Annuloplasty leaflet recovery clip device

Abstract

This invention provides a circumferential mitral valve leaflet retrieval clamping device in the field of medical device technology. The device includes a handle and a catheter, with a cutting element and a hook at one end of the catheter, and a knob on the end face of the handle. Rotating one knob controls the hook to grasp the clamping device at the original mitral valve leaflet, while rotating another knob controls the cutting element to penetrate the original mitral valve leaflet. Rotating the handle causes the cutting element to circumferentially cut the original mitral valve leaflet. This invention allows for easy removal of the clamping device by pulling the handle outwards. The aforementioned clamping device removal method only involves circumferential cutting of the leaflet surrounding the clamping device, minimizing damage to the patient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a circumferential valve leaflet recovery clamping device. Background Technology

[0002] Mitral regurgitation is the most common heart valve disease worldwide, and there are various methods to treat it. Minimally invasive transcatheter surgery is one of the most common methods. Mitral valve clipping and mitral valve replacement are the preferred interventional procedures for treating mitral regurgitation. However, the mitral valve clip is prone to displacement or even dislodgement under the impact of blood flow. In such cases, removing the mitral valve clip and performing mitral valve replacement surgery is the best solution.

[0003] Currently, the only way to remove the mitral valve clip is through surgery, but this is quite harmful to the patient's body. Forcibly pulling out the clip through a catheter can easily cause damage to the valve leaflets, thereby increasing the risk of infection and worsening the patient's condition. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a circumferential leaflet recovery clamping device.

[0005] According to the present invention, a circumferential leaflet recovery clamping device includes a handle portion, the handle portion including a handle and a guide tube, and a cutting component and a hook component are provided at one end of the guide tube, and a knob is provided on the end face of the handle portion.

[0006] By rotating one knob, the hook component is controlled to grasp the clamp at the native mitral valve leaflet, and by rotating another knob, the cutting component is controlled to pierce the native mitral valve leaflet. By rotating the handle, the cutting component circumferentially cuts the native mitral valve leaflet.

[0007] In some embodiments, the knob includes a knob one and a knob two, the conduit includes a conduit one and a conduit two, and the hook is provided on one end of the conduit one, and the cutter is provided on one end of the conduit two;

[0008] Furthermore, the handle end face is provided with a knob hole one and a knob hole two, the bottom end of the knob one is inserted into the knob hole one, and the bottom end of the knob two is inserted into the knob hole two;

[0009] Furthermore, a plurality of spring blocks are provided inside one end of the conduit. Each spring block includes a spring and an end block, and the two sides of the spring are connected to the end block.

[0010] Furthermore, a plurality of spring blocks are provided inside one end of the conduit 2. Each spring block 2 includes a spring 2 and an end block 2, with the end block 2 connected to both sides of the spring 2.

[0011] In some embodiments, the hook component consists of multiple barbs and multiple connectors, and the tail end of the barb is connected to one end face of the connector;

[0012] The cutting component consists of multiple cutting blades and multiple connecting parts II, and the tail end of the cutting blade is connected to the end face of the connecting parts II;

[0013] Furthermore, multiple spring blocks are disposed opposite to each other on one side of multiple connectors, and multiple spring blocks are disposed opposite to each other on one side of multiple connectors.

[0014] In some embodiments, a pull wire is threaded through the conduit, the pull wire including pull wire one and pull wire two, and a plurality of threading holes one is provided on one end face of the conduit one, and a plurality of threading holes two is provided on one end face of the conduit two.

[0015] Furthermore, multiple pull wires are wound around one end of the bottom end of the knob, and the other end of the multiple pull wires is inserted into multiple wire holes, and the other end of the multiple pull wires passes through multiple spring blocks and is connected to the bottom end of multiple connectors.

[0016] Furthermore, one end of one of the multiple pull wires is wound around the bottom end of the knob two, and the other end of the multiple pull wires two passes through multiple wire holes two, and the other end of the multiple pull wires two passes through multiple spring blocks two and is connected to the bottom end of multiple connectors two.

[0017] In some embodiments, a plurality of limiting bosses 1 and a plurality of limiting bosses 2 are provided on the end face of the handle, and a plurality of pins 1 are provided on the knob 1, and a plurality of pins 2 are provided on the knob 2.

[0018] By rotating the knob, the pin on the knob is inserted into the hole of the limiting boss.

[0019] By rotating the second knob, the second pin on the second knob is inserted into the hole of the second limiting boss.

[0020] In some embodiments, the second catheter is fitted with a sheath section, which consists of a sheath sleeve and a sheath, and the sheath sleeve is provided with an injection hole.

[0021] In some embodiments, a plurality of the hooks are arranged circumferentially on one end face of the conduit, and a plurality of the cutting elements are arranged circumferentially on one end face of the second conduit.

[0022] In some embodiments, the barb is provided with a barb, and the barb is set at a 30° to 60° angle relative to the end face of the barb.

[0023] In some embodiments, multiple grooves are axially provided on the end face of the handle, and the first knob and the second knob, as well as the first limiting boss and the second limiting boss, are all provided on the end face of the handle between two grooves.

[0024] In some embodiments, the handle further includes a connecting boss, and the connecting boss is provided with a connecting hole, and the second conduit is disposed through the connecting hole, and the first conduit is disposed through the second conduit.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This utility model provides a handle, which includes a handle and a conduit. A knob one and a knob two are provided on the handle, and one end of the handle is connected to the conduit. The conduit includes a conduit one and a conduit two, and a pull wire one and a pull wire two are respectively provided inside the conduit one and the conduit two.

[0027] One end of the pull wire is wrapped around the bottom end of the knob, and the other end of the pull wire passes through the guide tube and multiple spring blocks and is connected to multiple hook parts. One end of the pull wire is wrapped around the bottom end of the knob, and the other end of the pull wire passes through the guide tube and multiple spring blocks and is connected to multiple cutting parts.

[0028] With the above settings, rotating knob one controls the claw to grasp the clamp at the original mitral valve leaflet, and rotating knob two controls the cutting component to pierce the original mitral valve leaflet. By rotating the handle, the cutting edge on the cutting component cuts around the original mitral valve leaflet, making it easy to pull the clamp on the claw to be taken out of the body by pulling the handle outward.

[0029] The above-mentioned method of removing the clamp only involves circumferential cutting of the leaflets around the clamp, which causes less harm to the patient's body. It avoids forcibly pulling out the clamp through a catheter, thus preventing excessive damage to the leaflets, reducing the risk of infection, and preventing the patient's condition from worsening. Attached Figure Description

[0030] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the overall structure of the annular leaflet recovery clamping device of this utility model from the axial perspective.

[0032] Figure 2 This is a schematic diagram of the overall structure of the annular leaflet recovery clamping device of this utility model from the front view.

[0033] Figure 3 This is a schematic diagram of the overall structure of the sheath section removed from the main view of the annular leaflet recovery clamping device of this utility model;

[0034] Figure 4 In order to be in Figure 3 Based on this utility model, a schematic diagram of the overall structure of the annular cutting petal recovery clamping device with the handle removed is shown in the main view.

[0035] Figure 5 In order to be in Figure 4 Based on this utility model, a schematic diagram of the overall structure of the detached catheter is shown in the main view direction of the annular leaflet recovery clamping device.

[0036] Figure 6 In order to be in Figure 5 Based on this invention, a partially enlarged schematic diagram of the annular leaflet recovery clamping device is shown in the main view. Figure 1 ;

[0037] Figure 7 In order to be in Figure 5 Based on this invention, a partially enlarged schematic diagram of the annular leaflet recovery clamping device is shown in the main view. Figure 2 ;

[0038] Figure 8 In order to be in Figure 3 Based on this invention, a partially enlarged schematic diagram of the annular leaflet recovery clamping device with knobs one and two removed is shown in the main view direction.

[0039] Figure 9 In order to be in Figure 8 A partially enlarged front view of the annular leaflet recovery clamping device of this utility model;

[0040] Figure 10 In order to be in Figure 5 A partially enlarged front view of the annular leaflet recovery clamping device of this utility model;

[0041] Figure 11 In order to be in Figure 10 A schematic diagram of the overall structure of the spring block two in the main view direction of the utility model of the annular cutting petal leaf recovery clamping device.

[0042] Figure 12 In order to be in Figure 10 A schematic diagram of the overall structure of the cutting blade of the circumferential cutting leaf recovery clamping device of Zhongben Utility Model, viewed from the main perspective.

[0043] Figure 13 In order to be in Figure 5 Based on this invention, a partially enlarged schematic diagram of the annular leaflet recovery clamping device with the cutting component, spring block two, and conduit two removed from the main view direction is shown.

[0044] Figure 14 In order to be in Figure 13A schematic diagram of the overall structure of the spring block in the main view of the utility model of the annular cutting leaflet recovery clamping device.

[0045] Figure 15 In order to be in Figure 13 A schematic diagram of the overall structure of the hook component of the circumferential cutting petal recovery clamping device of Zhongben Utility Model, viewed from the front.

[0046] Figure 16 In order to be in Figure 13 A partially enlarged schematic diagram of the hook component in the main view of the utility model of the annular cutting petal recovery clamping device;

[0047] Figure 17 This is a cross-sectional view of the overall structure of the circumferential leaflet recovery clamping device of this utility model;

[0048] Figure 18 for Figure 17 A partially enlarged cross-sectional view of the circumferential leaflet recovery clamping device of this utility model. Figure 1 ;

[0049] Figure 19 for Figure 17 A partially enlarged cross-sectional view of the circumferential leaflet recovery clamping device of this utility model. Figure 2 ;

[0050] Figure 20 This is a partially enlarged schematic diagram of the claw component in Embodiment 2 of the circumferential leaf recovery clamping device of this utility model.

[0051] Figure label:

[0052] Handle part 1, hook part 142

[0053] Handle 11, Barrel 1421

[0054] Knob 111, Barb 14211

[0055] Pin 1111 Connector 1422

[0056] Knob 2 112 Threading Hole 1 143

[0057] Pin 2 1121, Conduit 2 15

[0058] Limiting boss 113, spring block 2 151

[0059] Boss hole 1131, Spring 2 1511

[0060] Limiting boss 2 114 End block 2 1512

[0061] Boss Hole 2 1141 Cutting Part 152

[0062] Groove 115, Cutting edge 1521

[0063] Knob Hole 116 Connector 2 1522

[0064] Knob hole 2 117 Wire hole 2 153

[0065] Connecting 12 to 16 Wire

[0066] Pull wire 2 13 Connecting hole 161

[0067] Catheter 14 Sheath section 2

[0068] Spring block 141, sheath sleeve 21

[0069] Spring 1411 Injection Hole 211

[0070] End block 1412 Sheath 22 Detailed Implementation

[0071] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0072] Example 1

[0073] like Figure 1-19 As shown, the circumferential mitral leaflet recovery clamping device of this utility model includes a handle part 1, which includes a handle 11 and a guide tube. One end of the guide tube is provided with a cutting element 152 and a hook element 142, and a knob is provided on the end face of the handle 11. By rotating one knob, the hook element 142 is controlled to grasp the clamping device at the original mitral leaflet, and by rotating another knob, the cutting element 152 is controlled to penetrate into the original mitral leaflet. By rotating the handle 11, the cutting element 152 circumferentially cuts the original mitral leaflet.

[0074] The knobs include knob one 111 and knob two 112. The guide tubes include guide tube one 14 and guide tube two 15. A hook 142 is provided at one end of guide tube one 14, and a cutter 152 is provided at one end of guide tube two 15. Knob hole one 116 and knob hole two 117 are also provided on the end face of the handle 11. The bottom end of knob one 111 passes through knob hole one 116, and the bottom end of knob two 112 passes through knob hole two 117. Multiple spring blocks one 141 are provided inside one end of guide tube one 14. Spring block one 141 includes spring one 1411 and end block one 1412. End block one 1412 is connected to both sides of spring one 1411. Multiple spring blocks two 151 are provided inside one end of guide tube two 15. Spring block two 151 includes spring two 1511 and end block two 1512. End block two 1512 is connected to both sides of spring two 1511. The hook component 142 consists of multiple barbs 1421 and multiple connector 1422, with the tail ends of the barbs 1421 connected to the end faces of connector 1422. The cutting component 152 consists of multiple cutting blades 1521 and multiple connector 2 1522, with the tail ends of the cutting blades 1521 connected to the end faces of connector 2 1522. Multiple spring blocks 141 are arranged opposite to each other on one side of connector 1422, and multiple spring blocks 2 151 are arranged opposite to each other on one side of connector 2 1522. A pull wire is threaded through the conduit, including pull wire 12 and pull wire 2 13, with multiple threading holes 143 on one end face of conduit 14 and multiple threading holes 2 153 on one end face of conduit 2 15. Multiple pull wires 12 are wound around one end of the bottom end of knob 111, and the other end of the pull wires 12 passes through multiple wire holes 143. The other end of the pull wires 12 also passes through multiple spring blocks 141 and connects to the bottom end of multiple connectors 1422. Multiple pull wires 13 are wound around one end of the bottom end of knob 112, and the other end of the pull wires 13 passes through multiple wire holes 153. The other end of the pull wires 13 also passes through multiple spring blocks 151 and connects to the bottom end of multiple connectors 1522. Multiple limiting bosses 113 and 114 are provided on the end face of handle 11. Multiple pins 1111 are provided on knob 111, and multiple pins 1121 are provided on knob 112. By rotating knob 111, pin 1111 on knob 111 is inserted into boss hole 1131 of limiting boss 113. By rotating knob 212, pin 2121 on knob 212 is inserted into boss hole 1141 of limiting boss 214. A sheath section 2 is fitted onto catheter 215, which consists of sheath sleeve 21 and sheath 22, with an injection hole 211 on sheath sleeve 21. Multiple hooks 142 are arranged circumferentially on one end face of catheter 14, and multiple cutting parts 152 are arranged circumferentially on one end face of catheter 215.The handle 11 also includes a connecting boss 16, on which a connecting hole 161 is provided, and a second guide tube 15 is provided through the connecting hole 161, and a first guide tube 14 is provided through the second guide tube 15. A barb 1421 is provided on the barb 14211, and the barb 14211 is positioned at an angle of 30° to 60° relative to the end face of the barb 1421. Multiple grooves 115 are axially provided on the end face of the handle 11, and knobs 111 and 112, as well as limiting bosses 113 and 114, are all located on the end face of the handle 11 between two grooves 115.

[0075] Specifically, in this embodiment, observation is performed in conjunction with transesophageal echocardiography and digital subtraction angiography (DSA) system. By rotating the knob 111 clockwise, under the tension of the pull wire 12 and the elastic force of the spring block 141, the hook 142 opens and hooks the clamp.

[0076] Then, by rotating the knob 112 clockwise, under the pulling force of the pull wire 12 and the elastic force of the spring block 1511, the cutting piece 152 opens and pierces the original mitral valve annulus.

[0077] Then, by holding the handle 11 and rotating it, the cutting edge 1521 on the cutting piece 152 rotates and cuts the original mitral valve leaflet, causing the clamp to detach from the original mitral valve leaflet. Finally, by holding the end of the handle 11 and pulling the catheter outward, the clamp is brought out of the body.

[0078] Specifically, in this embodiment, observation is performed in conjunction with transesophageal echocardiography and DSA digital subtraction angiography system. After the knob 111 is rotated clockwise to the appropriate position, the pin 1111 on the knob 111 is inserted into the boss hole 1131 of the corresponding limiting boss 113, thereby limiting the hook 142 from the contracted state to the open state, and the barb 1421 on the hook 142 captures and clamps the original mitral valve leaflet clamp.

[0079] After the knob 112 is rotated clockwise to the appropriate position, the pin 1121 on the knob 112 is inserted into the boss hole 1141 of the corresponding limiting boss 114, thereby limiting the cutting part 152 from the contracted state to the open state, and the cutting blade 1521 on the cutting part 152 pierces into the original mitral valve leaflet, and by holding the handle 11 and slowly rotating it, the cutting blade 1521 circumferentially cuts the original mitral valve leaflet.

[0080] Finally, by holding the handle 11 and slowly pulling it outward, the catheter is pulled out, and the clamp held by the hook 142 on the catheter is brought out of the body.

[0081] Specifically, in this embodiment, if the rotation angle of knob 111 is to be adjusted, knob 111 needs to be pulled upward first, so that pin 1111 disengages from boss hole 1131, making it convenient for subsequent rotation adjustment of knob 111.

[0082] To adjust the rotation angle of knob 212, you need to pull knob 212 upwards first, so that pin 21121 disengages from boss hole 2141, making it easier to rotate knob 212 for subsequent adjustment.

[0083] Specifically, in this embodiment, the present invention enters the native mitral valve leaflet in the heart via a transapical approach.

[0084] Specifically, in this embodiment, by injecting saline solution into the injection port 211, air is allowed to escape from the gap between the sheath 22 and the catheter 15, preventing air from entering the blood vessels and avoiding harm to the patient.

[0085] Specifically, in this embodiment, the diameter of the sheath sleeve 21 is greater than the diameter of the sheath 22, the diameter of the sheath 22 is greater than the diameter of the second catheter 15, and the diameter of the second catheter 15 is greater than the diameter of the first catheter 14.

[0086] Specifically, in this embodiment, sheath 22 is a 20F diameter catheter, catheter one 14 is a 16F diameter catheter, and catheter two 15 is a 10F diameter catheter. (1F is 0.33 mm)

[0087] Specifically, in this embodiment, the barb 1421 on the claw 142 adopts a "J" shaped barb.

[0088] Specifically, in this embodiment, the barb 14211 is set at a 45° angle relative to the end face of the barb 1421.

[0089] Specifically, in this embodiment, one end of multiple pull wires 12 is wrapped around the bottom end of the knob 111, and the other end of multiple pull wires 12 is connected to the bottom end of multiple connectors 1422 and knotted as a fixing point.

[0090] One end of multiple pull cords 213 is wrapped around the bottom end of knob 212, and the other end of multiple pull cords 213 is connected to the bottom end of multiple connectors 21522 and knotted as a fixing point.

[0091] Example 2

[0092] like Figure 20 As shown, specifically, in this embodiment, the difference from embodiment 1 is that the barb 1421 on the claw 142 adopts a "V" shaped barb, and no barbs are provided on the barb 1421.

[0093] Working principle:

[0094] This utility model provides a handle, which includes a handle and a conduit. A knob one and a knob two are provided on the handle, and one end of the handle is connected to the conduit. The conduit includes a conduit one and a conduit two, and a pull wire one and a pull wire two are respectively provided inside the conduit one and the conduit two.

[0095] One end of the pull wire is wrapped around the bottom end of the knob, and the other end of the pull wire passes through the guide tube and multiple spring blocks and is connected to multiple hook parts. One end of the pull wire is wrapped around the bottom end of the knob, and the other end of the pull wire passes through the guide tube and multiple spring blocks and is connected to multiple cutting parts.

[0096] With the above settings, rotating knob one controls the claw to grasp the clamp at the original mitral valve leaflet, and rotating knob two controls the cutting component to pierce the original mitral valve leaflet. Then, by rotating the handle, the cutting edge on the cutting component cuts around the original mitral valve leaflet, making it easy to pull the clamp on the claw to be taken out of the body by pulling the handle outward.

[0097] The above-mentioned method of removing the clamp only involves circumferential cutting of the leaflets around the clamp, which causes less harm to the patient's body. It avoids forcibly pulling out the clamp through a catheter, thus preventing excessive damage to the leaflets, reducing the risk of infection, and preventing the patient's condition from worsening.

[0098] Work steps:

[0099] S1. First, move the hook and cutting parts to the target position by using the handle and guide tube. By rotating the knob, the spring block is stretched by the pull wire inside the guide tube. Under the elastic force of the spring block, the hook changes from the contracted state to the open state. In the open state, the hook captures and holds the clamp at the original mitral valve.

[0100] S2. Then, by rotating knob two, the spring block two is stretched through the inner pull wire of conduit two. Under the elastic force of spring block two, the cutting piece changes from a contracted state to an open state. In the open state, the cutting piece pierces the original mitral valve leaflet, and by rotating the handle, the cutting piece circumferentially cuts the original mitral valve leaflet.

[0101] S3. Finally, by holding the handle and slowly pulling it outward, the catheter is pulled out, and the clamp held by the hook on the catheter is brought out of the body.

[0102] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0103] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for recovering and clamping circumferentially cut leaflets, characterized in that, It includes a handle (1), which includes a handle (11) and a guide tube. One end of the guide tube is provided with a cutting part (152) and a hook part (142), and a knob is provided on the end face of the handle (11). By rotating one knob, the hook (142) is controlled to grasp the clamp at the native mitral leaflet, and by rotating another knob, the cutter (152) is controlled to pierce the native mitral leaflet, and by rotating the handle (11), the cutter (152) circumferentially cuts the native mitral leaflet.

2. The annular leaflet recovery clamping device according to claim 1, characterized in that, The knob includes a knob one (111) and a knob two (112), the conduit includes a conduit one (14) and a conduit two (15), and the hook part (142) is provided on one end of the conduit one (14), and the cutting part (152) is provided on one end of the conduit two (15). Furthermore, the handle (11) end face is provided with a knob hole one (116) and a knob hole two (117). The bottom end of the knob one (111) is inserted into the knob hole one (116), and the bottom end of the knob two (112) is inserted into the knob hole two (117). Furthermore, a plurality of spring blocks (141) are provided in one end of the conduit (14), the spring block (141) includes a spring (1411) and an end block (1412), and the two sides of the spring (1411) are connected to the end block (1412); Furthermore, a plurality of spring blocks (151) are provided inside one end of the conduit two (15). The spring block two (151) includes a spring two (1511) and an end block two (1512). The two sides of the spring two (1511) are connected to the end block two (1512).

3. The annular leaflet recovery clamping device according to claim 2, characterized in that, The hook (142) is composed of multiple barbs (1421) and multiple connectors (1422), and the tail end of the barb (1421) is connected to the end face of the connector (1422); The cutting component (152) is composed of multiple cutting blades (1521) and multiple connecting parts (1522), and the tail end of the cutting blade (1521) is connected to the end face of the connecting part (1522); Furthermore, multiple spring blocks (141) are disposed opposite to each other on one side of multiple connectors (1422), and multiple spring blocks (151) are disposed opposite to each other on one side of multiple connectors (1522).

4. The annular leaflet recovery clamping device according to claim 3, characterized in that, The conduit is provided with a pull wire, which includes pull wire one (12) and pull wire two (13). A plurality of threading holes one (143) are provided on one end face of the conduit one (14), and a plurality of threading holes two (153) are provided on one end face of the conduit two (15). Furthermore, multiple pull wires (12) are wound around one end of the bottom end of the knob (111), and the other end of the multiple pull wires (12) is inserted into multiple wire holes (143), and the other end of the multiple pull wires (12) passes through multiple spring blocks (141) and is connected to the bottom end of multiple connectors (1422); Furthermore, one end of one of the multiple pull wires (13) is wound around the bottom end of the knob two (112), and the other end of the multiple pull wires (13) is inserted into the multiple wire holes (153), and the other end of the multiple pull wires (13) passes through the multiple spring blocks (151) and is connected to the bottom end of the multiple connectors (1522).

5. The annular leaflet recovery clamping device according to claim 4, characterized in that, The handle (11) end face is provided with a plurality of limiting bosses one (113) and a plurality of limiting bosses two (114), and the knob one (111) is provided with a plurality of pins one (1111), and the knob two (112) is provided with a plurality of pins two (1121). By rotating the knob (111), the pin (1111) on the knob (111) is inserted into the boss hole (1131) of the limiting boss (113); By rotating the second knob (112), the second pin (1121) on the second knob (112) is inserted into the second boss hole (1141) of the second limiting boss (114).

6. The annular leaflet recovery clamping device according to claim 2, characterized in that, The second catheter (15) is fitted with a sheath section (2), which consists of a sheath sleeve (21) and a sheath (22), and the sheath sleeve (21) is provided with an injection hole (211).

7. The annular leaflet recovery clamping device according to claim 2, characterized in that, Multiple hooks (142) are arranged circumferentially on one end face of the first conduit (14), and multiple cutters (152) are arranged circumferentially on one end face of the second conduit (15).

8. The annular leaflet recovery clamping device according to claim 2, characterized in that, The handle (11) further includes a connecting boss (16), and a connecting hole (161) is provided on the connecting boss (16), and the second conduit (15) is provided through the connecting hole (161), and the first conduit (14) is provided through the second conduit (15).

9. The annular leaflet recovery clamping device according to claim 3, characterized in that, The barb (1421) is provided with a barb (14211), and the barb (14211) is set at a 30° to 60° angle relative to the end face of the barb (1421).

10. The annular leaflet recovery clamping device according to claim 5, characterized in that, Multiple grooves (115) are axially arranged on the end face of the handle (11), and the first knob (111) and the second knob (112), as well as the first limiting boss (113) and the second limiting boss (114) are all arranged on the end face of the handle (11) between the two grooves (115).

Images