Valve clamping device

Abstract

This application relates to the technical field of medical devices, and particularly to a valve clamping device. The valve clamping device includes a first clamping member, which includes a positioning portion and a plurality of clamping pieces connected to the positioning portion; a support assembly, which includes a connecting member, a support member and an elastic member; the first end of the connecting member movably passes through the positioning portion, and the second end of the connecting member is connected to the support member; the elastic member is disposed on the connecting member; a second clamping member, which includes a plurality of clamping arms, each clamping arm is respectively rotatably connected to the positioning portion and the support member, and the clamping arms and the clamping pieces are arranged in one-to-one correspondence; pushing the connecting member to move in a direction away from the positioning portion, the elastic member deforms, and the clamping arms move in a direction away from the corresponding clamping pieces, so that the valve clamping device is unfolded; releasing the connecting member, the elastic member drives the clamping arms to move in a direction close to the corresponding clamping pieces under the action of the restoring force, so that the valve clamping device is closed. The valve clamping device of this application has a simple structure, is more convenient for processing and assembly, has a simple operation, and has higher reliability and safety.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a valve clamping device. Background Art

[0002] The mitral valve is composed of two valve leaflets attached to the periphery of the left atrioventricular orifice. It is connected to the papillary muscles by chordae tendineae and functions to prevent the blood in the left ventricle from flowing back into the left atrium. Mitral regurgitation (MR) is caused by congenital abnormalities or acquired diseases, and the valve cannot be completely closed during left ventricular contraction, causing some of the blood flowing from the left atrium into the left ventricle to flow back into the left atrium, leading to a series of pathological changes and clinical symptoms of the heart. In severe cases, heart failure may occur.

[0003] Currently, for the treatment of mitral regurgitation, there are mainly two methods: surgical operation and interventional treatment. Surgical operations have the disadvantages of large trauma, obvious postoperative pain, slow recovery, and high risks. Interventional treatment is mainly divided into two types: transcatheter mitral valve repair (TMVR) and transcatheter mitral valve implantation (TMVI). Existing transcatheter mitral valve repair techniques include edge-to-edge repair, artificial chordae tendineae implantation, annulus repair, etc. The principle is the same as that of surgical operations, but the repair instruments are delivered to the mitral valve site through minimally invasive approaches such as femoral artery puncture or apical puncture, maximally preserving the original structure of the mitral valve. It has high safety but a risk of recurrence. Transcatheter mitral valve replacement means delivering an artificial valve (mainly a biological valve) to the mitral valve through the femoral vein atrial septum or through the apex, and fixing it in the annulus after release to replace the diseased valve. At present, it seems to have relatively low safety and a risk of biological valve failure.

[0004] With the development of interventional treatment technology, transcatheter valve treatment, which is less painful, has a faster recovery, less bleeding, and greatly reduces the surgical mortality and postoperative complication rates of traditional surgical contraindications or high-risk patients, will become the mainstream means for the treatment of mitral regurgitation.

[0005] However, the valve clamping devices in the existing technology have problems such as too complex self-locking devices, relatively troublesome assembly operations, and insufficient reliability and safety. Summary of the Invention

[0006] The purpose of this application is to provide a valve clamping device to optimize the structure of the valve clamping device and improve the reliability and safety of the application of the valve clamping device.

[0007] Based on the above purpose, this application provides a valve clamping device, including:

[0008] The first clamping member includes a positioning portion and a plurality of clamping pieces connected to the positioning portion; in a natural state, there is a tendency for the plurality of clamping pieces to move away from each other;

[0009] The support assembly includes a connecting member, a support member, and an elastic member; the first end of the connecting member movably passes through the positioning portion, and the second end of the connecting member is connected to the support member; the elastic member is disposed on the connecting member;

[0010] The second clamping member includes a plurality of clamping arms, each clamping arm is respectively rotatably connected to the positioning portion and the support member, and the clamping arms and the clamping pieces are arranged in one-to-one correspondence;

[0011] Push the connecting member to move in a direction away from the positioning portion, the elastic member deforms, and the clamping arm moves in a direction away from the corresponding clamping piece, so that the valve clamping device is deployed; release the connecting member, and the elastic member drives the clamping arm to move in a direction close to the corresponding clamping piece under the action of the restoring force, so that the valve clamping device is closed.

[0012] In the above technical solution, optionally, the first clamping member includes two clamping pieces, the second clamping member includes two clamping arms, and the two clamping pieces and the two clamping arms are respectively disposed on both sides of the connecting member;

[0013] The connecting member is in a T shape, and the connecting member includes a first connecting portion and a second connecting portion connected vertically; one end of the first connecting portion movably passes through the positioning portion and forms the first end of the connecting member, and the other end of the first connecting portion is connected to the second connecting portion; the second connecting portion is connected to the support member and forms the second end of the connecting member.

[0014] In any of the above technical solutions, optionally, the support member is in a V shape, both ends of the support member respectively form connection positions, the support member is respectively rotatably connected to the two clamping arms through the connection positions, and the bent end of the support member is connected to the second end of the connecting member;

[0015] The number of the support members is two, and the two support members are respectively disposed on both sides of the connecting member.

[0016] In any of the above technical solutions, optionally, a positioning groove is formed at the connection portion of the clamping arm with the positioning portion, and the clamping arm can be connected to the positioning portion through a positioning member at different positions in the positioning groove to change the deployment length of the clamping arm.

[0017] In any of the above technical solutions, optionally, the elastic member is a helical spring;

[0018] The helical spring is sleeved on the first connecting portion of the connecting member, and two ends of the helical spring are respectively connected to the positioning portion and the second connecting portion of the connecting member; when the connecting member is pushed to move away from the positioning portion, the elastic member undergoes tensile deformation.

[0019] In any of the above technical solutions, optionally, the elastic member is a torsion spring;

[0020] The torsion spring is sleeved on the second connecting portion of the connecting member, and two abutting ends of the torsion spring respectively abut against side walls of the two clamping arms facing away from the clamping piece; when the connecting member is pushed to move away from the positioning portion, the elastic member undergoes torsional deformation.

[0021] In any of the above technical solutions, optionally, the first clamping member further includes a control line, a positioning hole is formed at an end of the clamping piece away from the positioning portion, and the control line can movably pass through the positioning hole;

[0022] A positioning folding portion that folds away from the side where the connecting member is located is further formed on the clamping piece, and the clamping piece is formed of a nickel-titanium alloy material.

[0023] In any of the above technical solutions, optionally, the valve clamping device further includes a mandrel, and the mandrel is detachably connected to a first end of the connecting member.

[0024] In any of the above technical solutions, optionally, the valve clamping device further includes a release assembly;

[0025] The release assembly is disposed between the plurality of clamping pieces, and the release assembly includes a first sleeve and a second sleeve that are snap-connected. The first sleeve is sleeved outside a first end of the connecting member and is connected to the positioning portion, and the second sleeve is connected to a side of the first sleeve facing away from the positioning portion; the mandrel can pass through the first sleeve and the second sleeve and be connected to the first end of the connecting member.

[0026] In any of the above technical solutions, optionally, a first clamping position extending in the radial direction is formed on the first sleeve, and a second clamping position that can be snap-connected to the first clamping position is formed on the second sleeve;

[0027] The first clamping position is formed as a rectangle or an arc.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] The valve clamping device of the present application uses the first clamping member and the second clamping member as the main body, and the support assembly as the base. The second clamping member can rotate relative to the first clamping member and the support assembly within a certain angle range, so as to realize the closing and opening of the valve clamping device. Therefore, the structure of the valve clamping device of the present application is simple, and the processing and assembly are more convenient. Moreover, the self-locking structure part with the elastic member as the main body is easier to operate, has higher reliability and safety, making the success rate of the operation using the valve clamping device of the present application higher, and the reliability and safety are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 The unfolded structural schematic diagram of the first valve clamping device provided by the embodiment of the present invention;

[0032] Figure 2 The closed structural schematic diagram of the first valve clamping device provided by the embodiment of the present invention;

[0033] Figure 3 The exploded structural schematic diagram of the first valve clamping device provided by the embodiment of the present invention;

[0034] Figure 4 The structural schematic diagram of the first clamping member of the valve clamping device provided by the embodiment of the present invention;

[0035] Figure 5 The structural schematic diagram of one clamping arm of the second clamping member of the valve clamping device provided by the embodiment of the present invention;

[0036] Figure 6 The structural schematic diagram of the support member of the support assembly of the valve clamping device provided by the embodiment of the present invention;

[0037] Figure 7 The structural schematic diagram of the connecting member of the support assembly of the valve clamping device provided by the embodiment of the present invention;

[0038] Figure 8 The exploded structural schematic diagram of the release assembly of the valve clamping device provided by the embodiment of the present invention;

[0039] Figure 9 The overall structural schematic diagram of the release assembly of the valve clamping device provided by the embodiment of the present invention;

[0040] Figure 10 Schematic diagram of the deployment structure of the second valve clamping device provided by an embodiment of the present invention;

[0041] Figure 11 Schematic diagram of the closed structure of the second valve clamping device provided by an embodiment of the present invention;

[0042] Figure 12 Schematic diagram of the elastic member of the support assembly of the second valve clamping device provided by an embodiment of the present invention;

[0043] Figure 13 Schematic diagram of the valve clamping device provided by an embodiment of the present invention covered with a braided fabric layer.

[0044] Reference numerals:

[0045] 1 - First clamping member, 11 - Clamping piece, 111 - Positioning hole, 112 - Positioning flap, 12 - Positioning portion, 121 - Extension portion, 2 - Second clamping member, 21 - Clamping arm, 211 - Connecting arm, 2111 - Positioning groove, 212 - Clamping arm main body, 3 - Connecting member, 31 - First connecting portion, 32 - Second connecting portion, 4 - Support member, 41 - Connecting position, 42 - Bent end, 5 - Elastic member, 51 - Helical spring, 52 - Torsion spring, 6 - Mandrel, 7 - Release assembly, 71 - First sleeve, 711 - First clamping position, 72 - Second sleeve, 721 - Second clamping position, 81 - Bolt, 82 - Ferrule, 9 - Braided fabric layer. Detailed implementation manners

[0046] The following detailed implementation manners are provided to help readers obtain a comprehensive understanding of the methods, devices, and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be obvious. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, except for operations that must occur in a specific order, changes that will be obvious after understanding the disclosure of the present application can be made. In addition, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

[0047] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be obvious after understanding the disclosure of the present application.

[0048] Throughout the specification, when an element such as a layer, region, or substrate is described as being "on," "connected to," "coupled to," "above," or "covering" another element, it can be directly "on," "connected to," "coupled to," "above," or "covering" the other element, or there can be one or more other elements intervening therebetween. In contrast, when an element is described as being "directly on," "directly connected to," "directly coupled to," "directly above," or "directly covering" another element, there can be no other elements intervening therebetween.

[0049] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0050] Although terms such as "first," "second," and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, the first component, element, region, layer, or section described in the examples herein could also be termed the second component, element, region, layer, or section without departing from the teachings of the examples.

[0051] For ease of description, spatial relationship terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another as shown in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" encompasses both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0052] The terms used herein are for describing various examples only and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "comprise", "include" and "have" enumerate the stated features, quantities, operations, components, elements and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0053] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Accordingly, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0054] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application.

[0055] Reference is now made to Figures 1 to 13 describe a valve clamping device according to some embodiments of the present application.

[0056] Embodiments of the present application provide a valve clamping device for capturing valve leaflets during mitral valve edge-to-edge repair surgery to reduce mitral regurgitation.

[0057] Reference is made to Figures 1 to 3 and Figure 10 and Figure 11 As shown, in an embodiment of the present application, the valve clamping device includes a first clamping member 1, a second clamping member 2, a support assembly, a mandrel 6, and a release assembly 7.

[0058] Referring to Figure 4 and in combination with Figures 1 to 3 As shown, the first clamping member 1 includes a positioning portion 12, two clamping pieces 11 connected to both sides of the positioning portion 12 and arranged opposite to each other, and a control line (not shown in the figure). The positioning portion 12 is connected between the first ends of the two clamping pieces 11, and the second ends of the clamping pieces 11 are free ends. In a natural state (i.e., when no external force acts on the clamping pieces 11), the free ends of the two clamping pieces 11 tend to move away from each other, that is, the two clamping pieces 11 can be relatively unfolded to cooperate with the second clamping member 2 to capture the valve leaflets. A positioning hole 111 is formed at the second end of the clamping piece 11, and the control line can movably pass through the positioning hole 111. By pulling the clamping piece 11 through the control line, the opening and closing angle of the clamping piece 11 can be controlled. Positioning holes 111 are formed on both of the two clamping pieces 11 arranged opposite to each other. Therefore, the two clamping pieces 11 can be respectively controlled through the control line to realize the unfolding or closing of the first clamping member 1. Figures 1 to 3 Figure 1 shows the first clamping member 1 in a closed state.Figure 4 The first clamping member 1 is shown in the deployed state.

[0059] In addition, referring to Figure 4 As shown, positioning folding portions 112 that are folded outward are further formed on the sides of the clip pieces 11 facing away from each other. The positioning folding portions 112 can be formed into convex structures, triangular or other shaped folding structures, etc. Figure 4 The positioning folding portion 112 is shown as an outwardly folded triangular structure in . When the first clamping member 1 is deployed, the clip piece 11 contacts one side of the valve leaf of the mitral valve, and cooperates with the second clamping member 2 (the specific structure of the second clamping member 2 will be specifically described in the following embodiments) to achieve clamping at the mitral valve. And during clamping, the positioning folding portion 112 on the clip piece 11 can increase the frictional force of the first clamping member 1 at the clamping position, thereby improving the clamping stability of the valve clamping device of this embodiment.

[0060] For the material of the clip piece 11, nitinol alloy material and 316 stainless steel can be selected. Due to the superior physical and chemical properties of nitinol alloy, the material of the clip piece 11 is preferably nitinol alloy material. The nitinol alloy material has good elasticity, anti-bending property, corrosion resistance and stability, and is non-toxic. Therefore, the clip piece 11 formed of nitinol alloy material has a certain resilience, enabling the first clamping member 1 to automatically deploy in the natural state. In addition, the positioning portion 12 and the clip piece 11 of the first clamping member 1 of this embodiment can be an integrally formed structure, that is, the positioning portion 12 and the clip piece 11 are an integral structure formed of nitinol alloy material.

[0061] In addition, referring to Figure 4 As shown, extension portions 121 extending outward are formed on both sides of the positioning portion 12 (the sides not connected to the clip piece 11). The extension portions 121 are used to connect with the second clamping member 2.

[0062] Referring to Figure 5 and combining with Figures 1 to 3 As shown, the second clamping member 2 includes two clamping arms 21 arranged opposite to each other. The clamping arms 21 are arranged in one-to-one correspondence with the clip pieces 11, so that each clip piece 11 can cooperate with the corresponding clamping arm 21 to form a clamping action. The clamping arms 21 are in the shape of plates, and a vertical edge structure is formed on the edge of the side facing the clip piece 11. The vertical edge structure cooperates with the clip piece 11 to play a more stable clamping role. At one end of each clamping arm 21, two parallel connecting arms 211 are formed. The two connecting arms 211 are respectively used to connect the extension portions 121 on both sides of the positioning portion 12 and the support assembly. As in Figure 2 and Figure 3As shown, one end of the connecting arm 211 away from the clamping arm main body 212 is rotatably connected to the extension 121 of the positioning portion 12 through a pivot member such as a bolt 81. The position where the connecting arm 211 is connected to the clamping arm main body 212 is rotatably connected to the support assembly through a pivot member such as a bolt 81. Thus, during the movement of the support assembly relative to the first clamping member 1, the clamping arm 21 can be driven to rotate, thereby realizing the opening and closing of the second clamping member 2.

[0063] See Figure 5 As shown, a positioning groove 2111 extending from the end of the connecting arm 211 towards the clamping arm main body 212 is formed on the connecting arm 211. The connecting arm 211 can be connected to the positioning portion 12 through a pivot member such as a bolt 81 at different positions of the positioning groove 2111, thereby realizing the adjustment of the unfolding length and unfolding angle of the clamping arm 21. As Figure 1 shown, the structure of the connecting arm 211 connected to the positioning portion 12 at the end of the positioning groove 2111 is shown. At this time, the unfolding length of the clamping arm 21 is the longest and the unfolding angle is the largest, which is convenient for cooperating with the clamping piece 11 to capture the valve leaf.

[0064] See Figures 1 to 3 As shown, the support assembly includes a connecting member 3, two support members 4, and an elastic member 5.

[0065] Specifically see Figure 7 and in combination with Figures 1 to 3 shown, the connecting member 3 has a T-shaped structure, which includes a first connecting portion 31 and a second connecting portion 32 connected vertically. One end of the first connecting portion 31 passes through the positioning portion 12 movably and extends between the two clamping pieces 11. This end of the first connecting portion 31 is the first end of the connecting member 3. The other end of the first connecting portion 31 is connected to the second connecting portion 32, and the second connecting portion 32 as a whole serves as the second end of the connecting member 3. The second connecting portion 32 has two connecting ends respectively disposed on both sides of the first connecting portion 31, and the two connecting ends are respectively used to connect the two support members 4. Specifically, the connecting ends of the second connecting portion 32 can be connected to the support member 4 through a connecting member such as a bolt 81.

[0066] Specifically see Figure 6 and in combination with Figures 1 to 3As shown in the figure, the support member 4 is in a V-shaped plate structure. Its two ends are respectively formed into connection positions 41, and the connection positions 41 are used to connect with the second clamping member 2 (the connection between the two can be realized by pivot members such as bolts 81); the bent portion of the support member 4 is formed into a bent end 42, and the bent end 42 is used to connect with the connection end of the connecting member 3 (the connection between the two can be realized by connection members such as bolts 81). The connection positions 41 of the support member 4 are symmetrically arranged on both sides of the bent end 42. The number of support members 4 is two, and the two support members 4 are symmetrically arranged on both sides of the connecting member 3. For each support member 4, one of its connection positions 41 is used to connect one clamping arm 21 of the second clamping member 2, and the other connection position 41 is used to connect the other clamping arm 21 of the second clamping member 2. Therefore, through the supporting and connecting effects of the two support members 4 on the clamping arms 21 on both sides, on the one hand, it can ensure the stable connection with the two clamping arms 21, and on the other hand, it can make the two clamping arms 21 change symmetrically during the opening and closing process, that is, ensure that the opening and closing angle changes of the two clamping arms 21 are consistent.

[0067] It should be noted that, as Figures 1 to 3 shown, the structure in which the clamping arm 21 is connected to the clamping piece 11, the clamping arm 21 is connected to the support member 4, and the support member 4 and the connecting member 3 are all connected by bolts 81 is shown. And to prevent the bolts 81 from falling off, a ferrule 82 is cooperatively arranged at the connection of the above-mentioned bolts 81, and the bolts 81 are fixed with the ferrule 82 to realize the stable connection of the connection of the above-mentioned structure.

[0068] In addition, for the material of the clamping arm 21, nitinol alloy material and 316 stainless steel can be selected, and nitinol alloy material is preferably used.

[0069] The elastic member 5 is a self-locking member of the valve clamping device, and it can realize the locking of the valve clamping device when the valve clamping device is closed. Two structural forms of the elastic member 5 are shown in this embodiment. The following combines Figures 1 to 3 and Figures 10 to 12 to specifically describe the structure and self-locking principle of the elastic member 5.

[0070] As Figures 1 to 3 shown, the elastic member 5 of an embodiment of the valve clamping device of the present application is a helical spring 51. It is sleeved on the first connection portion 31 of the connecting member 3, and one end of the elastic member 5 is fixedly connected to the positioning portion 12 or the end of the first connection portion 31 far from the second connection portion 32, and the other end of the elastic member 5 is fixedly connected to the end of the first connection portion 31 for connecting the second connection portion 32 or the second connection portion 32. Taking Figure 1Taking the perspective of the valve coupling device shown as an example, during the operation of the valve clamping device, the end of the connecting member 3 extending between the clips 11 is pushed downward, the distance between the positioning portion 12 and the second connecting portion 32 of the connecting member 3 increases, the coil spring 51 is elastically stretched, and the clamp arm 21 moves away from the corresponding clip 11 under the pulling action of the connecting member 3 and the support member 4, that is, the clamp arm 21 is unfolded relative to the clip 11, and the valve clamping device is in an unfolded state. When the connecting member 3 is released (i.e., the force acting on the connecting member 3 is cancelled), the coil spring 51 will elastically retract and generate an elastic restoring force. This restoring force can pull the positioning portion 12 and the second connecting portion 32 of the connecting member 3 closer to each other, and the clamping arm 21 moves toward the corresponding clamping piece 11 under the pulling action of the connecting member 3 and the support member 4, i.e., the clamping arm 21 is closed relative to the clamping piece 11 until the valve clamping device is in a stable closed state. That is, the valve clamping device can be locked by cooperating with the connecting member 3 and the support member 4. The structure is simple, easy to assemble and operate, and has high reliability and safety.

[0071] It should be noted that when the elastic member 5 is a coil spring 51, the fixed connection between the end of the elastic member 5 and the positioning portion 12 and the connecting member 3 can be achieved by welding, bonding with medical glue or clamping, as long as a stable connection between the elastic member 5 and the positioning portion 12 and the connecting member 3 can be achieved.

[0072] like Figures 10 to 12 As shown, the elastic member 5 of another embodiment of the valve clamping device of the present application is a torsion spring 52, which is sleeved on the second connecting portion 32 of the connecting member 3, and the two abutting ends of the torsion spring 52 respectively abut against the side walls of the clamping arms 21 on both sides of the connecting member 3 away from the clamping sheet 11. Figure 10 Taking the perspective of the valve coupling device shown as an example, during the operation of the valve clamping device, the end of the connecting member 3 extending between the clips 11 is pushed downward, the distance between the positioning portion 12 and the second connecting portion 32 of the connecting member 3 increases, and the clamp arm 21 moves away from the corresponding clip 11 under the pulling action of the connecting member 3 and the support member 4, that is, the clamp arm 21 is unfolded relative to the clip 11. The unfolding of the clamp arm 21 will push the torsion spring 52 to undergo torsional deformation, and the valve clamping device is in an unfolded state. When the connecting member 3 is released (i.e., the force acting on the connecting member 3 is cancelled), the torsion spring 52 will undergo a torsional rotation and generate a torsional restoring force at the same time. This restoring force can push the clamp arm 21 to close relative to the clamp sheet 11. The closing of the clamp arm 21 drives the positioning portion 12 and the second connecting portion 32 of the connecting member 3 to approach each other through the support member 4, so that the valve clamping device reaches a stable closed state, that is, the valve clamping device can be locked by cooperating with the connecting member 3 and the support member 4 through the torsion spring 52. The structure is simple, easy to assemble and operate, and has high reliability and safety.

[0073] Alternatively, ifFigure 10 and Figure 11 As shown, there are two torsion springs 52, which are respectively mounted on the second connection parts 32 on both sides of the first connection part 31 of the connecting member 3. The two torsion springs 52 act synchronously, so that the expansion and closing process of the clamp arm 21 is smoother, and the closing state of the valve closing device is more stable, which further improves the reliability and safety of the device.

[0074] See also Figures 1 to 3 As shown, the valve closing device of this embodiment pushes the connecting member 3 during operation by the operator operating the mandrel 6. The mandrel 6 is a slender rod, one end of which can be detachably connected to the end of the connecting member 3 extending between the clips 11 (the first end of the connecting member 3), such as threaded connection or clamping connection. Figure 3 As shown, an external threaded connection portion is formed at one end of the mandrel 6, an internal threaded connection hole is formed at the first end of the connector 3, and the mandrel 6 is threadedly connected to the first end of the connector 3, so that when the connector 3 needs to be pushed, the connector 3 can be controlled by operating the mandrel 6. It can be understood that in this embodiment, an internal threaded connection hole can be formed at one end of the mandrel 6, and an external threaded connection portion can be formed at the first end of the connector 3, thereby realizing the threaded connection between the mandrel 6 and the connector 3.

[0075] See also Figure 8 and Figure 9 Combined with Figures 1 to 3 As shown, the release assembly 7 is arranged between the clips 11, and the release assembly 7 includes a first sleeve 71 and a second sleeve 72 that are connected to each other; the first sleeve 71 is sleeved on the outside of the first end of the connector 3, and the first sleeve 71 is fixedly connected to the positioning portion 12; the second sleeve 72 is connected to the side of the first sleeve 71 that is away from the positioning portion 12. The mandrel 6 can pass through the first sleeve 71 and the second sleeve 72 and connect to the first end of the connector 3. The first sleeve 71 is formed with a first clamping position 711 extending along its radial direction, and the first clamping position 711 is formed as a clamping groove structure, a protruding structure, or a clamping structure in which the clamping groove structure and the protruding structure exist at the same time, and the opening shape of the clamping groove structure and the protruding shape of the protruding structure can be rectangular or arc-shaped. The second sleeve 72 is formed with a second clamping position 721 extending in the radial direction thereof, and the second clamping position 721 is adapted to the first clamping position 711, so that the first sleeve 71 and the second sleeve 72 can be clamped together through the cooperation and clamping of the second clamping position 721 and the first clamping position 711. Figure 8 and Figure 9 As shown, the first latching position 711 includes a radially extending rectangular slot structure and a rectangular protrusion structure, and correspondingly, the second latching position 721 is provided with a radially extending rectangular protrusion and a rectangular slot structure, thereby realizing the latching connection between the first sleeve 71 and the second sleeve 72.

[0076] In addition, for the materials of the connecting member 3, the supporting member 4, the bolt 81, the ferrule 82, as well as the mandrel 6 and the release assembly 7, 316 stainless steel can be selected. 316 stainless steel has good tensile properties, relatively high yield strength, excellent corrosion resistance and stability, and the material is easily obtainable, which can meet the usage requirements.

[0077] In addition, an embodiment of the present application can also be coated with a braided fabric layer 9 on the first clamping member 1, the second clamping member 2 and the supporting assembly. Specifically, as Figure 13 shown, the braided fabric layer 9 can be coated on the outside of the clip 11, the clip arm 21 and the entire supporting assembly. The braided fabric layer 9 is formed of a PET polymer compound. On the one hand, after coating with the braided fabric, the contact area between the first clamping member 1, the second clamping member 2 and the valve leaflet can be increased, thereby reducing the damage caused by the clamping member to the valve leaflet. On the other hand, the braided fabric layer 9 is formed with a pore structure, which can promote endothelialization, convert non-endothelial cells on the surface of the clamping member into endothelial cells, and play an anticoagulant role. It should be noted that the braided fabric layer 9 does not affect the clamping action of the valve clamping device of this embodiment.

[0078] Next, in combination with Figure 1 and Figure 2 as well as Figure 10 and Figure 11 shown, the working principle and application operation process of the valve clamping device of this embodiment will be specifically described. Among them, Figure 2 and Figure 11 show a schematic structural diagram of the valve clamping device in the closed state, Figure 1 and Figure 10 show a schematic structural diagram of the valve clamping device in the open state.

[0079] The valve clamping device of this embodiment takes the first clamping member 1 and the second clamping member 2 as the main body, and the connecting member 3 as the base. The second clamping member 2 can rotate relative to the first clamping member 1 and the connecting member 3 within a certain angle range to realize the closing and opening of the clamping device. During the application operation process, first, the upper end of the clip 11 of the first clamping member 1 is pulled by the control line, so that the two clips 11 are close to each other and close to the release assembly 7; then the control line is released, and the clips 11 will move in the direction of separating from each other due to the metal resilience, so that the two clips 11 respectively correspond to and fit the two clip arms 21, achieving the effect of capturing the valve leaflet.

[0080] In addition, the opening angle of the two clip arms 21 can be realized by the cooperation of the mandrel 6 and the connecting member 3. First, on the premise that the mandrel 6 is connected to the connecting member 3, the movement of the connecting member 3 is controlled by controlling the movement of the mandrel 6. In Figure 1 and Figure 2From the perspective shown, the driving mandrel 6 moves downward, the connecting member 3 and the supporting member 4 move downward, and the two clamping arms 21 are pulled to relatively unfold to a predetermined angle, and the elastic member 5 stores energy. Then the mandrel 6 is rotated to disconnect the mandrel 6 from the connecting member 3. At this time, without the radial restriction of the mandrel 6, the second sleeve 72 can be disengaged from the first sleeve 71, and the first end of the connecting member 3 can move between the clamping pieces 11. Under the restoring force of the elastic member 5, the clamping arms 21 are driven to move towards the direction close to the clamping pieces 11 to lock the clamping arms 21, improve the stability of the clamping of the clamping arms 21 and the corresponding clamping pieces 11 on the valve leaflets, and thus prevent the valve clamping device from falling off at the clamping position.

[0081] Therefore, the structure of the valve clamping device of this embodiment is simple, more convenient for processing and assembly, and easy to operate. Moreover, the self-locking structure part with the spring as the main body is even simpler to operate, with higher reliability and safety, making the success rate, reliability and safety higher when using the valve clamping device of this embodiment for surgery.

[0082] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve clamping device, characterized in that, Comprising: A first clamping member, including a positioning portion and a plurality of clamping pieces connected to the positioning portion; in a natural state, there is a tendency for the plurality of clamping pieces to move away from each other; A support assembly, including a connecting member, a support member, and an elastic member; a first end of the connecting member movably passes through the positioning portion, and a second end of the connecting member is connected to the support member; the elastic member is disposed on the connecting member; A second clamping member, including a plurality of clamping arms, each clamping arm is respectively rotatably connected to the positioning portion and the support member, and the clamping arms and the clamping pieces are arranged in one-to-one correspondence; Pushing the connecting member to move in a direction away from the positioning portion, the elastic member deforms, and the clamping arm moves in a direction away from the corresponding clamping piece, so that the valve clamping device is unfolded; Releasing the connecting member, the elastic member drives the clamping arm to move in a direction close to the corresponding clamping piece under the action of the restoring force, so that the valve clamping device is closed; The connecting member is in a T shape, and the connecting member includes a first connecting portion and a second connecting portion that are vertically connected; one end of the first connecting portion movably passes through the positioning portion and forms the first end of the connecting member, and the other end of the first connecting portion is connected to the second connecting portion; the second connecting portion is connected to the support member and forms the second end of the connecting member; The elastic member is a helical spring; the helical spring is sleeved on the first connecting portion of the connecting member, and two ends of the helical spring are respectively connected to the positioning portion and the second connecting portion of the connecting member; pushing the connecting member to move in a direction away from the positioning portion, the elastic member undergoes tensile deformation; or The elastic member is a torsion spring; the torsion spring is sleeved on the second connecting portion of the connecting member, and two abutting ends of the torsion spring respectively abut against the side walls of the two clamping arms facing away from the clamping piece; pushing the connecting member to move in a direction away from the positioning portion, the elastic member undergoes torsion deformation.

2. The valve clamping device according to claim 1, wherein The first clamping member includes two clamping pieces, the second clamping member includes two clamping arms, and the two clamping pieces and the two clamping arms are respectively arranged on both sides of the connecting member.

3. The valve clamping device according to claim 2, characterized in that, The support member is in a V shape, two ends of the support member respectively form connection positions, the support member is respectively rotatably connected to the two clamping arms through the connection positions, and the bent end of the support member is connected to the second end of the connecting member; The number of the support members is two, and the two support members are respectively arranged on both sides of the connecting member.

4. The valve clamping device according to claim 1, wherein, A positioning groove is formed at the connection portion of the clamping arm with the positioning portion, and the clamping arm can be connected to the positioning portion through a positioning member at different positions in the positioning groove to change the unfolding length of the clamping arm.

5. The valve clamping device according to claim 1, wherein The first clamping member further includes a control line, and a positioning hole is formed at an end of the clamping piece away from the positioning portion, and the control line can movably pass through the positioning hole; A positioning flap that is turned over toward a side away from the connecting member is further formed on the clamping piece, and the clamping piece is formed of a nitinol alloy material.

6. The valve clamping device according to claim 1, wherein The valve clamping device further includes a mandrel, and the mandrel is detachably connected to the first end of the connecting member.

7. The valve clamping device according to claim 6, wherein The valve clamping device further includes a release assembly; The release assembly is arranged between the plurality of clips, and comprises a first sleeve and a second sleeve which are clamped together, the first sleeve is sleeved on the outside of the first end of the connector and connected to the positioning portion, and the second sleeve is connected to a side of the first sleeve which is away from the positioning portion; the core shaft can pass through the first sleeve and the second sleeve and be connected to the first end of the connector.

8. The valve clamping device according to claim 7, wherein, The first sleeve is formed with a first clamping position extending in the radial direction, and the second sleeve is formed with a second clamping position capable of clamping with the first clamping position; The first clamping position is formed in a rectangular or arc shape.

Images