CN115702840A - Heart valve clamping device and manufacturing method thereof - Google Patents

Abstract

The invention provides a heart valve clamping device and a manufacturing method thereof. The clamping arm mechanism comprises a clamping arm base, a clamping arm and a first supporting part, and the width of the clamping arm is a first width; the first supporting portion is connected to the outer end face of the clamping arm and extends outwards along the extending direction of the clamping arm, the width of the first supporting portion is a second width, and the second width is larger than the first width. The heart valve clamping device of this structure, compare with current heart valve clamping device, only set up the first supporting part that the width is greater than the clamping arm at the outer terminal surface of clamping arm, only increase clamping device working portion's width, need not to increase the whole volume of conveying system and clamping device, effectively increase the clamping area of leaflet promptly, clamp behind the leaflet increase with leaflet area of contact, the clamping-force of clamping device to leaflet is even, avoid haring the leaflet, greatly reduced operates the degree of difficulty and operates the risk.

Description

Heart valve clamping device and manufacturing method thereof

Technical Field

The invention relates to the technical field of medical instruments, in particular to a heart valve clamping device and a manufacturing method thereof.

Background

The mitral valve is a one-way valve located between the left atrium and the left ventricle of the heart, and a normal healthy mitral valve can control blood flow from the left atrium to the left ventricle while avoiding blood flow from the left ventricle to the left atrium. With the development of society and the aging population, the incidence rate of Mitral Regurgitation (MR) is in a significantly rising state, and is now a common heart valve disease.

The mitral valve regurgitation treatment is currently in the era of traditional sternum median incision surgery and recent minimally invasive small incision surgery treatment, and is coming up to the era of transcatheter interventional treatment. The mitral regurgitation interventional minimally invasive treatment technology has become one of the most popular research directions in interventional cardiology, and interventional treatment MR methods with small trauma, less complications and less cost are greatly developed.

In mitral valve regurgitation, the mitral valve regurgitation interventional treatment techniques can be divided into two categories: one is transcatheter mitral valve repair, such as mitralip, PASCAL, valececlam, cardioband, mitralign, neoChord, etc., and the other is transcatheter mitral valve placement, which currently takes repair as the main treatment means, but the current technology has some problems, such as mitralip achieves the purpose of treatment by clamping anterior and posterior leaflets of the mitral valve to change a large single hole into a small double hole, but the implantation path is too far, the operation is too complicated, and the improvement is still needed.

The heart valve clamping device in the prior art comprises a clamping arm mechanism and a fixing arm mechanism, wherein the clamping arm mechanism comprises a clamping arm and a traction arm, and the fixing arm mechanism comprises a fixing arm. The clamping arm mechanism is fixedly connected with the fixing arm mechanism. The conveying system comprises a conveying sheath tube and a traction line, the conveying sheath tube is connected with the bottom of a clamping arm mechanism during operation, a fixing arm is connected with the traction line, the heart valve clamping device is conveyed to the left atrium position through the conveying system, then the clamping device is pushed to the lower portion of a valve, the conveying sheath tube is pulled downwards to enable a clamping wall to be unfolded to form a certain angle, the clamping device is pushed upwards to enable the clamping arm to pocket valve leaflets from the ventricle surface, then the traction line is released to enable the fixing arm to be unfolded and firmly press the valve leaflets on the clamping arm, and after the valve leaflet clamping position is determined to be proper and the regurgitation treatment effect is achieved, the clamping arm is closed, and the clamping step of the heart valve clamp is completed.

Foretell heart valve clamping device, clamping arm mechanism are the body structure, and clamping arm is through cutting the shaping in body structure, and clamping arm width is narrower, and the centre gripping leaflet back is little with leaflet area of contact, and stress concentration appears easily and leads to the inhomogeneous damage leaflet of clamping-force. The bottom of the clamping arm mechanism is provided with a hanging head and is connected with the conveying system through the hanging head, the diameter of the pipe body of the clamping arm mechanism is matched with the diameter of the conveying system, if the pipe body with a slightly larger diameter is directly adopted to cut the clamping arm to obtain the clamping arm with a wider width, the whole size of the conveying system and the clamping device is increased, the operation difficulty is increased, and the adaptability of the human body after the clamping device is placed into the clamping device is influenced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that the width of the clamping arm of the heart valve clamping device is narrow in the prior art, and the valve leaflets are easy to be damaged when being clamped.

To this end, the invention provides a heart valve clamp comprising

The fixing arm mechanism comprises a fixing arm;

the clamping arm mechanism comprises a clamping arm base, a clamping arm and a first supporting part, the clamping arm base is connected with the fixed arm mechanism, and the clamping arm extends outwards from the clamping arm base; the width of the clamping arm is a first width;

the first supporting portion is connected to the outer end face of the clamping arm and extends outwards along the extending direction of the clamping arm, the width of the first supporting portion is a second width, and the second width is larger than the first width.

Optionally, in the cardiac valve clamping device, the middle part of the first supporting part is hollowed out to form a closed ring.

Optionally, before the heart valve clamping device is shaped, the length of the first supporting portion along the extending direction of the clamping arm is greater than the width of the first supporting portion.

Optionally, in the above heart valve clamping device, the first supporting portion is elliptical.

Optionally, in the heart valve clamping device, the fixing arm mechanism is arranged in the clamping arm mechanism in a penetrating manner, and an outer wall surface of the fixing arm is an arc surface;

the bottom of the first supporting part, which is connected with the clamping arm, and the top of the first supporting part, which is opposite to the bottom, are inclined outwards, and the middle part of the first supporting part is sunken inwards; and in a furled state of the clamping device, the top of the first supporting part is wrapped and matched on the outer end face of the fixed arm, and the middle of the fixed arm protrudes out of the hollow area of the first supporting part.

Optionally, in the heart valve clamping device, a first connecting portion extending to the clamping arm is disposed at the bottom of the first supporting portion.

Optionally, in the heart valve clamping device, the first supporting part and the clamping arm are integrally formed.

Optionally, in the above cardiac valve clamping device, the first supporting portion is provided with a second supporting portion extending along the extending direction of the clamping arm.

The invention provides a method for manufacturing the heart valve clamping device, which comprises the following steps

Processing the first supporting part and the clamping arm; the width of the clamping arm is a first width;

shaping the first supporting part to obtain a first supporting part with a second width, and connecting the first supporting part to the outer end face of the clamping arm; the second width is greater than the first width.

Optionally, the method for manufacturing the heart valve clamping device,

in the step of processing the first supporting part and the clamping arm, the clamping arm and the first supporting part which is hollow in the middle and is in a closed ring shape are cut on a tubular structure; the length of the first supporting part along the extending direction of the clamping arm is greater than the width of the first supporting part;

and in the step of shaping the first supporting part, putting a mould into the hollow area of the first supporting part, and opening and carrying out heat shaping on the first supporting part.

The technical scheme of the invention has the following advantages:

1. according to the heart valve clamping device, during operation, the conveying system is connected with the heart valve clamping device, the heart valve clamping device is conveyed to the position of a left ventricle through the conveying system, the heart valve clamping device is pushed to the lower portion of a valve, the clamping arms are unfolded by moving the conveying sheath tube and drive the first supporting portion to be synchronously unfolded, after the clamping arms and the first supporting portion are unfolded to form a certain angle, the heart valve clamping device is pushed upwards to enable the clamping arms and the first supporting portion to hold valve leaflets from the bottom of the valve, then the fixing arms are released, and the fixing portions are firmly pressed on the clamping arms and the first supporting arms from the top of the valve; after the valve leaflet clamping position is determined to be proper and the effect of the regurgitation treatment is achieved, the delivery sheath is withdrawn, the lower clamping arm is closed, and the clamping step of the heart valve clamping device is completed.

Compare with current heart valve clamping device, only set up the first supporting part that width is greater than the clamping arm at the outer terminal surface of clamping arm, only increase clamping device working part's width, need not to increase the whole volume of conveying system and clamping device, effectively increase the clamping area of leaflet promptly, increase with leaflet area of contact behind the clamping device centre gripping leaflet, the clamping-force of clamping device to leaflet is even, avoids damaging the leaflet, greatly reduced operation degree of difficulty and operation risk.

2. According to the manufacturing method of the heart valve clamping device, the first supporting part and the clamping arm are processed firstly, then the first supporting part with the width larger than that of the clamping arm is obtained through shaping treatment of the first supporting part, the clamping area of the clamping arm and the first supporting part when the valve leaflets are clamped can be effectively increased, the clamping force of the clamping device on the valve leaflets is uniform, the valve leaflets are prevented from being damaged, and the operation risk when the clamping device is implanted is greatly reduced. And after processing out first supporting part, can be according to the demand of isostructure valve, finalize the design and obtain the first supporting part of different width to first supporting part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a heart valve binder provided in example 1 of the present invention when folded;

fig. 2 is a schematic view of a heart valve binder provided in example 1 of the present invention when folded;

FIG. 3 is a schematic view of the clamp arm mechanism of FIG. 1;

fig. 4 is a front view of a clamping arm mechanism provided in embodiment 1 of the present invention;

fig. 5 is an expanded view of the clamping arm mechanism provided in embodiment 1 of the present invention;

FIG. 6 is a schematic view of the securing arm mechanism of FIG. 1;

fig. 7 is a front view of a fixing arm mechanism provided in embodiment 1 of the present invention;

fig. 8 is an expanded view of a fixing arm mechanism provided in embodiment 1 of the present invention;

fig. 9 is a schematic view of a fixing arm of the fixing arm mechanism provided in embodiment 1 of the present invention when the fixing arm is opened;

FIG. 10 is a schematic view of a heart valve binder provided in example 1 of the present invention when expanded;

FIG. 11 is a schematic view of a heart valve clip device provided in example 1 of the present invention when implanted in a body;

FIG. 12 is a schematic view of a heart valve binder according to an alternate embodiment of the invention shown in collapsed condition;

FIG. 13 is a schematic view of the clamp arm mechanism of FIG. 11;

fig. 14 is a front view of a snap arm mechanism provided in accordance with a variant embodiment of the present invention.

Description of reference numerals:

10-a fixed arm mechanism; 11-a fixed arm; 12-a fixed arm base; 13-barbs; 14-a pull hole; 20-a clamping arm mechanism; 21-a clamping arm base; 22-a clamping arm; 23-a first support; 231-a first connection; 24-a second support; 25-a pulling arm; 26-a trailing arm base; 27-hanging heads; 30-a delivery sheath; 40-push rod.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a heart valve clip, as shown in fig. 1 to 5, which includes a securing arm mechanism 10 and a clip arm mechanism 20. The fixing arm mechanism 10 comprises a fixing arm 11, the clamping arm mechanism 20 comprises a clamping arm base 21, a clamping arm 22 and a first supporting part 23, the clamping arm base 21 is connected with the fixing arm mechanism 10, and the clamping arm 22 extends outwards from the clamping arm base 21; in a closed state of the heart valve clamping device, the extending direction of the clamping arms 22 is the length direction, and the direction perpendicular to the extending direction of the clamping arms 22 in the same plane is the width direction; the width of the clamping arm 22 is a first width; the first supporting portion 23 is connected to an outer end surface of the clamping arm 22 and extends outward along an extending direction of the clamping arm 22, and a width of the first supporting portion 23 is a second width, and the second width is greater than the first width.

In the heart valve clamping device with the structure, during operation, the conveying system is connected with the heart valve clamping device, the heart valve clamping device is conveyed to the position of a left ventricle through the conveying system, the heart valve clamping device is pushed to the lower part of a valve, the clamping arm 22 is unfolded by moving the conveying sheath 30 and drives the first supporting part 23 to be synchronously unfolded, after the clamping arm 22 and the first supporting part 23 are unfolded to form a certain angle, the heart valve clamping device is pushed upwards to enable the clamping arm 22 and the first supporting part 23 to hold valve leaflets from the bottom of the valve, then the fixing arm 11 is released, and the fixing part is firmly pressed on the clamping arm 22 and the first supporting arm from the top of the valve; after the leaflet clipping position is determined to be appropriate and the regurgitation treatment effect is achieved, the delivery sheath 30 is retracted, and the lower clipping arms 22 are closed and closed, thereby completing the clipping step of the heart valve clipper.

Compare with current heart valve clamping device, only set up the first supporting part 23 that width is greater than clamping arm 22 at clamping arm 22 outer terminal surface, only increase clamping device working part's width, need not to increase the whole volume of conveying system and clamping device, effectively increase the clamping area of leaflet promptly, increase with leaflet area of contact behind the clamping device centre gripping leaflet, the clamping-force of clamping device to leaflet is even, avoid haring the leaflet, greatly reduced operation degree of difficulty and operation risk.

Referring to fig. 2 to 5, the middle of the first supporting portion 23 is hollowed out to be in a closed ring shape, for example, the second width H of the first supporting portion 23 can be adjusted by a shaping manner. The middle part of the first supporting part 23 is hollowed out, so that the first supporting part 23 can be conveniently shaped by putting a die into the first supporting part 23. The width of the first support part 23 can be adjusted according to the actual desired valve structure.

Preferably, before the sizing, the length of the first supporting portion 23 along the extending direction of the clamping arm 22 is greater than the width of the first supporting portion 23. For example, the first support portion 23 has an oval shape with smooth corners, so as to prevent damage to the valve leaflets during clamping. The length of first supporting part 23 is less than the width, outwards struts first supporting part 23 along its width direction when being convenient for stereotype, and when strutting, first supporting part 23 length diminishes, and the width grow.

Referring to fig. 1 and 2, the clamping arm mechanism 20 and the fixing arm mechanism 10 are both tubular structures, the fixing arm mechanism 10 is arranged in the clamping arm mechanism 20 in a penetrating manner, and the outer peripheral wall of the fixing arm 11 is an arc surface; the first supporting portion 23 is inclined outward from the bottom portion connected to the clamping arm 22 and the top portion opposite to the bottom portion, and the middle portion of the first supporting portion 23 is recessed inward. Referring to fig. 2, the top and the bottom of the first supporting portion 23 incline outwards, the inner wall is an arc surface, the arc surfaces of the top and the bottom of the first supporting portion 23 are matched with the arc surface of the outer peripheral wall of the fixing arm 11, the folder is in a folded state, the top of the first supporting portion 23 is wrapped and matched with the outer end surface of the fixing arm 11, and after the leaflet is clamped, the first supporting portion 23 and the arc surface of the fixing arm 11 can be effectively meshed, so that the leaflet is clamped stably and is damaged little. Preferably, referring to fig. 2, the middle of the first support portion 23 is recessed inwards and has a straight transition section in the middle, and in a furled state of the clamping device, inner walls of the straight transition sections in the middle of the two first support portions 23 are closely attached to each other, so that the middle of the fixing arm 11 protrudes out of the hollow area of the first support portion 23, and after the leaflet is clamped, the straight transition section and the middle of the fixing arm 11 can be firmly clamped on the leaflet, and the clamping is stable.

The bottom of the first support part 23 is provided with a first connecting part 231 extending towards the clamping arm 22 so as to increase the connecting strength of the first support part 23 and the clamping arm 22, the strength of the first support part 23 and the clamping strength after clamping the valve leaflets. Preferably, the clamping arm mechanism 20 is formed by cutting the whole tube, the first supporting portion 23 and the clamping arm mechanism 20 are integrally formed, the clamping arm mechanism 20 has good integrity and convenient processing, all components are firmly connected, and the clamping force is stable after clamping the valve leaves.

As best seen in fig. 1, 3 to 5, the first supporting portion 23 is provided with a second supporting portion 24 extending along the extending direction of the clamping arm 22. For example, the second support portion 24 has a long bar shape, and is welded to the inner wall surface of the first support portion 23 and located at the middle of the first support portion 23 in the width direction, so as to increase the strength and supporting force of the first support portion 23 and further enhance the stability after clamping the leaflet.

Referring to fig. 3 to 5, the two clamping arms 22 are symmetrically arranged. The clamping arm mechanism 20 further comprises a pulling arm base 26, two symmetrically arranged pulling arms 25 and a hanging head 27. The draw arm base 26 is located at the bottom of the clamping arm base 21, and the draw arm base 26 is in a hollow cylindrical shape. The pulling arm 25 extends from the pulling arm base 26 to join with the clamping arm 22, and the joining section is engaged with the first connecting portion 231 of the first supporting portion 23. The bottom of the base 26 of the traction arm is provided with a hanging head 27, the hanging head 27 is an inverted T-shaped hook, the conveying sheath tube 30 is provided with a T-shaped groove matched with the hanging head 27, and the clamp is matched and connected with the T-shaped groove of the conveying sheath tube 30 through the hanging head 27 during operation.

Referring to fig. 6 to 9, the fixing arm mechanism 10 is formed by cutting the whole pipe, so that the integrity is good and the processing is convenient. The fixing arm mechanism 10 further includes a fixing arm base 12, a barb 13, and a pulling hole 14. Wherein, fixed arm base 12 is located fixed arm mechanism 10 bottom, and fixed arm base 12 is hollow cylinder shape, and two fixed arms 11 symmetry are located on fixed arm base 12 and outwards extend by fixed arm base 12. All be equipped with at least one barb 13 on every fixed arm 11, the barb 13 is protruding to be located the fixed arm 11 outer wall, fixed arm 11 folded state, barb 13 downward sloping. The fixing arm 11 is pressed on the valve leaflet, and the barb 13 is contacted with the valve leaflet to increase the friction force of the fixing arm 11 and the valve leaflet and enhance the stability of clamping the valve leaflet. The top of each fixing arm 11 is provided with a drawing hole 14 for the drawing wire to pass through. The fixed arm base 12 is fixedly connected to the clamping arm base 21, for example, the fixed arm base 12 is welded to the clamping arm base 21.

The fixing arm mechanism 10 and the clamping arm mechanism 20 are made of shape memory alloy, such as NiTi. The fixing arms 11 are unfolded to a certain angle through pre-shaping, for example, the pre-shaping unfolding angle of the fixing arms 11 is 120 degrees, and the pre-shaping unfolding angle of the fixing arms 11 is larger than the maximum unfolding angle of the clamping arms 22, so that the fixing arms 11 can still be pressed on the clamping arms 22 when the clamping arms 22 are unfolded to the maximum angle, and the clamping effect on the valve leaflets is kept. The surfaces of the fixing arm 11 and the clamping arm 22 are covered with a fabric cloth (not shown), such as a PET cloth, for the endothelial tissue to climb.

Referring to fig. 11, the conveying system includes a conveying sheath 30, a pushing rod 40 and a pulling line (not shown in the figure), the pushing rod 40 slidably penetrates through the conveying sheath 30, a fixing step is provided on the pushing rod 40, the pushing rod 40 is hollow, one end of the pulling line is located outside the pushing rod 40, the other end of the pulling line penetrates through the pushing rod 40 and extends out of the pushing rod 40, the other end of the pulling line sequentially passes through two pulling holes 14 to return to the pushing rod 40 and extend out of the pushing rod 40, the fixing step of the pushing rod 40 abuts against the bottom surface of the fixing arm base 12, and the fixing arm 11 is in a furled state when the pulling line is tightened. The top of the conveying sheath 30 is provided with a T-shaped groove, and the clamp hanging head 27 is clamped and fixed in the T-shaped groove.

The heart valve clip of the present embodiment is described in detail with reference to the treatment of mitral regurgitation, and the surgical approach is via a catheter to deliver the delivery system to the left atrial site, based on which the subsequent procedures are performed.

After the heart valve clamping device is placed at the left atrium position through the conveying system, the clamping device is pushed to the lower portion of the valve through the pushing rod 40, the fixing step of the pushing rod 40 abuts against the bottom surface of the fixing arm base 12 to position the fixing arm base 12 and the clamping arm base 21, the conveying sheath tube 30 is pulled downwards, the conveying sheath tube 30 drives the pulling arm 25 to move downwards, the clamping arm 22 and the first supporting portion 23 are unfolded to form a certain angle, and then the clamping device is pushed upwards to enable the clamping arm 22 and the first supporting portion 23 to hold the valve leaflets. The puller wire is then released and the securing arm 11 is spread over the leaflet and the clamping arm 22, the state of which when both the securing arm 11 and the clamping arm 22 are spread out being shown in figure 10. After the clamping effect is determined, the pushing rod 40 is withdrawn, the delivery sheath 30 is rotated, and the hanging head 27 is separated from the T-shaped groove of the delivery sheath 30, so that the release of the heart valve clamp is completed.

As an alternative embodiment of example 1, referring to fig. 12 to 14, it is also possible not to provide the second support 24, in which case the first support 23 is more flexible, gentle in contact with the leaflets and less damaging to the leaflets. As a modification, the first support part 23 may be formed and then welded to the clamp arm 22. The first supporting portion 23 may have any other shape, such as a rectangle, a diamond, etc., and the first supporting portion 23 may also have a solid structure, i.e., the middle portion thereof is not hollowed out, as long as the width H of the first supporting portion 23 is greater than the width of the clamping arm 22, which can increase the clamping area of the clamping arm mechanism 20.

Example 2

The embodiment provides a manufacturing method of a heart valve clamping device, which comprises the following steps: processing the first supporting part 23 and the clamping arm 22; the width of the clamping arm 22 is a first width; shaping the first support part 23 to obtain a first support part 23 with a second width, and connecting the first support part 23 to the outer end face of the clamping arm 22; the second width is greater than the first width.

According to the manufacturing method of the heart valve clamping device, the first supporting part 23 and the clamping arm 22 are processed firstly, then the first supporting part 23 is shaped to obtain the first supporting part 23 with the width larger than that of the clamping arm 22, the clamping area of the clamping arm 22 and the first supporting part 23 when the valve leaflets are clamped can be effectively increased, the clamping force of the clamping device on the valve leaflets is uniform, the valve leaflets are prevented from being damaged, and the operation risk when the clamping device is implanted is greatly reduced. And after processing out first supporting part 23, can be according to the demand of different structure valves, finalize the design and obtain the first supporting part 23 of different width to first supporting part 23.

Further, in the step of processing the first supporting part 23 and the clamping arm 22, the clamping arm 22 and the first supporting part 23 with a hollow middle part and a closed ring shape are cut on a tubular structure; the length of the first supporting part 23 along the extending direction of the clamping arm 22 is greater than the width of the first supporting part 23; in the step of performing the shaping process on the first support part 23, a mold is placed in the hollow area of the first support part 23, and the first support part 23 is subjected to expanding heat shaping.

The clamping arm 22 and the first supporting part 23 are cut and formed on the whole tubular structure, the processing is convenient, the integrity of the clamping arm mechanism 20 is good, all parts are firmly connected, and the clamping force is stable and reliable; the middle part of the first supporting part 23 is hollow and is in a closed ring shape, so that the first supporting part is convenient to expand and thermally set, and the width of the first supporting part 23 is convenient to adjust so as to adapt to valves with different structures.

The length of the first support part 23 along the extending direction of the clamping arm 22 is larger than the width of the first support part 23, for example, the first support part 23 with an oval shape is cut on a tubular structure by laser cutting, the corners of the first support part 23 are smooth, and the valve leaf can be prevented from being damaged during clamping. The length of the first supporting part 23 is smaller than the width, so that the first supporting part 23 is conveniently outwards unfolded along the width direction of the first supporting part when in sizing, and the first supporting parts 23 with different widths are obtained. When the support is opened, the first support part 23 becomes smaller in length and larger in width.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. A heart valve clamping device is characterized by comprising

A fixing arm mechanism (10) comprising a fixing arm (11);

the clamping arm mechanism (20) comprises a clamping arm base (21), a clamping arm (22) and a first supporting part (23), the clamping arm base (21) is connected with the fixing arm mechanism (10), and the clamping arm (22) extends outwards from the clamping arm base (21); the width of the clamping arm (22) is a first width;

the first supporting portion (23) is connected to the outer end face of the clamping arm (22) and extends outwards along the extending direction of the clamping arm (22), the width of the first supporting portion (23) is a second width, and the second width is larger than the first width.

2. The heart valve clamping device according to claim 1, wherein the first supporting part (23) is hollow in the middle and is in a closed ring shape.

3. Heart valve binder according to claim 2, wherein the length of the first support (23) in the direction of extension of the binder arms (22) is greater than the width of the first support (23) before sizing.

4. A heart valve binder according to claim 3, wherein the first support part (23) is oval-shaped.

5. The heart valve clamping device according to any one of claims 2-4, characterized in that the fixing arm mechanism (10) is arranged in the clamping arm mechanism (20), and the outer wall surface of the fixing arm (11) is a cambered surface;

the bottom of the first supporting part (23) connected with the clamping arm (22) and the top opposite to the bottom are inclined outwards, and the middle part of the first supporting part (23) is sunken inwards; in a furled state of the clamping device, the top of the first supporting part (23) is wrapped and matched on the outer end face of the fixed arm (11), and the middle of the fixed arm (11) protrudes out of the hollow area of the first supporting part (23).

6. A heart valve binder according to claim 3, wherein the bottom of the first support part (23) is provided with a first connection part (231) extending towards the binder arm (22).

7. Heart valve binder according to any of claims 1-6, wherein the first support part (23) is integrally formed with the binder arm (22).

8. Heart valve binder according to any of claims 2-6, wherein the first support part (23) is provided with a second support part (24) extending in the direction of extension of the binder arm (22).

9. A method of making a heart valve binder as claimed in any one of claims 1 to 8, comprising

Processing the first supporting part (23) and the clamping arm (22); the width of the clamping arm (22) is a first width;

shaping the first supporting part (23) to obtain a first supporting part (23) with a second width, and connecting the first supporting part (23) to the outer end face of the clamping arm (22); the second width is greater than the first width.

10. The method of making a heart valve binder of claim 9,

in the step of processing the first supporting part (23) and the clamping arm (22), cutting the clamping arm (22) and the first supporting part (23) which is hollow in the middle and closed in a ring shape on a tubular structure; the length of the first supporting part (23) along the extending direction of the clamping arm (22) is greater than the width of the first supporting part (23);

in the step of shaping the first support part (23), a mold is placed in the hollow area of the first support part (23), and the first support part (23) is subjected to expanding heat shaping.

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