Valve clamping device and valve repairing system

Abstract

The utility model provides a valve clamping device and a valve repair system in the technical field of medical instruments. The valve clamping device comprises a main body, a driving assembly, a clamping assembly and an attachment piece. The far end of the main body comprises a base, the clamping assembly is connected with the base, and the clamping assembly comprises a clamping element and a capturing device; the capturing device comprises a bent part, and the attachment piece is tightly attached to the bent part. The driving assembly is arranged in the main body, drives the clamping element to form an included angle of 0-150 degrees relative to the main body when torque is applied, and locks the included angle of the clamping element relative to the main body in real time when torque application is stopped. By means of the structure, the valve clamping device has the improved anti-fatigue performance and the more stable state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and particularly to a valve clamping device and a valve repair system. BACKGROUND

[0002] The atrioventricular valve between the atrium and the ventricle ensures that when the ventricle is diastolic, the valve is open, and the blood flows smoothly from the atrium to the ventricle, and when the ventricle is systolic, the valve is closed, and the blood cannot flow back from the ventricle to the atrium. When the valve cannot open and close normally, it will affect the circulation of blood, and among them, mitral regurgitation or tricuspid regurgitation is a very common type of atrioventricular valve lesion. In this type of lesion, the center or one side of the coaptation margin of the valve cannot be coapted when the valve is closed. Margin-to-margin repair is a treatment for the above-mentioned lesions, that is, the valve leaflets are coapted on the ventricular side of the opening to reduce the opening area of the valve when it is closed and reduce the blood flow when the valve is closed.

[0003] The valve clamping device is a kind of heart medical device for realizing transcatheter margin-to-margin repair. The valve clamping device is implanted in the lesion valve position through minimally invasive interventional surgery, and is stable at the valve position after implantation. Blood flow, heart beating and valve opening and closing and other external forces continuously challenge the fatigue resistance of the valve clamping device, so it is still of clinical significance to continuously improve the device. SUMMARY

[0004] In order to improve the fatigue resistance of the valve clamping device in the existing valve repair system, the present application proposes the following technical solutions:

[0005] In a first aspect, the present application provides a valve clamping device, comprising a main body, a driving assembly, a clamping assembly and an attachment. The distal end of the main body comprises a base, and the clamping assembly is connected to the base. The clamping assembly comprises a clamping element and a capture device, the capture device comprises a bent portion, and the attachment is tightly attached to the bent portion of the capture device. The driving assembly is arranged in the main body and drives the clamping element to present an angle of 0-150° with respect to the main body when a torque is applied, and instantly locks the angle of the clamping element with respect to the main body when the torque is removed.

[0006] In one implementation of the first aspect, the bent portion of the capture device comprises a distal end face and a proximal end face; the attachment is tightly attached to the distal end face and / or the proximal end face of the bent portion, and the external size is smaller than the external size of the bent portion.

[0007] In one implementation of the first aspect, the attachment is an elastic metal wire or an elastic metal sheet.

[0008] In one implementation of the first aspect, the attachment further comprises a film-like element, and the film-like element covers at least part of the surface of the attachment and the bent portion.

[0009] In an implementation form of the first aspect, the capturing device comprises a first capturing device and a second capturing device, and the first capturing device and the second capturing device each comprise a mounting portion and are fixedly arranged on two sides of the base through the mounting portions; and the bending portion is connected to the mounting portion.

[0010] In an implementation form of the first aspect, the bending portion comprises at least one hollow structure, and the attachment member passes through the hollow structure.

[0011] In an implementation form of the first aspect, at least one end of the attachment member extends to the mounting portion and is fixed to the base through the mounting portion.

[0012] In an implementation form of the first aspect, the proximal end of the main body comprises an attachment sleeve, the distal end of the attachment sleeve is connected to the proximal end of the base and has an internal thread; the driving assembly comprises a first transmission rod, a second transmission rod and a connecting element, the first transmission rod has an external thread that is screw-fitted with the internal thread of the attachment sleeve; the connecting element is sleeved at the proximal end of the first transmission rod and at the distal end of the second transmission rod, axially limited by the proximal end of the second transmission rod and rotatable relative to the second transmission rod; the distal end of the first transmission rod is in contact with the proximal end of the second transmission rod; and the clamping element is pinned to the second transmission rod inside the base.

[0013] In an implementation form of the first aspect, the valve clamping device further comprises a driving pin and a fixing pin; the clamping element comprises a first clamping element and a second clamping element, and each of the first clamping element and the second clamping element comprises a connecting arm, and the connecting arm comprises a driving sliding groove; the driving pin connects the distal end of the connecting arm to the second transmission rod and the base respectively and is axially slidable relative to the base; and the fixing pin is partially located in the driving sliding groove and is slidable relative to the driving sliding groove.

[0014] In a second aspect, the application provides a valve repair system, comprising any one of the valve clamping devices of the first aspect and a delivery system for delivering and driving the valve clamping device; and a stand for supporting and stabilizing the delivery system.

[0015] The implementation of the embodiments of the application has at least the following technical effects:

[0016] (1) The attachment member closely adheres to the bending portion of the capturing device, so that the fatigue resistance of the capturing device is improved, and no other force is generated on the capturing device; after the valve clamping device is implanted, the capturing device is not prone to abnormal deformation and structural integrity loss with the opening and closing movement of the heart and the native valve leaflets, thereby improving the safety of the operation;

[0017] (2) The clamping element of the valve clamping device has a large opening angle, which is more conducive to avoiding the entanglement of the tendon during the movement of the instrument in the ventricle, thereby improving the safety of the operation and promoting the progress of the operation;

[0018] (3) the driving assembly, under the action of external torque, drives the clamping element of the valve clamping device to present an angle relative to the main body, and the clamping element is locked at the driven angle instantaneously after the external torque is removed, the operation is simple when approaching and clamping the valve leaflet, and the valve leaflet is locked instantaneously after the clamping is completed, which is convenient for the operator to operate and reduces the operation steps, thereby further shortening the operation time. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings used in the description of the embodiments of the present application are briefly introduced as follows:

[0020] Figure 1 is a structural schematic diagram of a valve repair system provided by the embodiments of the present application;

[0021] Figure 2 is a structural schematic diagram of a distal end enlarged valve clamping device of a valve repair system provided by the embodiments of the present application;

[0022] Figure 3 is a structural schematic diagram of a valve clamping device with a covering after clamping a relatively thick valve leaflet provided by the embodiments of the present application;

[0023] Figure 4 is a three-dimensional structural schematic diagram of a valve clamping device with an attachment connected to a clutch mechanism provided by the embodiments of the present application;

[0024] Figure 5 is a three-dimensional structural schematic diagram of a capturing device with an attachment provided by the embodiments of the present application;

[0025] Figure 6 is a three-dimensional structural schematic diagram of a capturing device provided by the embodiments of the present application;

[0026] Figure 7 is a structural schematic diagram of another side surface of a valve clamping device separated from a clutch mechanism provided by the embodiments of the present application;

[0027] Figure 8 is a cross-sectional view of a valve clamping device with an attachment penetrating into a delivery rod provided by the embodiments of the present application. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the specific embodiments of the present application will be described below with reference to the drawings. The drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings and other embodiments according to these drawings without creating any creative labor, and any adjustment and improvement made without departing from the concept of the present application is within the protection scope of the present application.

[0029] For simplicity and conciseness of the drawings, only parts related to the present application are shown in the drawings of the embodiments of the present application, which do not represent the actual structure of the product. In addition, for simplicity and ease of understanding, in some drawings, only parts with the same structure or function are schematically shown, and there can be more or less parts with the same structure or function.

[0030] In the present application, unless otherwise explicitly specified and limited, ordinal numbers such as "first", "second", etc. are only used to distinguish the description of the associated objects, and cannot be understood as indicating or implying the relative importance or order between the associated objects; in addition, it also does not represent the number of the associated objects. "And / or" is used to describe the relationship between the associated objects, which includes any relationship between the associated objects, for example, "a and / or b" includes "a alone", "b alone", or "a and b". The terms "mounting", "connecting" should be interpreted broadly, for example, "mounting" can be direct mounting or mounting through other components; "connecting" can be direct connection or connection through other components. The term "relative arrangement" includes parallel relative or relative at an angle, and the angle is not limited, which is determined according to the number of objects arranged relatively.

[0031] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back, etc.) are not absolute but relative when describing the structure and movement of each component, and are not used to limit the direction when the product is actually used.

[0032] In the embodiments of the present application, "proximal end" refers to the end of the associated object close to the operator; "distal end" refers to the end of the associated object away from the operator. "Proximal end" and "distal end" are the position or direction of the associated object (for example, a component of a medical instrument) relative to the operator from the perspective of the operator (for example, a doctor) of the device (for example, a medical instrument) in which the associated object is used, for example, "proximal end" refers to the end close to the doctor during normal operation of the medical instrument by the doctor, and "distal end" refers to the end away from the doctor during normal operation of the medical instrument by the doctor, i.e. the end first entering the patient's body.

[0033] The valve clamping device and the valve repair system provided by the embodiments of the present application can not only be used for repairing the mitral valve and the tricuspid valve, but also can be used for repairing other similar valve structures.

[0034] The valve repair system provided by the present application, as shown in Figure 1 mainly includes a valve clamping device 10 and a delivery system 20, and the valve clamping device 10 can be connected to the distal end of the delivery system 20.

[0035] The valve clamping device 10 will be described below in conjunction with the drawings, referring to Figure 2To better illustrate the structure of the valve clamping device 10, a covering membrane is not shown on it. Figure 2 As shown, the valve clamping device 10 includes a main body 11 and a drive assembly 13 (located within the main body 11). Figure 2 (Not shown in the diagram) and clamping assembly 12. The main body 11 includes a base 111 at the distal end and an attachment sleeve 112 at the proximal end. The base 111 secures the clamping assembly 12 and provides support for the movement of the clamping assembly 12 and the drive assembly 13. The clamping assembly 12 includes a clamping element 121 (also referred to as a clamping arm) and a gripping device 122 (also referred to as a gripping arm). A portion of the drive assembly 13 is disposed inside the attachment sleeve 112, and another portion is disposed inside the base 111. It transmits a portion of the driving force applied by the surgeon to the delivery system 20 to the clamping element 121, allowing the clamping element 121 to open and close relative to the main body 11. Another portion of the driving force applied by the surgeon to the delivery system 20 is transmitted to the gripping device 122, allowing the gripping device 122 to also open and close relative to the main body 11. The opening and closing movements of the clamping element 121 and the gripping device 122 can be independent of each other. The number of clamping components 12 is multiple, that is, two or more. For ease of explanation, two clamping components 12 are used as an example for description. The implementation of more clamping components is similar.

[0036] When the valve clamping device 10 is delivered to the target location (e.g., the affected area), the surgeon drives the clamping element 121 to gradually open, i.e., the angle between it and the main body 11 gradually increases. At the optimal capture position, the surgeon controls the grasping device 122 to move towards the clamping element 121 on the same side, capturing the leaflet between the grasping device 122 and the clamping element 121. Then, the surgeon drives the clamping element 121 to close towards the main body 11. Since the grasping device 122 is located between the clamping element 121 and the main body 11, the clamping element 121 can drive the grasping device 122 to close, so that the valve clamping device 10 returns to the closed state. Finally, the surgeon controls the valve clamping device 10 to detach from the distal end of the delivery system 20 and remain in the patient's body.

[0037] After the valve clamping device 10 completes the clamping of the valve leaflets, it is in a closed state. In this state, the clamping component 12 has a very small angle relative to the main body 11. The main body 11 can fill the space between the two clamping components 12 to improve clamping stability and reduce blood backflow.

[0038] Because of individual differences in leaflet thickness, such as Figure 3As shown, after the clamping device 10 with the cladding device clamps the thicker leaflets, the angle between the clamping assembly 12 and the main body 11 can be larger than the ideal state, so that the clamping assembly 12 will bear a larger external force when the heart beats, the native valve leaflets open and close, and the blood flow washes, among which the fatigue resistance of the capture device 122, especially the bending part 1222 of the capture device 122, is particularly challenged.

[0039] Therefore, the attachment 14 is arranged at the bending part 1222 of the capture device 122 to improve the fatigue resistance thereof.

[0040] In some embodiments of the present application, referring to Figure 2 , Figure 4 and Figure 5 , the capture device 122 includes a first capture device and a second capture device, and each of the first capture device and the second capture device includes a mounting part 1221, a bending part 1222, and a capture part 1223. The mounting part 1221 is used to fixedly mount the capture device 122 to the side surface of the base 111. The bending part 1222 is connected between the mounting part 1221 and the capture part 1223, so that the capture part 1223 has a first angle relative to the main body 11 (or the axial direction) in a natural state. The first angle is greater than or equal to 60 degrees and less than or equal to 90 degrees, or the angle between the capture devices 122 is within a range of 120 to 180 degrees (including the boundary values), so that the capture device 122 has a suitable shape for capturing the leaflets in the natural state, which is beneficial to the capture of the leaflets.

[0041] The bending part 1222 includes a distal end surface close to the clamping element 121 and a proximal end surface close to the main body 11, and the attachment 14 can be closely attached to the distal end surface and / or the proximal end surface of the bending part 1222. As Figure 5 shown, the bending part 1222 has a length profile extending along the length direction of the capture device 122, a width profile perpendicular to the length, and a thickness, and the attachment 14 also has the above three dimensions, and the size of the attachment 14 in the above three dimensions is smaller than that of the bending part 1222.

[0042] In the preferred embodiments, the attachment 14 can be an elastic metal wire or an elastic metal sheet made of an elastic metal, and the elastic metal can be a nickel-titanium alloy, a cobalt-chromium-molybdenum alloy, a medical stainless steel, etc. The attachment 14 can be fastened to the bending part 1222 by winding, bolt fastening, welding, using a reactive adhesive, etc., and the specific fastening method is not limited in the present application. It can be understood that after the attachment 14 is fastened to the bending part 1222 of the capture device 122, the attachment 14 and the bending part 1222 are closely attached without a gap observable by the naked eye, and the attachment 14 and the bending part 1222 move synchronously or are stationary without relative displacement, and the attachment 14 does not generate other forces on the bending part 1222 except for improving the fatigue resistance of the bending part 1222.

[0043] The attachment 14 can further include a film-like element (not shown in the drawings) covering at least part of the surface of the attachment 14 and the bending portion 1222. The film-like element is selected from medical films with good biocompatibility, such as cellulose acetate film, polyimide film, polytetrafluoroethylene film, or polyurethane film, and the specific type of the film-like element is not limited in the present application. In a preferred embodiment, the film-like element can cover the entire surface of the attachment 14, and further fix the attachment 14 to the bending portion 1222, and has better biocompatibility to facilitate the endothelialization of the device. The film-like element can be attached to the attachment 14 and the bending portion 1222 by coating, hot melting, sewing, or binding, and in some embodiments, the film-like element can be provided with a drug coating to further promote the endothelialization of the valve clamping device 10.

[0044] In one implementation, the bending portion 1222 includes at least one hollow structure 1222-1 to realize subtractive machining of the bending portion 1222 or to provide a fixing site for the attachment 14, so as to realize more reliable connection of the attachment 14. The hollow structure 1222-1 can have any regular or irregular shape, such as star shape, rectangular shape, triangular shape, etc., and the shape of the hollow structure 1222-1 is not limited in the present application.

[0045] In a preferred embodiment, the attachment 14 is a nickel-titanium alloy wire, which is wound into the hole-like hollow structure 1222-1 of the bending portion 1222 and closely fits the proximal end surface and the distal end surface of the bending portion 1222.

[0046] At least one end of the attachment 14 extends to the mounting portion 1221 of the catching device 122 and is fixed to the base 111 through the mounting portion 1221. When the attachment 14 is wound into the hole-like hollow structure 1222-1 of the bending portion 1222, the other end of the attachment 14 can be fastened to the surface of the bending portion 1222 by any of the above-mentioned attachment methods and closely fits the surface of the bending portion 1222. In another preferred embodiment, two hollow structures 1222-1 are distributed along the length direction of the bending portion 1222, the attachment 14 is wound around the bending portion 1222 for 2-6 times along the length direction of the bending portion 1222 by passing through the hollow structures 1222-1, both ends of the attachment 14 extend to the mounting portion 1221 of the catching device 122 and are fixed through the mounting portion 1221, and the two ends of the attachment 14 can respectively extend to the mounting portion 1221 along the proximal end surface and the distal end surface of the bending portion 1222 and be fixed respectively. In this way, the free ends of the attachment 14 are all fixed to the mounting portion 1221, further improving the safety of the valve clamping device 10.

[0047] In one implementation, as shown in FIG. 8, the attachment 14 is a nickel-titanium alloy wire, which is wound into the hole-like hollow structure 1222-1 of the bending portion 1222 and closely fits the proximal end surface and the distal end surface of the bending portion 1222. Figure 4、 Figure 5 And Figure 6 As shown in FIG. 11, the capture device 122 is provided with a connecting hole 1225 for connecting a control mechanism for controlling the capture device 122. The control mechanism controls the state of the capture device 122 through a control line 216, and the control line 216 penetrates the connecting hole 1225. When the capture device 122 does not capture the leaflet, the control line 216 is pulled tight, and the capture device 122 is close to the main body 11. When the capture device 122 captures the leaflet, the control line 216 is loosened, and the capture device 122 quickly approaches the clamping element 121 in the natural state without external force control, and is docked with the clamping element 121 to capture the leaflet.

[0048] Further, the capture portion 1223 is provided with a plurality of anchor pieces 1224, which facilitate the capture of the native leaflet by the capture portion 1223 due to the increased frictional force. The number and shape of the anchor pieces 1224 are not limited in the present application.

[0049] The bending portion 1222 or the whole of the capture device 122 is made of an elastic material, which can be an elastic alloy such as nickel-titanium alloy. The elastic material facilitates the repeated opening and closing movement of the capture device 122, and in the natural state, the capture device 122 has a first included angle with the main body 11, so that the capture device 122 can quickly open to the clamping element 121 to capture the leaflet. The capture device 122 can be integrally formed of an elastic material to reduce production cost; or the bending portion 1222 of the capture device 122 is made of an elastic material, and the other parts (such as the mounting portion 1221) or the whole are made of a rigid material to improve the connection rigidity.

[0050] Please refer to Figure 7 which is another perspective view of the base 111 provided with the clamping assembly 12 in the embodiment, as shown in Figure 7 The base 111 has a first side surface 1111 and a second side surface 1112, and oppositely arranged first and second support walls 1116 and 1117, and a containing space 1113 is formed between the first and second support walls 1116 and 1117. The first side surface 1111 has a first opening 1114 for the containing space 1113 to the outside, and the second side surface 1112 has a second opening 1115 for the containing space 1113 to the outside. Part of the drive assembly 13 is arranged in the containing space 1113, and the distal end portion of the clamping element 121 extends into the containing space 1113 through the openings on both sides of the base 111 and is pinned to the second transmission rod 132 inside the base 111.

[0051] In the embodiment of the present application, please refer to Figure 8The driving assembly 13 comprises a first transmission rod 131, a second transmission rod 132 and a connecting element 133, the connecting element 133 is arranged such that only axial movement is transmitted between the first transmission rod 131 and the second transmission rod 132, and no radial movement is transmitted.

[0052] The proximal end of the connecting element 133 is sleeved on the distal end of the first transmission rod 131, is fixedly connected with respect to the first transmission rod 131, the distal end is sleeved on the proximal end of the second transmission rod 132, and can rotate with respect to the second transmission rod 132, and the connecting element 133 further comprises an internal space 1331. The second transmission rod connecting end 1321 located at the proximal end of the second transmission rod 132 is a limiting element arranged in the internal space 1331 of the connecting element 133. At this time, the distal end of the first transmission rod 131 and the proximal end of the second transmission rod 132 can be in contact in the internal space 1331; the connecting element 133 and the limiting element 1321 constitute an axial limiting structure, and since there is no radial limiting, the radial friction is small, so as to be insufficient to transmit radial movement, that is, the axial limiting structure transmits axial movement while preventing the transmission of radial movement tendency to the second transmission rod 132. The distal end opening of the connecting element 133 just contains the second transmission rod 132 to limit the shaking of the second transmission rod 132, and improve the stability of the valve clamping device 10.

[0053] When the valve clamping device 10 is implanted, the delivery rod driving handle 2231 arranged at the proximal end of the delivery system 20 can provide driving force to the valve clamping device 10 through the delivery rod 214. The first transmission rod 131 has an axially distributed internal space, and the distal end portion of the delivery rod 214 is shaped and matched with the shape of the internal space of the first transmission rod 131, and both can have a non-circular cross section. When a torque is applied to the delivery rod 214, the outer wall of the distal end portion of the delivery rod 214 abuts against the wall of the internal space of the first transmission rod 131, and the torque is transmitted to the first transmission rod 131. The present application does not limit the shape of the distal end portion of the delivery rod 214 and the shape of the internal space of the first transmission rod 131, as long as the delivery rod 214 can abut against the internal space of the first transmission rod 131 as soon as possible when the delivery rod 214 moves radially.

[0054] Continuing to refer to Figure 8The inner side wall of the attachment sleeve 112 is provided with an inner thread 1122, and the outer side wall of the first transmission rod 131 is provided with an outer thread 1312, the helixes of which are adapted to each other. When the friction between the delivery rod 214 and the inner space of the first transmission rod 131 drives the first transmission rod 131 to rotate radially, the first transmission rod 131 can be axially moved to the distal end by thread rotation, and the axial thrust can be transmitted to the limiting element 1321 through the distal end of the first transmission rod 131, and then to the second transmission rod 132; when the friction between the delivery rod 214 and the first transmission rod 131 drives the first transmission rod 131 to rotate in the opposite direction, the first transmission rod 131 can be axially moved to the proximal end by thread rotation, and the axial tension can be transmitted to the limiting element 1321 through the connecting element 133, and then to the second transmission rod 132. In this way, the second transmission rod 132 moves axially, and then drives the movement of the clamping element 121, changing the included angle between the clamping element 121 and the main body 11.

[0055] The inner thread 1122 of the attachment sleeve 112 and the outer thread 1312 of the first transmission rod 131 are arranged such that when the first transmission rod 131 is subjected to torque and moves axially by thread rotation, each step of movement can be immediately locked by thread when the torque is stopped, so that a special control mechanism for the locking structure in the delivery system 20 is not needed, and the clamping element 121 can be locked at any time, and the operation steps are simple and effective. The length (or number) and position of the inner and outer threads on the attachment sleeve 112 and the first transmission rod 131 are not limited in the embodiments of the present application. The above structure is more conducive to the transmission of the moment on the control mechanism near the delivery rod 214, and the control performance of the valve clamping device 10 is better.

[0056] Specifically, the clamping element 121 comprises a first clamping element and a second clamping element, both of which comprise a connecting arm 1211 and a clamping portion 1212, the connecting arm 1211 comprising a driving slot 1211-1. A driving pin 114 and a fixing pin 113 are arranged through the accommodating space 1113, and corresponding axial movement sliding rails 1141 are arranged on the first support wall 1116 and the second support wall 1117 of the base 111. The end of the driving pin 114 is located in the movement sliding rail 1141 of the first support arm 1116 and the second support arm 1117 respectively, and the main body portion passes through the distal end of the connecting arm 1211 of the first clamping element, the distal end of the second transmission rod 132, and the distal end of the connecting arm 1211 of the second clamping element in turn. The fixing pin 113 passes through the driving slot 1211-1, and the ends are fixedly installed on the first support wall 1116 and the second support wall 1117 respectively. In this way, the connection and movement state of the clamping element 121 relative to the base 111 is more stable. Understandably, the end of the driving pin 114 can also adopt other adaptive modes such as contact, to realize sliding relative to the movement sliding rail 1141, and the adaptive mode of the end of the driving pin 114 and the movement sliding rail 1141 is not limited in the present application.

[0057] When the driving assembly 13 is applied with torque, the axial movement of the second transmission rod 132 drives the driving pin 114 to slide along the movement sliding rail 1141, so that the connecting arm 1211 rotates relative to the second transmission rod 132 with the driving pin 114 as the fulcrum, that is, performs opening and closing movement relative to the second transmission rod 132, thereby changing the relative position of the fixing pin 113 in the driving slot 1211-1, so that the connecting arm 1211 drives the clamping portion 1212 to perform opening and closing movement in the direction limited by the driving slot 1211-1.

[0058] In the preferred embodiment of the present application, when the valve clamping device 10 is in the closed state, the driving pin 114 is located at the distal end of the movement sliding rail 1141, the fixing pin 113 passes through the driving slot 1211-1 and is located at a distance from both ends of the driving slot 1211-1. When the second transmission rod 132 moves gradually towards the proximal end along the axial direction, the driving pin 114 is driven to move towards the proximal end along the movement sliding rail 1141, and the clamping element 121 is opened and gradually moves away from the main body 11. When the clamping element 121 is opened to an angle suitable for capturing the valve leaflets, the torque is stopped, and the angle is immediately locked under the action of the internal and external threads. When the second transmission rod 132 moves gradually towards the distal end along the axial direction, the driving pin 114 is driven to move towards the distal end along the movement sliding rail 1141, and the clamping assembly 12 gradually approaches the main body 11 and moves to the closed state.

[0059] In one implementation, the drive slide 1211-1 adopts a two-section design. The shape of the track is not limited in this application. Both sections can be arc-shaped or straight tracks, or the two track sections can be designed independently with different shapes. This structural design allows the valve clamping device 10 to have a larger opening angle. When torque is applied to the drive assembly 13, the drive clamping element 121 presents an angle of 0-150° relative to the main body 11.

[0060] This application also provides a valve repair system, such as Figure 1 As shown, the valve repair system includes a valve clamping device 10 and a delivery system 20, as well as a platform 30 for supporting and stabilizing the delivery system 20. The delivery system 20 is used to deliver (or transport) and drive the valve clamping device 10, and includes a catheter 210 and a delivery device 220. The proximal end of the attachment cannula 112 is provided with a connection structure 1121 for docking with the delivery system 20, thereby enabling the connection and disconnection of the valve clamping device 10 and the delivery system 20.

[0061] In one implementation, the delivery system 20 can adopt a three-layer structure, with the catheter 210 including an outer guiding tube 211, a middle control catheter 212, and an inner implantation catheter 213. The delivery device 220 includes a guiding tube handle 221, a control catheter handle 222, and an implantation catheter handle 223, respectively disposed at the proximal ends of the guiding tube 211, control catheter 212, and implantation catheter 213, for controlling the distal movement of these three catheters. A delivery rod 214 can be disposed within the implantation catheter 213, and a control mechanism (not shown) can be disposed on the implantation catheter handle 223. The delivery rod drive handle 2231 can apply torque and axial power to the proximal end of the delivery rod 214 through the control mechanism, thereby transmitting torque and axial power to the distal end of the delivery rod 214. The valve clamping device 10 and the implantation catheter 213 are connected and disconnected via a clutch mechanism 215. The clutch mechanism 215, located at the distal end of the catheter 213, is connected to the connection mechanism 1121 at the proximal end of the valve clamping device 10 under the action of the distal part of the delivery rod 214. At the implantation position, the valve clamping device 10 is controlled by the implantation catheter handle 223 and the delivery rod drive handle 2231 to capture and clamp the valve leaflets. Finally, the delivery rod drive handle 2231 is pulled proximally, causing the distal end of the delivery rod 214 to leave the valve clamping device 10 and the clutch mechanism 215. The clutch mechanism 215 separates from the valve clamping device 10 and is withdrawn from the body along with the catheter 210, leaving the valve clamping device 10 in the patient's body.

[0062] The above implementation of the conveying system 20 is merely an example; other structures may be used in other embodiments.

[0063] In the above embodiments, the description of each embodiment is focused on, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0064] It should be noted that the above embodiments can be freely combined as needed. The above are only some embodiments of the present application, and those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A valve clamping device, characterized in that, include: Main body, drive components, and clamping components; The distal end of the main body includes a base, and the clamping assembly is connected to the base; The clamping assembly includes clamping elements and a grasping device, the grasping device including a bending portion; It also includes an attachment that fits snugly against the bent portion; The drive assembly is arranged inside the main body, and when torque is applied, it drives the clamping element to form an angle of 0-150° relative to the main body, and immediately locks the angle of the clamping element relative to the main body when the torque is removed.

2. The valve clamping device according to claim 1, characterized in that, The bent portion includes a distal end face and a proximal end face; the attachment is tightly fitted to the distal end face and / or proximal end face of the bent portion, and its external dimensions are smaller than the external dimensions of the bent portion.

3. The valve clamping device according to claim 2, characterized in that, The attachment is a flexible metal wire or a flexible metal sheet.

4. The valve clamping device according to claim 2, characterized in that, The attachment further includes a membrane element that at least covers a portion of the surface of the attachment and the bend.

5. The valve clamping device according to any one of claims 1-4, characterized in that, The capture device includes a first capture device and a second capture device. Both the first capture device and the second capture device include a mounting part, which is fixed to both sides of the base respectively. The bending part is connected to the mounting part.

6. The valve clamping device according to claim 5, characterized in that, The bent portion includes at least one hollow structure, and the attachment is inserted into the hollow structure.

7. The valve clamping device according to claim 6, characterized in that, At least one end of the attachment extends to the mounting portion and is fixed to the base via the mounting portion.

8. The valve clamping device according to claim 1, characterized in that, The proximal end of the main body includes an attachment sleeve, the distal end of which is connected to the proximal end of the base and has internal threads; The drive assembly includes a first transmission rod, a second transmission rod, and a connecting element. The first transmission rod has an external thread and is adapted to the internal thread of the attached sleeve. The proximal end of the connecting element is sleeved on the distal end of the first transmission rod, and the distal end is sleeved on the proximal end of the second transmission rod, forming an axial limit with the proximal end of the second transmission rod, and can rotate relative to the second transmission rod; The distal end of the first transmission rod can contact the proximal end of the second transmission rod; The clamping element is pinned to the second transmission rod inside the base.

9. The valve clamping device according to claim 8, characterized in that, It also includes drive pins and retaining pins; The clamping element includes a first clamping element and a second clamping element, both of which include a connecting arm, and the connecting arm includes a drive groove; The drive pin connects the distal end of the connecting arm to the second transmission rod and the base respectively, and can be driven to slide axially relative to the base; The fixing pin portion is located within the drive slide groove and can slide relative to the drive slide groove.

10. A valve repair system, characterized in that, include: The valve clamping device as described in any one of claims 1-9; A delivery system for delivering and driving the valve clamping device; A platform is used to support and stabilize the conveying system.

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