further clamp a valve by using the clamping arm 20; after the valve clamping device 100 finishes clamping, the elastic member 50 can rotate and deform along with the sliding of the sliding member 30, and the shape of the elastic member 50 can maintain and press the clamping arm 20 after being restored to the initial state, so that the clamping arm 20 is kept in a closed state, and therefore the elastic member 50 can actively lock the clamping arm 20, an operator does not need to perform a locking step independently, the operation difficulty is reduced, and the operation efficiency is further improved. In addition, it can be understood that, because the valve clamping device 100 needs to be implanted inside the heart of the patient, especially in the way of minimally invasive access through the body surface and vessel introduction, the volume of the valve clamping device 100 is strictly limited, in this embodiment, the elastic member 50 is arranged in the valve clamping device 100, which not only can drive the clamping arms 20 to rotate, but also can realize self-locking, and no locking mechanism needs to be added, thereby reducing the volume and the mass of the valve clamping device 100, and improving the success rate of the operation. In addition, under the condition of the same axial dimension, because a locking mechanism is not arranged, the axial dimension of the clamping arms 20 of the valve clamping device 100 can be increased, so that the contact area with the valve can be further increased, namely the clamping area is increased, and the clamping effect is further improved.

Referring to fig. 2, 4 and 5, in the present embodiment, the central shaft cylinder 10 is located at a central position of the valve clamping device 100, the central shaft cylinder 10 is used for connecting the clamping arms 20 and providing a sliding channel for the sliding member 30, for example, the central shaft cylinder 10 may be configured as a cylinder, a cavity is formed in the central shaft cylinder 10, the sliding member 30 can slide in the cavity along the axial direction, a plurality of clamping arms 20 are connected to an outer wall of the central shaft cylinder 10, and particularly, the distal ends of the clamping arms 20 are rotatably connected to the central shaft cylinder 10 in various manners, such as being hinged or connected through a rotating shaft, which is not limited in this embodiment. Further, as shown in fig. 5, the distal end of the central shaft tube 10 may be provided with a mounting seat 11 along the circumferential direction, in this embodiment, the mounting seat 11 may be integrally formed on the central shaft tube 10, and the end of the clamping arm 20 may be connected to the mounting seat 11, so that not only is the assembly convenient, but also the reliability of the connection between the clamping arm 20 and the central shaft tube 10 is improved. As shown in fig. 1 and 2, taking two clamping arms 20 as an example, in an alternative embodiment, two engaging lugs 202 may be extended from the distal end of each clamping arm 20, and the two engaging lugs 202 extend to two sides of the central shaft tube 10 and are connected with the mounting seat 11 on the central shaft tube 10 through a rotating shaft.

Further, in the present embodiment, the distal end of the elastic member 50 is connected to the sliding member 30, and the proximal end of the elastic member 50 is movably connected to the clamping arm 20, so that when the sliding member 30 slides in the axial direction, the elastic member 50 is driven to move, and the elastic member 50 applies a pulling force or a pushing force to the clamping arm 20, thereby driving the clamping arm 20 to rotate and open or close. Illustratively, in the valve clamping device 100 according to the present embodiment, when the operator operates the sliding member 30 to slide distally, the elastic member 50 and the clamping arms 20 are driven to rotate until the clamping arms 20 are opened, so that the valve is located between the central shaft cylinder 10 and the clamping arms 20, and the operator operates the sliding member 30 to slide proximally, the elastic member 50 and the clamping arms 20 are driven to rotate until the clamping arms 20 are closed, so that the valve is clamped between the central shaft cylinder 10 and the clamping arms 20.

Further, with continuing reference to fig. 4 and 5 in combination with fig. 9 and 10, in some embodiments of the present invention, the valve clip 100 further includes a capturing member 60 and a pulling member 70, the pulling member 70 is connected to the capturing member 60, the pulling member 70 is used for being pulled by an operator to move the capturing member 60, and the pulling member 70 can be configured as a non-metal wire or a metal wire; the catching member 60 may be disposed between the clamping arms 20 and the central shaft cylinder 10 for catching the valve, so as to improve the accuracy and stability of the valve clamping device 100 in clamping the valve. In an alternative embodiment, as shown in fig. 4, 9 and 10, the catching member 60 has a movable section 61 and a fixed section 62, wherein the movable section 61 is connected with the pulling member 70 and the fixed section 62 is connected with the clamping arm 20. It will be appreciated that the capturing member 60 can be pre-formed with a pre-loaded closing force, whereby the fixed section 62 is fixed relative to the clamping arms 20, and the movable section 61 can be moved under the pulling of the pulling member 70, i.e. the movable section 61 can be rotated relative to the fixed section 62, thereby capturing the valve, so that the valve is captured between the movable section 61 and the fixed section 62, i.e. the valve is captured between the movable section 61 and the clamping arms 20.

Further, as shown in fig. 4, 9 and 10, in the present embodiment, a side of the movable section 61 facing the fixed section 62 is provided with a catching tooth 611, the catching tooth 611 may be provided with a plurality of barb structures, for example, may be provided as a plurality of barb structures integrally formed on the catching member 60, for example, the movable section 61 and the fixed section 62 are provided as an integrally formed structure and have a preloaded closing force, for example, the catching member 60 may be provided as a memory alloy sheet, and is bent through a preforming process to form the connected movable section 61 and the fixed section 62, and the catching tooth 611 on the movable section 61. In the use process of the valve clamping device 100, the initial state of the catching member 60 is the closed state, when the valve is located between the clamping arms 20 and the central shaft cylinder 10, an operator can pull the movable section 61 of the catching member 60 through the pulling member 70, control the position of the catching teeth 611 by using the rotation of the movable section 61, so that the catching teeth 611 are embedded into the valve, and then close the clamping arms 20 to complete the valve clamping.

Further, referring to fig. 3 and fig. 4, the movable section 61 is located on a side of the clamping arm 20 facing the central shaft cylinder 10 and can move between the clamping arm 20 and the central shaft cylinder 10, and the fixed section 62 is connected to the clamping arm 20, in this embodiment, the fixed section 62 is connected to the clamping arm 20 in various ways, for example, the fixed section 62 may be connected to a side of the clamping arm 20 facing the central shaft cylinder 10, that is, an inner side of the clamping arm 20, or connected to a side of the clamping arm 20 away from the central shaft cylinder 10, that is, an outer side of the clamping arm 20. Illustratively, in an alternative embodiment, a first avoiding hole 201 is formed in the clamping arm 20, the fixing section 62 penetrates through the first avoiding hole 201 and is connected to a side of the clamping arm 20 away from the central shaft cylinder 10, the first avoiding hole 201 is close to a distal end of the clamping arm 20, as shown in fig. 2 and 3, when the distal end of the clamping arm 20 is provided with two engaging lugs 202, the first avoiding hole 201 may be provided as a notch located between the two engaging lugs 202, the fixing section 62 extends out of the clamping arm 20 from the notch and can be attached to an outer surface of the clamping arm 20, and the fixing section 62 is connected to the clamping arm 20 by welding, riveting, or the like.

In an alternative embodiment, a welding post is protruded from a side of the fixed section 62 facing the movable section 61, and correspondingly, a hole matched with the welding post is formed in the clamping arm 20, and the welding post is matched with the hole during assembly, and the fixed section 62 is further connected with the clamping arm 20 by welding, so that the connection reliability is improved on the basis of saving radial space. In the embodiment, the fixing section 62 of the catching member 60 is arranged outside the clamping arm 20, so that the space between the clamping arm 20 and the central shaft cylinder 10 is saved, and the overall radial size of the valve clamping device 100 is reduced; moreover, in this embodiment, the extending direction of the connecting portion between the fixed section 62 and the movable section 61 is exactly overlapped with the thickness direction of the clamping arm 20, so that the space is fully utilized, the structure is more compact, and therefore, the size of the valve clamping device 100 is further reduced, and the valve clamping device 100 is conveniently implanted.

On the basis of the above embodiment, as shown in fig. 4 and 8, the clamping arm 20 is provided with at least one second avoiding hole 203, and the catching tooth 611 can be inserted into the second avoiding hole 203, it can be understood that the movable section 61 and the fixed section 62 of the catching member 60 can rotate relatively, when the fixed section 62 is connected to the clamping arm 20, the movable section 61 can move close to or away from the clamping arm 20, and the catching tooth 611 provided on the movable section 61 faces the clamping arm 20, so that the embodiment can prevent the catching tooth 611 from interfering with or wearing the clamping arm 20 by providing the second avoiding hole 203 on the clamping arm 20, and further reduce the overall radial dimension of the valve clamp 100, thereby facilitating the implantation thereof. The number of the second avoidance holes 203 may be one or more in this embodiment, and the number of the second avoidance holes 203 is set according to the number and the positions of the catching teeth 611, which is not particularly limited in this embodiment.

Further, on the basis of the above embodiments, as shown in fig. 4 and 9, the capturing member 60 has a preloaded closing force under a working condition without an external force, and the movable section 61 is parallel to the fixed section 62, so that the fixed section 62 is attached to and connected with the clamping arm 20, and the movable section 61 is parallel to or nearly parallel to the clamping arm 20, such an arrangement manner can not only ensure that the capturing teeth 611 on the movable section 61 are smoothly matched with the second avoiding holes 203 on the clamping arm 20, reduce the radial dimension of the valve clamp 100, but also ensure that the valve located between the clamping arm 20 and the movable section 61 is firmly clamped after the clamping arm 20 is closed, i.e., ensure the reliability of clamping.

Referring to fig. 1 and fig. 2, in the valve clamping device 100 of the present embodiment, one end of the elastic member 50 is connected to the sliding member 30, and the other end is connected to the clamping arms 20, the number of the elastic members 50 is equal to the number of the clamping arms 20, and each elastic member 50 drives one clamping arm 20 to open and close. Illustratively, when the clamping arms 20 are in the closed state, the elastic members 50 are correspondingly in the closed state, and can apply a pushing force to the clamping arms 20 directed to the central shaft barrel 10, preventing the clamping arms 20 from opening; referring to fig. 5 to 8, when the sliding member 30 slides, the elastic member 50 is driven to move, and the elastic member 50 is gradually opened, or is gradually opened and then gradually closed, and the clamping arm 20 is continuously pulled to gradually open the clamping arm 20, in which process the elastic member 50 applies a pulling force to the clamping arm 20 until the clamping arm 20 is opened to a set maximum angle, as shown in fig. 6 and 7, the maximum angle is greater than 180 °; when the clamping arms 20 are required to be closed after the valve is successfully captured, the sliding member 30 drives the elastic member 50 to move, so that the elastic member 50 is gradually closed, or the elastic member is gradually opened to a maximum angle and then gradually closed, and continuously pushes the clamping arms 20 to gradually close the clamping arms 20, in the process, the elastic member 50 applies a thrust to the clamping arms 20, so that the clamping arms 20 are finally restored to an initial closed state, and the elastic member 50 has elasticity in the state and continuously presses the clamping arms 20 to prevent the clamping arms 20 from being opened, so that the valve clamping is completed.

On the basis of the above embodiment, the connection manner between the elastic member 50 and the sliding member 30 may be welding, the shape of the sliding member 30 is configured to be rod-shaped, the sliding member 30 is slidably disposed in the central shaft tube 10, and the distal end of the sliding member 30 can extend out of the central shaft tube 10, as shown in fig. 5 and 6, in an alternative embodiment, the distal end of the sliding member 30 is provided with the slider 40, and the slider 40 is located outside the central shaft tube 10, so that the distal end of the elastic member 50 can be connected to the slider 40, specifically, can be configured to be welding, to ensure the reliability of the connection. When the sliding member 30 slides, the sliding block 40 moves along the axial direction, and the elastic member 50 is driven to move.

Further, the elastic member 50 can be disposed in various ways, for example, the elastic member 50 can be a sheet-shaped, rod-shaped or other elastic member, such as a memory alloy, in some embodiments of the present invention, as shown in fig. 5 to 7, the elastic member 50 is shaped as an arc protruding away from the central shaft tube 10, such as an arc sheet, or, as shown in fig. 1 to 4, the elastic member 50 is provided with a bending portion 501 protruding away from the central shaft tube 10, the bending portion 501 can be configured as an arc bend, in this embodiment, the elastic member 50 can be pre-formed with a pre-loaded elastic force, so that when the clamping arms 20 and the elastic member 50 are in the closed state, the proximal ends of the elastic member 50 press the clamping arms 20 inward, so as to keep the clamping arms 20 in the closed state.

In some embodiments of the present invention, the elastic member 50 is a U-shaped memory alloy wire 51, for example, a U-shaped nitinol wire, and based on the above embodiments, as shown in fig. 5 to 7, both ends of the U-shaped memory alloy wire 51 are respectively an arc end 511 and an open end 512, and between the arc end 511 and the open end 512, the shape of the U-shaped memory alloy wire 51 is set to be an arc shape protruding in a direction away from the central shaft tube 10, or as shown in fig. 1 to 4, the U-shaped memory alloy wire 51 is provided with a bending portion 501 protruding in a direction away from the central shaft tube 10. It is understood that the U-shaped memory alloy wire 51 includes two connected alloy wires, the two alloy wires are equal in length and are simultaneously arranged in an arc shape or have a bending portion 501. On the basis, the arc end 511 of the U-shaped memory alloy wire 51 is connected with the clamping arm 20, the open end 512 of the U-shaped memory alloy wire 51 is connected with the slider 40, for example, a mounting hole may be provided on the slider 40, two ends of the open end 512 of the U-shaped memory alloy wire 51 extend into the mounting hole to be connected with the slider 40, and the connection reliability may be further improved by welding.

Further, as shown in fig. 2 and 3, in some embodiments of the present invention, a connection hole 204 is formed through the clamping arm 20, a direction of the connection hole 204 is the same as a thickness direction of the clamping arm 20, and the U-shaped memory alloy wire 51 is inserted into the connection hole 204 and rotatably connected to the clamping arm 20. In an alternative embodiment, as shown in fig. 2, each of the clamping arms 20 is provided with two connecting holes 204, and during the assembling process, two ends of the open end 512 of the U-shaped memory alloy wire 51 can extend out of the clamping arm 20 from the inner side of the clamping arm 20 through the two connecting holes 204 respectively until the arc end 511 of the U-shaped memory alloy wire 51 abuts against the inner side of the clamping arm 20; in another alternative embodiment, as shown in fig. 11, each of the clamping arms 20 is provided with four connecting holes 204, and during the assembly process, two ends of the open end 512 of the U-shaped memory alloy wire 51 can extend from the outer side of the clamping arm 20 to the inner side of the clamping arm 20 through two connecting holes 204 near the proximal end, and then extend from the inner side of the clamping arm 20 to the outer side of the clamping arm 20 through the other two connecting holes 204.

In this embodiment, the clamping arms 20 are driven by the elastic member 50 to rotate around the connection with the central shaft cylinder 10, the shape of the clamping arms 20 has various arrangement modes, for example, the clamping arms 20 can be arranged in a rectangular sheet shape or an arc sheet shape, in some embodiments of the present invention, under the condition that the clamping arms 20 are closed, a plane perpendicular to the axial direction is taken as a cross section, and the cross section of the clamping arms 20 is in an arc shape, when the valve clamp 100 provided in this embodiment is used, a valve can be clamped between the central shaft cylinder 10 and the clamping arms 20, the arc-shaped clamping arms 20 can increase the contact area with the valve, so as to improve the clamping effect, and at the same time, an accommodating space can be formed inside the clamping arms 20 to accommodate the capturing member 60 and the central shaft cylinder 10.

With continued reference to fig. 1 to 5, in some embodiments of the present invention, the number of the clamping arms 20 is two, the two clamping arms 20 are symmetrical about the central shaft barrel 10, and in a condition that the clamping arms 20 are closed, the valve can be clamped between the opposite edges of the two clamping arms 20, it can be understood that, as shown in fig. 2, each clamping arm 20 has two edges 205, and the opposite edges 205 of the two clamping arms 20 can contact or form a gap and can clamp the valve between the two edges 205, thereby further improving the clamping effect on the valve.

Further, as shown in fig. 2 and 4, in some embodiments of the present invention, the proximal end portion of the central shaft cylinder 10 is provided with a flange 101, and a cross section of the flange 101 is a plane perpendicular to the axial direction, and a cross-sectional shape of the flange 101 may be a circle, a rectangle, or an irregular shape, which is not particularly limited in this embodiment. In an alternative embodiment, two opposite side walls of the flange 101 are respectively provided as a plane or an arc, and in a condition that the clamping arms 20 are closed, the valve can be clamped between the flange 101 and at least one of the proximal end portions of the elastic member 50 and the proximal end portions of the clamping arms 20, that is, the proximal end portion of the elastic member 50 (for example, the arc end 511 of the U-shaped memory alloy wire 51) contacts the flange 101 or forms a gap smaller than the thickness of the valve, so that the valve can be clamped; alternatively, the proximal ends of the clamping arms 20 contact the flange 101 or form a gap smaller than the thickness of the valve, so as to be able to clamp the valve; still alternatively, the proximal end portions of the elastic member 50 (e.g., the arc end 511 of the U-shaped memory alloy wire 51) and the clamping arms 20 respectively contact the flange 101 or form a gap smaller than the thickness of the valve, so that the valve can be clamped, thereby further improving the clamping effect on the valve.

Referring to fig. 12, an 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 the embodiment of the first aspect, the delivery device is detachably connected with the valve clamp 100 to deliver the valve clamp 100 to a set position, the delivery device comprises at least one driving member 840, and the driving member 840 is connected with the sliding member 30 of the valve clamp 100 to drive the sliding member 30 to slide. As shown in fig. 13, taking the sliding member 30 as a rod-shaped example, the proximal end of the sliding member 30 may be provided with a blind hole, an internal thread is provided in the blind hole, the driving member 840 may be specifically provided with a wire, and the outer wall of the driving member 840 near the distal end is provided with an external thread matching the internal thread, so that the distal end of the driving member 840 is connected with the sliding member 30.

As shown in fig. 12, the delivery device in this embodiment may include a handle 810, a sheath assembly and a connection mechanism, wherein the sheath assembly includes a bending adjustment mechanism 830 and a plurality of sheaths 820 sequentially sleeved, the handle 810 is connected to the sheath assembly and can control part or all of the sheaths 820 in the sheath assembly to reach a set position in the patient, the bending adjustment mechanism 830 can control part or all of the sheaths 820 in the sheath assembly to bend at the set position, and the pulling member 70 of the capturing mechanism in the valve clamp 100 may be connected to the handle 810, so as to facilitate the operator to operate the capturing member 60 through the handle 810; the attachment mechanism is attached to the distal end of the innermost one of the sheaths 820 and is removably attached to the valve clip 100, whereby, after the valve clip 100 is delivered to the set position, the valve clip 100 adjusts in position according to the bending and movement of the sheath 820, and after the valve clip 100 clamps and locks, the attachment mechanism disengages from the valve clip 100, leaving the valve clip 100 in the patient. On the basis of the above embodiment, the detachable connection between the connection mechanism and the valve clamping device 100 can be realized by buckling the tenon-and-mortise structure.

The operation of the valve repair system 1000 according to the present embodiment will be described in detail below, and the following embodiment will be described by taking the example that the valve clip 100 includes two clip arms 20.

An operator operates the handle 810 to move the sheath assembly and the valve clip 100 connected to the sheath 820 to a mitral valve setting position through a minimally invasive body surface entrance and a blood vessel according to a setting procedure, and first pushes the driving member 840 by using the handle 810, as shown in fig. 5 and 6, so that the sliding member 30 of the valve clip 100 moves towards the distal end to drive the elastic member 50 connected thereto to rotate and deform, and further the clip arms 20 are gradually opened under the pulling of the elastic member 50; the handle 810 is used for pulling the pulling member 70, the movable section 61 of the catching member 60 is rotated to be close to the central shaft cylinder 10, when the valve is in the set position, the pulling member 70 is released, the catching teeth 611 on the movable section 61 are embedded into the valve to finish catching, finally, the handle 810 is used for pulling the driving member 840, the sliding member 30 is moved towards the proximal end, the elastic member 50 is driven to be restored to the initial closed state, and the two clamping arms 20 are gradually closed and clamped on the valve under the pushing of the elastic member 50. Finally, the driving member 840 and the sliding member 30 are detached, the connecting mechanism and the valve clip 100 are detached, and the driving member 840 and the sheath assembly are withdrawn, so that the valve clip 100 is left in the patient 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 (12)

1. A valve clip, comprising:

a central shaft cylinder;

the clamping arms are wound on the periphery of the central shaft barrel, and the distal end parts of the clamping arms are rotatably connected to the central shaft barrel;

a slide member slidably disposed in the central shaft in an axial direction, the slide member partially protruding from a distal end of the central shaft;

the elastic members are arranged to apply force pointing to the central shaft cylinder to the clamping arms under the working condition that the elastic members are not subjected to external force, the distal ends of the elastic members are connected with the sliding members, and the elastic members are arranged to move and/or deform along with the sliding of the sliding members so as to drive the clamping arms to rotate.

2. The valve binder of claim 1, further comprising a pulling member and a capturing member, the capturing member having a movable section and a fixed section, a side of the movable section facing the fixed section being provided with capturing teeth, the movable section being connected with the pulling member, and the fixed section being connected with the clamping arms.

3. The valve clamping device according to claim 2, wherein a first avoiding hole is formed in the clamping arm, the fixing section penetrates out of the first avoiding hole and is connected to one side of the clamping arm, which is far away from the central shaft tube, and the movable section is located on one side of the clamping arm, which is far towards the central shaft tube.

4. The valve binder of claim 2, wherein the clip arm is provided with at least one second relief hole, and the catching teeth are insertable into the second relief hole.

5. The valve binder of any one of claims 2 to 4, wherein the capturing member has a preloaded closing force, and the movable segment is parallel to the fixed segment in the absence of an external force.

6. The valve binder of claim 1, wherein the resilient member is shaped as an arc protruding away from the central shaft or has a bend protruding away from the central shaft.

7. The valve clip according to claim 1 or 6, wherein the distal end of the sliding member is provided with a slider, the elastic member is provided with a U-shaped memory alloy wire, the arc end of the U-shaped memory alloy wire is connected with the clamping arm, and the open end of the U-shaped memory alloy wire is connected with the slider.

8. The valve clamping device according to claim 7, wherein a connecting hole is arranged on the clamping arm in a penetrating manner, and the U-shaped memory alloy wire is arranged in the connecting hole in a penetrating manner to be connected with the clamping arm in a rotating manner.

9. The valve binder of claim 1, wherein the proximal end of the central shaft barrel is provided with a flange, and wherein at least one of the proximal end of the resilient member and the proximal end of the clamping arms and the flange are capable of clamping a valve therebetween when the clamping arms are closed.

10. The valve clip according to claim 1, wherein in the closed condition of the clip arms, the clip arms are provided with an arc-shaped cross section, and the cross section is a plane perpendicular to the axial direction.

11. The valve binder of claim 10, wherein the number of the clamping arms is two, and the valve can be clamped between the opposite edges of the two clamping arms under the condition that the clamping arms are closed.

12. A valve repair system, comprising:

a valve binder according to any one of claims 1 to 11;

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 at least one driving member which is connected with a sliding member of the valve clamping device so as to drive the sliding member to slide.

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