CN219594901U - Valve clip delivery device and valve clip system - Google Patents

Abstract

The utility model provides a valve clip conveying device and a valve clip system, wherein the valve clip conveying device comprises a moving component, an intermediate wire and a shell, the shell comprises an inner cavity, the moving component comprises a moving part, the distal end of the moving part is arranged in the inner cavity of the shell, the moving part can move relative to the shell along the axial direction of the intermediate wire, the moving part is used for driving the valve clip to do opening and closing movement by driving the intermediate wire to axially move, the moving part comprises at least one first mark, the shell comprises an observation channel and at least one second mark, the observation channel is used for observing the first mark, and the second mark is arranged at the periphery of the observation channel and is used for being matched with the first mark to display the opening and closing degree of the valve clip. The valve clip conveying device is convenient for doctors to observe the opening and closing conditions of the valve clips during operation, so that the doctors can know the opening and closing angles of the valve clips during operation, and the safety and the efficiency of the operation are improved.

Description

Valve clip delivery device and valve clip system

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a conveying device of a valve clip and a valve clip system.

Background

The mitral valve is a two-piece valve leaflet attached to the periphery of the left atrioventricular orifice, which is attached to the papillary muscles by chordae tendineae, and serves to prevent blood from the left ventricle from flowing back into the left atrium. Mitral regurgitation is a series of pathophysiological changes caused by poor anterior and posterior She Wenge of the mitral valve due to organic or functional changes in the mitral valve leaflets and their associated structures, and the regurgitation of blood flow from the left ventricle to the left atrium. For example: during systole, a portion of the left ventricle's blood regurgites to the left atrium through the mitral valve orifice, which is not closed. The left atrium receives blood from the left ventricular regurgitation and pulmonary vein infusion simultaneously, the left atrium blood volume increases substantially, the pressure increases, and the left atrium becomes hypertrophic. In diastole, more blood flows from the left atrium to the left ventricle, so that the left ventricle is hypertrophic due to the reinforcement of contraction, heart failure occurs in both the left atrium and the left ventricle after the evolution from the compensation period to the decompensation period, and pulmonary congestion, pulmonary arterial hypertension, right ventricular hypertrophy, right atrial hypertrophy, right heart failure and systemic congestion occur in sequence.

Along with the development of technology, domestic and foreign instrument manufacturers develop a batch of interventional clamping instruments for treating mitral valve or tricuspid valve regurgitation and corresponding delivery systems. By taking mitral regurgitation treatment as an example, the conveying system can puncture the clamping device through the atrial septum by the femoral vein puncture of the catheter, convey the clamping device from the left atrium to the vicinity of the mitral valve downwards, and drive the clamping device to clamp and fix the free edges of the front and rear valve leaflets of the mitral valve, so that the clamping device can complete the repair process in a mode of establishing a tissue bridge, and the phenomenon of mitral regurgitation is reduced.

Existing delivery systems suffer from the following disadvantages: the existing gripper conveying system is time-consuming because a doctor needs to observe the opening angle of the gripping apparatus through diagnostic equipment such as CT, X-ray and radiography when driving the gripping apparatus to grip the free edges of the anterior and posterior valve leaflets of the mitral valve.

Disclosure of Invention

An object of an embodiment of the present utility model is to provide a delivery device for a valve clip and a valve clip system, which solve one or more of the technical problems in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a first aspect of the present utility model provides a delivery device for a valve clip, comprising:

a moving assembly, an intermediate wire, and a housing;

the housing includes an inner cavity;

the moving assembly comprises a moving part, the distal end of the moving part is arranged in the inner cavity of the shell, the moving part can move relative to the shell along the axial direction, and the moving part is used for driving the valve clip to open and close by driving the intermediate wire to move along the axial direction;

the moving member includes at least one first mark;

the housing includes a viewing channel for viewing the first indicia and at least one second indicia disposed about the viewing channel for cooperating with the first indicia to display the degree of opening and closing of the valve clip.

In an embodiment, the moving assembly further comprises a driving member for driving the moving member to axially move, and the driving member is in threaded connection with the moving member;

the driving member is configured to be rotatable only with respect to the housing, and the moving member is configured to be movable only axially with respect to the housing.

In one embodiment, the proximal end of the housing is further provided with a proximal opening that tapers inwardly to form an opening shoulder;

the distal end of the driver is provided with a circumferentially extending open recess, and the open shoulder is received in the open recess such that the driver is constrained to rotate only relative to the housing.

In an embodiment, the outer side of the distal end of the moving member is provided with a first restriction member, and the housing is provided with a second restriction member, the first and second restriction members being configured for moving connection such that the moving member is restricted to move axially only with respect to the housing.

In an embodiment, the distal end of the moving member is further provided with a boss, and the first mark is disposed on the boss.

In an embodiment, the first mark and the second mark are one or more of text, symbols, graphics, and patterns.

In an embodiment, the housing further comprises a viewing window protruding from a surface of the housing, the viewing window being provided with a magnifying lens to magnify the first marking and/or the second marking.

In an embodiment, the valve clamp further comprises a wire clamping assembly, wherein the wire clamping assembly is rotatably accommodated in the moving assembly and fixedly connected with the intermediate wire, so that the intermediate wire is detachably connected with the valve clamp in a autorotation mode.

In one embodiment, the wire clamping assembly comprises a rotating shaft and a handle positioned at the proximal end of the rotating shaft, the handle having a central cavity for receiving the intermediate wire, the rotating shaft having a receiving cavity for receiving the intermediate wire, the central cavity and the receiving cavity being in communication; the handle is coupled with the rotational shaft to secure the intermediate wire.

In one embodiment, the wire clamping assembly further comprises a unidirectional rotating member located between the moving member and the rotating shaft, the unidirectional rotating member being configured to rotate the wire clamping assembly in a first direction and to prevent rotation of the wire clamping assembly in a second direction, the first direction and the second direction being opposite.

In one embodiment, the wire clamping assembly further comprises a locating pin;

the moving part is provided with a first positioning through groove, the outer wall of the rotating shaft is provided with a second positioning through groove, and the first positioning through groove and the second positioning through groove after being matched form a positioning through hole;

the locating pin penetrates through the locating through hole so as to prevent relative movement between the moving piece and the rotating shaft.

A second aspect of the utility model provides a valve clip system comprising a delivery device for a valve clip as described above and a valve clip.

In one embodiment, the valve clip includes a central base detachably connected to the distal end of the valve clip delivery device, a clip arm and a clip arm link connected to the central base, the clip arm and the clip arm link being rotatable about an axis of the central base to grip or release a valve.

In one embodiment, the brake assembly further comprises a brake assembly, wherein the clamp arm comprises a first clamp arm and a second clamp arm, the brake assembly comprises a first connecting rod, a second connecting rod and a base, one end of the first connecting rod is rotatably connected with the first clamp arm, and the other end of the first connecting rod is rotatably connected with the base; the base comprises a horizontal portion and a vertical portion, two ends of the horizontal portion are respectively connected with the first connecting rod and the second connecting rod, the vertical portion is movably accommodated in the central base, and the far end of the intermediate wire penetrates through the central base and is detachably connected with the vertical portion.

The utility model provides a valve clip conveying device, which comprises a moving assembly, an intermediate wire and a shell, wherein the shell comprises an inner cavity, the moving assembly comprises a moving part, the distal end of the moving part is arranged in the inner cavity of the shell, the moving part can move relative to the shell along the axial direction, the moving part is used for driving the valve clip to do opening and closing movement by driving the intermediate wire to move along the axial direction, the moving part comprises at least one first mark, the shell comprises an observation channel and at least one second mark, the observation channel is used for observing the first mark, and the second mark is arranged at the periphery of the observation channel and is used for being matched with the first mark to display the opening and closing degree of the valve clip. The conveying device of the valve clip is convenient for doctors to observe the opening and closing conditions of the valve clip during operation, so that the doctors can know the opening and closing angles of the valve clip during operation, and the safety and efficiency of the operation are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a delivery device for a mitral valve clip according to one embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a mitral valve clip according to one embodiment of the present utility model;

FIG. 4 is a schematic view of a partial cross-sectional configuration of a delivery device for a mitral valve clip according to one embodiment of the present utility model;

fig. 5 is a schematic diagram of a moving member in a conveying device according to an embodiment of the utility model;

FIG. 6 is a schematic view of a wire assembly of a delivery device for a valve clip according to an embodiment of the present utility model;

FIG. 7 is an enlarged view of a portion of FIG. 1;

FIG. 8a is a schematic view of a mitral valve clip according to an embodiment of the present utility model with a clip arm closed;

fig. 8b is a schematic view of a mitral valve clip according to an embodiment of the present utility model with arms deployed.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

In the present utility model, 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 utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

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 one or more such feature. It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. Some embodiments of the utility model provide a valve clip delivery device comprising: a moving assembly, an intermediate wire, and a housing; the housing includes an inner cavity; the moving assembly comprises a moving part, the distal end of the moving part is arranged in the inner cavity of the shell, the moving part can move relative to the shell along the axial direction, and the moving part is used for driving the valve clip to open and close by driving the intermediate wire to move along the axial direction; the moving member includes at least one first mark; the housing includes a viewing channel for viewing the first indicia and at least one second indicia disposed about the viewing channel for cooperating with the first indicia to display the degree of opening and closing of the valve clip.

The valve clip conveying device provided by the embodiment of the utility model is convenient for doctors to know the opening and closing conditions of the valve clip by observing the first mark at the proximal end of the conveying device during operation, so that the doctors are reduced or prevented from being exposed to dangerous environments such as X-rays, and the safety and the efficiency of the operation are improved.

The valve clip delivery device and the valve clip system provided by the utility model are described in detail below in connection with a valve clip system for treating mitral regurgitation as a delivery device 1 for a mitral valve clip as a mitral valve clip 2, and as a mitral valve clip system comprising a mitral valve clip 2 and a delivery device 1. But this does not limit the scope of the utility model. The valve clip may also be other instruments for treating other valve disorders using similar edge-to-edge techniques, such as tricuspid clips for treating tricuspid regurgitation, and accordingly, the valve clip delivery device is a delivery device for a tricuspid clip.

In embodiments of the present utility model, "proximal" refers to the end that is closer to the operator, farther from the patient; accordingly, "distal" refers to the end that is closer to the patient, farther from the operator.

Fig. 1 is a schematic structural view of a delivery device for a mitral valve clip according to the present embodiment, fig. 2 is a schematic sectional structural view of fig. 1, fig. 3 is a schematic structural view of a mitral valve clip according to the present embodiment, and fig. 4 is a schematic sectional structural view of a portion of a delivery device for a mitral valve clip according to the present embodiment.

Referring to fig. 1-4, the valve clip system provided in this embodiment is a mitral valve clip system for treating mitral regurgitation, and includes a delivery device 1 for a mitral valve clip and a mitral valve clip 2.

The delivery device for a valve clip of the present embodiment is a delivery device 1 for a mitral valve clip, and comprises a moving assembly 11, an intermediate wire 12 and a housing 13; the housing 13 includes an inner cavity 133; the moving assembly 11 comprises a moving member 111, a distal end of the moving member 111 is arranged in an inner cavity 133 of the housing 13, the moving member 111 can move relative to the housing 13 along the axial direction of the intermediate wire 12, and the moving member 111 is used for driving the valve clip to make opening and closing movement by driving the intermediate wire 12 to move axially; the mover 111 includes at least one first marking 1111; the housing 13 comprises a viewing channel 131 for viewing the first marker 1111 and at least one second marker 132, the second marker 132 being arranged at the periphery of the viewing channel 131 for cooperating with the first marker 1111 to show the degree of opening and closing of the mitral valve clip 2.

When the delivery device of the valve clip system of the present embodiment is applied to a mitral valve regurgitation operation, an operator observes the matching relationship between the first mark 1111 and the second mark 132 through the observation channel 131 on the housing 13 to know the opening and closing degree of the mitral valve clip 2. The conveying device for the mitral valve clamp is convenient for doctors to know the opening and closing conditions of the mitral valve clamp 2 without diagnostic equipment such as X-rays during operation, so that the doctors are reduced or prevented from being exposed in dangerous environments such as X-rays, and the safety and the efficiency of the operation are improved.

Referring to fig. 3, 8a and 8b, the mitral valve clip 2 of the present embodiment includes a central base 21, a clip arm 23, and a clip arm link 24. Wherein the clamping arm 23 and the clamping arm connecting rod 24 can respectively perform opening and closing movements around the axis of the central base 21 so as to clamp or release the valve leaflet 3 of the mitral valve. Preferably, the clamp arm 23 of the valve clamp system of the present embodiment comprises a first clamp arm 231 and a second clamp arm 232, the first clamp arm 231 and the second clamp arm 232 being symmetrically arranged about the axis of the central base 21. Accordingly, the arm links 24 of the valve clip system of the present embodiment include a first arm link 241 for cooperating with the first arm 231 to clamp one leaflet in the mitral valve and a second arm link 242 for cooperating with the second arm 232 to clamp the other leaflet in the mitral valve. In this embodiment, a detachable connection is used between the central base 21 and the distal end of the delivery device. This embodiment is not limited to a specific implementation. For example, in the specification and drawings of the chinese patent document CN102395331B, various coupling modes and the like are shown in the related characters in the specification.

Further, the mitral valve clamp 2 further comprises a brake assembly 22, wherein the brake assembly 22 is used for driving the clamping arm 23 to open and close around the central base 21 under the driving of the axial movement of the intermediate wire 12.

With continued reference to fig. 8a and 8b, the brake assembly 22 of the present embodiment includes a first link 221, a second link 222, and a base 223, wherein one end of the first link 221 is rotatably connected to the first clamping arm 231, and the other end is rotatably connected to the base 223; one end of the second link 222 is rotatably connected with the second clamping arm 232, the other end is rotatably connected with the base 223, the base 223 comprises a horizontal portion and a vertical portion, both ends of the horizontal portion are respectively connected with the first link 221 and the second link 222, and the vertical portion is accommodated in the central base 21 and can move relative to the central base 21.

Specifically, the center base 21 of the present embodiment is a hollow structure. The base 223 of the present embodiment is T-shaped, and two ends of the horizontal portion of the base are connected to the first link 221 and the second link 222, respectively, and the vertical end is accommodated in the center base 21 and can be movably connected to the center base 21. The distal end of the intermediate wire 12 is inserted through the central base 21 and is detachably connected to the vertical portion of the base 223. For example, the first link 221, the second link 222, the first clamping arm 231, the second clamping arm 232, the base 223, and the central base 21 form a link structure in a pin connection manner, and the first clamping arm 231 and the second clamping arm 232 rotate under the acting force of the central base 21 to clamp the edge of the leaflet.

With continued reference to fig. 1-4, in this embodiment the housing 13 of the delivery device 1 has an inner cavity 133, the distal end of the housing 13 is provided with a distal opening 134, the proximal end of the housing 13 is provided with a proximal opening 135, and the inner cavity 133 extends axially towards both ends and communicates with the proximal opening 135 and the distal opening 134, respectively. The intermediate wire 12 enters the lumen 133 from the proximal opening 135 and exits from the distal opening 134 and extends to the distal end of the delivery device. The size and material of the housing 13 are not particularly limited in this embodiment. The intermediate wire 12 of this embodiment may be a wire, such as a nickel titanium or stainless steel material. The distal end of the intermediate wire 12 is provided with an external thread and correspondingly the vertical part of the base 223 is provided with an internal thread matching the external thread, by means of which the removable connection of the intermediate wire 12 and the mitral valve clip 2 is achieved. Of course in other alternative embodiments, internal threads may be provided at the distal end of the intermediate wire 12, while the vertical end of the central base 21 is provided with mating external threads. Alternatively, the distal end of the intermediate wire 12 may have other coupling structures for enabling a detachable connection with the mitral valve clamp 2 by movement of the intermediate wire 12. As described above, when the intermediate wire 12 is driven to move axially, the base 223 moves axially accordingly, and the open/close movement of the clip arm 23 is achieved by the first link 221, the second link 222, and the center base 21.

In this embodiment, the intermediate wire 12 is driven to move axially by the moving assembly 11. Fig. 5 is a schematic view of a moving member in a delivery device for a mitral valve according to an embodiment of the present utility model.

Referring to fig. 3-5, the moving assembly 11 includes a moving member 111, a distal end of the moving member 111 is disposed in an inner cavity 133 of the housing 13, the moving member 111 is axially movable relative to the housing 13, and the moving member 111 is configured to drive the mitral valve clip 2 to perform an opening and closing motion by driving the intermediate wire 12 to axially move. The manner in which the moving member 111 is driven to perform axial movement is not particularly limited in this embodiment.

Further, the moving assembly 11 further includes a driving member 112 for driving the moving member 111 to move axially, and the driving member 112 is screwed with the moving member 111, the driving member 112 is configured to rotate only relative to the housing 13, and the moving member 111 is configured to move only axially relative to the housing 13.

Illustratively, in the present embodiment, the moving member 111 is in the shape of a screw, and the driving member 112 is in the shape of a nut. Wherein the driving member 112 is configured to be rotatable with respect to the housing 13, but is restrained from axial movement with respect to the housing 13 along the axis of the housing 13, and the moving member 111 is configured to be axially movable with respect to the housing 13 along the axis of the housing 13, but is restrained from rotation with respect to the housing 13. Illustratively, the driving member 112 is sleeved on the moving member 111, at least the distal end of the moving member 111 is provided with external threads, and the driving member 112 is provided with internal threads, which form a threaded connection. The distal end of the driver 112 is provided with a circumferentially arranged open recess, the proximal end of the housing 13 is provided with a proximal opening, the proximal opening is retracted to form an open shoulder, and the open shoulder of the proximal opening is received in the recess. In this way, the driving member 112 can rotate relative to the housing 13 without being axially movable along the axis of the housing 13.

On the other hand, the distal end of the moving member 111 enters the inside of the housing 13 through the proximal end opening, and the distal outer side of the moving member 111 is provided with a first restriction member. Correspondingly, the housing 13 is provided with a second limiting member, and the first limiting member and the second limiting member are configured to be movably connected, so that the moving member 111 can move axially along the axis of the housing 13 relative to the housing 13 and cannot rotate relative to the housing 13. Illustratively, the first limiting member is a limiting protrusion, the second limiting member is an axially arranged limiting groove, and one end of the limiting protrusion is fixed on the periphery of the moving member 111, and the other end of the limiting protrusion is accommodated in the limiting groove. In this way, the moving member 111 can move axially relative to the housing 13 without rotating relative to the housing 13. In an alternative embodiment, the first limiting member is an axially arranged limiting groove, the second limiting member is a limiting protrusion, one end of the limiting protrusion is fixed on the periphery of the housing 13, and the other end of the limiting protrusion is accommodated in the limiting groove.

Referring to fig. 1 and 4, the conveying device 1 further includes a wire clamping assembly 113, where the wire clamping assembly 113 is rotatably accommodated in the moving assembly 11 and fixedly connected with the intermediate wire 12. In this manner, the wire clamping assembly 113 may drive the intermediate wire 12 to rotate, so as to enable the intermediate wire 12 to be detachably connected with the mitral valve clip 2 in a rotating manner. Preferably, the wire clamping assembly 113 is restrained from axial movement relative to the moving member 111. Specifically, the wire clamping assembly 113 is fixedly connected to the proximal end of the intermediate wire 12, and the moving member 111 has an axially penetrating channel, and the wire clamping assembly 113 is at least partially rotatably accommodated in the channel, so as to realize detachable connection between the intermediate wire 12 and the mitral valve clamp 2 by driving the intermediate wire 12 to rotate.

Further, referring to fig. 4 and 6, the wire clamping assembly 113 includes a rotation shaft 1131 and a handle 1132 positioned proximal to the rotation shaft 1131. The handle 1132 includes a proximal handle end for rotation by an operator to operate the wire clamping assembly 113 and a distal first coupling end for coupling with the rotational shaft 1131 and clamping the intermediate wire 12. The handle 1132 has a lumen for receiving the proximal end of the intermediate wire 12. The rotation shaft 1131 is substantially cylindrical. The proximal end of the rotation shaft 1131 has a second coupling end for coupling with the first coupling end to fix the intermediate wire 12. The first coupling end has an external thread, the second coupling end has an internal thread, and a plurality of axially distributed voids are provided on the outer circumference of the first coupling end, so that the voids become smaller when the first coupling end and the second coupling end are screwed together, and the proximal end of the intermediate wire 12 can be fixed by making the intermediate cavity smaller. The rotational shaft 1131 has a receiving lumen for receiving the intermediate wire 12, the receiving lumen and the intermediate lumen communicating to provide a passageway for the intermediate wire 12 extending proximally to distally.

Further, the wire clamping assembly 113 further includes a unidirectional rotating member located between the moving member 111 and the rotating shaft 1131, the unidirectional rotating member being configured to rotate the wire clamping assembly 113 in a first direction and prevent the wire clamping assembly 113 from rotating in a second direction, the first and second directions being opposite. The unidirectional rotation member of the present embodiment is disposed between the wire clamping assembly 113 and the moving member 111 to allow the wire clamping assembly 113 to rotate in a first direction but not in a second direction, preventing excessive coupling between the intermediate wire 12 and the mitral valve clamp 2 from being able to be released. The present embodiment is not particularly limited in the kind of the unidirectional rotating member. The unidirectional rotation member may be a unidirectional bearing, or a ratchet pawl, for example.

Preferably, the unidirectional rotating member of the present embodiment is a ratchet pawl. Specifically, the unidirectional rotation member includes a ratchet wheel disposed at a distal end of the rotation shaft 1131 and a pawl configured to be fixed at a distal end of the moving member 111, and the wire clamping assembly is rotated in a first direction relative to the moving member 111 by cooperation of the ratchet wheel and the pawl, but not rotated in a second direction opposite to the first direction.

Further, referring to fig. 4-7, the wire clamping assembly 113 further includes a positioning pin 1133, the moving member 111 is provided with a first positioning through slot a, the outer wall of the rotating shaft 1131 is provided with a second positioning through slot B, the axis of the first positioning through slot a is offset to the axis of the moving member 111, the axis of the second positioning through slot B is offset to the axis of the rotating shaft 1131, the first positioning through slot a and the second positioning through slot B after being matched form a positioning through hole, and the positioning pin 1133 is arranged through the positioning through hole in a penetrating manner so as to prevent the relative movement between the moving member 111 and the rotating shaft 1131.

Specifically, the present embodiment does not particularly limit the shape of the cross section of the first positioning through groove a provided on the moving member 111. Illustratively, the cross section of the first positioning through groove a of the present embodiment is circular arc-shaped. Also, the shape of the cross section of the second positioning through groove B provided on the outer wall of the rotation shaft 1131 is not particularly limited in this embodiment. Illustratively, the cross section of the second positioning through groove B of the present embodiment is rectangular in shape, so as to facilitate processing. When the positioning pin 1133 is inserted into the positioning through hole formed by the first positioning through groove and the second positioning through groove, the rotation shaft 1131 of the wire clamping assembly 113 is limited to move relative to the moving part 111. When the positioning pin 1133 is inserted into the positioning through hole, the moving member 111 is driven by the driving member 112 to move axially, and the wire clamping assembly 113 also moves synchronously, so as to drive the intermediate wire 12 to move, and further the clamping arm 23 of the mitral valve clip 2 is driven to rotate. When the positioning pin 1133 is removed from the positioning through hole, the rotating shaft 1131 may rotate relative to the moving member 111 to drive the intermediate wire 12 to rotate, so as to achieve coupling or separation between the intermediate wire 12 and the vertical portion of the base 223.

From the above, the axial movement of the intermediate wire 12 effects the opening or closing of the first and second clamp arms 231, 232 by the brake assembly 22. Therefore, the angle by which the clamp arm 23 rotates is a function of the displacement by which the moving member 111 moves. That is, the current rotation angle of the arm 23 can be known through the current displacement of the moving member 111 and the functional relationship between the rotation angles of the moving member 111 and the arm 23. In this embodiment, the first link 221, the first clamping arm 231, the base 223, and the central base 21 form a link structure in a pin connection manner, so that the functional relationship is a linear relationship.

Thus, in the present embodiment, by providing the first mark 1111 on the moving member 111 and providing the second mark 132 on the housing 13 to be matched with the displacement of the moving member 111, the operator can know the opening and closing angle of the clamp arm 23, that is, the opening and closing degree of the mitral valve clip 2.

Specifically, the first mark 1111 is provided on the moving member 111, and when the moving member 111 moves axially relative to the housing 13, the first mark 1111 also moves axially relative to the housing 13. Based on the travel of the first mark 1111, a through groove penetrating in the radial direction is provided as the observation path 131 at a position corresponding to the housing 13. The length of the through groove in the axial direction is slightly longer than the travel distance of the first mark 1111. In this way, the operator can observe the movement and position of the first mark 1111 through the through groove. The position of the observation path 131 may be provided on one side or both sides of the axial direction of the housing 13. Illustratively, the number of the first marks 1111 of the present embodiment is two, which are disposed at both sides of the axial direction symmetry of the moving member 111. Correspondingly, the number of the through grooves is also two, and symmetrically arranged on the housing 13. Meanwhile, a second mark 132 is provided at the periphery of the observation path 131. By the cooperation of the first mark 1111 and the second mark 132, the operator can know the displacement of the moving member 111, and thus the operator can know the opening and closing angle of the clamp arm 23. The second mark 132 is exemplarily disposed at one side or both sides of the length direction of the through slot, and when the first mark 1111 and the second mark 132 or one of the second marks 132 is aligned, the operator can know the opening and closing angle of the current clamp arm 23.

Optionally, the first mark 1111 and the second mark 132 are one or more of text, symbols, graphics, patterns. Illustratively, the first mark 1111 of the present embodiment is a scale mark, and the second mark 132 is a letter. The letter identifies that the first clip arm 231 and the second clip arm 232 are spread apart to a certain angle. Alternatively, the second indicia 132 may be a plurality that respectively identify different angles of splaying between the first clamp arm 231 and the second clamp arm 232. For example: when the graduation marks are aligned with a certain letter, this indicates that the current mitral valve clip 2 is opened to a certain angle. The first mark 1111 as shown in fig. 7 is a scale line, the second mark 132 is four, and numerals "0", "60", and "120", and the letter "RE", respectively. The above-described four second marks 132 are alternately provided on both sides of the observation path 131. In other embodiments the first mark 1111 may be provided as a graphic and the second mark 132 may be provided as a graphic. For example, the graph is a double arrow; the pattern is the pattern of the clamp arms 23 with different unfolding angles.

Preferably, as shown in fig. 4, the housing 13 further comprises a viewing window 136 protruding from a surface of the housing 13, the viewing window 136 being provided with a magnifying lens 137 to magnify the first marking 1111 and/or the second marking 132.

Specifically, the observation window 136 of the present embodiment covers the observation channel 131 and the second mark 132, and the observation window is further provided with a magnifying glass 137, and the magnifying glass 137 has a magnifying effect on the first mark 1111 and the second mark 132, so that a doctor can know the opening and closing degree of the mitral valve clip 2 during operation more conveniently.

Preferably, referring to fig. 4, a boss 1112 is further disposed at the distal end of the moving member 111, and a first mark 1111 is disposed on the boss 1112. In this embodiment, by providing the boss 1112 at the distal end of the moving member 111 and providing the first mark 1111 on the boss 1112 so that the first mark 1111 is closer to the observation path 131, the accuracy of observation can be improved.

Another embodiment of the present utility model provides a mitral valve clip system for treating mitral regurgitation, comprising a delivery device 1 for a mitral valve and a mitral valve clip 2. Referring to fig. 1-3, in the valve clip system of the present embodiment, when the driving member 112 is rotated rightward, the moving member 111 gradually moves upward, the intermediate wire 12 gradually moves upward, so as to drive the central base 21 to move upward, the mitral valve clip 2 gradually opens, and at the same time, the first mark 1111 also moves along the axial direction of the intermediate wire 12 relative to the housing 13, so that the rotation angle of the clip arm 23 can be observed in the observation channel 131 on the housing 13 to be gradually increased, and the opening and closing degree of the mitral valve clip 2 can be determined by the second mark 132 in cooperation with the first mark 1111.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (14)

1. A valve clip delivery device, comprising:

a moving assembly, an intermediate wire, and a housing;

the housing includes an inner cavity;

the moving assembly comprises a moving part, the distal end of the moving part is arranged in the inner cavity of the shell, the moving part can move relative to the shell along the axial direction, and the moving part is used for driving the valve clip to open and close by driving the intermediate wire to move along the axial direction;

the moving member includes at least one first mark;

the housing includes a viewing channel for viewing the first indicia and at least one second indicia disposed about the viewing channel for cooperating with the first indicia to display the degree of opening and closing of the valve clip.

2. The valve clip delivery device of claim 1, wherein the moving assembly further comprises a driver for driving the moving member to move axially, and the driver is threadably coupled to the moving member;

the driving member is configured to be rotatable only with respect to the housing, and the moving member is configured to be movable only axially with respect to the housing.

3. The valve clip delivery device of claim 2, wherein the proximal end of the housing is further provided with a proximal opening that tapers inwardly to form an opening shoulder;

the distal end of the driver is provided with a circumferentially extending open recess, and the open shoulder is received in the open recess such that the driver is constrained to rotate only relative to the housing.

4. The valve clip delivery device of claim 3, wherein a first restriction is provided on an outer distal side of the moveable member, and wherein the housing is provided with a second restriction, the first and second restrictions being configured for moveable connection such that the moveable member is restricted to only axial movement relative to the housing.

5. The valve clip delivery device of claim 1, wherein the distal end of the moveable member is further provided with a boss, the first marker being disposed on the boss.

6. The valve clip delivery device of claim 1, wherein the first indicia and the second indicia are one or more of text, symbols, graphics, patterns.

7. The valve clip delivery device of claim 1, wherein the housing further comprises a viewing window protruding from a surface of the housing, the viewing window being provided with a magnifying lens to magnify the first marker and/or the second marker.

8. The valve clip delivery device of claim 1, further comprising a clip wire assembly rotatably received in the moving assembly and fixedly connected to the intermediate wire to effect detachable connection of the intermediate wire to the valve clip by rotation.

9. The valve clip delivery device of claim 8, wherein the clip wire assembly comprises a rotating shaft and a handle proximal to the rotating shaft, the handle having a lumen for receiving the intermediate wire, the rotating shaft having a receiving lumen for receiving the intermediate wire, the lumen and receiving lumen being in communication; the handle is coupled with the rotational shaft to secure the intermediate wire.

10. The valve clip delivery device of claim 9, wherein the clip wire assembly further comprises a unidirectional rotation member located between the moving member and the rotational shaft, the unidirectional rotation member configured to rotate the clip wire assembly in a first direction and to prevent rotation of the clip wire assembly in a second direction, the first and second directions being opposite.

11. The valve clip delivery device of claim 10, wherein the clip wire assembly further comprises a locating pin;

the moving part is provided with a first positioning through groove, the outer wall of the rotating shaft is provided with a second positioning through groove, and the first positioning through groove and the second positioning through groove after being matched form a positioning through hole;

the locating pin penetrates through the locating through hole so as to prevent relative movement between the moving piece and the rotating shaft.

12. A valve clip system comprising the valve clip delivery device of any one of claims 1-11 and a valve clip.

13. The valve clip system of claim 12, wherein the valve clip comprises a central base detachably connected to the distal end of the valve clip delivery device, a clip arm and a clip arm link connected to the central base, the clip arm and the clip arm link being rotatable about an axis of the central base to grip or release a valve.

14. The valve clip system of claim 13, further comprising a brake assembly comprising a first clip arm and a second clip arm, the brake assembly comprising a first link, a second link, and a base, wherein the first link is rotatably connected at one end to the first clip arm and at the other end to the base; the base comprises a horizontal portion and a vertical portion, two ends of the horizontal portion are respectively connected with the first connecting rod and the second connecting rod, the vertical portion is movably accommodated in the central base, and the far end of the intermediate wire penetrates through the central base and is detachably connected with the vertical portion.