Heart valve clip and manufacturing method thereof

Abstract

The present invention provides a heart valve clamp and a method for manufacturing the same. The heart valve clamp comprises a fixed arm mechanism and a clamping arm mechanism. The clamping arm mechanism comprises a clamping arm base, a clamping arm, and a first support portion. The clamping arm has a first width. The first support portion is connected to the outer end surface of the clamping arm and extends outwardly along the extension direction of the clamping arm. The first support portion has a second width, which is greater than the first width. Compared with existing heart valve clamps, this structure of the heart valve clamp only includes the first support portion, which is wider than the clamping arm, on the outer end surface of the clamping arm. This increases the width of the clamp's working portion, without increasing the overall volume of the delivery system and clamp. This effectively increases the clamping area of ​​the leaflets, increases the contact area between the clamp and the leaflets after the clamp clamps, and provides a uniform clamping force on the leaflets, thus avoiding damage to the leaflets and significantly reducing surgical difficulty and risk.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a heart valve clipper and a manufacturing method thereof. Background Art

[0002] The mitral valve is a one-way valve located between the left atrium and left ventricle of the heart. A healthy mitral valve controls blood flow from the left atrium to the left ventricle while preventing blood from flowing from the left ventricle to the left atrium. With the development of society and the aging of the population, the incidence of mitral regurgitation (MR) has increased significantly and has become a common heart valve disease.

[0003] Mitral regurgitation treatment has evolved from traditional surgical median sternotomy to minimally invasive small-incision surgery, and is now entering the era of transcatheter interventional therapy. Minimally invasive interventional treatments for mitral regurgitation have become one of the hottest research areas in interventional cardiology, with significant progress in MRI interventional therapy, which offers minimal trauma, complications, and cost.

[0004] In mitral regurgitation, interventional treatment technologies for mitral regurgitation can be divided into two categories: one is transcatheter mitral valve repair, such as MitraClip, PASCAL, ValveClam, Cardioband, Mitralign, NeoChord, etc.; the other is transcatheter mitral valve implantation. Currently, repair is the main treatment method, but there are still some problems with the technology. For example, MitralClip clamps the anterior and posterior leaflets of the mitral valve to convert the large single hole into a small double hole to achieve the purpose of treatment, but the implantation path is too long and the operation is too complicated, and it needs to be improved.

[0005] The heart valve clamp in the prior art includes a clamping arm mechanism and a fixed arm mechanism. The clamping arm mechanism includes a clamping arm and a pulling arm, and the fixing arm mechanism includes a fixed arm. The clamping arm mechanism and the fixed arm mechanism are fixedly connected. The delivery system includes a delivery sheath and a pulling wire. During surgery, the delivery sheath is connected to the bottom of the clamping arm mechanism, and the fixed arm is connected to the pulling wire. First, the heart valve clamp is delivered to the left atrium through the delivery system, and then the clamp is pushed to the lower part of the valve. The delivery sheath is pulled downward to expand the clamping wall to a certain angle. Then, the clamp is pushed upward to allow the clamping arm to hold the leaflet from the ventricular surface. Then, by releasing the pulling wire, the fixed arm is expanded and the leaflet is firmly pressed against the clamping arm. After determining that the leaflet clamping position is appropriate and the reflux treatment effect is achieved, the clamping arm is closed to complete the clamping step of the heart valve clamp.

[0006] The aforementioned heart valve clipper has a clamping arm mechanism that is a tubular structure, with the clamping arms cut and formed into the tubular structure. The clamping arms are relatively narrow, resulting in a small contact area with the leaflets after clamping. This can easily lead to stress concentration, resulting in uneven clamping force and damage to the leaflets. A hook is provided at the bottom of the clamping arm mechanism, which connects to the delivery system via the hook. The diameter of the clamping arm mechanism's tubular structure matches the diameter of the delivery system. If the clamping arms were cut directly from a slightly larger diameter tubular structure to create a wider clamping arm, the overall size of the delivery system and clipper would increase, increasing the difficulty of the procedure and affecting the adaptability of the clip to the human body after implantation. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the conventional heart valve clamper in which the clamping arms are narrow and the valve leaflets are easily damaged during clamping.

[0008] To this end, the present invention provides a heart valve clip, comprising

[0009] A fixed arm mechanism, comprising a fixed arm;

[0010] The clamping arm mechanism comprises a clamping arm base, a clamping arm and a first support portion, wherein the clamping arm base is connected to the fixed arm mechanism, and the clamping arm extends outward from the clamping arm base; the clamping arm has a first width;

[0011] The first supporting portion is connected to the outer end surface of the clamping arm and extends outward along the extension direction of the clamping arm. The width of the first supporting portion is the second width, and the second width is greater than the first width.

[0012] Optionally, in the above-mentioned heart valve clamp, the middle portion of the first support portion is hollowed out to form a closed ring shape.

[0013] Optionally, in the above-mentioned heart valve clamp, before finalization, the length of the first support portion along the extending direction of the clamping arm is greater than the width of the first support portion.

[0014] Optionally, in the above-mentioned heart valve clamp, the first supporting portion is elliptical.

[0015] Optionally, in the above-mentioned heart valve clipper, the fixing arm mechanism is disposed inside the clamping arm mechanism, and the outer wall surface of the fixing arm is a curved surface;

[0016] The bottom of the first support part connected to the clamping arm and the top opposite to the bottom are inclined outward, and the middle part of the first support part is recessed inward; when the clamp is folded, the top of the first support part is wrapped around and fitted with the outer end surface of the fixed arm, and the middle part of the fixed arm protrudes from the hollow area of ​​the first support part.

[0017] Optionally, in the above-mentioned heart valve clamp, a first connecting portion extending toward the clamping arm is provided at the bottom of the first supporting portion.

[0018] Optionally, in the above-mentioned heart valve clamp, the first support portion and the clamping arm are integrally formed.

[0019] Optionally, in the above-mentioned heart valve clamp, a second support portion is provided on the first support portion and extends along the extension direction of the clamping arm.

[0020] The present invention provides a method for manufacturing the heart valve clip described in any one of the above, comprising:

[0021] Processing the first support portion and the clamping arm; the width of the clamping arm is a first width;

[0022] The first supporting portion is subjected to shaping processing to obtain a first supporting portion having a second width, and the first supporting portion is connected to the outer end surface of the clamping arm; the second width is greater than the first width.

[0023] Optionally, the manufacturing method of the above-mentioned heart valve clipper,

[0024] In the step of machining the first support portion and the clamping arm, the clamping arm and the first support portion having a hollowed-out middle and closed ring shape are cut out of the tubular structure; the length of the first support portion along the extending direction of the clamping arm is greater than the width of the first support portion;

[0025] In the step of shaping the first support portion, a mold is placed in the hollow area of ​​the first support portion, and the first support portion is expanded and heat-shaped.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The heart valve clamp provided by the present invention is connected to the delivery system during surgery. The heart valve clamp is first delivered to the left ventricle position through the delivery system, and the heart valve clamp is pushed to the lower part of the valve. The delivery sheath is moved to unfold the clamping arm, and the first support part is driven to open synchronously. After the clamping arm and the first support part are unfolded to a certain angle, the heart valve clamp is pushed upward so that the clamping arm and the first support part hold the leaflet from the bottom of the valve, and then the fixing arm is released. The fixing arm is firmly pressed on the clamping arm and the first support part from the top of the valve; after determining that the leaflet clamping position is appropriate and the reflux treatment effect is achieved, the delivery sheath is then withdrawn, and the lower clamping arm is retracted and closed to complete the clamping step of the heart valve clamp.

[0028] Compared with the existing heart valve clamp, only the first support part with a width greater than the clamp arm is set on the outer end surface of the clamp arm, and only the width of the working part of the clamp is increased. There is no need to increase the overall volume of the delivery system and the clamp, which effectively increases the clamping area of ​​the leaflet. After the clamp clamps the leaflet, the contact area with the leaflet is increased, and the clamp has a uniform clamping force on the leaflet, avoiding damage to the leaflet, greatly reducing the difficulty and risk of surgery.

[0029] 2. The manufacturing method of the heart valve clip provided by the present invention first processes the first support portion and the clamping arm, then shapes the first support portion to obtain a first support portion with a width greater than the clamping arm. This effectively increases the clamping area between the clamping arm and the first support portion when clamping the valve leaflets. This allows the clip to apply uniform clamping force to the valve leaflets, avoiding damage to the leaflets and significantly reducing surgical risks during clip implantation. Furthermore, after the first support portion is machined, it can be shaped to obtain first support portions of varying widths according to the requirements of different valve structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic diagram of the heart valve clip provided by Example 1 of the present invention when it is collapsed;

[0032] Figure 2 This is a schematic diagram of the heart valve clip provided by Example 1 of the present invention when it is collapsed;

[0033] Figure 3 for Figure 1 Schematic diagram of the middle clamping arm mechanism;

[0034] Figure 4 A front view of the clamping arm mechanism provided in Example 1 of the present invention;

[0035] Figure 5 This is an expanded view of the clamping arm mechanism provided in Example 1 of the present invention;

[0036] Figure 6 for Figure 1 Schematic diagram of the fixed arm mechanism;

[0037] Figure 7 A front view of the fixed arm mechanism provided in Example 1 of the present invention;

[0038] Figure 8This is an expanded view of the fixed arm mechanism provided in Example 1 of the present invention;

[0039] Figure 9 A schematic diagram of the fixed arm of the fixed arm mechanism provided in Example 1 of the present invention when the fixed arm is opened;

[0040] Figure 10 This is a schematic diagram of the heart valve clip provided by Example 1 of the present invention when it is opened;

[0041] Figure 11 This is a schematic diagram of the heart valve clip provided by Example 1 of the present invention when implanted in the body;

[0042] Figure 12 A schematic diagram of a heart valve clip provided by a modified embodiment of the present invention when collapsed;

[0043] Figure 13 for Figure 11 Schematic diagram of the middle clamping arm mechanism;

[0044] Figure 14 A front view of a clamping arm mechanism provided in a modified embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 10-fixed arm mechanism; 11-fixed arm; 12-fixed arm base; 13-barb; 14-pulling hole; 20-clamping arm mechanism; 21-clamping arm base; 22-clamping arm; 23-first supporting part; 231-first connecting part; 24-second supporting part; 25-pulling arm; 26-pulling arm base; 27-hanging head; 30-delivery sheath; 40-pushing rod. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0050] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] Example 1

[0052] This embodiment provides a heart valve clip, such as Figures 1 to 5 As shown, it includes a fixed arm mechanism 10 and a clamping arm mechanism 20. The fixed arm mechanism 10 includes a fixed arm 11, and the clamping arm mechanism 20 includes a clamping arm base 21, a clamping arm 22, and a first support portion 23. The clamping arm base 21 is connected to the fixed arm mechanism 10, and the clamping arm 22 extends outward from the clamping arm base 21. In the collapsed state of the heart valve clamp, the clamping arm 22 extends in the length direction, and the direction perpendicular to the extension direction of the clamping arm 22 in the same plane is the width direction. The clamping arm 22 has a first width. The first support portion 23 is connected to the outer end surface of the clamping arm 22 and extends outward along the extension direction of the clamping arm 22. The first support portion 23 has a second width, which is greater than the first width.

[0053] With this structure of the heart valve clamp, during surgery, the delivery system is connected to the heart valve clamp, and the heart valve clamp is first delivered to the left ventricle position through the delivery system, and then pushed to the lower part of the valve. The clamping arm 22 is unfolded by moving the delivery sheath 30, and the first support part 23 is driven to open synchronously. After the clamping arm 22 and the first support part 23 are unfolded to a certain angle, the heart valve clamp is pushed upward so that the clamping arm 22 and the first support part 23 hold the leaflet from the bottom of the valve, and then the fixing arm 11 is released. The fixing arm 11 is firmly pressed on the clamping arm 22 and the first support part 23 from the top of the valve; after determining that the leaflet clamping position is appropriate and the reflux treatment effect is achieved, the delivery sheath 30 is then withdrawn, and the lower clamping arm 22 is retracted and closed, completing the clamping step of the heart valve clamp.

[0054] Compared with the existing heart valve clamp, only the first support part 23 with a width greater than the clamp arm 22 is set on the outer end surface of the clamp arm 22, which only increases the width of the working part of the clamp, and there is no need to increase the overall volume of the delivery system and the clamp, that is, the clamping area of ​​the leaflet is effectively increased. After the clamp clamps the leaflet, the contact area with the leaflet is increased, and the clamp has a uniform clamping force on the leaflet, avoiding damage to the leaflet, greatly reducing the difficulty and risk of surgery.

[0055] See also Figures 2 to 5 The first support portion 23 is hollowed out in the middle to form a closed ring. For example, the second width H of the first support portion 23 can be adjusted by shaping. The hollowing out of the middle of the first support portion 23 facilitates placing a mold into the first support portion 23 to shape the first support portion 23. The width of the first support portion 23 can be adjusted according to the actual desired valve structure.

[0056] Optimally, before shaping, the length of the first support portion 23 along the extending direction of the clamping arm 22 is greater than its width. For example, the first support portion 23 may be elliptical with rounded corners to prevent damage to the leaflets during clamping. The length of the first support portion 23 is less than its width, facilitating expansion of the first support portion 23 along its width during shaping. During expansion, the first support portion 23 decreases in length and increases in width.

[0057] See also Figure 1 and Figure 2 The clamping arm mechanism 20 and the fixed arm mechanism 10 are both tubular structures, and the fixed arm mechanism 10 is inserted into the clamping arm mechanism 20. The outer peripheral wall of the fixed arm 11 is an arc surface; the bottom of the first support portion 23 connected to the clamping arm 22 and the top opposite to the bottom are inclined outward, and the middle of the first support portion 23 is concave inward. Figure 2 The top and bottom of the first support portion 23 are inclined outward and the inner wall is an arc surface. The arc surface of the top and bottom of the first support portion 23 matches the arc surface of the outer peripheral wall of the fixed arm 11. When the clamp is folded, the top of the first support portion 23 wraps around the outer end surface of the fixed arm 11. After clamping the leaflet, the first support portion 23 and the arc surface of the fixed arm 11 can effectively mesh, clamping the leaflet steadily and minimizing damage. Optimally, see Figure 2 The middle part of the first support part 23 is recessed inward and has a straight transition section in the middle. When the clamp is folded, the inner walls of the straight transition sections in the middle of the two first support parts 23 are close to each other, so that the middle part of the fixed arm 11 protrudes from the hollow area of ​​the first support part 23. After clamping the leaflet, the straight transition section and the middle part of the fixed arm 11 can clamp the leaflet firmly and stably.

[0058] A first connecting portion 231 extending toward the clamping arm 22 is provided at the bottom of the first support portion 23 to enhance the connection strength between the first support portion 23 and the clamping arm 22, the strength of the first support portion 23, and the clamping strength after the leaflet is clamped. Optimally, the clamping arm mechanism 20 is cut and formed from a single piece of tubing, with the first support portion 23 and the clamping arm mechanism 20 integrally formed. This provides good integrity, ease of fabrication, a secure connection between the various components, and a stable clamping force after the leaflet is clamped.

[0059] Best, see Figure 1 、 Figures 3 to 5 The first support portion 23 is provided with a second support portion 24 extending in the direction of extension of the clamping arm 22. For example, the second support portion 24 is in the shape of an elongated strip, which is welded to the inner wall surface of the first support portion 23 and is located in the middle of the width direction of the first support portion 23 to increase the strength and supporting force of the first support portion 23 and further enhance the stability after clamping the leaflet.

[0060] See also Figures 3 to 5 , the two clamping arms 22 are symmetrically arranged. The clamping arm mechanism 20 also includes a pulling arm base 26, two symmetrically arranged pulling arms 25 and a hanging head 27. The pulling arm base 26 is located at the bottom of the clamping arm base 21, and the pulling arm base 26 is hollow cylindrical. The pulling arm 25 extends outward from the pulling arm base 26 and merges with the clamping arm 22. The merging section is connected to the first connecting portion 231 of the first support portion 23. A hanging head 27 is provided at the bottom of the pulling arm base 26. The hanging head 27 is an inverted "T"-shaped hook. The delivery sheath 30 is provided with a "T"-shaped groove that cooperates with the hanging head 27. During surgery, the clamp is connected to the "T"-shaped groove of the delivery sheath 30 through the hanging head 27.

[0061] See also Figures 6 to 9 The fixed arm mechanism 10 is cut and formed from a whole pipe, with good integrity and easy processing. The fixed arm mechanism 10 also includes a fixed arm base 12, barbs 13 and a pulling hole 14. Among them, the fixed arm base 12 is located at the bottom of the fixed arm mechanism 10, and the fixed arm base 12 is a hollow cylinder. The two fixed arms 11 are symmetrically arranged on the fixed arm base 12 and extend outward from the fixed arm base 12. Each fixed arm 11 is provided with at least one barb 13, and the barb 13 is protruding from the outer wall of the fixed arm 11. When the fixed arm 11 is in the retracted state, the barb 13 is tilted downward. The fixed arm 11 is pressed tightly against the leaflet, and the contact between the barb 13 and the leaflet can increase the friction between the fixed arm 11 and the leaflet, thereby enhancing the stability of clamping the leaflet. A pulling hole 14 is provided at the top of each fixed arm 11 for the pulling 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.

[0062] The fixing arm mechanism 10 and the clamping arm mechanism 20 are both made of shape memory alloys, such as NiTi. The fixing arm 11 is pre-shaped and deployed to a certain angle. For example, the pre-shaped deployment angle of the fixing arm 11 is 120°. The pre-shaped deployment angle of the fixing arm 11 is greater than the maximum deployment angle of the clamping arm 22 to ensure that the fixing arm 11 can still be pressed against the clamping arm 22 when the clamping arm 22 is deployed to the maximum angle, maintaining the clamping effect on the leaflet. The surfaces of the fixing arm 11 and the clamping arm 22 are both covered with fiber cloth (not shown in the figure), such as PET cloth, which allows the endothelial tissue to climb.

[0063] See also Figure 11 The delivery system includes a delivery sheath 30, a push rod 40, and a pull wire (not shown). The push rod 40 is slidably disposed within the delivery sheath 30 and has a fixed step. The push rod 40 is hollow. One end of the pull wire is located outside the push rod 40, while the other end is disposed within and extends from the push rod 40. The other end of the pull wire then passes through two pulling holes 14 in sequence and returns to the push rod 40, extending from the push rod 40. The fixed step of the push rod 40 abuts the bottom surface of the fixed arm base 12, and the fixed arm 11 is in a retracted state when the pull wire is tightened. A "T"-shaped groove is provided at the top of the delivery sheath 30, and the clamp hook 27 is fixedly engaged in the "T"-shaped groove.

[0064] The heart valve clip provided in this embodiment is described in detail using the example of treating mitral regurgitation. The surgical procedure is transcatheter, and the delivery system is delivered to the left atrium. Subsequent operations are based on this.

[0065] After the heart valve clipper is placed in the left atrium through the delivery system, the clipper is pushed to the lower part of the valve by the push rod 40. The fixed step of the push rod 40 abuts against the bottom surface of the fixed arm base 12 to position the fixed arm base 12 and the clamping arm base 21. The delivery sheath 30 is pulled downward, and the delivery sheath 30 drives the pulling arm 25 downward, so that the clamping arm 22 and the first support part 23 are unfolded to a certain angle. Then the clipper is pushed upward so that the clamping arm 22 and the first support part 23 hold the leaflet. Then the pulling line is released, the fixed arm 11 is unfolded and pressed on the leaflet and the clamping arm 22. The state of the fixed arm 11 and the clamping arm 22 when they are both unfolded is shown in the figure. Figure 10 After confirming the clamping effect, the push rod 40 is withdrawn and the delivery sheath 30 is rotated to disengage the hanging head 27 from the "T"-shaped groove of the delivery sheath 30, thereby completing the release of the heart valve clamp.

[0066] As an alternative embodiment of Example 1, see Figures 12 to 14Alternatively, the second support portion 24 may be omitted. In this case, the first support portion 23 is more flexible, provides gentle contact with the leaflets, and causes minimal damage to the leaflets. As a variation, the first support portion 23 may be formed first and then welded to the clamping arm 22. The first support portion 23 may also be any other shape, such as a rectangle or a diamond. The first support portion 23 may also be a solid structure, i.e., its center is not hollowed out. As long as the width H of the first support portion 23 is greater than the width of the clamping arm 22, the clamping area of ​​the clamping arm mechanism 20 can be increased.

[0067] Example 2

[0068] This embodiment provides a method for manufacturing a heart valve clamp, comprising the following steps: processing the first support portion 23 and the clamping arm 22; the width of the clamping arm 22 is a first width; shaping the first support portion 23 to obtain a first support portion 23 with a second width, and connecting the first support portion 23 to the outer end surface of the clamping arm 22; the second width is greater than the first width.

[0069] This method for manufacturing a heart valve clip first processes the first support portion 23 and the clamping arms 22, then shapes the first support portion 23 to obtain a first support portion 23 that is wider than the clamping arms 22. This effectively increases the clamping area between the clamping arms 22 and the first support portion 23 when they clamp the valve leaflets. This allows the clip to apply uniform clamping force to the leaflets, preventing damage to the leaflets and significantly reducing surgical risks during clip implantation. Furthermore, after the first support portion 23 is machined, it can be shaped to produce different widths based on the requirements of different valve structures.

[0070] Furthermore, in the step of processing the first support portion 23 and the clamping arm 22, the clamping arm 22 and the first support portion 23 with a hollow middle portion and a closed ring shape are cut out on the tubular structure; the length of the first support portion 23 along the extension direction of the clamping arm 22 is greater than the width of the first support portion 23; in the step of shaping the first support portion 23, the mold is placed in the hollow area of ​​the first support portion 23, and the first support portion 23 is expanded and heat-shaped.

[0071] The clamping arm 22 and the first support part 23 are cut and formed on the entire tubular structure, which is convenient for processing, the clamping arm mechanism 20 has good integrity, the components are firmly connected, and the clamping force is stable and reliable; the middle part of the first support part 23 is hollowed out and is a closed ring, which is convenient for expanding and heat-setting it, and the width of the first support part 23 is conveniently adjusted to adapt to valves with different structures.

[0072] The length of the first support portion 23 along the extension direction of the clamping arm 22 is greater than its width. For example, the elliptical first support portion 23 is cut from the tubular structure by laser cutting. The first support portion 23 has smooth corners and edges, which prevents damage to the leaflets during clamping. The length of the first support portion 23 is less than its width, which facilitates expanding the first support portion 23 outward along its width during shaping to obtain first support portions 23 of varying widths. When expanded, the first support portion 23 becomes shorter in length and wider in width.

[0073] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A heart valve clip, characterized in that: include A fixed arm mechanism (10), comprising a fixed arm (11); The clamping arm mechanism (20) comprises a clamping arm base (21), a clamping arm (22) and a first support portion (23), wherein the clamping arm base (21) is connected to the fixed arm mechanism (10), and the clamping arm (22) extends outward 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 surface of the clamping arm (22) and extends outward along the extension direction of the clamping arm (22); the first supporting portion (23) has a second width, and the second width is greater than the first width; The middle portion of the first supporting portion (23) is hollowed out to form a closed ring shape; The fixed arm mechanism (10) is arranged inside the clamping arm mechanism (20), and the outer wall surface of the fixed arm (11) is a curved surface; The bottom of the first support portion (23) connected to the clamping arm (22) and the top opposite to the bottom are inclined outward, the middle of the first support portion (23) is recessed inward and has a straight transition section in the middle; when the clamp is in a folded state, the top of the first support portion (23) wraps around and fits the outer end surface of the fixed arm (11), and the inner walls of the straight transition sections in the middle of the two first support portions (23) are close to each other, so that the middle of the fixed arm (11) protrudes from the hollow area of ​​the first support portion (23).

2. The heart valve clip according to claim 1, characterized in that: Before shaping, 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).

3. The heart valve clip according to claim 2, characterized in that: The first supporting portion (23) is elliptical.

4. The heart valve clip according to claim 2, characterized in that: The bottom of the first supporting portion (23) is provided with a first connecting portion (231) extending toward the clamping arm (22).

5. The heart valve clip according to any one of claims 1 to 4, characterized in that: The first supporting portion (23) and the clamping arm (22) are integrally formed.

6. The heart valve clip according to any one of claims 1 to 4, characterized in that: A second supporting portion (24) extending along the extending direction of the clamping arm (22) is provided on the first supporting portion (23).

7. A method for manufacturing a heart valve clip according to any one of claims 1 to 6, characterized in that: include Processing the first supporting portion (23) and the clamping arm (22) having the first width; The first supporting portion (23) is subjected to a shaping process to obtain a first supporting portion (23) having a width equal to the second width, and the first supporting portion (23) is connected to the outer end surface of the clamping arm (22).

8. The method for manufacturing a heart valve clip according to claim 7, characterized in that: In the step of machining the first support portion (23) and the clamping arm (22), the clamping arm (22) and the first support portion (23) with a hollowed-out middle portion and a closed ring shape are cut out from the tubular structure; In the step of shaping the first support portion (23), a mold is placed in the hollow area of ​​the first support portion (23), and the first support portion (23) is stretched and heat-shaped.

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