Valve clamping instrument

Abstract

The utility model provides a valve clamping instrument and a covering method of a valve clamping device, the valve clamping instrument comprises a covering assembly and the valve clamping device, and the covering assembly is used for covering the valve clamping device. The wrapping assembly comprises first wrapping cloth, the shape of the first wrapping cloth is matched with the outer contour of the valve clamping device, part of areas of the first wrapping cloth are connected to form a first wrapping sleeve, and the first wrapping sleeve wraps at least part of the outer contour of the valve clamping device. After the wrapping assembly wraps the valve clamping device, the overall size of the intervention sheath tube can be reduced, and the conveying difficulty of the valve clamping device is lowered. Meanwhile, the wrapping assembly has low requirements on the type and the material of the wrapping cloth, so that the manufacturing cost of the wrapping cloth can be reduced, and the economic benefit of the valve clamping instrument is improved.

Description

Technical Field

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

[0002] The atrioventricular valve is a one-way valve located between the atria and ventricles in the human heart. A normal and healthy atrioventricular valve can control the flow of blood from the atria to the ventricles, while preventing blood from flowing from the ventricles to the atria. The atrioventricular valve includes multiple leaflets. When the edges of adjacent leaflets are aligned, the atrioventricular valve can be completely closed, thereby preventing blood from flowing from the ventricles to the atria. When the leaflets of the atrioventricular valve or its related structures undergo organic or functional changes, it may lead to poor alignment of adjacent leaflets of the atrioventricular valve; when the ventricles of the heart contract, the atrioventricular valve cannot be completely closed, causing blood reflux (that is, blood flows back from the ventricles to the atria), which in turn causes a series of pathological changes.

[0003] At present, implanting a valve clip at the atrioventricular valve is one of the common methods for treating atrioventricular valve insufficiency. The existing valve clip uses the edge-to-edge surgical principle to deliver the clipping component to the atrioventricular valve through an interventional catheter, and allows the clipping component to simultaneously grasp the leaflets of the atrioventricular valve, thereby achieving the purpose of fixing the leaflets and reducing blood reflux.

[0004] In order to reduce the wear of the valve clip on the sheath when the valve clip passes through the interventional sheath, as well as the damage to the tissue caused by the valve clip, a covering sleeve is usually set on the outside of the valve clip to facilitate the implantation of the valve clip and the growth of surface tissue. The existing covering sleeve has a poor match with the valve clip. After covering the valve clip, material accumulation will form on the surface of the valve clip, which increases the size of the interventional sheath and further increases the difficulty of delivering the valve clip. Utility Model Content

[0005] The utility model aims to provide a valve clamping device and a method for covering a valve clamp. After the covering component of the valve clamping device is covered on the valve clamp, the overall size of the interventional sheath can be reduced and the difficulty of conveying the valve clamp can be reduced.

[0006] To achieve the above-mentioned purpose, the utility model provides a valve clamping device, which includes a valve clamp and a covering component, wherein the covering component includes a first covering cloth, the shape of which matches the external contour of the valve clamp, and a partial area of ​​the first covering cloth is connected to form a first covering sleeve, which covers at least a portion of the external contour of the valve clamp.

[0007] Optionally, the first covering cloth is a woven cloth, and the woven cloth can expand and contract in its own width direction and / or length direction, so that the first covering sleeve can be deformed to match the change of the opening and closing angle of the valve clamp.

[0008] Optionally, the valve clipper includes a transmission assembly and a clamping assembly; the number of the clamping assemblies is two, each of the clamping assemblies is connected to the transmission assembly and is used to rotate under the drive of the transmission assembly;

[0009] The first covering sleeve has a first covering area and a second covering area connected to each other; the number of the second covering areas is two, and the two second covering areas are respectively arranged on both sides of the first covering area along the length direction of the first wrapping cloth; the first covering area is sleeved on the transmission assembly, and each second covering area is sleeved on a corresponding one of the clamping assemblies.

[0010] Optionally, the transmission assembly includes a connecting rod and a base, there are two connecting rods, one end of each connecting rod is connected to the base, and the other end of each connecting rod is connected to a corresponding clamping assembly; after the base moves, it can synchronously drive the two connecting rods to rotate; the first covering area covers at least part of the outer contour of the connecting rod and at least part of the outer contour of the base.

[0011] Optionally, the first wrapping cloth is a flat woven cloth or a tubular woven cloth, and the first wrapping cloth includes a base covering section and two connecting rod covering sections; the shape of the connecting rod covering section matches the external contour of the connecting rod, and the shape of the base covering section matches the external contour of the base; the two connecting rod covering sections are respectively connected to the two ends of the base covering section in the length direction of the first wrapping cloth, and partial areas of the two connecting rod covering sections are connected to form the first covering area.

[0012] Optionally, the clamping assembly includes two clamp arms, each of which is connected to a corresponding connecting rod; the first wrapping cloth also has two clamp arm covering sections, each of which is connected to a corresponding connecting rod covering section, and the two clamp arm covering sections are symmetrically arranged with respect to the width direction of the first wrapping cloth; partial areas of each clamp arm covering section are connected to form the second covering area for sleeve-mounting the clamp arm.

[0013] Optionally, two edges of each connecting rod covering section that are relatively arranged in the width direction of the first wrapping cloth protrude outward to form a first folded edge and a second folded edge that are connected to each other, and the second folded edge is connected to the clamp arm covering section; the angle between each first folded edge and the length direction of the first wrapping cloth is 5° to 20°; the first folded edges in the two connecting rod covering sections are used to connect to form a first stitching area.

[0014] Optionally, the first wrapping cloth is a flat woven cloth, and the two edges of the clamp arm covering section are connected after folding to form a second stitching area extending in the length direction of the first wrapping cloth, and the end of the clamp arm covering section is used for stitching or bonding to form a third stitching area extending in the width direction of the first wrapping cloth; alternatively, the first wrapping cloth is a tubular woven cloth, and the end of the clamp arm covering section is used for stitching or bonding to form a fourth stitching area extending in the width direction of the first wrapping cloth.

[0015] Optionally, the covering assembly further includes fixing parts, each of which penetrates the clamp arm in the width direction of the first covering cloth and is used to be sewed with the first covering sleeve so that the first covering sleeve fits the surface of the clamp arm.

[0016] Optionally, the covering assembly further comprises a reinforcement member, wherein the reinforcement member is fixed in an end portion of the clamp arm covering section away from the connecting rod covering section, and / or the reinforcement member is fixed in the base covering section and the connecting rod covering section.

[0017] Optionally, the covering assembly further includes a second covering cloth, and the clamping assembly further includes a clamping arm, one end of the clamping arm is connected to the clamp arm, and the other end of the clamping arm is used to cooperate with the clamp arm to clamp the target tissue;

[0018] The shape of the second wrapping cloth matches the shape of the clamping arm, and partial areas of the second wrapping cloth are connected to form a second covering sleeve for sleeve-mounting the clamping arm.

[0019] Optionally, the clamping arm has a plurality of barbs, and the second covering sleeve is provided with a plurality of perforations, the positions of the perforations on the second covering sleeve correspond to the positions of the barbs on the clamping arm, and the perforations are used to allow a corresponding one of the barbs to pass through the interior of the second covering sleeve.

[0020] To achieve the above-mentioned purpose, the utility model further provides a method for coating a valve clamp, the method for coating a valve clamp comprising:

[0021] Providing a first wrapping cloth, so that the shape of the first wrapping cloth matches the shape of the valve clip;

[0022] connecting partial areas of the first wrapping cloth to form a first covering sleeve;

[0023] The first covering sleeve is covered on at least a portion of the outer contour of the valve clip.

[0024] Optionally, the valve clipper includes a transmission assembly and a clamping assembly, the clamping assembly includes a clamp arm, and the clamp arm is connected to the transmission assembly;

[0025] Wherein, the step of covering the first covering sleeve on at least a portion of the outer contour of the valve clip comprises:

[0026] Turning the first covering sleeve inside out so that the connection trace of the first covering cloth is placed inside the first covering sleeve;

[0027] The forceps arms are opened to cover the first covering sleeve on the valve clip.

[0028] Optionally, the clamping assembly includes two clamp arms, and the valve clamp includes a fixing member;

[0029] The coating method further comprises:

[0030] After the first covering sleeve is sleeved on the valve clip, the clamp arms are closed so that the angle between the extension lines of the two clamp arms is 5° to 150°;

[0031] The fixing piece is disposed on the clamp arm in a penetrating manner in a direction perpendicular to the extension direction of the clamp arm, and the fixing piece and the first covering sleeve are sewn together.

[0032] Optionally, the clamping assembly further includes a clamping arm, one end of which is connected to the clamp arm, and the other end of which is used to cooperate with the clamp arm to clamp the target tissue. The covering method further includes:

[0033] Providing a second wrapping cloth, wherein the second wrapping cloth is a tubular woven cloth, and the shape of the second wrapping cloth matches the shape of the clamping arm;

[0034] Wrapping the second wrapping cloth on the clamping arm;

[0035] Partial areas of the second wrapping cloth are connected to form a second covering sleeve that is sleeved on the clamping arm.

[0036] Optionally, the clamping arm has a plurality of barbs, and the second covering sleeve is provided with a plurality of perforations, and the positions of the perforations on the second covering sleeve correspond to the positions of the barbs on the clamping arm;

[0037] The step of wrapping the second wrapping cloth on the clamping arm comprises:

[0038] The second wrapping cloth is sleeved on the clamping arm along the protruding direction of the barbs until each barb protrudes out of the second wrapping cloth from a corresponding one of the through holes;

[0039] The second wrapping cloth is pulled in the opposite direction to the protruding direction of the barbs, so that each barb is completely extended out of a corresponding one of the through holes.

[0040] In the valve clamping device and the valve clamping device covering method provided by the utility model, the valve clamping device includes a valve clamping device and a covering component, the covering component includes a first covering cloth, the shape of the first covering cloth matches the external contour of the valve clamping device, a partial area of ​​the first covering cloth is connected to form a first covering sleeve, and the first covering sleeve covers at least a part of the external contour of the valve clamping device.

[0041] Since the shape of the first wrapping cloth matches the outer contour of the valve clip, the first wrapping cloth can be wrapped compactly on the valve clip, avoiding the accumulation of the wrapping material on the surface of the valve clip, thus reducing the overall size of the interventional sheath and reducing the difficulty of transporting the valve clip. At the same time, the wrapping assembly arranged in this way has low requirements on the type and material of the wrapping cloth. For example, when the wrapping assembly is prepared with a flat woven cloth, the manufacturing cost of the wrapping cloth can be reduced, and the economic benefits of the valve clipping device can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of a use scenario of a valve clip clamping a valve leaflet in a closed state in one embodiment of the utility model;

[0043] Figure 2a It is a schematic structural diagram of a valve clamp in an embodiment of the utility model, wherein the valve clamp is in a closed state;

[0044] Figure 2b It is a schematic diagram of the structure of the valve clipper in one embodiment of the utility model, wherein the valve clipper is in a partially expanded state;

[0045] Figure 2c This is a schematic diagram of the structure of a valve clip in an embodiment of the utility model, wherein the valve clip is in a fully expanded state;

[0046] Figure 2d This is a schematic structural diagram of a clamping arm of a valve clamp in one embodiment of the utility model;

[0047] Figure 3 It is a structural schematic diagram of a first wrapping cloth in a preferred embodiment of the utility model in an unfolded state, wherein the first wrapping cloth is a flat woven cloth, and the dotted line is the area to be sewn of the first wrapping cloth;

[0048] Figure 4 This is a structural schematic diagram of a first wrapping cloth in a preferred embodiment of the utility model in a sewing state, wherein the first wrapping cloth is a flat woven cloth, and the dotted line is the area to be sewn of the first wrapping cloth;

[0049] Figure 5 It is a structural schematic diagram of a preferred embodiment of the utility model in which the first wrapping cloth is in a sewing state, wherein the first wrapping cloth is a flat woven cloth, and the clamp arm covering section is in a sewing state;

[0050] Figure 6 It is a schematic diagram of the three-dimensional structure of the first covering sleeve of the covering component in a preferred embodiment of the utility model, wherein the sewing marks of the first covering sleeve are located on the outside of the covering component;

[0051] Figure 7a It is a schematic diagram of a top view of a tubular first wrapping cloth in a preferred embodiment of the utility model, wherein the dotted line is the area to be cut of the first wrapping cloth;

[0052] Figure 7b This is a bottom view of the structure of a tubular first wrapping cloth in a preferred embodiment of the utility model, wherein the dotted line is the area to be cut of the first wrapping cloth;

[0053] Figure 8 It is a three-dimensional structural schematic diagram of the first covering sleeve of the covering component in another preferred embodiment of the utility model, wherein the sewing marks of the first covering sleeve are located on the outside of the covering component;

[0054] Fig. 9 It is a structural schematic diagram of the sewing area of ​​the first covering sleeve in a preferred embodiment of the utility model;

[0055] Fig.10a This is a front view structural schematic diagram of a preferred embodiment of the utility model in which a covering component is sleeved on a valve clip;

[0056] Fig.10b This is a schematic diagram of an axial cross-sectional structure of a preferred embodiment of the utility model in which a covering component is sleeved on a valve clip;

[0057] Fig.11a This is a schematic diagram of the axial cross-sectional structure of a covering component and a valve clip in a preferred embodiment of the utility model, wherein a reinforcing sheet is provided on the covering component;

[0058] Fig.11b for Fig.11a A magnified view of part A;

[0059] Fig.11c for Fig.11a A magnified view of part B;

[0060] Fig.12 This is a schematic diagram of the three-dimensional structure of the second covering sleeve in a preferred embodiment of the utility model;

[0061] Fig.13It is a schematic diagram of the structure in which the second wrapping cloth is sleeved on the clamping arm in a preferred embodiment of the utility model, wherein the height of the perforations on the second wrapping cloth is higher than the height of the barbs of the clamping arm;

[0062] Fig.14 It is a schematic diagram of the structure in which the second wrapping cloth is sleeved on the clamping arm in another preferred embodiment of the utility model, wherein the barbed portion of the clamping arm extends out of a corresponding through hole on the second wrapping cloth;

[0063] Fig.15 It is a structural schematic diagram of a second wrapping cloth sleeved on a clamping arm in another preferred embodiment of the utility model, wherein the barbs of the clamping arm completely extend out of a corresponding through hole on the second wrapping cloth;

[0064] Fig.16 for Fig.13 Enlarged view of part C;

[0065] Fig.17 for Fig.14 A magnified view of part D in the middle;

[0066] Fig.18 It is a schematic diagram of the three-dimensional structure of the first covering sleeve of the covering component in a preferred embodiment of the utility model, wherein the sewing marks of the first covering sleeve are located on the inner side of the covering component;

[0067] Fig.19 This is a schematic structural diagram of a valve clamp and a covering component in a preferred embodiment of the utility model, wherein the covering component is sleeved on the valve clamp along the direction of the arrow;

[0068] Fig.20b It is a structural schematic diagram of a first mold and a first tubular wrapping cloth in a preferred embodiment of the utility model;

[0069] Fig.20a for Fig.20b Enlarged view of part E in the middle;

[0070] Fig.21 It is a schematic structural diagram of the second mold and the second wrapping cloth in a preferred embodiment of the utility model.

[0071] [Description of reference numerals is as follows]:

[0072] Covering assembly 1; first covering cloth 11; base covering section 111; connecting rod covering section 112; first folding edge 1121; second folding edge 1122; first stitching area 1123; clamp arm covering section 113; second stitching area 1131; third stitching area 1132; transverse edge 1133; longitudinal edge 1134; fourth stitching area 1135; first covering sleeve 12; first covering area 121; second covering area 122; fixing member 13; reinforcing member 14; second covering cloth 15; second covering sleeve 16; perforation 161; fifth stitching area 162;

[0073] Valve clip 2; transmission assembly 21; connecting rod 211; base 212; driving rod 213; clamping assembly 22; clamp arm 221; clamping arm 222; barb 223; target tissue 3; first mold 41; second mold 42. DETAILED DESCRIPTION

[0074] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0075] The orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected or connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the description of the present invention, the meaning of "multiple" is at least two, such as two or three or more, etc.

[0077] As used in this specification, "distal end" generally refers to the end of the valve clamp far away from the operator; the term "proximal end" is opposite to the "distal end" and generally refers to the end of the valve clamp close to the operator; the term "axial" refers to the direction along the axis of the drive rod; the term "circumferential" refers to the direction around the axis of the drive rod; the term "radial" refers to the direction perpendicular to the axis of the drive rod.

[0078] The present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the absence of conflict, the following embodiments and features in the embodiments may complement or be combined with each other.

[0079] First of all, it should be noted that in the prior art, the covering sleeve of the valve clip is mostly made of tubular knitted fabric, and the tubular knitted fabric has a slit in the middle, and the covering sleeve is placed on the valve clip from the slit. In this arrangement, since the shape of the covering sleeve is quite different from the outer contour of the covering component of the valve clip, material accumulation will form on the surface of the valve clip (for example, wrinkles will be formed on the outer surface), which will increase the overall size of the interventional sheath, thereby increasing the difficulty of transporting the valve clip. In addition, the use of tubular knitted fabric will also increase the manufacturing cost of the covering sleeve.

[0080] like Figure 1 to Figure 4 As shown, a preferred embodiment of the utility model provides a valve clipping device, which includes a covering component 1 and a valve clip 2, wherein the covering component 1 is used to cover the valve clip 2 and the outer contour of the valve clip 2. The valve clip 2 can be delivered to a predetermined position in the body and grasp the target tissue 3 (i.e., the native leaflet) to treat the regurgitation phenomenon caused by incomplete closure of adjacent leaflets.

[0081] It should be understood that the predetermined position refers to the target position in the body to which the valve clip 2 is delivered. In this embodiment, the predetermined position refers to the position of the mitral valve or the tricuspid valve. The target tissue 3 refers to the clamping position of the valve clip 2 after implantation. In this embodiment, the target tissue 3 refers to the leaflet of the mitral valve or the tricuspid valve.

[0082] Reference Figure 3 to Figure 6 As shown, the covering component 1 includes a first covering cloth 11, and the shape of the first covering cloth 11 matches the outer contour of the valve clip 2. The first covering cloth 11 is a plane figure, and after covering the valve clip 2, it needs to be self-connected to form a three-dimensional figure. Therefore, a part of the area of ​​the first covering cloth 11 is connected to form a first covering sleeve 12, and the first covering sleeve 12 covers at least part of the outer contour of the valve clip 2. When configured in this way, the shape of the first covering sleeve 12 matches the shape of the valve clip 2, so that the first covering sleeve 12 can fit the surface of the valve clip 2 more closely after being covered on the valve clip 2, thereby improving the matching degree between the first covering sleeve 12 and the valve clip 2.

[0083] In the coating component 1 provided in the present application, the shape of the first wrapping cloth 11 after cutting matches the outer contour of the valve clamp 2, so that the first wrapping cloth 11 can be compactly wrapped on the valve clamp 2, avoiding the accumulation of the coating material on the surface of the valve clamp 2, thereby reducing the overall size of the interventional sheath, reducing the difficulty of conveying the valve clamp 2, and thus reducing the damage to the blood vessels or heart during the access of the valve clamp 2, and improving the success rate of the patient's surgery and the safety during the operation. At the same time, the coating component 1 set up in this way has low requirements on the type and material of the wrapping cloth. For example, when the coating component 1 is prepared using a flat woven cloth, the manufacturing cost of the wrapping cloth can be reduced, and the economic benefits of the valve clamping device can be improved.

[0084] Reference Figure 1 As shown, the valve clip 2 includes a transmission component 21 and a clamping component 22. There are two clamping components 22; each clamping component 22 is connected to the transmission component 21 and is used to rotate under the drive of the transmission component 21 to clamp the target tissue 3. The covering component 1 is used to be sleeved on the outside of the transmission component 21 and the clamping component 22, which can reduce the wear of the valve clip 2 on the sheath when passing through the intervention sheath, and can reduce the damage to the tissue after the valve clip 2 is implanted.

[0085] Reference Figure 1 , Figure 2a to Figure 2c As shown, the transmission assembly 21 includes a connecting rod 211 and a base 212; there are two connecting rods 211; one end of each connecting rod 211 is connected to the base 212, and the other end of each connecting rod 211 is connected to a corresponding clamping assembly 22. After the base 212 moves, it can synchronously drive the two connecting rods 211 to rotate. The first covering sleeve 12 is used to cover at least part of the outer contour of the connecting rod 211 and at least part of the outer contour of the base 212.

[0086] Reference Figure 2a to Figure 2d As shown, the clamping assembly 22 includes a clamp arm 221 and a clamping arm 222. The number of the clamp arm 221 and the number of the clamp arm 222 are both two. Each clamp arm 221 is connected to a corresponding connecting rod 211, and one end of each clamping arm 222 is connected to the clamp arm 221. The clamp arm 221 is used to rotate under the drive of a corresponding connecting rod 211 to cooperate with the other end of the clamp arm 222 to clamp the target tissue 3.

[0087] It should be noted that in this embodiment, the predetermined position is the mitral valve, so the number of the connecting rod 211, the clamp arm 221 and the clamp arm 222 is 2, and each set of the clamp arm 222 and the clamp arm 221 can clamp one leaflet. When the predetermined position is the tricuspid valve, the number of the connecting rod 211, the clamp arm 221 and the clamp arm 222 can be 2 or 3.

[0088] In more detail, the transmission assembly 21 also includes a drive rod 213 (see Figure 1 ), the driving rod 213 extends in the vertical direction and is connected to the base 212. The two connecting rods 211 are symmetrically arranged about the axis of the driving rod 213. When the clamp arm 221 of the valve clamp 2 rotates, the base 212 of the valve clamp 2 can drive the clamp arm 221 to rotate through the connecting rod 211, and at this time the connecting rod 211 can rotate, that is, the connecting rod 211 can be in an open state (refer to Figure 2b ) or closed state (refer to Figure 1 and Figure 2a ).

[0089] In addition, the covering component 1 can preferably be respectively mounted on the forceps arm 221 and the clamping arm 222, which can facilitate the growth of human tissue on the surface of the covering component 1 to achieve a long-term treatment effect.

[0090] Preferably, the first wrapping cloth 11 is a woven cloth, which can expand and contract in its width direction and / or length direction, so that the first covering sleeve 12 sleeved on the valve clamp 2 can be deformed in accordance with the change of the opening and closing angle of the valve clamp 2.

[0091] Since the first covering sleeve 12 is covered on the outside of the connecting rod 211, the first covering cloth 11 configured in this way can stretch in its own width direction and / or length direction when the connecting rod 211 is opened, so that the first covering cloth 11 can adapt to the deformation of the connecting rod 211; at the same time, the first covering cloth 11 can also shrink in its own width direction and / or length direction when the connecting rod 211 is closed, so as to restrain the connecting rod 211 when the connecting rod 211 is closed, so as to make the covering compact and avoid the accumulation of covering material on the surface of the connecting rod 211.

[0092] Reference Figure 6 As shown, combined with Figure 1 The first covering sleeve 12 has a first covering area 121 and a second covering area 122 connected to each other. The number of the second covering areas 122 is two, and the two second covering areas 122 are respectively along the length direction a of the first covering cloth 11 (refer to Figure 3 ) are arranged on both sides of the first covering area 121, that is, the two second covering areas 122 are symmetrically arranged about the first covering area 121. The first covering area 121 is sleeved on the transmission assembly 21, that is, the first covering area 121 is sleeved on the outside of the connecting rod 211 and the base 212 to cover the connecting rod 211 and the base 212. The second covering area 122 is used to be sleeved on a corresponding clamping assembly 22. Specifically, each second covering area 122 is used to be sleeved on the outside of a corresponding clamp arm 221 to cover the clamp arm 221.

[0093] Reference Figure 3 to Figure 6As shown, in a preferred embodiment, the first wrapping cloth 11 is a flat woven cloth, and the first wrapping cloth 11 includes a base covering section 111 and two connecting rod covering sections 112. For example, the first wrapping cloth 11 can be cut to form a base covering section 111 and two connecting rod covering sections 112. The shape of the connecting rod covering section 112 matches the outer contour of the connecting rod 211, and the shape of the base covering section 111 matches the outer contour of the base 212. The two connecting rod covering sections 112 are respectively connected to the two ends of the base covering section 111 in the length direction a of the first wrapping cloth 11, and the two connecting rod covering sections 112 are symmetrically arranged with respect to the width direction b of the first wrapping cloth 11. Partial areas of the two connecting rod covering sections 112 are connected to form a first covering area 121.

[0094] Reference Figure 7a and Figure 7b In another preferred embodiment, the first wrapping cloth 11 is a tubular woven cloth, and the first wrapping cloth 11 is cut along the dotted line in the figure to form a base covering section 111 and two connecting rod covering sections 112, and the two connecting rod covering sections 112 are respectively connected to the base covering section 111 at both ends of the first wrapping cloth 11 in the length direction a. Figure 8 As shown, partial regions of the two connecting rod covering sections 112 are connected to form a first covering area 121 .

[0095] In more detail, the areas of the two connecting rod covering sections 112 that are symmetrically arranged with respect to the width direction b of the first covering cloth 11 are used for sewing or bonding to form the first covering area 121 .

[0096] Reference Figure 3 and Figure 7a As shown, the first wrapping cloth 11 further has two clamp arm covering sections 113, each clamp arm covering section 113 is connected to a corresponding connecting rod covering section 112, and the two clamp arm covering sections 111 are symmetrically arranged with respect to the width direction b of the first wrapping cloth 11. Partial areas of each clamp arm covering section 113 are connected (e.g., sewn or bonded) to form a second covering area 122 for sleeve-mounting the clamp arm 221.

[0097] Continue to refer to Figure 3 In a specific embodiment, the two edges of each connecting rod covering section 112 that are oppositely arranged in the width direction b of the first covering cloth 11 both protrude outward to form a first folded edge 1121 and a second folded edge 1122 that are connected to each other, and the second folded edge 1122 is connected to the clamp arm covering section 113.

[0098] Reference Figure 3 and Figure 4As shown, the first folded edges 1121 in the two connecting rod covering sections 112 are used to connect to form a first stitching area 1123. In this embodiment, the two first folded edges 1121 in the two connecting rod covering sections 112 symmetrically arranged about the width direction b of the first wrapping cloth 11 are connected to form the first stitching area 1123.

[0099] Reference Figure 3 As shown, in order to adapt to the shape of the two connecting rods 211 when rotating, the angle θ between the first folded edge 1121 of each connecting rod covering section 112 and the length direction a of the first wrapping cloth 11 is less than 50°.

[0100] More preferably, the angle θ between the first folded edge 1121 and the length direction a of the first wrapping cloth 11 is 5° to 20°.

[0101] Return to reference Figure 1 After the valve clip 2 is closed, the angle β between the extension lines of the two clamp arms 221 is 5° to 150°, more preferably 20° to 60°. That is to say, after the valve clip 2 clamps the target tissue 3, the angle β between the extension directions of the two clamp arms 221 is preferably 20° to 60°.

[0102] During actual cutting, the angle θ between the first folded edge 1121 and the length direction a of the first wrapping cloth 11 can be set according to the angle β between the two clamp arms 221 when the valve clip 2 is closed, so that the first covering sleeve 12 fits the surface of the connecting rod 211 more closely.

[0103] Reference Figure 5 As shown, in a preferred embodiment, the first wrapping cloth 11 is a flat woven cloth, and the two edges of the clamp arm covering section 113 (for example, the two edges of the clamp arm covering section 113 that are arranged opposite to each other in the width direction b of the first wrapping cloth 11) are used to be connected after folding to form a second stitching area 1131 extending in the length direction a of the first wrapping cloth 11. The end of the clamp arm covering section 113 (for example, the end of the clamp arm covering section 113 away from the connecting rod covering section 112) is used to be stitched or bonded to form a third stitching area 1132 extending in the width direction b of the second wrapping cloth 11. The first wrapping cloth 11 is stitched at the first stitching area 1123, the second stitching area 1131 and the third stitching area 1132 respectively to form the first covering sleeve 12.

[0104] For more details, see Figure 3 As shown, the clamp arm covering section 113 has two lateral edges 1133 parallel to the length direction a of the first wrapping cloth 11 and a longitudinal edge 1134 parallel to the width direction b of the first wrapping cloth 11, and the two lateral edges 1133 form a second stitching area 1131 after folding and sewing or bonding, and the longitudinal edge 1134 forms a third stitching area 1132 after sewing or bonding.

[0105] Reference Figure 8 As shown, in another preferred embodiment, the clamp arm covering section 113 is a tubular woven cloth, and the end of the clamp arm covering section 113 (for example, the end of the clamp arm covering section 113 away from the connecting rod covering section 112) is used for stitching or bonding to form a fourth stitching area 1135 extending in the length direction a of the first covering cloth 11.

[0106] Specifically, when the first wrapping cloth 11 is a tubular woven cloth, the first stitching area 1123 and the fourth stitching area 1135 of the first wrapping cloth 11 may be stitched to form the first covering sleeve 12 .

[0107] The present application does not limit the connection method of the sewing area in the first wrapping cloth 11. The edges of the first wrapping cloth 11 can be connected by sewing, bonding or welding, and can also be connected by other suitable methods. In addition, if the two edges of the first wrapping cloth 11 are connected by sewing, the two edges can be connected by folding in half and then sewing (refer to Figure 6 and Figure 8 ), the two edges can also be connected by pressing each other (refer to Fig. 9 ).

[0108] Reference Fig.10a and Fig.10b As shown, the covering assembly 1 further includes a fixing member 13 , which penetrates the clamp arm 221 in the width direction b of the first covering cloth 11 and is used to be sewed with the first covering sleeve 12 so that the first covering sleeve 12 fits the surface of the clamp arm 221 .

[0109] In this embodiment, the number of fixing members 13 corresponds to the number of clamp arms 221. The covering assembly 1 is covered on the valve clamp 2. After the valve clamp 2 is closed, the fixing member 13 passes through a corresponding clamp arm 221 in the width direction b of the first wrapping cloth 11, and the two ends of the fixing member 13 are used to be sutured on the first covering sleeve 12.

[0110] When the base 212 drives the clamp arm 221 to rotate through the connecting rod 211, when the angle between the extension lines of the two clamp arms 221 is too large (i.e., when the opening and closing angle of the valve clip 2 is large), the first covering sleeve 12 may become redundant and no longer fit on the surface of the clamp arm 221. After the valve clip 2 is closed, the fixing member 13 is sutured on the first covering sleeve 12. Since the working state of the valve clip 2 is the closed state, such a configuration, on the one hand, makes the first covering sleeve 12 fit more closely to the valve clip 2 in the closed state to prevent the first covering sleeve 12 from being piled up and redundant; on the other hand, the first covering sleeve 12 can always be close to the surface of the clamp arm 221 during the rotation of the clamp arm 221 to prevent the first covering sleeve 12 from wrinkling on the surface of the valve clip 2 during the process of the valve clip 2 capturing the valve leaflet.

[0111] Reference Figure 11a to Figure 11c As shown, in a preferred embodiment, the covering component 1 further includes a reinforcing member 14, and the reinforcing member 14 may be in the shape of a sheet or a block. Fig.11b As shown in FIG. 1 , in a specific example, the reinforcement member 14 is fixed in the end of the clamp arm covering section 113 away from the connecting rod covering section 112 . Fig.11c As shown, in another specific example, the reinforcement member 14 is fixed in the base covering section 111 and the connecting rod covering section 112 .

[0112] Reference Fig.11a As shown, in another specific example, the reinforcement member 14 is fixed in the end of the clamp arm covering section 113 away from the connecting rod covering section 112, and is fixed in the base covering section 111 and the connecting rod covering section 112 to increase the wear resistance of the end of the valve clip 2. With this arrangement, on the one hand, the wear resistance of the valve clip 2 when passing through the sheath can be improved to avoid damage to the first covering sleeve 12; on the other hand, the improvement of the wear resistance of the end of the first covering sleeve 12 can enable the first covering sleeve 12 to be prepared with a thinner woven cloth to adapt to a smaller sheath and improve the passability of the valve clip 2 in the interventional sheath.

[0113] In the prior art, since the valve clip is an interventional instrument, the clamping arm of the valve clip has a plurality of barbs. The existing covering cloth is prepared by woven cloth and sewn together. When the covering cloth is actually inserted, the covering cloth can only be inserted and moved along the protruding direction of the barbs, and cannot be retracted in the opposite direction of the protruding direction of the barbs, thus causing difficulty in inserting.

[0114] In addition, after the covering cloth is put on the clamping arm, the barbs need to extend from the gaps on the woven cloth. Due to the large number of barbs and the flexible structure of the covering cloth, some barbs will be deformed in the axial direction after the covering cloth is actually put on, making it difficult to ensure that all barbs can extend out of the covering cloth at the predetermined position. When the barbs do not extend out at the predetermined position, some barbs may not extend completely or even fail to extend, causing the clamping arm to be unable to effectively grasp the leaflet.

[0115] Reference Fig.12 As shown, the covering assembly 1 further includes a second covering cloth 15, the shape of which matches the shape of the clamping arm 222, and a portion of the second covering cloth 15 is connected to form a second covering sleeve 16 for sleeve-mounting the clamping arm 222. When sleeve-mounting is actually performed, the second covering cloth 15 can be sleeved on the clamping arm 222 first, and then the end of the second covering cloth 15 can be sewed or bonded after the sleeve-mounting is completed to form the second covering sleeve 16.

[0116] For more details, see Fig.12 As shown, the second wrapping cloth 15 is a tubular woven cloth, and the end of the second wrapping cloth 15 away from the connecting rod covering section 112 is used for sewing or bonding to form a fifth sewing area 162.

[0117] The present application does not limit the material of the second covering sleeve 16. The second covering sleeve 16 can be formed by folding a flat woven cloth and sewing or bonding the flat woven cloth. The second covering sleeve 16 can also be formed by sewing or bonding the ends of the tubular woven cloth.

[0118] Reference Figure 13 to Figure 17 As shown, combined with Figure 1 In a preferred embodiment, the clamping arm 222 has a plurality of barbs 223, and the second covering sleeve 16 is provided with a plurality of perforations 161. The positions of the perforations 161 on the second covering sleeve 16 correspond to the positions of the barbs 223 on the clamping arm 222. The perforations 161 are used to allow a corresponding barb 223 to pass through the interior of the second covering sleeve 16.

[0119] The second covering sleeve 16 provided in the present application has a perforation 161 thereon, so that the barbs 223 can all extend out of the second covering sleeve 16 at the position of the perforation 161. On the one hand, the second covering sleeve 16 can be tightly covered, thereby reducing the overall size of the clamping arm 222 after being covered, which is beneficial to the overall implantation of the valve clamp 2 and has good interventional performance. On the other hand, the barbs 223 can be fully extended, which helps the clamping arm 222 to firmly and effectively grasp the leaflets, thereby improving the reliability of the valve clamp 2 in grasping the leaflets.

[0120] A preferred embodiment of the present invention further provides a method for covering a valve clip. In a non-limiting operation, taking a valve clip 2 for capturing two leaflets as an example, the method for covering the valve clip 2 includes:

[0121] Step 1: Reference Figure 3 , Figure 7a and Figure 7b , providing a first wrapping cloth 11 , the shape of which matches the shape of the valve clip 2 .

[0122] Step 2: Reference Figure 6 and Figure 8 , partial areas of the first wrapping cloth 11 are connected to form a first covering sleeve 12 .

[0123] Step 3: Reference Fig.19 , the first covering sleeve 12 is covered on at least part of the outer contour of the valve clip 2. This can avoid the accumulation of covering materials on the surface of the valve clip 2, and can also reduce the overall size of the interventional sheath and reduce the difficulty of transporting the valve clip 2.

[0124] Reference Figure 1 , Figure 2a to Figure 2dAs shown, the valve clipper 2 includes a transmission assembly 21 and a clamping assembly 22 . The clamping assembly 22 includes a clamp arm 221 , and the clamp arm 221 is connected to the transmission assembly 21 .

[0125] Preferably, the step of covering the first covering sleeve 12 on at least a portion of the outer contour of the valve clip 2 comprises:

[0126] Reference Fig.18 The first covering sleeve 12 is turned inside out so that the connection marks (such as suturing or bonding marks) of the first covering sleeve 11 are placed inside the first covering sleeve 12, thereby preventing the connection marks of the first covering sleeve 11 from damaging human tissue after implantation.

[0127] Reference Fig.19 , open the clamp arm 221 of the valve clamp 2, for example, the clamp arm 221 of the valve clamp 2 can be opened to the maximum angle, so as to sleeve the first covering sleeve 12 on the valve clamp 2. When the valve clamp 2 is in the open state and then sleeves the covering component 1, it can make it easier to sleeve the covering component 1.

[0128] Reference Fig.10a and Fig.10b As shown, combined with Figure 1 The clamping assembly 22 includes two clamp arms 221, and the valve clamp 2 includes a fixing member 13, which passes through the clamp arms 221 in the width direction of the first wrapping cloth 11 and is used to sew with the first covering sleeve 12 so that the first covering sleeve 12 fits the surface of the clamp arms 221.

[0129] Preferably, the method for covering the valve clip 2 further comprises:

[0130] Reference Fig.10a and Fig.10b After the first covering sleeve 12 is sleeved on the valve clamp 2, the clamp arms 221 of the valve clamp 2 are closed, so that the angle β between the extension lines of the two clamp arms 221 is 5° to 150°.

[0131] Reference Fig.10b and Fig.11a As shown, combined with Figure 1 After closing the valve clamp 2, the fixing piece 13 is penetrated and set on the clamp arm 221, and the fixing piece 13 and the first covering sleeve 12 are sutured so that the first covering sleeve 12 is always close to the surface of the valve clamp 2 during the rotation of the clamp arm 221.

[0132] Reference Figure 1 , Figure 2a to Figure 2dThe transmission assembly 21 includes a connecting rod 211 and a base 212; there are two connecting rods 211; one end of each connecting rod 211 is connected to the base 212, and the other end of each connecting rod 211 is connected to a corresponding clamping assembly 22. After the base 212 moves, it can synchronously drive the two connecting rods 211 to rotate.

[0133] Preferably, the step of providing the first wrapping cloth 11 comprises:

[0134] Reference Figure 3 to Figure 8 As shown, in a specific embodiment, the middle portion of the first wrapping cloth 11 is cut to form a clamp arm covering section 113, a connecting rod covering section 112 and a base covering section 111 which are sequentially connected in the length direction a of the first wrapping cloth 11, the number of the clamp arm covering section 113 and the connecting rod covering section 112 is two, the two clamp arm covering sections 113 and the two connecting rod covering sections 112 are symmetrically arranged on both sides of the base covering section 111; the shape of the connecting rod covering section 112 matches the outer contour of the connecting rod 211 and is used to be sleeved on the outside of the connecting rod 211, and the shape of the base covering section 111 matches the outer contour of the base 212 and is used to be sleeved on the outside of the base 212.

[0135] Furthermore, partial areas of the two connecting rod covering segments 112 are connected, and partial areas of each clamp arm covering segment 113 are connected to form a first covering sleeve 12 for covering the valve clip 2 .

[0136] Reference Fig.20a and Fig.20b As shown, combined with Figure 7a to Figure 8 In a specific example, the step of cutting the middle portion of the first wrapping cloth 11 includes:

[0137] The first wrapping cloth 11 is a tubular woven cloth, and the first mold 41 is set inside the first wrapping cloth 11, and the first wrapping cloth 11 is cut to form the connecting rod covering section 112 and the base covering section 111. The first mold 41 is withdrawn, and the first stitching area 1123 and the fourth stitching area 1135 are stitched to form the first covering sleeve 12.

[0138] Optionally, the step of connecting a portion of each clamp arm covering segment 113 to form a first covering sleeve 12 for covering the valve clip 2 includes:

[0139] Refer to Figure 2~ Figure 6 As shown, in a preferred embodiment, the first wrapping cloth 11 is a flat woven cloth, and the two edges of each clamp arm covering section 113 that are opposite to each other in the width direction b of the first wrapping cloth 11 are folded and then sewn or bonded, and the end of each clamp arm covering section 113 is sewn or bonded to form a part of the first covering sleeve 12 for sleeve-mounting the clamp arm 221.

[0140] Reference Figure 7a to Figure 8 As shown, in another preferred embodiment, the first covering cloth 11 is a tubular woven cloth, and the end of each clamp arm covering section 113 is sewn or bonded to form a portion of the first covering sleeve 12 for covering the clamp arm 221 .

[0141] Reference Figure 1 , Figure 2a to Figure 2d The clamping assembly 22 also includes a clamping arm 222 , one end of which is connected to the clamp arm 221 , and the other end of the clamping arm 222 is used to cooperate with the clamp arm 221 to clamp the target tissue 3 .

[0142] In order to cover the clamping arm 222 of the valve clamp 2, the covering method of the valve clamp 2 includes:

[0143] Step 1: Reference Fig.12 and Fig.21 , and combined with Figure 2d , provide a second wrapping cloth 15, the second wrapping cloth 15 is a tubular woven cloth, and the shape of the second wrapping cloth 15 matches the shape of the clamping arm 222.

[0144] Step 2: Reference Figure 13 to Figure 15 , wrap the second wrapping cloth 15 on the clamping arm 222.

[0145] Step 3: Reference Fig.12 , and combined with Figure 13 to Figure 15 , a partial area of ​​the second wrapping cloth 15 is connected to form a second covering sleeve 16 that is sleeved on the clamping arm 222.

[0146] Reference Fig.12 and Fig.21 , and combined with Figure 2d The clamping arm 222 has a plurality of barbs 223 , and the second covering sleeve 16 is provided with a plurality of through holes 161 . The positions of the through holes 161 on the second covering sleeve 16 correspond to the positions of the barbs 223 on the clamping arm 222 .

[0147] Preferably, the step of providing the second wrapping cloth 15 comprises:

[0148] Reference Fig.12 and Fig.21 , and combined with Figure 2d A second mold 42 is sleeved in the tubular second wrapping cloth 15 , and a plurality of perforations 161 are cut on the second wrapping cloth 15 , and the cutting positions of the perforations 161 on the second covering sleeve 16 correspond to the positions of the barbs 223 on the clamping arm 222 .

[0149] Preferably, the step of wrapping the second wrapping cloth 15 on the clamping arm 222 includes:

[0150] Reference Figure 13 to Figure 17The second wrapping cloth 15 is sleeved on the clamping arm 222 along the protruding direction of the barbs 223 until each barb 223 extends out of the second wrapping cloth 15 from a corresponding through hole 161 .

[0151] Reference Fig.15 , pull the second wrapping cloth 15 in the opposite direction of the protruding direction of the barbs 223 , so that each barb 223 completely extends out of a corresponding through hole 161 .

[0152] Such a configuration, on the one hand, can make the second covering sleeve 16 cover tightly, thereby reducing the overall size of the clamping arm 222 after being covered, which is beneficial to the overall implantation of the valve clamp 2 and has good intervention performance; on the other hand, it can make the barb 223 fully extended, which helps the clamping arm 222 to firmly and effectively grasp the leaflet, thereby improving the reliability of the valve clamp 2 in grasping the leaflet.

[0153] Preferably, the step of making each barb 223 extend out of the second packing cloth 15 from a corresponding perforation 161 further includes:

[0154] Reference Fig.13 and Fig.16 The second wrapping cloth 15 is sleeved on the clamping arm 222 along the protruding direction of the barbs 223 until each through hole 161 is adjacent to a corresponding barb 223 .

[0155] Reference Figure 14 to Figure 17 As shown, each perforation 161 is pulled along the extension direction of the barb 223 so that each barb 223 extends out of the second packing cloth 15 from a corresponding perforation 161 .

[0156] Optionally, the step of connecting a portion of the second wrapping cloth 15 to form a second wrapping sleeve 16 sleeved on the clamping arm 222 includes:

[0157] Reference Fig.12 The ends of the second wrapping cloth 15 are fixedly connected to form a second covering sleeve 16. At this time, the shape of the second covering sleeve 16 matches the shape of the clamping arm 222, so that the second covering sleeve 16 is tightly wrapped on the clamping arm 222, thereby reducing the difficulty of transporting the valve clip 2.

[0158] In summary, in the valve clamping device provided by the utility model, the shape of the covering component 1 after cutting matches the outer contour of the valve clamp 2, so that the first wrapping cloth 11 is wrapped compactly on the valve clamp 2, avoiding the accumulation of the covering material on the surface of the valve clamp 2, thereby reducing the overall size of the interventional sheath and reducing the difficulty of conveying the valve clamp 2. At the same time, the covering component 1 set in this way has low requirements on the type and material of the wrapping cloth. When the covering component 1 is prepared by a flat woven cloth, the manufacturing cost of the wrapping cloth can be reduced, and the economic benefits of the valve clamping device can be improved.

[0159] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation to the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the protection scope of the utility model.

Claims

1. A valve clipping device, characterized in that: It includes a valve clamp and a covering component, wherein the covering component includes a first covering cloth, the shape of the first covering cloth matches the outer contour of the valve clamp, a partial area of ​​the first covering cloth is connected to form a first covering sleeve, and the first covering sleeve covers at least a part of the outer contour of the valve clamp.

2. The valve clipping device according to claim 1, characterized in that: The first covering cloth is a woven cloth, and the woven cloth can stretch in its own width direction and / or length direction, so that the first covering sleeve can be deformed in accordance with the change of the opening and closing angle of the valve clip.

3. The valve clipping device according to claim 1, characterized in that: The valve clipper comprises a transmission assembly and a clamping assembly; the number of the clamping assemblies is two, each of the clamping assemblies is connected to the transmission assembly and is used to rotate under the drive of the transmission assembly; The first covering sleeve has a first covering area and a second covering area connected to each other; the number of the second covering areas is two, and the two second covering areas are respectively arranged on both sides of the first covering area along the length direction of the first wrapping cloth; the first covering area is sleeved on the transmission assembly, and each second covering area is sleeved on a corresponding one of the clamping assemblies.

4. The valve clipping device according to claim 3, characterized in that: The transmission assembly includes a connecting rod and a base, the number of the connecting rods is two, one end of each connecting rod is connected to the base, and the other end of each connecting rod is connected to a corresponding one of the clamping assemblies; After the base moves, it can synchronously drive the two connecting rods to rotate; The first covering area covers at least a portion of an outer contour of the connecting rod and at least a portion of an outer contour of the base.

5. The valve clipping device according to claim 4, characterized in that: The first wrapping cloth is a flat woven cloth or a tubular woven cloth, and the first wrapping cloth includes a base covering section and two connecting rod covering sections; the shape of the connecting rod covering section matches the external contour of the connecting rod, and the shape of the base covering section matches the external contour of the base; the two connecting rod covering sections are respectively connected to the two ends of the base covering section in the length direction of the first wrapping cloth, and partial areas of the two connecting rod covering sections are connected to form the first covering area.

6. The valve clipping device according to claim 5, characterized in that: The clamping assembly includes two clamp arms, each of which is connected to a corresponding connecting rod; the first wrapping cloth also has two clamp arm covering sections, each of which is connected to a corresponding connecting rod covering section, and the two clamp arm covering sections are symmetrically arranged with respect to the width direction of the first wrapping cloth; partial areas of each clamp arm covering section are connected to form the second covering area for sleeve-mounting the clamp arm.

7. The valve clipping device according to claim 6, characterized in that: The two edges of each connecting rod covering section that are opposite to each other in the width direction of the first covering cloth protrude outward to form a first folded edge and a second folded edge that are connected to each other, and the second folded edge is connected to the clamp arm covering section; the angle between each first folded edge and the length direction of the first covering cloth is 5° to 20°; the first folded edges in the two connecting rod covering sections are used to connect to form a first stitching area.

8. The valve clipping device according to claim 7, characterized in that: The first wrapping cloth is a flat woven cloth, the two edges of the clamp arm covering section are used to be connected after folding to form a second stitching area extending in the length direction of the first wrapping cloth, and the end of the clamp arm covering section is used to be stitched or bonded to form a third stitching area extending in the width direction of the first wrapping cloth. Alternatively, the first wrapping cloth is a tubular woven cloth, and the end of the clamp arm covering section is used for sewing or bonding to form a fourth sewing area extending in the width direction of the first wrapping cloth.

9. The valve clipping device according to any one of claims 6 to 8, characterized in that: It also includes a fixing piece, which penetrates the clamp arm in the width direction of the first wrapping cloth and is used for sewing with the first covering sleeve so that the first covering sleeve fits the surface of the clamp arm.

10. The valve clipping device according to any one of claims 6 to 8, characterized in that: It also includes a reinforcement member, which is fixed in the end of the clamp arm covering section away from the connecting rod covering section, and / or the reinforcement member is fixed in the base covering section and the connecting rod covering section.

11. The valve clipping device according to any one of claims 6 to 8, characterized in that: It also includes a second wrapping cloth, and the clamping assembly also includes a clamping arm, one end of the clamping arm is connected to the clamp arm, and the other end of the clamping arm is used to cooperate with the clamp arm to clamp the target tissue; The shape of the second wrapping cloth matches the shape of the clamping arm, and partial areas of the second wrapping cloth are connected to form a second covering sleeve for sleeve-mounting the clamping arm.

12. The valve clipping device according to claim 11, characterized in that: The clamping arm is provided with a plurality of barbs, and the second covering sleeve is provided with a plurality of through holes, the positions of the through holes on the second covering sleeve correspond to the positions of the barbs on the clamping arm, and the through holes are used to allow a corresponding one of the barbs to pass out from the interior of the second covering sleeve.

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