Valve clamping device and clamping system

Abstract

The utility model provides a valve clamping device and a clamping system, the valve clamping device comprises a clamping component used for clamping a valve leaflet and a plugging piece matched with the clamping component and used for plugging, the clamping component comprises a pair of clamping assemblies capable of being opened or closed, the plugging piece can deform and self-expand, and the clamping component is used for clamping the valve leaflet. The plugging piece comprises a main plugging part and a side plugging part connected to the side portion of the main plugging part, the pair of clamping assemblies are oppositely located on the outer side of the main plugging part and can be opened or closed relative to the main plugging part, and the self-expanded main plugging part can be matched with the clamping assemblies to form a first plugging area when the clamping assemblies are closed. The self-expanded side plugging part extends in the width direction of the clamping component and can be filled in the ventage located on the adjacent side of the first plugging area to form a second plugging area when the clamping component is closed. The utility model aims at providing the valve clamping device and the clamping system to at least improve the anti-reflux effect at the junction of the valve leaflets.

Description

Technical Field

[0001] The utility model relates to the technical field of interventional medical devices, in particular to a valve clamping device and a clamping system. Background Art

[0002] Atrioventricular valves such as the mitral valve and tricuspid valve are one-way valves in the heart. Normal and healthy atrioventricular valves can control the flow of blood from the atrium to the ventricle, while preventing blood from flowing from the ventricle to the atrium. For example, the mitral valve is a one-way valve located between the left atrium and the left ventricle of the heart, which can control the flow of blood from the left atrium to the left ventricle, while preventing blood from flowing from the left ventricle to the left atrium. Specifically, the mitral valve consists of two anterior and posterior leaflets, and the apposition surface connecting the anterior and posterior leaflets is called the commissural leaflet. When the edges of the anterior leaflet and the posterior leaflet are apposition, the mitral valve can be completely closed to prevent blood from flowing from the left ventricle to the left atrium. When the leaflets of the mitral valve or its related structures undergo organic or functional changes, the anterior and posterior leaflets of the mitral valve are poorly appositioned. As a result, when the left ventricle of the heart contracts, the mitral valve cannot be completely closed, causing blood to flow back from the left ventricle to the left atrium, thereby causing a series of pathological and physiological changes, known as "mitral valve regurgitation."

[0003] There is a minimally invasive treatment surgery, in which a valve leaflet clip is delivered to the mitral valve through a delivery device, and then the anterior leaflet 1' and the posterior leaflet 2' of the mitral valve are clamped simultaneously by the relative opening of the clip (see Figure 1 As shown in the figure, the anterior and posterior leaflets of the mitral valve are fixed, thereby narrowing the interleaflet gap and reducing mitral regurgitation. Figure 1 In case of severe reflux (such as the clamping position shown in a'), the valve leaflets at the junction are usually clamped by a clamp. However, in the clamping process, it is found that in order to achieve a good anti-reflux effect, the clamping position of the clamp needs to be set close to the side (such as the clamping position shown in a') so that the pore can be as small as possible after clamping. However, the closer to the side, the shorter the clamping length of the clamp will be, which is not conducive to the stability and safety of the clamping. Therefore, based on safety considerations, the position of the clamp can only be set slightly away from the side (such as the clamping position shown in b'). After being away from the side, the clamping range of the existing clamp is limited, which greatly reduces the anti-reflux effect at the junction. Utility Model Content

[0004] The utility model aims to at least improve the anti-reflux effect at the junction of the valve leaflets by providing a valve clamping device and a clamping system.

[0005] In order to solve the above technical problems, the present utility model provides an embodiment that adopts the following technical solution:

[0006] The utility model provides a valve clamping device, comprising a clamping member for clamping a valve leaflet and a sealing member cooperating with the clamping member for sealing, the clamping member comprising a pair of clamping components that can be opened or closed, the sealing member can be deformed and can self-expand, the sealing member comprises a main sealing portion and a side sealing portion connected to the side of the main sealing portion, a pair of the clamping components are relatively located on the outside of the main sealing portion and can be opened or closed relative to the main sealing portion, the main sealing portion after self-expansion can cooperate with the clamping component to form a first sealing area when the clamping component is closed, the side sealing portion after self-expansion extends along the width direction of the clamping member and can be filled in the leakage opening adjacent to the first sealing area when the clamping component is closed to form a second sealing area.

[0007] In one embodiment, the side sealing member filled in the leak opening can adapt to the edge contour of the leak opening when the clamping assembly is closed.

[0008] In one embodiment, the side blocking portion is only provided on one side of the main blocking portion so as to only fill a leak located adjacent to the first blocking area to form the second blocking area.

[0009] In one embodiment, the number of the side sealing parts is at least two, and the two side sealing parts are respectively arranged on both sides of the main sealing part to respectively fill the two leaks located on the two adjacent sides of the first sealing area to form two second sealing areas, wherein the two opposite side sealing parts after self-expansion are symmetrically or asymmetrically arranged.

[0010] In one embodiment, the side sealing portion is more easily deformed than the main sealing portion.

[0011] In one embodiment, the sealing member is formed by weaving braided wires, and the wire diameter or weaving density of the braided wires of the side sealing part is smaller than the wire diameter or weaving density of the braided wires of the main sealing part; or, the sealing member is formed by cutting, and the rod diameter or rod density of the side sealing part formed by cutting is smaller than the rod diameter or rod density of the main sealing part.

[0012] In one embodiment, the side sealing portion includes a filling portion for filling the leak and a sealing disk for sealing the end of the leak, the filling portion is located on the side of the axial middle area of ​​the main sealing portion, and the sealing disk is located on the proximal side and / or distal side of the filling portion.

[0013] In one embodiment, the occluding disk comprises a proximal occluding disk located at a proximal side of the filling portion and / or a distal occluding disk located at a distal side of the filling portion.

[0014] In one embodiment, the proximal occluding disk, the filling portion and the distal occluding disk are connected in sequence in the axial direction and at least one of them is connected to the side of the main occluding portion. The disk surface of the proximal occluding disk and the disk surface of the distal occluding disk are larger than the sealing disk surface of the filling portion, so that a middle concave notch is formed at the edge contour of the side occluding portion.

[0015] In one embodiment, the clamping member also includes an expansion component for assisting in clamping the leaflets, the expansion component including a first expansion component and a second expansion component, the first expansion component and the second expansion component are respectively connected to a clamping component, the first expansion component and the second expansion component connected to the clamping component respectively extend in the width direction of the clamping component connected thereto, and the extended portion tends to extend toward the opposite side; in an initial state, the blocking member is squeezed and accommodated inside the first expansion component and the second expansion component; when the first expansion component and the second expansion component are opened with a pair of the clamping components, the blocking member self-expands and causes the side blocking portion to extend out of the clamping member along the width direction of the clamping member; when the first expansion component and the second expansion component are closed again with a pair of the clamping components, the main blocking portion after self-expansion is located on the inside of the first expansion component and the second expansion component and cooperates with the closed clamping component to form the first blocking area, while the side blocking portion after self-expansion is located on the outside of the first expansion component and the second expansion component and fills in the leak located adjacent to the first blocking area to form the second blocking area.

[0016] In one embodiment, the expansion component can be deformed, and the expansion component has an expanded state in a natural state and a contracted state after being squeezed; the blocking piece located on the inner side of the expansion component can be deformed by gathering inward as the expansion component is squeezed inward, and the blocking piece located on the inner side of the expansion component can self-expand when the expansion component is opened with the clamping component, so that the main blocking part is located on the inner side of the first expansion component and the second expansion component, and the side blocking part is located on the outer side of the first expansion component and the second expansion component.

[0017] In one embodiment, in the expanded state, the first expansion component and the second expansion component are asymmetrically arranged relative to the central axis of the valve clamping device, and the extended end edge of the asymmetrically arranged first expansion component and the extended end edge of the second expansion component are staggered in the width direction of the clamping component.

[0018] In one embodiment, the surface of the clamping component is covered with a first outer film, the free end of the clamping component can move in the first outer film during the opening or closing process of the clamping component, and a first partial inner film is also provided on a part of the free end of the clamping component, and the first partial inner film is located between the clamping component and the first outer film; and / or,

[0019] It also includes a driving component, which is engaged with a pair of clamping components to drive the pair of clamping components to open or close. The driving component includes a base, a driving shaft connected to the proximal end of the base and a pair of connecting arms connected to both sides of the base. One end of the pair of connecting arms is rotatably hinged on the base, and the other end is respectively hinged to the corresponding clamping components on the same side. The axial movement of the driving shaft can drive the pair of clamping components to open or close relatively. The surfaces of the pair of connecting arms and the base are covered with a second outer film. The pair of connecting arms can move in the second outer film during rotation. A second partial inner film is also provided at the connection between the pair of connecting arms and the base, and the second partial inner film is located between the driving component and the second outer film.

[0020] The utility model also provides a clamping system, comprising the valve clamping device and a conveying assembly as described above, wherein the conveying assembly is detachably connected to the valve clamping device.

[0021] The valve clamping device and clamping system of the utility model are provided with a deformable and self-expandable plugging piece. On the one hand, the main plugging part of the plugging piece cooperates with the clamping assembly to form a first plugging area, and on the other hand, the side plugging part fills the leak formed on the outside of the clamping to form a second plugging area. This method can effectively prevent the backflow at the junction of the leaflets, so that the clamping position of the valve clamping device is no longer limited, which is more conducive to ensuring the stability and safety of the clamping. Furthermore, when the plugging piece cooperates with the expansion component, the plugging piece can be completely contained inside the expansion component in the initial state, which is convenient for the overall sheathing of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the scheme of the utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model or corresponding prior art. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0023] Figure 1 It is a schematic diagram of the structure of the existing clamp holding the valve leaflet;

[0024] Figure 2 It is a three-dimensional schematic diagram of an exemplary valve clamping device of the utility model, in which the clamping assembly is opened and the blocking member self-expands;

[0025] Figure 3 is a side view schematic diagram of an exemplary valve clamping device of the utility model, in which the blocking member is in a self-expanding and unfolding state;

[0026] Figure 4 is a front view schematic diagram of an exemplary valve clamping device of the utility model, in which the blocking member is in a non-self-expanding and unfolded state;

[0027] Figure 5 is a top view schematic diagram of an exemplary valve clamping device of the utility model in an initial state;

[0028] Figure 6 is a top view schematic diagram of a clamping assembly in an exemplary valve clamping device of the utility model when it is in a closed state;

[0029] Figure 7 is a top view schematic diagram of an exemplary valve clamping device of the present invention after the clamping assembly is opened;

[0030] Figure 8 is a top view schematic diagram of the clamping assembly in the exemplary valve clamping device of the utility model after it is closed again;

[0031] Fig. 9 It is a schematic structural diagram of a sealing member in an exemplary valve clamping device of the utility model;

[0032] Fig.10 It is a schematic diagram of the side sealing part filling the leak k when the valve clamping device of the utility model is used for side clamping;

[0033] Figures 11(a) to 11(c) Schematic diagrams of different embodiments of the valve clamping device of the present invention when the expansion components are asymmetrically arranged (the figures are intended to show the structure of the expansion components, so the blocking member is only a simple schematic diagram. For the specific structure of the blocking member, please refer to the attached Figure 2 ~Attached Fig. 9 shown);

[0034] Fig.12 yes Figure 8 A local enlarged schematic diagram in FIG.

[0035] Fig.13 1 is a schematic diagram of the structure of an exemplary valve clamping device wrapped with a covering membrane of the utility model, wherein the expansion member and the blocking member are not drawn in this schematic diagram;

[0036] Fig.14 yes Fig.13 A local enlarged schematic diagram in FIG.

[0037] Fig.15 yes Fig.13 Another partial enlarged schematic diagram in;

[0038] Fig.16 yes Figure 7 A partial enlarged schematic diagram (the extended component is covered in this figure). DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; when an element is referred to as "fixed to" or "disposed on" another element, the element may be directly connected to the other element, or indirectly connected to the other element through one or more connecting elements. When an element is referred to as being "connected to" another element, it may be directly connected to the other element, or connected to the other element through one or more connecting elements.

[0041] It should also be noted that in the field of interventional medical devices, the proximal end refers to the end closer to the operator, while the distal end refers to the end farther from the operator; the direction of the central axis of rotation of an object such as a cylinder or a tube is defined as the axial direction; the circumferential direction refers to the direction around the axis of an object such as a cylinder or a tube (perpendicular to the axis and perpendicular to the cross-sectional radius); the radial direction refers to the direction along the wire diameter or radius. It is worth noting that the "end" in the terms "proximal end", "distal end", "one end", "the other end", "first end", "second end", "initial end", "end", "two ends", "free end", "upper end", "lower end", etc. is not limited to the end, endpoint or end face, but also includes a portion extending from the end, endpoint, or end face on the element to which the end, endpoint, or end face belongs for an axial distance and / or radial distance. The above definitions are only for the convenience of expression and cannot be understood as limitations on the present utility model.

[0042] The valve clamping device and the clamping system provided by the utility model are used for repairing heart valves, especially mitral valves and tricuspid valves, so as to reduce the valve leaflet gap and alleviate the regurgitation of mitral valves or tricuspid valves.

[0043] In order to clearly explain the structure of the valve clamping device 100 of the present invention, the following directions are defined: the valve clamping device 100 has a central axis oo, the central axis oo direction of the valve clamping device 100 is the Z direction, and the width W (such as Figure 2 and Figure 5 The direction perpendicular to the Z direction is the Y direction, and the direction perpendicular to both the Z direction and the Y direction is the X direction. The XY plane refers to a plane perpendicular to the Z direction and defined by a straight line extending along the X direction and a straight line extending along the Y direction intersecting the straight line. It is understandable that there may be multiple XY planes, and multiple XY planes may be arranged in parallel along the Z direction. The XZ plane refers to a plane perpendicular to the Y direction and defined by a straight line extending along the X direction and a straight line extending along the Z direction intersecting the straight line. It is understandable that there may be multiple XZ planes, and multiple XZ planes may be arranged in parallel along the Y direction. The YZ plane refers to a plane perpendicular to the X direction and defined by a straight line extending along the Y direction and a straight line extending along the Z direction intersecting the straight line. It is understandable that there may be multiple YZ planes, and multiple YZ planes may be arranged in parallel along the Y direction. The valve clamping device 100 has a certain axial length, i.e., a length in the Z direction. The clamping assembly 10 has a certain width W in the Y direction.

[0044] See also Figure 2 to Figure 8 and Fig.10 The utility model exemplarily provides a valve clamping device 100, the valve clamping device 100 includes a clamping member for clamping a valve leaflet and a blocking member 4 for blocking with the clamping member, the clamping member includes a pair of clamping components 10 that can be opened or closed, the blocking member 4 can be deformed and self-expanded, the blocking member 4 includes a main blocking portion 41 and a side blocking portion 42 connected to the side of the main blocking portion 41, the side blocking portion 42 is located on the side of the main blocking portion 41 along the Y direction, and a pair of clamping components 10 are provided. The component 10 is relatively located outside the main sealing part 41 and can be opened or closed relative to the main sealing part 41, that is, a pair of clamping components 10 are located on opposite sides of the X direction, and the main sealing part 41 after self-expansion can cooperate with the clamping component 10 to form a first sealing area s1 when the clamping component 10 is closed, and the side sealing part 42 after self-expansion extends along the width direction of the clamping member and can be filled in the leak k located on the adjacent side of the first sealing area s1 when the clamping component 10 is closed to form a second sealing area s2. The first sealing area formed can block the leaflet gap between the clamping devices, and the second sealing area formed can effectively block the leak k, so that the valve clamping device can still obtain excellent anti-reflux effect when it is clamped away from the side, ensuring the stability and safety of clamping while improving the anti-reflux effect.

[0045] Reference Figure 5 As shown, the valve clamping device 100 is in an initial state, in which the blocking member 4 is in a compressed state, which can be achieved in the following ways: Mode 1, when the valve clamping device 100 of the utility model includes an expansion member 6, the blocking member 4 can be completely gathered in the expansion member 6 and a pair of clamping assemblies 10 to achieve further compression. In this mode, when the valve clamping device 100 is pushed out of the delivery sheath of the delivery system, and when the expansion member 6 can be self-expanded (at this time, the clamping assembly 10 has not yet been opened), as shown in FIG. Figure 6 As shown, the occluding member 4 will achieve a certain degree of self-expansion with the self-expansion of the expansion member 6. Mode 2, when the expansion member 6 is not included, the occluding member 4 can be compressed by a pair of clamping members 0 and the delivery sheath in the delivery system. In this mode, when the valve clamping device 100 is pushed out of the delivery sheath of the delivery system, the occluding member 4 will achieve a certain degree of self-expansion and then achieve further complete self-expansion with the opening of the clamping assembly 10.

[0046] Reference Figure 7 As shown, as a pair of clamping assemblies 10 are opened, the blocking member 4 is fully self-expanded, at which time the side blocking portion 42 extends out and is located on the side of the main blocking portion 41 in the Y direction; Figure 8 As shown, as a pair of clamping assemblies 10 are closed again, the closed clamping assembly 10 clamps the leaflet m, and the self-expanded main sealing portion 41 cooperates with the clamping assembly 10 to form a first sealing area s1 when the clamping assembly 10 is closed. The self-expanded side sealing portion 42 extends along the width direction of the clamping member (i.e., extends in the Y direction) and is filled in the leakage located adjacent to the first sealing area s1 when the clamping assembly 10 is closed to form a second sealing area s2.

[0047] Reference Figure 7 and Figure 8 In order to effectively fill the leak and improve the blocking and anti-reflux effect, the side sealing part 42 after self-expansion can be adaptively deformed based on the outer contour of the filled tissue, that is, when the clamping assembly 10 is closed, the side sealing part 4 filled in the leak can adapt to the edge contour of the leak. The edge contour of the adaptive leak here means that when the side sealing part 42 is filled, from the Z direction, the edge of the side sealing part 42 at the filling position is against or in contact with the tissue at the leak. It should be noted that it can be partially against or in contact with each other, or it can be based on achieving comprehensive blocking so that the circumferential contour is against or in contact with each other. It should be known that if there are multiple XY planes along the Z direction, then the side sealing part 42 with a certain axial length has multiple edge contours in the axial direction. As long as one of the edge contours of the side sealing part 42 in contact with the leak tissue is against or in contact with each other, an effective axial blockage can be formed.

[0048] In one embodiment, if Figure 2 to Figure 8As shown in the figure, the side blocking portion 42 is only provided on one side of the main blocking portion 41, so as to fill only a leak located adjacent to the first blocking area s1 to form a second blocking area s2. In this embodiment, the side blocking portion 42 is asymmetrically provided on one side of the main blocking portion 41 along the X direction, so that the blocking member 4 has an asymmetrical structure along the X direction.

[0049] In another embodiment, the side plugging parts 42 are relatively arranged on the two sides of the main plugging part 41 to fill the two leaks located on the two adjacent sides of the first plugging area s1 to form two second plugging areas s2, wherein the two opposite side plugging parts 42 after self-expansion are symmetrically or asymmetrically arranged along the X direction, that is, the plugging member 4 has a symmetrical structure or an asymmetrical structure in the X direction. It should be understood that when the two side plugging parts 42 after self-expansion are symmetrically or asymmetrically arranged, the shapes of the two second plugging areas s2 formed after filling can be the same or different, because the side plugging 42 after self-expansion can adapt to the edge contour of the leak, and the same or different edge contours of the leak will inevitably lead to the formation of the same or different second plugging areas s2.

[0050] It should be understood that the number and shape of the side sealing parts 42 can be selectively set according to actual needs. For example, when it is necessary to seal the leaks on both sides after clamping, two opposite side sealing parts 42 can be set. When only the leak on one side needs to be sealed, the side sealing part 42 can be set only on one side.

[0051] In other embodiments, the side sealing portion 42 is easier to deform than the main sealing portion 41, that is, under the same external force, the side sealing portion 42 is easier to deform than the main sealing portion 41. In this way, on the one hand, the main sealing portion 41 located between the two clamping assemblies 10 can provide a certain radial support force to the clamping assembly 10 when clamping with the clamping assembly 10, thereby ensuring the clamping effect of the clamping assembly 10. On the other hand, the side sealing portion 42 located at the side can be more easily deformed in the leak to adapt to the shape of the leak, thereby ensuring the filling and sealing effect without causing unnecessary expansion of the leak; and the entire sealing member 4 is also easier to compress and gather for sheathing. As an implementation method for achieving easier deformation, for example, the sealing member 4 is formed by weaving, and the braiding wire diameter of the side sealing portion 42 is smaller than the braiding wire diameter of the main sealing portion 41. Or the braiding density of the side sealing portion 42 is smaller than the braiding density of the main sealing portion 41. Alternatively, the braiding wire diameter and the braiding density may be combined to achieve that the side sealing part 42 is more easily deformed than the main sealing part 41. As another embodiment, for example, the sealing member 4 is formed by cutting, and the rod diameter of the side sealing part 42 is smaller than the rod diameter of the main sealing part 41. Or the rod density of the side sealing part 42 is smaller than the rod density of the main sealing part, that is, the porosity of the side sealing part 42 is greater than the porosity of the main sealing part 41. Porosity refers to the percentage of the pore area after cutting to the overall surface area. Alternatively, the rod diameter method may be combined with the rod density and porosity method to achieve that the side sealing part 42 is more easily deformed than the main sealing part 41. It should be understood that the way in which the side sealing part 42 is more easily deformed than the main sealing part 41 is not limited to this.

[0052] Reference Fig. 9 As shown, the side sealing part 42 of the present invention includes a filling part 421 for filling in the leak, and the filling part 421 is arranged on the side of the main sealing part 41. Preferably, the filling part 421 is located on the side of the axial middle area of ​​the main sealing part 41. In this embodiment, the filling part 421 is connected to the main sealing part 41.

[0053] In other embodiments, the side plugging portion 42 of the utility model further includes a plugging disk for plugging the end of the leakage port, the filling portion 421 is located at the side of the axial middle region of the main plugging portion 41, and the plugging disk is located at the proximal side and / or the distal side of the filling portion 421. That is, a plugging disk is provided at the proximal side and / or the distal side of the filling portion 421, the filling portion 421 can be filled in the leakage port to achieve plugging, and the plugging disk can block and plug the upper port or the lower port of the leakage port to further enhance the anti-reflux effect.

[0054] As one embodiment, the occluding disc includes a proximal occluding disc 423 located at the proximal side of the filling part 421, the proximal occluding disc 423 is connected to the filling part 421, at least one of the two is connected to the main occluding part 41, and the self-expanded proximal occluding disc 423 can be placed on the upper side of the leaflet to block the atrial side port of the leak. In another embodiment, the occluding disc includes a distal occluding disc 422 located at the distal side of the filling part 421, the distal occluding disc 422 is connected to the filling part 421, at least one of the two is connected to the main occluding part 41, and the self-expanded distal occluding disc 422 can be placed on the lower side of the leaflet to block the ventricular side port of the leak. In another embodiment, the occluding disk includes a proximal occluding disk 423 located at the proximal side of the filling portion 421 and a distal occluding disk 422 located at the distal side of the filling portion 421. The proximal occluding disk 423, the filling portion 421 and the distal occluding disk 422 are axially connected in sequence and at least one of them is connected to the side of the main occluding portion 41. The self-expanded proximal occluding disk 423 can be placed on the upper side of the leaflet to block the atrial side port of the leak, and the self-expanded distal occluding disk 422 can be placed on the lower side of the leaflet to block the ventricular side port of the leak.

[0055] In the above embodiment, the proximal occluding disk 423, the filling portion 421 and the distal occluding disk 422 are sequentially arranged in the axial direction and at least one of them is connected to the side of the main occluding portion 41. The disk surface of the proximal occluding disk 423 and the disk surface of the distal occluding disk 422 are larger than the occluding disk surface of the filling portion 421, so that a middle concave gap is formed at the edge contour of the side occluding portion 42, that is, the filling portion 421 is the waist. The disk surface of the proximal occluding disk 423 and the disk surface of the distal occluding disk 422 with larger disk surfaces at both ends are transitionally connected with the disk surface of the filling portion 421 with smaller disk surface at the waist. At this time, the edge contour of the side occluding portion 42 is similar to the edge contour of the double-disc occluder, and the gap can be used for tissue accommodation, for example, the edge of the mitral valve leaflet can be accommodated. The proximal blocking disk 423 and the distal blocking disk 422 with a larger disk surface in this embodiment can effectively block and block the upper and lower ports of the leak, and the filling part 421 is filled in the leak to block, thereby forming an effective blockage inside and on both sides of the leak, further ensuring the anti-reflux effect. Preferably, after the valve clamping device is implanted, the proximal blocking disk 423 can be located on the atrial side above the leak to press against the valve leaflets, and the distal blocking disk 422 can be located on the ventricle side below the leak to support the valve leaflets.

[0056] like Figure 2As shown, the clamping member of the valve clamping device 100 of the utility model includes a main clamping member for clamping the leaflet, and the main clamping member includes a pair of clamping components 10 that can be opened or closed relative to the central axis oo. The pair of clamping components 10 can be symmetrically arranged based on the central axis oo of the valve clamping device 100, and the pair of clamping components 10 can be opened or closed relative to the central axis oo. Exemplarily, each clamping component 10 may include a first clamping arm 11 and a second clamping arm 12 that are arranged opposite to each other, and a first clamping arm 11 and a second clamping arm 12 cooperate to clamp a leaflet m. The first clamping arm 11 and the second clamping arm 12 both have a connecting end and a free end opposite to the connecting end along the length direction of each arm. The connecting end of the first clamping arm 11 is coupled with the connecting end of the second clamping arm 12 and the free ends can be close to each other. The first clamping arm 11 and the second clamping arm 12 that are close to each other can make their free ends move away from each other in response to the separation force, and the leaflet can be clamped between the first clamping arm 11 and the second clamping arm 12 when they are close to each other. The pair of first clamping arms 11 in the pair of clamping assemblies 10 are respectively located on the inner sides of the pair of second clamping arms 12, and the pair of first clamping arms 11 and the pair of second clamping arms 12 are coupled at the connection ends. It is understandable that the connection ends of the two first clamping arms 11 and the two second clamping arms 12 can be directly coupled or connected through one or more connecting members. Exemplarily, the valve clamping device 100 also includes a base 3 (see Figure 4 ), the first connection end of the first clamp arm 11 and the second connection end of the second clamp arm 12 are respectively connected to the base 3 to achieve coupling. Preferably, after the first connection ends of the two first clamp arms 11 are connected, they are coupled to the base 3 and the second connection ends of the two second clamp arms 12. It should be noted that the coupling method of the first clamp arm 11 and the second clamp arm 12 is not limited to this, and the coupling connection method can also refer to the existing technology, which will not be described here.

[0057] For example, the pair of first clamp arms 11 of the present invention are both elastic, and the pair of first clamp arms 11 can move away from each other and approach the second clamp arms 12 opposite thereto under the action of their own elastic force, and at the same time, they can move away from the second clamp arms 12 opposite thereto and approach each other under the actuation of the actuating member 70 (see Figure 2). The elastic first clamp arm 11 may be formed of a shape memory material configured to exhibit superelasticity in a physiological environment. Exemplarily, the shape memory material includes one or more shape memory alloys or shape memory polymers. The shape memory material is a shape memory alloy selected from the group consisting of copper-zinc-aluminum alloys, copper-aluminum-nickel alloys, nickel-titanium alloys, nickel-titanium-platinum alloys, and nickel-titanium-palladium alloys. Further, the shape memory material is a nickel-titanium alloy. The shape memory material is a shape memory polymer selected from the group consisting of oligo(ε-caprolactone)diol, oligo(p-dioxanone)diol, polynorbornene, polyisoprene, styrene-butadiene, polyurethane-based materials, and vinyl acetate polyester-based compounds.

[0058] Further, see Figure 2 , Figure 5 and Figure 6 As shown, the clamping member of the valve clamping device 100 of the utility model also includes an expansion member 6 connected to the main clamping member for auxiliary clamping of the leaflet, and the expansion member 6 includes a first expansion component 61 and a second expansion component 62, and the first expansion component 61 and the second expansion component 62 are respectively connected to a clamping component 10, and the first expansion component 61 and the second expansion component 62 connected to the clamping component 10 respectively extend in the width direction of the clamping component 10 connected thereto, and the extended part tends to extend toward the opposite side, so that the adjacent side of the leaflet clamped by the main clamping member can be auxiliary clamped between the first expansion component 61 and the second expansion component 62 in the expanded state.

[0059] See also Figures 5 to 8 and Fig.10In the initial state of the valve clamping device 100 of the utility model, the blocking member 4 is squeezed and accommodated on the inner side of the first expansion component 61 and the second expansion component 62; when the first expansion component 61 and the second expansion component 62 are opened with a pair of clamping components 10, the blocking member 4 self-expands and makes the side blocking portion 42 extend out of the clamping component along the width direction of the clamping component; when the first expansion component 61 and the second expansion component 62 are closed again with a pair of clamping components 10, the self-expanded main blocking portion 41 is located on the inner side of the first expansion component 61 and the second expansion component 62 and cooperates with the closed clamping component 10 to form a first blocking area s1, while the self-expanded side blocking portion 42 is located on the outer side of the first expansion component 61 and the second expansion component 62 and fills in the leakage opening adjacent to the first blocking area s1 to form a first blocking area s2. The deformable and self-expanding sealing member 4 of the utility model can be accommodated on the inner side of the first expansion component 61 and the second expansion component 62 in the initial state, and self-expands and unfolds during the opening process of the clamping component 10. When the clamping component 10 is closed again, the side sealing portion 42 is placed on the outer side of the expansion component and fills the leak. The expansion component not only increases the clamping width, but also forms an accommodating space for the sealing member 4, which facilitates the overall retraction of the entire valve clamping device into the sheath.

[0060] In other embodiments, see Figure 5 and Figure 6 As shown, the expansion member 6 of this embodiment can be deformed, and the expansion member 6 has an expanded state in a natural state and a contracted state after being squeezed. The blocking member 4 located on the inner side of the expansion component can be deformed and gathered inward as the expansion component is squeezed inward. The blocking member 4 located on the inner side of the expansion component can self-expand when the expansion component is opened with the clamping component 10, so that the main blocking part 41 is located on the inner side of the first expansion component 61 and the second expansion component 62, and the side blocking part 42 is located on the outer side of the first expansion component 61 and the second expansion component 62. The deformable expansion member 6 in this embodiment is compressed and deformed under the constraint of external force, so that the blocking member 4 can be compressed as the expansion member is further contracted, so that the outer diameter of the valve clamping device 100 after the overall constraint will not increase or will not increase too much, and will not cause or minimize the increase in the inner diameter of the delivery system part, which is convenient for sheath delivery.

[0061] In the deformable expansion member 6 of the utility model, the expansion member 6 as a whole or at least the unfolded portion of the expansion member 6 is formed by a shape memory material, and the shape memory material is configured to exhibit superelasticity in a physiological environment. Exemplarily, the shape memory material includes one or more shape memory alloys or shape memory polymers. The shape memory material is a shape memory alloy selected from the group including copper-zinc-aluminum alloys, copper-aluminum-nickel alloys, nickel-titanium alloys, nickel-titanium-platinum alloys and nickel-titanium-palladium alloys. Further, the shape memory material is a nickel-titanium alloy. The shape memory material is a shape memory polymer selected from the group including oligo (ε-caprolactone) diol, oligo (p-dioxanone) diol, polynorbornene, polyisoprene, styrene-butadiene, polyurethane-based materials and vinyl acetate polyester-based compounds.

[0062] Reference Figure 2 to Figure 8 In the utility model, the first extension component 61 and the second extension component 62 of the extension member 6 are respectively connected to a clamping component 10, and the first extension component 61 and the second extension component 62 of the utility model are respectively connected to two second clamping arms 12 opposite to each other on the left and right, that is, the first extension component 61 is connected to one of the second clamping arms 12, and the second extension component 62 is connected to the other second clamping arm 12, and the first extension component 61 and the second extension component 62 are located on the same side. The "same side" of the utility model refers to being located on the same side of the X direction at the same time. For example, when the first extension component 61 and the second extension component 62 respectively extend only on one side along the width direction of the clamping component 10, that is, the first extension component 61 and the second extension component 62 only include the front part or the rear part, the first extension component 61 and the second extension component 62 are simultaneously located on the front side or the rear side of the X direction, or when the first extension component 61 and the second extension component 62 extend on both sides of the width direction of the clamping component 10 at the same time, that is, the first extension component 61 and the second extension component 62 simultaneously include the front and rear parts, the two front sides are located on the same side, and the two rear sides are located on the same side.

[0063] Reference Figure 2 to Figure 8 The first extension component 61 and the second extension component 62 each include at least one extension arm. It is understandable that in order to achieve auxiliary clamping, the extension arm of the first extension component 61 and the extension arm of the second extension component 62 are always adapted to be located on the same side, as mentioned above, including at least a single-sided extension or a double-sided extension on the same side.

[0064] For example, Figure 2As shown, the first extension component 61 includes a first front extension arm 61a, and the second extension component 62 includes a second front extension arm 62a adapted to the first front extension arm 61a of the first extension component 61; the first front extension arm 61a and the second front extension arm 62a extend unilaterally on the same side, and the first front extension arm 61a and the second front extension arm 62a are used together to assist in clamping the leaflet of one of the adjacent sides of the main clamping member. Alternatively, the first extension component 61 includes a first rear extension arm 61b, and the second extension component 62 includes a second rear extension arm 62b adapted to the first rear extension arm 61b of the first extension component 61; the first rear extension arm 61b and the second rear extension arm 62b extend unilaterally on the same side, and the first rear extension arm 61b and the second rear extension arm 62b are used together to assist in clamping the leaflet of one of the adjacent sides of the main clamping member. Alternatively, as shown in the figure, the first extension component 61 includes a first front extension arm 61a and a first rear extension arm 61b, and the second extension component 62 includes a second front extension arm 62a and a second rear extension arm 62b that are compatible with the first front extension arm 61a and the first rear extension arm 61b of the first extension component 61; the first front extension arm 61a extends on the same side as the second front extension arm 62a, and the first rear extension arm 61b extends on the same side as the second rear extension arm 62b, the first front extension arm 61a and the second front extension arm 62a are used together to assist in clamping the leaflets on one adjacent side of the main clamping member, and the first rear extension arm 61b and the second rear extension arm 62b are used together to assist in clamping the leaflets on the other adjacent side of the main clamping member.

[0065] In the expanded state, the expansion member 6 of the valve clamping device 100 of the utility model has the first expansion component 61 and the second expansion component 62 symmetrically or asymmetrically arranged relative to the central axis oo, that is, symmetrically or asymmetrically arranged based on the Y direction passing through the central axis oo. Preferably, the first expansion component 61 and the second expansion component 62 are asymmetrically arranged relative to the central axis oo.

[0066] In one embodiment, when the expansion member 6 of the valve clamping device 100 of this embodiment is in an expanded state, the first expansion component 61 and the second expansion component 62 are symmetrically or asymmetrically arranged relative to the central axis oo, that is, symmetrically or asymmetrically arranged relative to the Y direction passing through the central axis oo. In this embodiment, the first expansion component 61 and the second expansion component 62, which are symmetrically or asymmetrically arranged, are opposite to each other at the extended end edges after unconstrained expansion. Here, opposite means facing, and the extended end edge refers to the edge contour. It can be understood that the edge relative at least includes the extended end edge being arranged at intervals or against each other, that is, the edge contours are spaced relative or relatively against each other.

[0067] In another embodiment, please refer to Figures 11(a) to 11(c)In the present embodiment, when the expansion member 6 in the valve clamping device 100 is in the expanded state, the first expansion component 61 and the second expansion component 62 are asymmetrically arranged relative to the central axis oo of the valve clamping device 100, that is, they are symmetrical or asymmetrical relative to the Y direction passing through the central axis oo, and the extended end edge of the first expansion component 61 and the extended end edge of the second expansion component 62 are staggered in the width direction of the clamping component 10. In the present embodiment, the asymmetric and limited end staggering means that, on the one hand, the ends of the staggered first expansion component 61 and the second expansion component 62 will not abut against each other when subjected to a contraction force, but will be orderly moved inward and contracted, so that the valve clamping device 100 is easier to sheath, avoiding the need for excessive contraction force and damage to the expansion component 6; on the other hand, more importantly, because the two extended end edges in contact with the leaflet tissue are staggered along the width direction of the clamping component 10, the effective width of the expansion component 6 clamping is increased to a certain extent. Combined with Figure 8 and Fig.12 As shown, the first expansion component 61 of this embodiment contacts the leaflet tissue to form an abutment position D1, and the second expansion component 62 contacts the leaflet component to form another abutment position D2. The two abutment positions are not directly opposite in the X direction, but are spaced along the width direction of the clamping component 10, that is, in the Y direction, and are arranged one in front of the other. A pair of leaflet tissues are pushed toward the opposite side from two directions by the two expansion components, so that the leaflet tissues within this interval range S are clamped and constrained, thereby reducing the leaflet gap. Compared with the method of directly abutting the two, this embodiment not only significantly increases the effective width of the auxiliary clamping of the expansion component 6, but can further reduce the use of the valve clamp and enhance the anti-reflux effect; and the two abutment positions are not directly opposite to each other in the X direction, thereby avoiding the problem of leaflet perforation due to relative abutment during the cardiac cycle.

[0068] In this embodiment, the manner in which the extended end edge of the asymmetrically arranged first extension component 61 and the extended end edge of the second extension component 62 are staggered in the width direction of the clamping component 10 includes at least: the extended end edge of the first extension component 61 and the extended end edge of the second extension component 62 are spaced apart or overlapped.

[0069] like Figures 11(a) to 11(c) As shown, the first extension component 61 and the second extension component 62 are asymmetrically arranged. The asymmetrical arrangement of this embodiment refers to the asymmetrical arrangement of the first extension component 61 and the second extension component 62 relative to the central axis oo of the valve clamping device 100, that is, the asymmetrical arrangement in the Y direction passing through the central axis oo.

[0070] In one embodiment, the extended end edge of the first extension component 61 shown in Figure 11(a) is overlapped with the extended end edge of the second extension component 62. At this time, one of the end edge of the first extension component 61 and the end edge of the second extension component 62 is located on the inner side, and the other is located on the outer side, and they overlap upward in X direction. The overlapping ends can form a stronger push on the leaflet tissue, so that the two leaflets between the two abutting positions can fit tightly to prevent reflux. In another embodiment, the extended end edge of the first expansion component 61 shown in FIG. 11(b) is spaced from the extended end edge of the second expansion component 62, that is, there is an X-direction spacing between the extended end edge of the first expansion component 61 and the extended end edge of the second expansion component 62. In particular, the spacing is greater than or equal to zero, and the minimum spacing in the spacing is less than the preset distance. The preset distance can be set as needed. For example, the preset spacing can be set with reference to the thickness of the leaflets. The preset spacing can be the sum of the thicknesses of the two leaflets. When the minimum spacing is less than the setting based on the sum of the thicknesses of the two leaflets, it can be ensured that the two relative expansion components after expansion can effectively assist in clamping the leaflets to ensure the clamping stability. It should be noted that the preset spacing can be set according to actual needs and is not limited to the above setting method. The minimum spacing in this embodiment refers to the minimum distance in the X-direction spacing of the edge contours of the two relatively spaced expansion components in the XY plane, such as the minimum spacing W2 in FIG. 11(b) is greater than zero. As shown in FIG. 11(c), the minimum spacing is equal to zero. As shown in FIG11 , the minimum spacing is also equal to zero, and it is understandable that the spacing distance in FIG11 may also be greater than zero. Alternatively, the first expansion component 6111 and the second expansion component 6212 in FIG11 may also be arranged to overlap in the X direction.

[0071] The difference is that in Figures 11(a) to 11(c) In the illustrated embodiment, the first front extension arm 61a of the first extension component 61 is located on the inner side of the second front extension arm 62a of the second extension component 62, and the first rear extension arm 61b of the first extension component 61 is located on the outer side of the second rear extension arm 62b of the second extension component 62. Of course, the inner and outer sides of the two can also be set in reverse. In other embodiments, the first front extension arm 61a and the first rear extension arm 61b of the first extension component 61 are both located on the outer side of the second front extension arm 62a and the second rear extension arm 62b of the second extension component 62. Of course, the inner and outer sides of the two can also be set in reverse. It should be noted that the above-mentioned asymmetric setting is only an exemplary description and is not limited thereto. Other alternative schemes made in the field based on the above-mentioned embodiments all belong to the scope of protection of the present utility model.

[0072] For example, refer to Figure 2As shown, the second clamp arm 12 of this embodiment includes a clamping bottom 121 for engaging tissue and a side wall 122 provided on the side of the clamping bottom 121, and the first extension component 61 and the second extension component 62 are respectively connected to the side wall 122 on the corresponding side. Exemplarily, the connection ends of the first extension component 61 and the second extension component 62 away from the extension end can be directly connected to the side wall 122 by welding, or indirectly connected by other connecting parts, and the connection method is not limited thereto.

[0073] Reference Figure 2 and Figure 4 The valve clamping device 100 of the utility model further includes a driving assembly 2, which includes a pair of driving arms 23, one driving arm 23 is hinged to a second clamping arm 12, and the pair of driving arms 23 drives the pair of second clamping arms 12 to open or close. Further, the driving assembly 2 of this embodiment also includes a base 21 and a driving shaft 22 connected to the proximal end of the base 21. One end of the pair of driving arms 23 is rotatably hinged to the base 21, and the other end is respectively hinged to the corresponding second clamping arm 12 on the same side, and the axial movement of the driving shaft 22 can drive the pair of second clamping arms 12 to open or close relatively.

[0074] In other embodiments, when the expansion assembly includes both the front expansion arm and the rear expansion arm, the lower connecting sections of the front expansion arm and the rear expansion arm are connected, and the connected lower connecting sections simultaneously pass through a driving arm 23 and a second clamping arm 12, so that a driving arm 23 is hinged to a second clamping arm 12. This method not only realizes the hinge, but also does not require an additional fixing process to fix the expansion assembly, and the process and the overall structure are simple; the upper connecting sections on the other two sides can also refer to the above fixing method, for example, a through hole is set on the side wall 122 for the end of the upper connecting section to pass through so as to achieve connection. It should be understood that the connection method between the expansion arm and the second clamping arm 12 is not limited to this.

[0075] See also Figure 2 and Figure 4 as well as Figure 13 to Figure 15, the main clamping member and / or the expansion member 6 are coated with an outer membrane, and the main clamping member and / or the expansion member 6 are movably arranged inside the outer membrane. The outer membrane can prevent the metal surface of the valve clamping device from directly contacting the valve tissue, thereby reducing or avoiding tissue allergies and inflammatory reactions, avoiding damage to the clamped valve tissue, and facilitating tissue climbing. The outer membrane is loosely coated on the outer surface of the main clamping member and / or the expansion member 6 to avoid the outer membrane causing excessive constraints on the main clamping member and / or the expansion member 6 and affecting their activities. Loose here means that the outer membrane is not completely directly attached after coating, but there will be a certain movement or deformation between the two. Furthermore, a local inner membrane is provided on one side of the free end of the main clamping member and / or the expansion member 6, and the local inner membrane is located inside the outer membrane. The inner membrane of this embodiment is only partially set, which, on the one hand, avoids direct contact with the outer membrane during the rotation of the main clamping member 1 and the expansion member 6, thereby damaging the outer membrane (such as wearing out the outer membrane), thereby improving safety; on the other hand, compared with the overall double-layer setting, this method avoids the problem of the inner layer as a whole constraining and pulling the main clamping member and the expansion member when the overall double-layer setting is set, thereby ensuring the flexible rotation of the main clamping member and the expansion member; on the other hand, it avoids the problem of increasing the overall outer diameter of the clamping device due to the overall setting. Another aspect is that the local setting greatly reduces the cost of the coating and reduces the difficulty of the anti-wear process (for example, there is no need to locally process the outer membrane for anti-wear considerations).

[0076] Combination Figure 13 to Figure 15 As shown, the second clamping arm 12 of the main clamping member of this embodiment is covered with an outer film. In one embodiment, the surface of the second clamping arm 12 is covered with a first outer film 51a. The second free end 12b of the second clamping arm 12 can move in the first outer film 51a during the opening or closing process of the pair of second clamping arms 12. A first local inner film 51b is also provided on a part of the second free end 12b of the second clamping arm 12. The first local inner film 51b is located between the second clamping arm 12 and the first outer film 51a. In one embodiment, the surface of a pair of driving arms 23 and a base 21 are covered with a second outer film 52a. The pair of driving arms 23 can move in the second outer film 52a during the rotation process. A second local inner film 52b is also provided at the connection between the pair of driving arms 23 and the base 21. The second local inner film 52b is located between the driving component 2 and the second outer film 52a. For example, see Fig.16The expansion member 6 of this embodiment is coated with a third outer film 53a. The expansion member 6 can move in the third outer film 53a during the opening or closing process of the main clamping member and during its own expansion and contraction process. A third local inner film 53b is also provided on the part of the extended end of the expansion member 6, and the third local inner film 53b is located between the expansion member 6 and the third local inner film 53b. The first outer film 51a, the second outer film 52a and the third outer film 53a can be an integral structure or a split structure. The scope of the local setting of the utility model is that those skilled in the art can make adaptive settings based on the range of motion of the movable parts, aiming to achieve an anti-wear effect.

[0077] The first outer film 51a, the second outer film 52a and the third outer film 53a of the utility model are loosely coated on the outside of the second clamp arm 12, the outside of the driving arm 23 and the base 21 and the outside of the expansion member 6, respectively. The looseness here means that the outer film is not completely directly attached thereto after coating, but has a certain movement or deformation. The outer film can prevent the metal surface of the valve clamping device from directly contacting the valve tissue, thereby reducing or avoiding tissue allergies and inflammatory reactions, avoiding damage to the clamped valve tissue, and facilitating tissue crawling. Moreover, the loose coating allows the second clamp arm 12, the driving arm 23 and the expansion member to have a certain amount of movement in the first outer film 51a, the second outer film 52a and the third outer film 53a, thereby avoiding the first outer film 51a, the second outer film 52a and the third outer film 53a from causing excessive restraint and pulling on the second clamp arm 12, the driving arm 23 and the expansion member 6, respectively, thereby affecting their respective rotations and the opening and closing of the clamping device. The first local inner film 51b, the second local inner film 52b and the third local inner film 53b are locally arranged and located inside the outer film. On the one hand, it avoids the second clamping arm 12, the driving arm 23 and the extension member 6 from directly contacting the outer film during the activity and causing damage to the outer film (such as wearing through the outer film), thereby improving safety. On the other hand, compared with the overall double-layer arrangement, this method and the local arrangement can avoid the problem of the inner layer as a whole constraining and pulling the clamping arm, the driving arm and the extension member when the overall double-layer arrangement is used, thereby ensuring the flexible rotation of the clamping arm, the driving arm and the extension member. On the other hand, it avoids the problem of the overall outer diameter of the clamping device increasing due to the overall arrangement. Another aspect is that the local arrangement greatly reduces the cost of the coating and reduces the difficulty of the anti-wear process (for example, there is no need to locally treat the outer film for anti-wear considerations).

[0078] Reference Figure 2, an anchor 13 is provided on the first clamp arm 11, and the anchor 13 extends toward the second clamp arm 12 opposite thereto, and the anchor 13 can be anchored in the leaflet m between the two, and a plurality of anchors 13 are provided. The anchor 13 can have a tapered tip extending toward the leaflet binding surface, and the anchor 13 includes but is not limited to anchor thorns, barbs, bumps, etc. or a combination thereof. In this embodiment, the extension toward the opposite side refers to the extension toward the side opposite thereto, that is, toward the side of the leaflet binding surface, but is not limited to the extension perpendicular to the opposite side, and the angle of the extension can be any angle that allows the anchor 13 to be anchored.

[0079] Based on any of the above exemplary valve clamping devices 100, the present invention further provides a clamping system, which includes the valve clamping device 100 and a conveying component, wherein the conveying component is detachably connected to the valve clamping device 100.

[0080] The valve clamping device and clamping system of the utility model are provided with a deformable and self-expandable plugging piece. On the one hand, the main plugging part of the plugging piece cooperates with the clamping assembly to form a first plugging area, and on the other hand, the side plugging part fills the leak formed on the outside of the clamping to form a second plugging area. This method can effectively prevent the backflow at the junction of the leaflets, so that the clamping position of the valve clamping device is no longer limited, which is more conducive to ensuring the stability and safety of the clamping. Furthermore, when the plugging piece cooperates with the expansion component, the plugging piece can be completely contained inside the expansion component in the initial state, which is convenient for the overall sheathing of the device.

[0081] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the scope of the claims of the utility model.

Claims

1. A valve clamping device, characterized in that: It includes a clamping member for clamping leaflets and a sealing member that cooperates with the clamping member for sealing, the clamping member includes a pair of clamping components that can be opened or closed, the sealing member can be deformed and self-expanded, the sealing member includes a main sealing part and a side sealing part connected to the side of the main sealing part, a pair of the clamping components are relatively located on the outside of the main sealing part and can be opened or closed relative to the main sealing part, the main sealing part after self-expansion can cooperate with the clamping component when the clamping component is closed to form a first sealing area, the side sealing part after self-expansion extends along the width direction of the clamping member and can be filled in the leakage located on the adjacent side of the first sealing area when the clamping component is closed to form a second sealing area.

2. The valve clamping device according to claim 1, characterized in that: When the clamping assembly is closed, the side sealing member filled in the leak can adapt to the edge contour of the leak.

3. The valve clamping device according to claim 1, characterized in that: The side blocking portion is only arranged on one side of the main blocking portion so as to only fill a leak located on the side adjacent to the first blocking area to form the second blocking area.

4. The valve clamping device according to claim 1, characterized in that: The number of the side sealing parts is at least two, and the two side sealing parts are respectively arranged on both sides of the main sealing part to respectively fill the two leaks located on the two adjacent sides of the first sealing area to form two second sealing areas, wherein the two opposite side sealing parts after self-expansion are symmetrically or asymmetrically arranged.

5. The valve clamping device according to claim 1, characterized in that: The side blocking portion is more easily deformed than the main blocking portion.

6. The valve clamping device according to claim 5, characterized in that: The sealing member is formed by weaving braided wires, and the wire diameter or weaving density of the braided wires of the side sealing part is smaller than the wire diameter or weaving density of the braided wires of the main sealing part; or, the sealing member is formed by cutting, and the rod diameter or rod density of the side sealing part formed by cutting is smaller than the rod diameter or rod density of the main sealing part.

7. The valve clamping device according to claim 1, characterized in that: The side sealing part includes a filling part for filling the leak and a sealing disk for sealing the end of the leak. The filling part is located on the side of the axial middle area of ​​the main sealing part, and the sealing disk is located on the proximal side and / or distal side of the filling part.

8. The valve clamping device according to claim 7, characterized in that: The occluding disk includes a proximal occluding disk located at a proximal side of the filling portion and / or a distal occluding disk located at a distal side of the filling portion.

9. The valve clamping device according to claim 8, characterized in that: The proximal sealing disk, the filling portion and the distal sealing disk are connected in sequence axially and at least one of them is connected to the side of the main sealing portion. The disk surface of the proximal sealing disk and the disk surface of the distal sealing disk are larger than the sealing disk surface of the filling portion, so that a middle concave notch is formed at the edge contour of the side sealing portion.

10. The valve clamping device according to any one of claims 1 to 9, characterized in that: The clamping member also includes an expansion component for assisting in clamping the leaflet, the expansion component includes a first expansion component and a second expansion component, the first expansion component and the second expansion component are respectively connected to one of the clamping components, the first expansion component and the second expansion component connected to the clamping component respectively extend in the width direction of the clamping component connected thereto, and the extended parts tend to extend toward the opposite side; in an initial state, the blocking member is squeezed and accommodated inside the first expansion component and the second expansion component; when the first expansion component and the second expansion component are opened with a pair of the clamping components, the blocking member self-expands and causes the side blocking portion to extend out of the clamping member along the width direction of the clamping member; when the first expansion component and the second expansion component are closed again with a pair of the clamping components, the main blocking portion after self-expansion is located inside the first expansion component and the second expansion component and cooperates with the closed clamping component to form the first blocking area, while the side blocking portion after self-expansion is located outside the first expansion component and the second expansion component and fills in the leak located adjacent to the first blocking area to form the second blocking area.

11. The valve clamping device according to claim 10, characterized in that: The expansion component can be deformed, and the expansion component has an expanded state in a natural state and a contracted state after being squeezed; the blocking piece located on the inner side of the expansion component can be deformed by gathering inward as the expansion component is squeezed inward, and the blocking piece located on the inner side of the expansion component can self-expand when the expansion component is opened with the clamping component, so that the main blocking part is located on the inner side of the first expansion component and the second expansion component, and the side blocking part is located on the outer side of the first expansion component and the second expansion component.

12. The valve clamping device according to claim 11, characterized in that: In the expanded state, the first expansion component and the second expansion component are asymmetrically arranged relative to the central axis of the valve clamping device, and the extended end edge of the asymmetrically arranged first expansion component and the extended end edge of the second expansion component are staggered in the width direction of the clamping component.

13. The valve clamping device according to any one of claims 1 to 9, characterized in that: The surface of the clamping component is covered with a first outer film, the free end of the clamping component can move in the first outer film during the process of opening or closing the clamping component, and a first local inner film is also provided on a part of the free end of the clamping component, and the first local inner film is located between the clamping component and the first outer film; and / or, It also includes a driving component, which is engaged with a pair of clamping components to drive the pair of clamping components to open or close. The driving component includes a base, a driving shaft connected to the proximal end of the base and a pair of connecting arms connected to both sides of the base. One end of the pair of connecting arms is rotatably hinged on the base, and the other end is respectively hinged to the corresponding clamping components on the same side. The axial movement of the driving shaft can drive the pair of clamping components to open or close relatively. The surfaces of the pair of connecting arms and the base are covered with a second outer film. The pair of connecting arms can move in the second outer film during rotation. A second partial inner film is also provided at the connection between the pair of connecting arms and the base, and the second partial inner film is located between the driving component and the second outer film.

14. A clamping system, characterized in that: It comprises a valve clamping device and a conveying assembly as described in any one of claims 1 to 13, wherein the conveying assembly is detachably connected to the valve clamping device.

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