Valve repair clamp

Abstract

The present application belongs to the technical field of medical devices, and particularly relates to a valve repair clamp. The valve repair clamp comprises: an upper clamp body with an upper clamp arm; a lower clamp body with a lower clamp arm; a sleeve that sheaths the upper clamp body and the lower clamp body, and at least the distal end of the upper clamp body and the lower clamp body extends from the distal end of the sleeve; the upper clamp arm is provided with a plurality of upper engagement teeth, the middle upper engagement tooth is the center tooth, the distal and proximal upper engagement teeth are side teeth, and the side teeth are inclined to converge to the center tooth. The valve repair clamp can better push the lower engagement teeth when the upper clamp body is pushed to the distal end, and then the lower clamp body is smoothly pushed out of the sleeve to the distal end; when the upper clamp body is pushed back to the proximal end, the lower engagement teeth at the distal end of the lower clamp body can be pushed back to smoothly return the lower clamp body to the sleeve, and the valve leaflets can be more reliably clamped.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a valve repair clamp. Background Technology

[0002] With social development, the aging population is becoming increasingly serious, and various diseases caused by population aging, such as heart diseases, are receiving widespread attention, especially blood reflux caused by valvular insufficiency.

[0003] Valve repair clips have gained more attention due to their ability to preserve the native valve and their wide applicability. However, existing valve repair clips, especially transapical mitral or tricuspid valve clips, currently available devices for heart valve clipping have the following problems, such as:

[0004] (1) The conveyor cannot effectively pull out the lower clamp during the process of pushing the upper clamp out of the sleeve, which causes the lower clamp to fail to open.

[0005] (2) After the leaflet is captured, the valve repair clamp cannot effectively retract the lower clamp into the sleeve, resulting in the valve repair clamp not being able to properly clamp the leaflet after capturing it. Summary of the Invention

[0006] This invention addresses the technical problem of existing valve repair clamps failing to open the lower clamp during transport or failing to properly retract and clamp the valve leaflets after capture, and aims to provide a valve repair clamp.

[0007] A valve repair clamp, comprising:

[0008] An upper clamping body has at least one pair of upper clamping arms;

[0009] The lower clamping body has a lower clamping arm that cooperates with the upper clamping arm;

[0010] A sleeve that gathers the upper clamp and the lower clamp, with at least the distal ends of the upper clamp and the lower clamp extending from the distal end of the sleeve;

[0011] The upper clamping arm is provided with:

[0012] A plurality of upper meshing teeth are located on one side of the upper clamping arm facing the lower clamping arm. Among the plurality of upper meshing teeth, the middle upper meshing tooth is the center tooth, and the distal and proximal upper meshing teeth are the side teeth. The side teeth are inclined and converge toward the center tooth.

[0013] As a preferred embodiment, the lower clamping arm is provided with:

[0014] A plurality of lower meshing teeth are located on the side of the lower clamping arm facing the upper clamping arm, and the lower meshing teeth and the upper meshing teeth engage to capture the leaflet.

[0015] As a preferred embodiment, when the number of upper meshing teeth is odd, the center tooth is the middle upper meshing tooth;

[0016] When the number of upper meshing teeth is even, the center teeth are the two middle upper meshing teeth.

[0017] As a preferred embodiment, the two angles located at the root of the central tooth in its cross-section are equal.

[0018] As a preferred embodiment, the proximal lateral teeth are linearly inclined from the proximal end to the distal end, and the angle of the proximal angle on the tooth root in the cross-section of the lateral teeth at the nearest end ranges from 25° to 65°, preferably from 35° to 55°, and more preferably from 45°.

[0019] The distal lateral teeth are linearly inclined from the distal end to the proximal end, and the angle of the distal angle on the root of the cross-section of the distal lateral teeth is in the range of 30° to 70°, preferably 40° to 60°, and more preferably 50°.

[0020] As a preferred embodiment, the height of the upper meshing teeth gradually increases from the proximal end to the distal end.

[0021] As a preferred embodiment, the thickness of the upper clamping arm is such that the height of the upper meshing tooth at the proximal end is 1:0.5 to 1.5, preferably 1:1;

[0022] The thickness of the upper clamping arm: the height of the upper meshing tooth at the distal end is 1:2 to 4, preferably 1:3.

[0023] As a preferred embodiment, the cross-section of the upper meshing tooth can be a trapezoidal structure with a wide root and a narrow tip.

[0024] As a preferred embodiment, the upper meshing tooth can also be a triangular prism structure, with a quadrilateral base of the upper meshing tooth disposed on the upper clamping arm, and two sides of the upper meshing tooth having a triangular structure. In the triangular structure, the included angle at the connection point with the upper clamping arm is the first included angle at the proximal end and the included angle at the distal end is the second included angle. The other included angle of the triangular structure, away from the upper clamping arm, faces the lower clamping arm.

[0025] As a preferred embodiment, the root of the upper meshing tooth is smoothly connected to the upper clamping arm, forming a transition arc at the connection point;

[0026] The top surface of the upper meshing tooth is an arc surface to reduce stress on the valve and avoid puncturing the valve.

[0027] As a preferred embodiment, the clamping surface width of the upper clamping arm is not greater than the corresponding clamping surface width of the lower clamping arm, and the length of the upper clamping arm is not greater than the length of the lower clamping arm.

[0028] As a preferred embodiment, the clamping surfaces of the upper clamping arms have a uniform width.

[0029] As a preferred embodiment, the clamping surface widths of the upper clamping arms are inconsistent, and the distal end of the upper clamping arms has an outward expansion structure.

[0030] As a preferred embodiment, the distal end of the lower clamping arm has another outward expansion structure.

[0031] As a preferred embodiment, the distal end of the outward expansion structure has a cylindrical end, the axial direction of which is perpendicular to the length direction of the outward expansion structure.

[0032] As a preferred embodiment, the angle between the length direction of the outward expansion structure and the length direction of the upper clamping arm or the lower clamping arm is 10°-30°.

[0033] As a preferred embodiment, the upper clamping arms are interconnected from the proximal end to the distal end:

[0034] The upper bend can be retracted into the sleeve, and the clamping surface has a uniform width;

[0035] The upper clamping part has two flat sides, and the upper meshing teeth are provided on the side facing the lower clamping arm. The width of the clamping surface increases and then decreases from the proximal end to the distal end.

[0036] The lower clamping arm has a corresponding structure identical to that of the upper clamping arm.

[0037] As a preferred embodiment, the width of the clamping surface of the upper bending portion is: 1:1.5 to 3.5 at the widest point of the clamping surface in the upper clamping portion, preferably 1:2.5.

[0038] As a preferred embodiment, the distal ends of both the upper clamping arm and the lower clamping arm are covered with a clamping arm coating.

[0039] As a preferred embodiment, the proximal end of the upper clamp has:

[0040] A connector is integrally connected at the distal end to at least one pair of the upper clamping arms.

[0041] As a preferred embodiment, the connector has an integrally connected connecting post and a U-shaped member from the proximal end to the distal end, and the distal end of the U-shaped member is smoothly connected to the upper clamping arm.

[0042] As a preferred embodiment, both the upper clamp and the connector are integrally made of a self-expanding material;

[0043] A threaded hole is drilled from the middle of the near end face of the connecting column toward the far end.

[0044] As a preferred embodiment, the proximal width of the U-shaped component is greater than the distal width, and the proximal width of the U-shaped component is greater than the maximum diameter of the connecting post.

[0045] As a preferred embodiment, the width of the U-shaped member gradually decreases from the proximal end to the distal end until it is the same as the width between the proximal outer walls of the pair of upper clamping arms.

[0046] As a preferred embodiment, the sleeve comprises an integrally connected portion from the proximal end to the distal end:

[0047] A hollow cylindrical component, with an open structure at both ends;

[0048] A connecting part is connected to the distal end of the hollow cylindrical component, and its outer diameter is larger than the outer diameter of the distal end of the hollow cylindrical component, thereby forming a boss structure at the distal end of the hollow cylindrical component.

[0049] As a preferred embodiment, the near end of the hollow cylindrical component is provided with at least one circumferential limiting component that cooperates with an external conveyor;

[0050] The hollow cylindrical component is also provided with an axial limiting plate that cooperates with an external conveyor on its outer circumferential surface.

[0051] A sleeve-shaped film is provided on the outer circumferential surface of the hollow cylindrical component. The sleeve-shaped film is divided into a proximal film and a distal film by the axial limiting plate.

[0052] As a preferred embodiment, the sleeve coating has a coating hole, the sleeve coating is a coating made of a biocompatible material, and the elastic modulus of the sleeve coating is 1000MPa-1500MPa.

[0053] As a preferred embodiment, the hollow cylindrical component has the following openings:

[0054] Four sleeve through holes are provided, with two sleeve through holes symmetrically arranged as a group, and the two groups of sleeve through holes are evenly and alternately distributed along the outer periphery of the hollow cylindrical part.

[0055] As a preferred embodiment, the diameter of the hollow cylindrical component is 1:0.25 to 0.75 of the diameter of the sleeve through hole, preferably 1:0.5.

[0056] As a preferred embodiment, a set of the sleeve through holes is located on the far side of the axial limiting plate, and the proximal edge of the sleeve through holes is tangent to the far end of the axial limiting plate.

[0057] Another set of sleeve through holes is located on the proximal side of the connecting part, and the distance between the distal edge of the sleeve through hole and the distal end of the connecting part is the diameter of the sleeve through hole.

[0058] As a preferred embodiment, the hollow cylindrical component has the following openings:

[0059] Two auxiliary through holes are symmetrically arranged on the proximal side of the axial limiting plate.

[0060] As a preferred embodiment, the axial limiting plate includes:

[0061] A limiting ring is located on the outer circumferential surface of the hollow cylindrical component;

[0062] Two symmetrical cut surfaces are arranged on the limiting ring, and the limiting ring is cut into a hollow, rounded rectangular structure.

[0063] As a preferred embodiment, the width of the limiting ring minus the width of the cut surface is greater than the width of the limiting baffle on the external conveyor that cooperates with the axial limiting plate.

[0064] The positive and progressive effects of this invention are as follows: This invention uses a valve repair clamp, which has the following advantages:

[0065] 1. When the upper clamping body is pushed to the distal end, the side teeth at the proximal end of the upper meshing teeth are inclined to the distal end, which can better push the lower meshing teeth, thereby smoothly pushing the lower clamping body out of the sleeve to the distal end; when the upper clamping body is pushed back to the proximal end, the side teeth at the distal end of the upper meshing teeth can not only drive the lower meshing teeth at the distal end of the lower clamping body to push back and smoothly return the lower clamping body to the sleeve, but also, because they are inclined to the proximal end, they can more reliably clamp the leaflets.

[0066] 2. When the clamping surface width of the upper clamping arm is uniform, there is no outward expansion structure to avoid damaging the clamped leaflets; when the clamping surface width of the upper clamping arm is inconsistent, there is an outward expansion structure, which works together with another outward expansion structure on the lower clamping arm to reliably clamp the leaflets without damaging them, and the leaflets are not easy to detach.

[0067] 3. By improving the connectors, the misalignment of the upper and lower clamps is greatly avoided, ensuring the opening of the lower clamp. The integrated upper clamp and connectors also greatly reduce the complexity of the process.

[0068] 4. The improved design of the sleeve allows for reliable cooperation with external conveyors, while also enabling easy detachment from them.

[0069] 5. The distribution of through holes in the sleeve can not only effectively fix the sleeve coating, but also greatly reduce the overall weight of the sleeve without affecting the radial stress of the sleeve. Attached Figure Description

[0070] Figure 1 This is a perspective view of the invention when it is opened;

[0071] Figure 2 for Figure 1 A schematic diagram of a structure with a membrane covering the middle layer;

[0072] Figure 3 This is a front view when the invention is opened;

[0073] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0074] Figure 5 This is a side view of the invention when it is opened;

[0075] Figure 6 This is a top view of the invention when it is opened;

[0076] Figure 7 This is a bottom view of the invention when it is opened;

[0077] Figure 8 This is an exploded view of the invention when it is opened;

[0078] Figure 9 This is a perspective view of the clamping action of the present invention;

[0079] Figure 10 for Figure 9 A schematic diagram of a structure with a membrane covering the middle layer;

[0080] Figure 11 This is a front view of the present invention when it is clamped.

[0081] Figure 12 This is a side view of the present invention when it is clamped.

[0082] Figure 13 This is a top view of the present invention when it is clamped.

[0083] Figure 14 This is a bottom view of the device when it is clamped together according to the present invention;

[0084] Figure 15 This is an exploded view of the clamping mechanism of the present invention;

[0085] Figure 16 This is another perspective view of the invention when it is opened;

[0086] Figure 17 for Figure 16 A schematic diagram of a structure with a membrane covering the middle layer;

[0087] Figure 18 This is another front view when the invention is opened;

[0088] Figure 19 This is another side view of the invention when it is opened;

[0089] Figure 20 This is another top view of the invention when it is opened;

[0090] Figure 21 This is another bottom view of the invention when it is opened;

[0091] Figure 22 This is another exploded view of the invention when it is opened;

[0092] Figure 23 This is another perspective view of the clamping mechanism of the present invention;

[0093] Figure 24 for Figure 23 Another structural diagram when the middle layer is covered with a film;

[0094] Figure 25 This is another front view of the present invention when it is clamped;

[0095] Figure 26 This is another side view of the present invention when it is clamped;

[0096] Figure 27 This is another top view of the present invention when clamped;

[0097] Figure 28 This is another bottom view of the present invention when clamped;

[0098] Figure 29 This is another exploded view of the clamping mechanism of the present invention;

[0099] Figure 30 This diagram shows the connection relationship between the sleeve and the external conveyor of the present invention. Detailed Implementation

[0100] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0101] Reference Figures 1 to 29 A valve repair clamp includes an upper clamp 100, a lower clamp 200, and a sleeve 300. The upper clamp 100 has at least one pair of upper clamping arms 110 with geometric angles, and the lower clamp 200 has a lower clamping arm 210 that mates with the upper clamping arms 110. The sleeve 300 is used to retract the upper clamp 100 and the lower clamp 200, and at least the distal ends of the upper clamp 100 and the lower clamp 200 extend from the distal end of the sleeve 300.

[0102] In some embodiments, the included angle between a pair of upper clamping arms 110 is greater than the included angle between a corresponding pair of lower clamping arms 210. The included angle between a pair of upper clamping arms 110 is 100°-130°.

[0103] Reference Figures 1 to 4 , Figure 8 , Figures 9 to 11 , Figure 15 , Figures 16 to 18 , Figure 22 , Figures 23 to 25 and Figure 29 The upper clamping arm 110 is provided with a plurality of upper meshing teeth 120, which are located on the side of the upper clamping arm 110 facing the lower clamping arm 210. The lower clamping arm 210 is provided with a plurality of lower meshing teeth 220, which are located on the side of the lower clamping arm 210 facing the upper clamping arm 110. The lower meshing teeth 220 and the upper meshing teeth 120 engage to capture the leaflet.

[0104] In some embodiments, the number of lower engaging teeth 220 on the lower clamping arm 210 is greater than the number of upper engaging teeth 120 on the upper clamping arm 110.

[0105] In some embodiments, refer to Figure 4 Among the several upper meshing teeth 120, the middle upper meshing tooth 120 is the center tooth 121, and the distal and proximal upper meshing teeth 120 are the side teeth 122. The side teeth 122 are inclined and converge toward the center tooth 121.

[0106] In some embodiments, when the number of upper meshing teeth 120 is odd, the center tooth 121 is the middle upper meshing tooth 120; when the number of upper meshing teeth 120 is even, the center tooth 121 is the middle two upper meshing teeth 120. For example... Figure 4 As shown, seven upper meshing teeth 120 are provided on the upper clamping arm 110, with the middle upper meshing tooth 120 serving as the center tooth 121, and the six upper meshing teeth 120 on both sides of the center tooth 121 serving as side teeth 122.

[0107] In some embodiments, the angles α of the two angles α located at the root of the central tooth 121 in the cross-section are equal.

[0108] In some embodiments, the proximal lateral teeth 122 are linearly inclined from the proximal end to the distal end, and the angle b of the proximal angle located on the root in the cross section of the lateral teeth 122 at the nearest end ranges from 25° to 65°, preferably from 35° to 55°, and more preferably from 45°.

[0109] In some embodiments, the distal side teeth 122 are linearly inclined from the distal end to the proximal end, and the angle c of the distal end located on the tooth root in the cross section of the distal side teeth 122 is in the range of 30° to 70°, preferably in the range of 40° to 60°, and more preferably in the range of 50°.

[0110] In some embodiments, the height of the upper meshing teeth 120 gradually increases from the proximal end to the distal end.

[0111] In some embodiments, the thickness of the upper clamping arm 110 is h1, and the height of the upper meshing tooth 120 at the proximal end is h2, then h1:h2 = 1:0.5 to 1.5, preferably h1:h2 = 1:1.

[0112] In some embodiments, the height of the distal upper meshing tooth 120 is h3, then h1:h3 = 1:2 to 4, preferably h1:h2 = 1:3.

[0113] In some embodiments, the cross-section of the upper meshing tooth 120 can be a trapezoidal structure with a wide root and a narrow tip.

[0114] In some embodiments, the upper meshing tooth 120 may also be a triangular prism structure, with a quadrilateral base of the upper meshing tooth 120 disposed on the upper clamping arm 110, and two sides of the upper meshing tooth 120 being triangular structures. In the triangular structure, at the connection point with the upper clamping arm 110, i.e. at the tooth root, the included angle at the proximal end is the first included angle, and the included angle at the distal end is the second included angle. The other included angle in the triangular structure that is away from the upper clamping arm 110 faces the lower clamping arm 210.

[0115] In some embodiments, the first included angle and the second included angle of the central tooth 121 are the same. The first included angle of the proximal side tooth 122 ranges from 25° to 65°, preferably from 35° to 55°, and more preferably from 45°. The second included angle of the distal side tooth 122 ranges from 30° to 70°, preferably from 40° to 60°, and more preferably from 50°.

[0116] In some embodiments, the upper meshing tooth 120 may be improved as follows: the tooth root of the upper meshing tooth 120 is smoothly connected to the upper clamping arm 110, forming a transition arc at the connection; the top surface of the tooth tip of the upper meshing tooth 120 is an arc surface to reduce the stress on the valve and avoid puncturing the valve.

[0117] In some embodiments, the cross-section of the lower meshing tooth 220 can be a trapezoidal structure with a wide root and a narrow tip.

[0118] In some embodiments, the lower meshing tooth 220 may also be a triangular prism structure, with a quadrilateral base of the lower meshing tooth 220 disposed on the lower clamping arm 210, and two sides of the lower meshing tooth 220 being triangular structures. The two included angles at the connection point with the lower clamping arm 210, i.e. at the tooth root, are equal, i.e., the triangular structure is an isosceles triangle, and the other included angle of the triangular structure that is away from the lower clamping arm 210 faces the upper clamping arm 110.

[0119] In some embodiments, the lower meshing tooth 220 may be improved as follows: the tooth root of the lower meshing tooth 220 is smoothly connected to the lower clamping arm 210, forming a transition arc at the connection; the top surface of the tooth tip of the lower meshing tooth 220 is an arc surface to reduce the stress on the valve and avoid puncturing the valve.

[0120] In some embodiments, refer to Figure 1 , Figure 6 , Figure 16 and Figure 20 The width of the clamping surface of the upper clamping arm 110 is not greater than the width of the corresponding clamping surface of the lower clamping arm 210, and the length of the upper clamping arm 110 is not greater than the length of the lower clamping arm 210. This is so that after the lower clamping arm 210 lifts the leaflet, the width difference between the upper and lower clamping bodies provides the leaflet with a degree of freedom of movement.

[0121] In some embodiments, refer to Figures 1 to 15 The clamping surfaces of the upper clamping arms 110 have a uniform width.

[0122] In some embodiments, refer to Figures 16 to 29 The clamping surface widths of the upper clamping arm 110 are inconsistent, and at this time, there is an outward expansion structure 130 at the far end of the upper clamping arm 110.

[0123] In some embodiments, refer to Figure 18 and Figure 22 When the clamping surface widths of the upper clamping arm 110 are inconsistent, the upper clamping arm 110 has an upper bent portion 111 and an upper clamping portion 112 connected from the proximal end to the distal end. The upper bent portion 111 can be retracted into the sleeve 300, and the clamping surface width of the upper bent portion 111 is consistent. Both sides of the upper clamping portion 112 are flat, and an upper meshing tooth 120 is provided on the side of the upper clamping portion 112 facing the lower clamping arm 210. The clamping surface width of the upper clamping portion 112 first increases and then decreases from the proximal end to the distal end.

[0124] In some embodiments, the clamping surface width of the upper bending portion 111 is 1:1.5 to 3.5 at the widest point of the clamping surface in the upper clamping portion 112, preferably 1:2.5.

[0125] In some embodiments, regardless of whether the clamping surface widths of the upper clamping arm 110 are consistent or inconsistent, the clamping surface widths of the lower clamping arm 210 are inconsistent. The clamping surface width of the lower clamping arm 210 has an inconsistent structure similar to that of the upper clamping arm 110, that is:

[0126] The lower clamping arm 210 has a lower bend 211 and a lower clamping portion 212 connected from the proximal end to the distal end. The lower bend 211 can be retracted into the sleeve 300, and the clamping surface of the lower bend 211 has a uniform width. Both sides of the lower clamping portion 212 are flat. A lower meshing tooth 220 is provided on the side of the lower clamping portion 212 facing the upper clamping arm 110. The clamping surface width of the lower clamping portion 212 first increases and then decreases from the proximal end to the distal end.

[0127] In some embodiments, regardless of whether the clamping surface widths of the upper clamping arm 110 are consistent or inconsistent, another outward expansion structure 230 is provided at the distal end of the lower clamping arm 210.

[0128] When the clamping surface widths of the upper clamping arm 110 are inconsistent, the clamping area with the leaflet is larger. This is achieved by adding an expansion structure 130, which works in conjunction with the expansion structure 230 on the lower clamping arm 210. When the clamping surface widths of the upper clamping arms 110 are consistent, the expansion structure 130 can be omitted, but the expansion structure 230 is still located on the lower clamping arm 210. This design allows for a larger distance between the upper and lower clamping arms when capturing the leaflet, facilitating leaflet capture. Furthermore, after capturing and constricting the leaflet, a certain gap exists between the upper and lower clamping bodies at the distal end of the valve repair clamp, preventing excessive clamping. This provides a buffer to the leaflet during leaflet vibration caused by heartbeats, thus protecting the leaflet.

[0129] In some embodiments, the expansion structure 130 and the expansion structure 230 adopt the same structure: Refer to Figure 18 The distal end of the expansion structure 130 (230) has a cylindrical end 131 (231), the axis of which is perpendicular to the length direction of the expansion structure 130 (230).

[0130] In some embodiments, the angle between the length direction of the outward expansion structure 130 (230) and the length direction of the upper clamping arm 110 or the lower clamping arm 210 is 10°-30°.

[0131] In some embodiments, refer to Figure 2 , Figure 10 , Figure 17 and Figure 24The distal ends of the upper clamping arm 110 are covered with clamping arm coverings 140, and the distal ends of the lower clamping arm 210 are covered with clamping arm coverings 240. The clamping arm coverings 140 (240) are fixed to the distal ends of the upper clamping arm 110 (lower clamping arm 210) by means of suturing or adhesive bonding. The design of the clamping arm coverings 140 (240) promotes endothelialization on the one hand, and reduces the stress on the valve at the ends of the upper clamping arm 110 (lower clamping arm 210) on the valve on the other hand, thereby reducing damage to the valve leaflets.

[0132] In some embodiments, refer to Figure 8 , Figure 15 , Figure 22 and Figure 29 The proximal end of the upper clamping body 100 has a connector 150, and the distal end of the connector 150 is integrally connected to at least one pair of upper clamping arms 110.

[0133] In some embodiments, the connector 150 has an integrally connected connecting post 152 and a U-shaped member 151 from the proximal end to the distal end, with the distal end of the U-shaped member 151 smoothly connected to the clamping arm 110.

[0134] In some embodiments, the upper clamp 100 and the connector 150 are both integrally made of a self-expanding material; a threaded hole is provided in the middle of the proximal end face of the connecting post 152, which can be detachably connected to an external conveyor through the threaded hole.

[0135] In some embodiments, the proximal width of the U-shaped member 151 is greater than the distal width, and the proximal width of the U-shaped member 151 is greater than the maximum diameter of the connecting post 152.

[0136] In some embodiments, the connecting column 152 is a non-cylindrical column structure, preferably a column structure with a base that is a near-rounded rectangle.

[0137] In some embodiments, the width of the U-shaped member 151 gradually decreases from the proximal end to the distal end to be the same as the width between the proximal outer walls of the pair of upper clamping arms 110.

[0138] In some embodiments, refer to Figure 8 , Figure 15 , Figure 22 and Figure 29 The lower clamp 200 has a connecting ring 250 at its proximal end. The connecting ring 250 is racetrack-shaped, i.e., elliptical. The connecting post 152 is fitted inside the connecting ring 250 and moves along the axial direction of the connecting ring 250.

[0139] In some embodiments, the maximum inner diameter of the connecting ring 250 is smaller than the proximal width of the U-shaped member 151 to prevent the upper clamp 100 from passing through the proximal end of the connecting ring 250.

[0140] In some embodiments, refer to Figures 1 to 29 The sleeve 300 includes an integrally connected hollow cylindrical component 310 and a connecting portion 320 from its proximal end to its distal end. The hollow cylindrical component 310 is hollow inside, and both end faces of the hollow cylindrical component 310 are open structures. The connecting portion 320 is connected to the distal end of the hollow cylindrical component 310.

[0141] In some embodiments, the outer diameter of the connecting portion 320 is larger than the distal outer diameter of the hollow cylindrical member 310, resulting in a boss structure at the distal end of the hollow cylindrical member 310. The thickened boss structure can provide greater support strength, preventing sleeve deformation due to the outward reaction force of the lower clamping arm 210 on the connecting portion 320 when the upper clamping arm 110 is pulled down and the lower clamping arm 210 is brought into the sleeve 300, thus preventing a loose clamping. The inner wall of the connecting portion 320 is provided with a guide groove or internal thread that mates with the connecting ring 250 near the proximal end of the lower clamping body 200.

[0142] In some embodiments, the proximal end of the hollow cylindrical component 310 is provided with at least one circumferential limiting component 311 that cooperates with an external conveyor. The circumferential limiting component 311 is a U-shaped groove dug from the proximal end face of the hollow cylindrical component 310 to the distal end. The depth of the U-shaped groove is not less than 1 / 10 of the length of the sleeve 300.

[0143] In some embodiments, when the sleeve 300 is used in conjunction with the external conveyor 400, the external conveyor 400 is provided with a circumferential locking member, which is a groove-shaped member or a protrusion, such as... Figure 30 As shown, a protrusion 410 is provided on the external conveyor 400. The protrusion 410 engages with the U-shaped slot to prevent the sleeve 300 from rotating circumferentially.

[0144] In some embodiments, an axial limiting plate 312 that cooperates with an external conveyor is also provided on the outer peripheral surface of the hollow cylindrical component 310.

[0145] In some embodiments, refer to Figure 24 The axial limiting plate 312 includes a limiting ring 3121 and two cut surfaces 3122. The limiting ring 3121 is located on the outer circumferential surface of the hollow cylindrical part 310, preferably on the distal side of the circumferential limiting part 311. The two cut surfaces 3122 are symmetrically arranged on the limiting ring 3121, and the two cut surfaces 3122 cut the limiting ring 3121 into a hollow, rounded rectangular structure. The cut surfaces 3122 are designed to cooperate with the external conveyor to ensure that the sleeve 300 can pass through the limiting baffle located on the outer tube of the external conveyor after rotation.

[0146] In some embodiments, refer to Figure 30The width of the limiting ring 3121 minus the width at the cut surface 3122 is greater than the width of the limiting baffle 420 on the external conveyor 400 that mates with the axial limiting plate 312. That is, the chord height of the portion cut off from the limiting ring 3121 is greater than the width of the limiting baffle 420 on the external conveyor 400 that mates with the axial limiting plate 312.

[0147] In some embodiments, a sleeve covering is provided on the outer peripheral surface of the hollow cylindrical component 310. The sleeve covering is divided into a proximal covering and a distal covering by an axial limiting plate 312, while the axial limiting plate 312 is not covered.

[0148] In some embodiments, the sleeve coating has a coating hole, the sleeve coating is a coating made of a biocompatible material, and the elastic modulus of the sleeve coating is 1000MPa-1500MPa.

[0149] In some embodiments, the hollow cylindrical component 310 has four sleeve through holes 313 connecting the inside and outside of the hollow cylindrical component 310. Two sleeve through holes 313 are symmetrically arranged as a group, and the two groups of sleeve through holes 313 are evenly and alternately distributed along the outer periphery of the hollow cylindrical component 310. The distal end coating can be fixed to the distal side of the axial limiting plate 312 through the sleeve through holes 313.

[0150] In some embodiments, the sleeve through hole 313 is shaped as one or a combination of elliptical, circular, and polygonal shapes.

[0151] In some embodiments, the sleeve through hole 313 is preferably circular in shape.

[0152] In some embodiments, the diameter of the hollow cylindrical component 310 is 1:0.25 to 0.75 of the diameter of the sleeve through hole 313, preferably 1:0.5.

[0153] In some embodiments, one set of sleeve through holes 313 is located on the distal side of the axial limiting plate 312, and the proximal edge of the sleeve through holes 313 is tangent to the distal end of the axial limiting plate 312; another set of sleeve through holes 313 is located on the proximal side of the connecting portion 320, and the distance between the distal edge of the sleeve through holes 313 and the distal end of the connecting portion 320 is equal to the diameter of the sleeve through holes 313.

[0154] In some embodiments, the hollow cylindrical component has two auxiliary through holes 314, which are symmetrically arranged on the proximal side of the axial limiting plate 312. The proximal coating can be fixed to the proximal side of the axial limiting plate 312 through the auxiliary through holes 314.

[0155] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A valve repair clamp, comprising: An upper clamping body has at least one pair of upper clamping arms; The lower clamping body has a lower clamping arm that cooperates with the upper clamping arm; A sleeve that gathers the upper clamp and the lower clamp, with at least the distal ends of the upper clamp and the lower clamp extending from the distal end of the sleeve; The upper clamping arm is characterized by having: A plurality of upper meshing teeth are located on the side of the upper clamping arm facing the lower clamping arm. Among the plurality of upper meshing teeth, the middle upper meshing tooth is the center tooth. The two angles at the root of the center tooth in the cross-section are equal. The distal and proximal upper meshing teeth are side teeth. The side teeth are inclined and converge toward the center tooth. The proximal side teeth are linearly inclined from the proximal end to the distal end, and the distal side teeth are linearly inclined from the distal end to the proximal end. The lower clamping arm is also provided with: A plurality of lower meshing teeth are located on the side of the lower clamping arm facing the upper clamping arm, and the lower meshing teeth and the upper meshing teeth mesh to capture the leaflet; When the upper clamping body is pushed to the distal end, the side teeth at the proximal end of the upper meshing tooth are inclined to the distal end, which can push the lower meshing tooth and thus smoothly push the lower clamping body out of the sleeve to the distal end; when the upper clamping body is pushed back to the proximal end, the side teeth at the distal end of the upper meshing tooth can drive the lower meshing tooth at the distal end of the lower clamping body to push back and smoothly return the lower clamping body to the sleeve.

2. The valve repair clamp as described in claim 1, characterized in that, When the number of upper meshing teeth is odd, the center tooth is the middle upper meshing tooth.

3. The valve repair clamp as described in claim 1, characterized in that, When the number of upper meshing teeth is even, the center teeth are the two middle upper meshing teeth.

4. The valve repair clamp as described in claim 1, characterized in that, The height of the upper meshing teeth gradually increases from the proximal end to the distal end.

5. The valve repair clamp as described in claim 4, characterized in that, The thickness of the upper clamping arm: the height of the upper meshing tooth at the proximal end is 1: 0.5~1.5; The thickness of the upper clamping arm is such that the height of the upper meshing tooth at the distal end is 1:2~4.

6. The valve repair clamp as described in claim 5, characterized in that, The thickness of the upper clamping arm is 1:1 with the height of the upper meshing tooth at the proximal end. The thickness of the upper clamping arm is 1:3 with respect to the height of the upper meshing tooth at the distal end.

7. The valve repair clamp as described in claim 1, characterized in that, The clamping surface width of the upper clamping arm is not greater than the clamping surface width of the corresponding lower clamping arm, and the length of the upper clamping arm is not greater than the length of the lower clamping arm.

8. The valve repair clamp as described in claim 7, characterized in that, The clamping surfaces of the upper clamping arms have a uniform width.

9. The valve repair clamp as described in claim 7, characterized in that, The clamping surface widths of the upper clamping arms are inconsistent, and the distal end of the upper clamping arms has an outward expansion structure.

10. The valve repair clamp as described in claim 9, characterized in that, The distal end of the lower clamping arm has another outward expansion structure.

11. The valve repair clamp as described in claim 9, characterized in that, The distal end of the outward expansion structure has a cylindrical end, the axial direction of which is perpendicular to the length direction of the outward expansion structure.

12. The valve repair clamp as described in claim 11, characterized in that, The angle between the length direction of the outward expansion structure of the upper clamping arm and the length direction of the upper clamping arm is 10°-30°.

13. The valve repair clamp as described in claim 10, characterized in that, The angle between the length direction of the outward expansion structure of the lower clamping arm and the length direction of the lower clamping arm is 10°-30°.

14. The valve repair clamp as described in claim 9, characterized in that, The upper clamping arms are interconnected from the proximal end to the distal end: An upper bend portion, which can be retracted into the sleeve, has a uniform clamping surface width; The upper clamping part has two flat sides, and the width of the clamping surface of the upper clamping part increases and then decreases from the proximal end to the distal end.

15. The valve repair clamp as described in claim 14, characterized in that, The width of the clamping surface of the upper bend is 1:1.5~3.5 at the widest point of the clamping surface in the upper clamping part.

16. The valve repair clamp as described in claim 15, characterized in that, The width of the clamping surface of the upper bend is 1:2.5 at the widest point of the clamping surface in the upper clamping part.

17. The valve repair clamp as described in claim 1, characterized in that, The distal ends of both the upper clamping arm and the lower clamping arm are covered with a clamping arm coating.

18. The valve repair clamp as described in any one of claims 1 to 9, characterized in that, The proximal end of the upper clamp has a connector, and the distal end of the connector is integrally connected to at least one pair of the upper clamping arms.

19. The valve repair clamp as described in claim 18, characterized in that, The connector has an integrally connected connecting post and a U-shaped member from the proximal end to the distal end, and the distal end of the U-shaped member is smoothly connected to the upper clamping arm.

20. The valve repair clamp as described in claim 19, characterized in that, Both the upper clamp and the connector are integrally made of self-expanding material. A threaded hole is drilled from the middle of the near end face of the connecting column toward the far end.

21. The valve repair clamp as described in claim 19, characterized in that, The proximal width of the U-shaped component is greater than its distal width, and the proximal width of the U-shaped component is greater than the maximum diameter of the connecting post.

22. The valve repair clamp as described in claim 21, characterized in that, The width of the U-shaped member gradually decreases from the proximal end to the distal end until it is the same as the width between the proximal outer walls of the pair of upper clamping arms.

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