Clutch device, delivery system and interventional treatment system

Abstract

In the field of medical device technology, a clutch device, a delivery system, and an interventional treatment system are provided. The clutch device is disposed at the distal end of a catheter for connecting or disconnecting an implant. The clutch device includes at least two clamping members, each comprising an elastic portion and a clamping portion. The elastic portion connects the distal end of the catheter and the clamping portion, such that the clamping members open at a first angle to the central axis of the clutch device in their natural state. The distal ends of the clamping portions include grooves on both sides. Under external force, at least two clamping members clamp in parallel, forming a gap between the edges of the clamping portions of adjacent clamping members. The grooves of adjacent clamping members abut to form an opening intersecting the gap. The above-mentioned clutch device, delivery system, and interventional treatment system connect the implant to the distal end of the catheter during implant delivery and enable rapid disconnection of the implant after implantation. The operation is simple, applicable to complex surgical environments, and reduces harm or discomfort to the patient.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more particularly to a clutch device, delivery system and interventional treatment system. Background Technology

[0002] Medical devices are playing an increasingly important role in disease diagnosis and treatment. Transcatheter interventional therapy can achieve better therapeutic effects with smaller incisions and is more conducive to postoperative recovery, thus gaining rapid development. Operators often rely on image guidance when delivering and manipulating implanted medical devices via catheters, but they still face challenges from the complex environment inside the patient's body. Continuous improvement of medical devices and their performance is necessary; for example, the detachment and removal performance of implanted medical devices needs further refinement. Summary of the Invention

[0003] In view of this, this application provides a clutch device, a delivery system, and an interventional treatment system that have better disengagement performance for delivered implants, thereby improving the effectiveness of transcatheter interventional treatment.

[0004] In a first aspect, this application provides a clutch device disposed at the distal end of a catheter for connecting or disconnecting an implant. The clutch device includes at least two clamping members, wherein each clamping member includes an elastic portion and a clamping portion. The elastic portion is connected between the distal end of the catheter and the clamping portion, such that the clamping member is open relative to the central axis of the clutch device in its natural state, and the distal ends of the clamping portions include grooves on both sides. Under the action of external force, at least two clamping members clamp in parallel, and there is a gap between the side edges of the clamping portions of adjacent clamping members, and the grooves of adjacent clamping members are joined to form an opening that intersects with the gap.

[0005] In one implementation of the first aspect, the clamping part has a hollow structure, which is disposed between a first position and a second position. The first position is the location of the groove, and the second position is the location of the connection between the elastic part and the clamping part.

[0006] Furthermore, the clasping portion has a flat section that extends from the hollow structure to the far edge of the clasping portion, and the flat section has arc-shaped sections on both sides, with grooves disposed within the arc-shaped sections.

[0007] In one implementation of the first aspect, when at least two clamping members are clamped in parallel, the opening of the groove mating of adjacent clamping members is perpendicular to the gap between the edges of the clamping portions of adjacent clamping members.

[0008] In one implementation of the first aspect, the opening is used to accommodate the protruding portion of the connecting structure of the implant, and the thickness of the engaging portion matches the depth of the slots on both sides of the protruding portion of the connecting structure, such that the slots engage with the edges of the grooves.

[0009] Secondly, this application provides a clutch device disposed at the distal end of a catheter for connecting or disconnecting an implant. The clutch device includes at least two clamping members, each clamping member comprising an elastic portion and a clamping portion. The elastic portion is connected between the distal end of the catheter and the clamping portion, such that the clamping members are open relative to the central axis of the clutch device in their natural state; and under the action of an external force, the at least two clamping members clamp in parallel. The clamping portion includes a first segment and a second segment. The proximal end of the first segment is connected to the elastic portion, and the distal end of the first segment is connected to the second segment. The width of the second segment is greater than the width of the first segment, such that when the at least two clamping members clamp in parallel, the width of the first gap formed between the side edges of the first segment of the clamping portion of adjacent clamping members is greater than the width of the second gap formed between the side edges of the second segment. The second segment occupies less than or equal to 1 / 3 of the clamping portion in a first direction, the first direction being the direction in which the clamping portion extends from the proximal end connected to the elastic portion to the distal end of the clamping portion.

[0010] In one implementation of the second aspect, the width of the second segment is 10%-50% greater than the width of the first segment (including boundary values).

[0011] In one implementation of the second aspect, the engaging portion is provided with an opening having the following optional positions: the opening is located at the junction of the first segment and the second segment, with the proximal edge of the opening located in the first segment and the distal edge located in the second segment; or, the opening is located in the first segment, with the distal edge of the opening located at or near the junction of the first segment and the second segment; or, the opening is located in the second segment, with the proximal edge of the opening located at or near the junction of the first segment and the second segment.

[0012] When the clutch device engages the implant, the opening is used to accommodate the protruding portion of the implant's connecting structure. In other implementations, the opening may be omitted, allowing the protruding portion of the implant's connecting structure to be accommodated within the first slit.

[0013] In one implementation of connecting the clutch device to the implant, the thickness of the engaging portion matches the depth of the slots on both sides of the protruding portion of the connecting structure, so that the slots engage with the edges of the grooves.

[0014] In another implementation of the second aspect, the width of the first slit matches the protruding portion of the connecting structure of the implant, which is accommodated in the first slit and abuts against the second segment when the clutch device engages the implant.

[0015] In one implementation of the second aspect, the clasping part has a hollow structure, which is set in the first segment.

[0016] Furthermore, the width of the hollow structure accounts for 40%-90% of the width of the first segment.

[0017] In one implementation of the second aspect, the width of the second gap can be zero or greater than zero.

[0018] In one implementation of the first or second aspect, the engaging member further includes a mating member disposed at the connection between the elastic part and the engaging part, extending into the internal space of the clutch device; the mating member has a through hole, and when the through holes of the mating members of at least two engaging members are abutted together, the at least two engaging members engage in parallel.

[0019] Furthermore, the mating member includes a connecting portion and a mating portion, a through hole penetrating the mating portion, and the mating portion having a first thickness that matches the pitch of the external thread structure of the delivery rod that provides external force.

[0020] Thirdly, a delivery system is provided for delivering an implant, the delivery system comprising an implantation catheter and a clutch device of either the first or second aspect above; the clutch device is disposed at the distal end of the implantation catheter for connecting or disconnecting the implant; a delivery rod is inserted into the implantation catheter, and when delivering the implant, the distal end of the delivery rod applies an external force to the clamping member of the clutch device, such that at least two clamping members clamp in parallel, and when disconnecting the implant, the delivery rod removes the external force from the clamping member of the clutch device.

[0021] In one implementation of the third aspect, the delivery rod includes a first segment and a second segment, wherein the hardness of the first segment is greater than that of the second segment.

[0022] In one implementation of the third aspect, the delivery rod includes one or a combination of at least two of the following structures: a metal cable structure, a hybrid structure of a metal cable and a nickel-titanium wire, a stainless steel rod structure, or a nickel-titanium rod structure. Optionally, the delivery rod further includes a spring structure.

[0023] In one implementation of the third aspect, the distal end of the delivery rod has an external thread structure, the clutch device has a mating part, and the thickness of the mating portion of the mating part matches the pitch of the external thread structure.

[0024] In one implementation of the third aspect, the distal section of the delivery rod is non-circular.

[0025] In one implementation of the third aspect, the distal end face of the delivery rod has a raised structure.

[0026] Fourthly, an interventional treatment system is provided, including an implant and any of the delivery systems described in the third aspect above, wherein a connecting structure is provided at the proximal end of the implant; the delivery system is used to deliver the implant, wherein during delivery of the implant, at least two engaging members of a clutch device engage in parallel and are connected to the connecting structure.

[0027] In one implementation of the fourth aspect, the connecting structure includes a protrusion that is received in an opening in one implementation of the first or second aspect, or in a second gap in one implementation of the second aspect, when the clutch device is connected to the implant.

[0028] Furthermore, the connecting structure also includes a flat portion to engage with the flat section of the clutch member in one implementation of the first aspect.

[0029] Furthermore, the two sides of the protruding portion form grooves with the intersecting surfaces, and the depth of the grooves matches the thickness of the engaging portions of at least two engaging members of the clutch device.

[0030] The above-mentioned clutch device, delivery system and interventional treatment system connect the implant to the distal end of the catheter during the implant delivery process, and can quickly remove the implant after implantation. The operation is simple and can be applied to complex surgical environments, reducing harm or discomfort to patients. Attached Figure Description

[0031] The following is a brief introduction to the accompanying drawings used in the description of the embodiments of this application:

[0032] Figure 1 This is a schematic diagram of a treatment application scenario used in the embodiments of this application;

[0033] Figure 2 This is a structural block diagram of an interventional therapy system provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of a valve repair system provided in an embodiment of this application;

[0035] Figure 4 This is a magnified schematic diagram of the distal end of an interventional treatment system for which the implant is a valve clamping device, as provided in an embodiment of this application.

[0036] Figure 5 This is a magnified schematic diagram of the distal end of an interventional treatment system with an implant as an occluder, provided in an embodiment of this application;

[0037] Figure 6 This is a three-dimensional structural diagram of a clutch device in its natural state, provided in an embodiment of this application.

[0038] Figure 7 This is a three-dimensional structural diagram of a clutch device under external force according to an embodiment of this application;

[0039] Figure 8 This is a side view of a clutch device provided in an embodiment of this application;

[0040] Figure 9 This is a schematic diagram of a connection structure provided in an embodiment of this application;

[0041] Figure 10 This is a schematic diagram of another connection structure provided in an embodiment of this application;

[0042] Figure 11 This is a three-dimensional structural diagram of a clutch device connected to an implant provided in an embodiment of this application;

[0043] Figure 12 This is a three-dimensional structural schematic diagram of another clutch device connected to an implant provided in an embodiment of this application;

[0044] Figure 13 yes Figure 12 A side view of the clutch device connected to the implant;

[0045] Figure 14 This is a three-dimensional structural schematic diagram of another clutch device connected to an implant provided in the embodiments of this application;

[0046] Figure 15 This is a schematic diagram of the structure of a delivery rod provided in an embodiment of this application;

[0047] Figure 16 This is a schematic diagram of another delivery rod provided in an embodiment of this application;

[0048] Figure 17 This is a schematic diagram of another delivery rod provided in an embodiment of this application;

[0049] Figure 18 This is a cross-sectional schematic diagram of the main structure of an implant provided in an embodiment of this application;

[0050] Figure 19 This is a plan view of a protruding structure provided in an embodiment of this application;

[0051] Figure 20 This is a plan view of another protruding structure provided in an embodiment of this application;

[0052] Figure 21 This is a plan view of another protruding structure provided in the embodiments of this application. Detailed Implementation

[0053] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. The accompanying drawings described below are merely some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Adjustments and improvements made without departing from the concept of this application are all within the protection scope of this application.

[0054] To keep the drawings concise, the figures in this application only schematically show the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, to make the drawings concise and easy to understand, some figures only schematically show parts of components with the same structure or function; in reality, there may be more or fewer components with the same structure or function.

[0055] In this application, unless otherwise expressly specified and limited, ordinal numbers, such as "first," "second," etc., are used only to distinguish and describe related objects, and should not be construed as indicating or implying the relative importance or order between related objects; furthermore, they do not represent the number of related objects. "And / or" is used to describe the relationship between related objects, which includes any relationship between the related objects; for example, "a and / or b" includes: "a alone," "b alone," or "a and b." The terms "installation" and "connection" should be interpreted broadly; for example, "installation" can be direct installation or installation via other components; "connection" can be direct connection or connection via other components. The term "relative arrangement" includes parallel relative or relative at a certain angle, the angle of which is not limited and is determined according to the number of objects in the relative arrangement.

[0056] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) are relative rather than absolute when describing the structure and movement of the various components, and are not intended to limit the direction of the product during actual use.

[0057] In the embodiments of this application, "proximal end" refers to the end of the associated object closer to the operator; "distal end" refers to the end of the associated object farther from the operator. "Proximal end" and "distal end" are the position or orientation of the associated object (e.g., a component of a medical device) relative to the operator (e.g., a doctor) from the perspective of the operator using the device (e.g., a medical device). For example, "proximal end" refers to the end closer to the doctor during normal operation of the medical device, while "distal end" refers to the end farther from the doctor during normal operation of the medical device, that is, the end that first enters the patient's body.

[0058] Medical devices are playing an increasingly important role in disease diagnosis and treatment. Transcatheter interventional therapy, which achieves therapeutic effects through smaller incisions and facilitates better postoperative recovery, has therefore experienced rapid development. For example, in the treatment of heart disease, please refer to... Figure 1This is a schematic diagram of a therapeutic application scenario used in an embodiment of this application, illustrating the structure of the heart: the heart is a hollow muscular organ with four chambers, namely the left atrium (LA) 11, the right atrium (RA) 21, the left ventricle (LV) 12, and the right ventricle (RV) 22. Atrioventricular valves (hereinafter referred to as valves) are located between the atria and ventricles. During ventricular diastole, the valves open, allowing blood to flow from the atria into the ventricles; during ventricular systole, the valves close, preventing blood from flowing back from the ventricles into the atria. The valve between the left atrium 11 and the left ventricle 12 is the mitral valve (MV) 13, and the valve between the right atrium 21 and the right ventricle 22 is the tricuspid valve (TV) 23. The mitral valve 12 has two leaflets, extending downwards into the ventricular cavity, and is connected to the left ventricular wall via chordae tendineae 14 and papillary muscles 15. The tricuspid valve 23 has three leaflets, extending downwards into the ventricular cavity, and is connected to the right ventricular wall via chordae tendineae 24 and papillary muscles 25.

[0059] In one example, among congenital heart diseases, ventricular septal defect (VSD, i.e., a "hole" between left ventricle 12 and right ventricle 22), atrial septal defect (ASD, i.e., a "hole" between left atrium 11 and right atrium 21), and patent ductus arteriosus are several common congenital intracardiac malformations. During transcatheter interventional treatment, an occluder can be implanted to close defects in the left or right ventricles or atria, or the passage between the aorta and pulmonary artery.

[0060] In another example, when valves cannot open and close properly, it affects blood circulation. For instance, mitral or tricuspid regurgitation are extremely common types of valvular disease. In these cases, an opening that cannot be closed occurs at the center or one side of the valve's occlusal margin. Edge-to-edge repair is a treatment method for these conditions, where the valve leaflets are aligned at the opening to reduce the opening area when the valve closes, thus decreasing the amount of regurgitated blood. In transcatheter interventional therapy, valve clamping devices can be used as implantable devices for edge-to-edge repair of mitral or tricuspid regurgitation.

[0061] In the above examples, the surgeon repairs the affected area via catheter under the guidance of imaging (such as ultrasound). For example, the surgeon may close defects in the left or right ventricles or left or right atria (including atrial septal defects, patent foramen ovale, etc.), close the left atrial appendage, or repair valves. Due to the complex environment of the affected area and the normal beating of the heart during the operation, it is particularly important to improve the disengagement performance of the implant to facilitate the surgeon's operation and make the implant more suitable for complex surgical environments, thereby reducing harm or discomfort to the patient.

[0062] The following description is in conjunction with the accompanying drawings:

[0063] Please refer to Figure 2This is a structural block diagram of an interventional treatment system provided in an embodiment of this application. Figure 2 As shown, the interventional treatment system includes an implant 100 and a delivery system 200. The delivery system 200 is used to deliver (or transport) and control the implant 100. The delivery system 200 includes a catheter 210 and a delivery device 220. The distal end of the catheter 210 is detachably connected to the implant 100 under the control of the delivery device 220. When the delivery device 220 delivers the implant 100 to the desired location through the catheter 210, after controlling the implant 100 to complete the implantation, it further controls the implant 100 to detach from the distal end of the catheter 210 and remain in the patient's body.

[0064] The catheter 210 may employ a multi-layer catheter structure, comprising at least two layers of catheters, wherein the outer layer provides an operating channel for the other catheters, and the inner layer controls the implantation of the implant 100. The delivery device 220 includes a control handle that controls the distal movement of the catheter 210 and controls the implantation and detachment of the implant 100.

[0065] The following description uses a valve repair system as an example:

[0066] Please refer to Figure 3 This is a schematic diagram of the structure of a valve repair system provided in an embodiment of this application. Figure 3 As shown, the valve repair system includes a valve clamping device 100' and a delivery system 200'. The delivery system 200' is used to deliver and control the valve clamping device 100'. The delivery system 200' includes a catheter 210' and a delivery device 220'. The distal end of the catheter 210' is detachably connected to the valve clamping device 100' under the control of the delivery device 220'. When the delivery device 220' delivers the valve clamping device 100' to the desired position through the catheter 210', after controlling the valve clamping device 100' to complete the capture and clamping of the valve leaflets, the valve clamping device 100' is controlled to detach from the distal end of the catheter 210' and remain in the patient's body.

[0067] In one implementation, the delivery system 200' may employ a three-layer structure, wherein the catheter 210' (also referred to as the delivery sheath) includes an outer guiding catheter 211 (also referred to as the guiding sheath), a middle manipulating catheter 212 (also referred to as the manipulating sheath), and an inner implantation catheter 213 (also referred to as the implantation sheath). The proximal end of the catheter 210' can be controlled via a control handle to move the distal end of the catheter 210', for example, as... Figure 3As shown, the delivery system 200' includes a guide tube handle 221, a control catheter handle 222, and an implantation catheter handle 223, respectively disposed at the proximal ends of the guide tube 211, control catheter 212, and implantation catheter 213, for controlling the distal movement of the guide tube 211, control catheter 212, and implantation catheter 213. During operation, the guide tube handle 221 controls the distal movement of the guide tube 211, allowing the guide tube 211 to enter the patient's body, providing an operating channel for the control catheter 212; the control catheter handle 222 controls the distal movement of the control catheter 212, providing an operating channel for the implantation catheter 213. The guide tube 211 and control catheter 212 are, for example, adjustable catheters, capable of omnidirectional bending (anterior-posterior, lateral, and lateral), bringing flexibility and convenience to the operation. The valve clamping device 100' is detachably mounted on the distal end of the implantation catheter 213. The implantation catheter handle 223 controls the movement of the distal end of the implantation catheter 213, delivering the valve clamping device 100' to the affected area. A delivery rod can be installed inside the implantation catheter 213. Figure 3 (Not shown in the figure, see 214 in the following figures), and a control mechanism 2231 (e.g., a control handle) can be provided on the implantation catheter handle 223. This control mechanism 2231 is connected to the proximal end of the delivery rod, and the distal end of the delivery rod provides a driving force to the valve clamping device 100' to control the state of the valve clamping device 100', thereby realizing the capture and clamping of the valve leaflets by the valve clamping device 100'. Furthermore, other control mechanisms can be provided on the implantation catheter handle 223 to control other operations of the valve clamping device 100'. For example, a control mechanism can also be provided to control the state of the grasping member of the valve clamping device 100', so as to control the grasping member to open toward the clamping member during the capture of the valve leaflets, so as to capture the valve leaflets; another example is that a control mechanism can also be provided to control the connection state between the valve clamping device 100' and the distal end of the implantation catheter 213, so as to control the valve clamping device 100' to disengage from the distal end of the implantation catheter 213 after the capture and clamping of the valve leaflets is completed.

[0068] Furthermore, the above delivery system 200' can be mounted on a support, which can provide support for the delivery system 200' and improve the stability of the valve repair system.

[0069] The above-described delivery system 200' is merely an example. In other embodiments, other structures can be employed. For instance, the control handle and its control mechanism can be adjusted to integrate some of the control handle's functions, or the control mechanism on the control handle can be set independently, or some control functions can be integrated or separated from the control handle. Furthermore, the above-described delivery system 200' can also be used for the delivery of other implants, such as occluders. In this case, the operation of the control handle can be adjusted to suit the operation of the occluder. Figure 4 and Figure 5As shown, it illustrates an enlarged schematic diagram of the distal end of the interventional treatment system when the implants are a valve clamping device 100' and an occluder 100" respectively. In other embodiments, the implants may also be medical implantable devices for the treatment of other diseases. The embodiments of this application are not limited to the type of implant. Figures 2-5 As shown, the proximal end of the implant 100 (e.g., valve clamping device 100' and occluder 100") is provided with a connecting structure 111. A delivery system 200 (e.g., delivery system 200') is used to deliver the implant 100, including an implantation catheter (or inner catheter) 213 for delivering the implant 100. The distal end of the implantation catheter 213 is provided with a clutch device 215 for connecting or disconnecting the implant 100. The connecting structure 111 at the proximal end of the implant 100 cooperates with the clutch device 215 to achieve the connection or disconnection of the implant 100. That is, it is used to achieve the connection or disconnection of the implant. The clutch system for connecting and disconnecting the implant 100 includes a portion of the implant 100 (connection structure 111) and a portion of the delivery system 200 (clutch device 215). The delivery system 200 also includes a delivery rod 214, which passes through the implantation catheter 213. When delivering the implant 100, the distal end of the delivery rod 214 applies external force to the clutch device 215, so that the clutch device 215 stably connects to the implant 100. When disconnecting the implant 100, the delivery rod 214 removes external force from the clutch device 215, thereby achieving rapid disengagement of the implant 100 from the clutch device 215.

[0070] In the process of transcatheter interventional therapy, after the implanted device (such as the valve clamping device or occluder in the above embodiments) is delivered to the affected area and implanted, it is of great significance to find a way to more easily and quickly disconnect the implanted device from the catheter in order to reduce the difficulty of operation for the operator.

[0071] In view of this, embodiments of this application provide a clutch device, a delivery system, and an interventional treatment system for connecting an implant to the distal end of a catheter during implant delivery and for quickly detaching the implant after implantation. The system is simple to operate, applicable to complex surgical environments, and reduces harm or discomfort to patients.

[0072] Please refer to Figure 6-7 This is a three-dimensional structural schematic diagram of a clutch device provided in an embodiment of this application, wherein... Figure 6 This is a schematic diagram of the clutch device in its natural state. Figure 7This is a schematic diagram of the clutch device under external force. The clutch device 215 is disposed at the distal end of the implantation catheter 213 and is used to connect or disconnect the implant. The clutch device 215 includes at least two clamping members 2150, each clamping member 2150 including an elastic portion 2151 and a clamping portion 2152. The elastic portion 2151 is connected between the distal end of the implantation catheter 213 and the clamping portion 2152, such that the clamping member 2150 opens relative to the central axis of the clutch device 215 (shown by the dotted line in the figure) in its natural state (i.e., without external force). Grooves 52-1 are provided on both sides of the distal end of the clamping portion 2152. Under external force, at least two clamping members 2150 clamp in parallel, and there is a gap S between the side edges of the clamping portions 2152 of adjacent clamping members 2150, and the grooves 52-1 of adjacent clamping members 2150 are joined to form an opening intersecting with the gap S.

[0073] Thus, during implant delivery, the implant's connecting structure is engaged by the grooved opening, locking the implant at the distal end of the clutch device. When external force is removed, the clutch opens naturally. Because the opening is formed by the mating joint, it quickly releases the engagement of the connecting structure, allowing for rapid implant detachment. This rapid detachment is possible even in complex surgical environments, reducing harm or discomfort to the patient. The surgeon can also perform a simple and quick operation by simply removing the component applying external force, overcoming less resistance and reducing operational difficulty, thereby improving surgical outcomes.

[0074] The aforementioned clamping element 2150 opens at a first angle relative to the central axis (shown by the dotted line in the figure) in its natural state. This first angle is, for example, an acute angle, ranging from 20° to 40° (including the boundary value). This configuration balances disengagement efficiency with minimizing the impact of the opened clamping element 2150 on the surrounding tissues at the implantation site.

[0075] Optionally, the opening of the groove 52-1 of the adjacent clamping member 2150 is perpendicular to the gap S between the side edges of the clamping portion 2152 of the adjacent clamping member 2150. In this way, when the clamping members are clamped in parallel, they can provide a more stable connection for the implant, and during disengagement, they will experience less resistance or interference, and can be released more quickly.

[0076] In some embodiments of this application, the engaging member 2150 may further include an engaging member 2153, which is disposed at the connection between the elastic portion 2151 and the engaging portion 2152 and extends into the internal space of the clutch device 215; the engaging member 2153 has a through hole 53-1, and when the through holes 53-1 of the engaging members 2153 of at least two engaging members 2150 are abutted together, the at least two engaging members 2150 engage in parallel. When not subjected to external force, the engaging members 2150 open relative to the central axis (shown by the dotted line in the figure). When the implant 100 is delivered, the distal end 2141 of the delivery rod 214 passes through the implantation catheter 213 and further passes through the through hole 53-1 of the engaging member 2153, causing the different engaging members 2150 to engage together (e.g., Figure 7 (As shown). After the implant 100 is implanted, the operator can control the delivery rod 214 to be pulled out from the mating member 2153, and the clamping member 2150 opens without external force, releasing the connecting structure 111 of the implant 100. The mating member 2153 is located at the connection between the elastic part 2151 and the clamping part 2152, which makes it easier for the delivery rod 214 to pass through the through hole 53-1.

[0077] In other embodiments, the mating members may not be provided, and the external force may be provided by the sleeve. When the implant 100 is delivered, the sleeve may be fitted onto at least two clamping members 2150, so that at least two clamping members 2150 are parallel and clamped together. After the implant 100 is implanted, the operator can control the sleeve to be pulled out from the implantation catheter 213, and the at least two clamping members 2150 will open to realize the removal of the implant.

[0078] Furthermore, please refer to the references. Figure 8 This is a side view of a clutch device provided in an embodiment of this application. The engaging member 2153 includes a connecting portion 53-2 and an engaging portion 53-3, with a through hole 53-1 penetrating the engaging portion 53-3. The engaging portions 53-3 of the engaging members 2153 of different engaging members 2150 have a positional difference of at least a first thickness on their respective engaging members 2150. Thus, when at least two engaging members 2150 are engaged in parallel, the engaging portions 53-3 can engage together, thereby aligning the through hole 53-1. This first thickness is the thickness of the engaging portion 53-3. In one implementation, the above positional difference can be achieved by designing different lengths for the connecting portions 53-2 of different engaging members 2153; in another implementation, the above positional difference can be achieved by varying the position of the connecting portions of different engaging members on their respective engaging members.

[0079] In the embodiments shown above, after the delivery rod 214 is removed from the mating member 2153, the shape of the opening changes simultaneously when the clamping member 2150 is opened, becoming a groove independent of the different clamping members, and quickly releasing the connection structure of the implant.

[0080] In some embodiments of this application, the engaging portion 2152 has a hollow structure 52-2, which is disposed between a first position and a second position. The first position is where the groove 52-1 is located on the engaging portion 2152, and the second position is where the connection between the elastic portion 2151 and the engaging portion 2152 is located on the engaging portion 2152. This allows for material reduction in the engaging portion 2152, resulting in greater toughness and lower stiffness during the opening and closing movements of connecting and disconnecting the implant.

[0081] The figure shows two clamping members 2150 as an example, and the clamping members 2150 are arranged opposite to each other; in other embodiments, more clamping members 2150 may be included, which are symmetrically distributed on the periphery of the catheter 213 or symmetrically arranged with respect to the central axis.

[0082] In some embodiments of this application, please refer to [the relevant documentation]. Figure 8 The engaging portion 2152 has a flat section 52-3, which extends from the hollow structure 52-2 to the distal edge of the engaging portion 2152. The flat section 52-3 has arc-shaped sections 52-4 on both sides, and the groove 52-1 is disposed within the arc-shaped sections 52-4. This structural design of the flat section allows for better engagement with the connecting part of the implant when the clutch device connects to the implant. This not only maintains a stable connection of the implant in the connected state but also reduces resistance during disengagement, enabling rapid disengagement.

[0083] Accordingly, please refer to Figure 9 and Figure 10 This is a schematic diagram of two connection structures provided in the embodiments of this application. For example... Figure 9 and Figure 10 As shown, the implant 100 includes a main body 110, and a connecting structure 111 is provided at the proximal end of the main body 110, and the connecting structure 111 has a protruding portion 1111; as shown, when the implant 100 is delivered, at least two engaging members 2150 of the clutch device 215 engage in parallel, the protruding portion 1111 of the connecting structure 111 is accommodated in the opening, and the implant 100 is connected to the clutch device 215; when the implantation of the implant 100 is completed, at least two engaging members 2150 of the clutch device 215 open in the natural state, the protruding portion 1111 of the connecting structure 111 disengages from the opening, and the implant 100 is detached from the clutch device 215.

[0084] like Figure 9As shown, in some embodiments of this application, the connecting structure 111 has a flat portion 1112 to match the flat section 52-3 of the engaging portion 2152 in the above embodiments, so that the clutch device 215 and the connecting structure 111 of the implant 100 fit better. In this way, not only can the implant be kept stably connected in the connected state, but also the resistance force can be reduced during disassembly, and disassembly can be completed quickly.

[0085] like Figure 10 As shown, in some embodiments of this application, the two sides of the protruding portion 1111 form a groove 1113 with the intersecting surface 1112', and the depth of the groove 1113 matches the thickness of the engaging portion 2152 of the engaging member 2150 of the clutch device 215. Further reference... Figure 11 This is a three-dimensional structural diagram of a clutch device connected to an implant, provided in an embodiment of this application. Figure 11 As shown, when the clutch device 2150 clamps in parallel, the edge of the groove 52-1 engages with the slot 1113. At this time, the engagement of the slot 1113 of the connecting structure 111 with the edge of the groove 52-1 further improves the connection stability between the clutch device and the implant.

[0086] In the above embodiments, the grooves 52-1 of the different engaging members 2150 are symmetrically arranged. In other embodiments, the grooves 52-1 of the different engaging members 2150 can be asymmetrically arranged, that is, the size of the grooves 52-1 (e.g., Figure 8 As shown, the lateral depth (H) of the grooves on the clamping portion 2152 is different. Thus, the connecting structure of the implant accommodated in the opening has the same or different proportions in the portions of the different grooves. For example, in two adjacent clamping members, the size of the groove on one clamping member (referred to as the first clamping member for distinction) is larger than the size of the groove on the other clamping member (referred to as the second clamping member for distinction). Thus, when the two clamping members clamp together, the proportion of the connecting structure accommodated in the opening in the first clamping member is greater than the proportion in the second clamping member. This application does not limit this proportion.

[0087] The following description uses the valve clamping device 100' as an example to illustrate the role of the clutch device in the delivery and removal of the implant. Please refer to the following for further details. Figure 11 and further reference Figure 12 and Figure 13These are a three-dimensional structural schematic diagram and a side view of another clutch device connected to an implant provided in the embodiments of this application. The clutch device 215 includes at least two clamping members 2150, each clamping member 2150 including an elastic portion 2151 and a clamping portion 2152. The elastic portion 2151 is connected between the distal end of the implantation catheter 213 and the clamping portion 2152, such that the clamping member 2150 opens relative to the central axis in a natural state (i.e., without external force). The distal end of the clamping portion 2152 is provided with an opening O. The opening O matches the connection structure 111 of the implant. When the clamping member 2150 clamps against the proximal end of the implant under the action of external force, the different clamping members 2150 clamp in parallel, and there is a gap S between the edges of the clamping portions 2152 of adjacent clamping members 2150. The connection structure 111 of the implant extends into the opening O, locking the implant at the distal end of the clutch device 215.

[0088] Compared with existing clutch devices, the clutch device 215 uses a clamping method to connect the implant, making it easier to remove the implant after it has been implanted.

[0089] The opening O can be formed by providing a groove 52-1 at the distal end of the clamping member 2150 in the above embodiments, so that the clamping members 2150 are aligned when they are parallel. In other embodiments, the opening O can also be formed entirely at the non-edge position of the clamping portion 2152.

[0090] For example, please refer to Figure 14 This is a three-dimensional structural diagram of another clutch device connected to an implant provided in this application embodiment. The clutch device differs from previous embodiments in that the opening O is fully disposed at the distal end of the engaging portion 2152. For example... Figure 14As shown, the clutch device 215 includes an elastic part 2151 and a clamping part 2152. The elastic part 2151 is connected between the distal end of the conduit 213 and the clamping part 2152, so that the clamping member 2150 is open relative to the central axis of the clutch device in its natural state, and at least two clamping members 2150 are clamped in parallel under the action of external force. The engaging portion 2152 includes a first segment 52-P1 and a second segment 52-P2. The proximal end of the first segment 52-P1 is connected to the elastic portion 2151, and the distal end of the first segment 52-P1 is connected to the second segment 52-P2. The width of the second segment 52-P2 is greater than the width of the first segment 52-P1, such that when at least two engaging members 2150 engage in parallel, the width of the first gap S1 formed between the side edges of the first segment 52-P1 of the engaging portion 2152 of the adjacent engaging members 2150 is greater than the width of the second gap S2 formed between the side edges of the second segment 52-P2. The proportion of the second segment 52-P2 in the engaging portion 2152 in a first direction is less than or equal to 1 / 3, for example, 10%-30% (including boundary values). The first direction is the direction in which the engaging portion 2152 extends from the proximal end connected to the elastic portion 2151 to the distal end of the engaging portion 2152.

[0091] The above-mentioned clutch device can improve the connection stability of the implant by using a larger contact area in the second segment when connecting the implant, and it also creates a larger gap S1 between the first segments, reducing interference and allowing for faster removal of the implant during disassembly. This balances stability and ease of disassembly.

[0092] Furthermore, the width of the second segment 52-P2 is 110%-150% (including boundary values) of the width of the first segment 52-P1, meaning the width of the second segment is 10%-50% greater than the width of the first segment. This further improves the connection stability of the implant during delivery. The width of the second gap S2 can be zero, meaning that when adjacent clamping members 2150 are parallel and clamped, the lateral edges of the second segment 52-P2 make contact, increasing the clamping contact area and further improving stability. Alternatively, as... Figure 14 The width of the second slit S2 can be greater than zero, which allows for faster removal of the implant.

[0093] The location of the opening O can be implemented in several ways: In one implementation, the opening O is located at the junction of the first segment 52-P1 and the second segment 52-P2, and the proximal edge of the opening O is located at the first segment 52-P1, and the distal edge is located at the second segment 52-P2; In another implementation, the opening O is located at the first segment 52-P1, and the distal edge of the opening O is located at or near the junction of the first segment 52-P1 and the second segment 52-P2; In yet another implementation, the opening O is located at the second segment 52-P2, and the proximal edge of the opening O is located at or near the junction of the first segment 52-P1 and the second segment 52-P2.

[0094] In other embodiments, the first gap can also be used to engage the connection structure of the implant, thus eliminating the need for an opening. For example, the width of the first gap S1 matches the protrusion 1111 of the connection structure 111 of the implant. When the clutch device 215 engages the implant 100, the protrusion 1111 is accommodated in the first gap S1 and abuts against the second segment 52-P2. This is similar to the above. Figures 6-8 In the illustrated embodiment, the first slit is joined together. After the external force is removed, the first slit and the second segment quickly disengage from the connecting structure, allowing for rapid removal of the implant. This rapid removal is possible even in complex surgical environments, reducing harm or discomfort to the patient. The surgeon can also perform a simple and quick operation by simply removing the component applying the external force, with less resistance to overcome, reducing the difficulty for the operator and improving surgical outcomes.

[0095] Furthermore, similar to the embodiments described above, the implant can be adopted... Figure 10 The connecting structure 111 shown here, at this time, the slot 1113 of the connecting structure 111 and the edge of the first gap S1 engage with the clamping part 2152, further improving the connection stability between the clutch device and the implant.

[0096] Furthermore, the clutch device 215 may also have a structure similar to the clutch device in the above embodiments, such as the engaging member 2153 and the hollow structure 52-2. The difference is that the hollow structure 52-2 is located in the first segment 52-P1. In one implementation, the width of the hollow structure 52-2 accounts for 40%-90% (including boundary values) of the width of the first segment 52-P1. In this way, the connection stability of the engaging part 2152 to the implant can be satisfied, and the width of the first gap S1 can be maximized, thereby improving the ease of removal.

[0097] Accordingly, this application embodiment also provides a delivery system 200, which includes an implantation catheter 213 and any of the above-mentioned clutch devices 215 disposed at the distal end of the implantation catheter for connecting or disconnecting the implant 100. Further, the delivery system 200 also includes a delivery rod 214, which passes through the implantation catheter 213 to provide the external force acting on the clutch device 215. When delivering the implant 100, the distal end of the delivery rod 214 applies the external force to the engaging member 2150 of the clutch device 215, causing at least two engaging members 2150 to engage in parallel. When disconnecting the implant 100, the delivery rod 214 removes the external force from the engaging member 2150 of the clutch device 215. For example, when the delivery rod 214 passes through the through-hole of the mating member 2153 of at least two engaging members 2150, the through-holes of the mating member 2153 are joined together, and at least two engaging members 2150 engage in parallel.

[0098] The delivery rod 214 can be implemented in several ways: in one implementation, such as Figure 15 As shown, the delivery rod 214 includes a first segment 2141 and a second segment 2142, wherein the first segment has a higher stiffness than the second segment. The higher stiffness of the first segment improves delivery efficiency, while the lower stiffness of the second segment reduces the force exerted by the distal end of the delivery rod on the implant, resulting in a more natural implantation state and improved surgical safety and effectiveness. For example, the first segment 2141 is a metal cable (e.g., steel cable) structure, and the second segment 2142 is a spring structure. The spring structure has greater flexibility; during use, the force exerted by the distal end of the flexible delivery rod on the implant is smaller, allowing the implant to maintain a more natural position and making it easier for the surgeon to assess the implant's condition. Simultaneously, the spring structure can extend along the delivery system to prevent the delivery rod from detaching from the clamping element, which could lead to unexpected separation of the clutch and the implant. The spring structure can be as follows... Figure 15 The segment 2141, located at the distal end of the delivery rod 214, can also be located at the proximal end or middle section of the delivery rod 214, serving to increase the flexibility of the delivery rod 214 and extend it along the direction of the conveying system. Furthermore, the first segment 2141 and the second segment 2142 can be connected by a joint 2143, which can be fitted onto the joint of the first segment 2141 and the second segment 2142 to improve the connection strength and the transmission of external forces; and the lengths of the first segment 2141 and the second segment 2142 are not limited, but optionally, the length of the first segment 2141 is greater than the length of the second segment 2142, thereby improving delivery efficiency. In another implementation, such as... Figure 16 As shown, the delivery rod 214 is a metal cable (e.g., steel cable) structure, with the main body made of metal cable, thus achieving high delivery efficiency, ease of processing, and reduced cost; alternatively, the main body can be composed of a mixture of metal cable and nickel-titanium wire to balance delivery efficiency and the elasticity of the delivery rod. In yet another implementation, such as Figure 17As shown, the delivery rod 214 is a nickel-titanium rod structure, meaning the main body is made of a nickel-titanium rod with a diameter ranging from 0.60mm to 0.90mm. This enhances the elasticity of the delivery rod, making it less prone to irreversible deformation when traversing large-angle or multi-bend paths, thus facilitating precise control of the implant's position and its relative angle to the implantation site. In another implementation, the delivery rod 214 is a stainless steel rod structure, meaning the main body is made of a stainless steel rod with a diameter ranging from 0.60mm to 0.90mm, resulting in better torque transmission performance when applied proximally by the surgeon. Understandably, the aforementioned metal cable, spring, nickel-titanium rod, or stainless steel rod can be substituted for or combined with each other in different embodiments. For example, in one embodiment, the first segment 2141 of the delivery rod 214 is a stainless steel rod structure, and the second segment 2142 is a metal cable structure. A shorter stainless steel segment can be provided at the distal end of the second segment 2142. Joints 2143 can be provided at both ends of the metal cable, and a spring segment can be provided at the proximal end of the delivery rod 214. This arrangement can balance the flexibility and delivery efficiency of the delivery rod. Therefore, the delivery rod 214 can be a one-piece structure or a multi-segment structure. In a one-piece structure, the delivery rod includes one of the following: a metal cable structure, a metal cable and nickel-titanium wire hybrid structure, a stainless steel rod structure, or a nickel-titanium rod structure. In a multi-segment structure, the delivery rod includes two or more combinations of the following: a metal cable structure, a metal cable and nickel-titanium wire hybrid structure, a stainless steel rod structure, or a nickel-titanium rod structure, and can be further combined with a spring structure.

[0099] In some embodiments of this application, the distal end of the delivery rod 214 has an external thread structure 2144, including 2-6 threads. The mating portion 53-2 of the mating member 2153 of the clutch device 215 has a first thickness, which matches the pitch of the external thread structure 2144 of the delivery rod 214 that provides external force. Thus, the mating portion 53-2 acts as an internal thread, which, in conjunction with the external thread structure 2144 at the distal end of the delivery rod 214, can improve the connection stability of the clutch device 215 to the implant, especially in scenarios where the delivery rod 214 does not penetrate deeply into the implant 100, for example... Figure 5 As shown, this structure provides better stability during the delivery of the occluder 100”, making it more convenient for the operator to manipulate. In scenarios where the delivery rod 214 extends deep into the implant 100, for example... Figure 4 As shown, in one implementation, when delivering the valve clamping device 100', the delivery rod 214 extends into the body of the valve clamping device 100', thus improving the stability of the connection even when the external thread structure 2144 is not provided at the distal end of the delivery rod 214.

[0100] In some embodiments of this application, the delivery rod 214 can provide an external force acting on the clutch device 215 to engage or disengage the implant 100, and can also provide a force acting on the implant 100 to change the state of the implant. For example, as Figure 18 As shown, the body 110 of the implant 100 may have an internal space 112. The distal portion 2141 of the delivery rod 214 acts on the internal space 112 of the body 110 of the implant 100, so that the operation of the proximal end of the delivery rod 214 can be transmitted and acted on the body 110, thereby changing the state of the implant 100, for example, as... Figure 11-14 As shown, when the implant 100 is a valve clamping device 100', the distal end of the delivery rod 214 acts on the connecting rod 113 or the connecting rod 114, thereby changing the axial position of the connecting rod 113 and causing the clamping body 120 to open and close relative to the main body 110. The cross-sectional shape of the distal end of the delivery rod 214 and the shape of the internal space 112 can be matched with each other, so that the operation of the proximal end of the delivery rod 214 can be transmitted and acted on the connecting rod 113. In one implementation, the cross-sectional shape of the distal part of the delivery rod 214 and the cross-sectional shape of the internal space 112 are not circular, i.e., non-circular. For example, the cross-section of the internal space 112 is elliptical, rectangular, or triangular; or, for example, the cross-section of the internal space 112 is racetrack-shaped, which includes two parallel sides and a symmetrical arc-shaped edge connecting the two sides. The distal cross-section of the delivery rod 214 can be a regular or irregular shape, as long as it mates with the cross-section of the internal space 112 to achieve contact. For example, the distal cross-section of the delivery rod 214 can be non-circular, such as rectangular (including square), or other polygonal shapes. Thus, when the delivery rod 214 moves radially, its distal end, inside the connecting rod 113, can only rotate at a very small angle before its edge abuts against the internal space wall of the connecting rod 113, thereby driving the connecting rod 113 to move axially and radially. In other embodiments, the cross-section of the internal space 112 can also be other regular or irregular shapes, and the distal cross-section of the delivery rod 214 can also be set to other regular or irregular shapes, as long as the delivery rod can quickly abut against the internal space 112 during radial movement.

[0101] In some embodiments of this application, the contact surface between the delivery rod and the implant, i.e., the distal end surface of the delivery rod, has a raised structure. For example, Figure 18 In this design, the contact surface between the delivery rod 214 and the connecting rod 114, i.e., the distal end face of the delivery rod 214, has a protruding structure, which includes, for example, a contact surface with an arc-shaped cross-section. This reduces the contact area between the two contacting surfaces, thereby efficiently transmitting axial motion while minimizing radial rotation transmission. For example, the cross-section of the contact surface could be as follows: Figure 19As shown, the edges have rounded chamfers to reduce the area of ​​the contact portion, thereby reducing the tendency for radial motion to be transmitted, while the remaining planar portion ensures efficient motion transmission; furthermore, the area of ​​the contact surface can be further reduced using a spherical or partially spherical (e.g., hemispherical) surface, such as... Figure 20 As shown. For example, one or more spherical or partially spherical (e.g., hemispherical) microstructures can be provided on the contact surface to reduce the area of ​​the contact surface, such as... Figure 21 As shown.

[0102] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0103] It should be noted that the above embodiments can be freely combined as needed. The above are only some embodiments of this application. For those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A clutch device, characterized in that, Located at the distal end of the catheter for connecting or disconnecting the implant, the clutch device includes at least two engaging members, wherein the engaging members include: The elastic part is connected between the distal end of the conduit and the clamping part, such that the clamping part is open relative to the central axis of the clutch device in its natural state. The clamping part has a flat section, and the flat section has arc-shaped sections on both sides. The arc-shaped sections are provided with grooves, and the grooves are located on both sides of the distal end of the clamping part. Under the action of external force, the at least two clamping members clamp in parallel, and there is a gap between the side edges of the clamping part of the adjacent clamping members. The grooves of the adjacent clamping members are joined to form an opening that intersects with the gap. The opening is used to accommodate the protruding part of the connecting structure of the implant. The thickness of the clamping part matches the depth of the slots on both sides of the protruding part of the connecting structure, so that the slots engage with the edges of the grooves.

2. The clutch device according to claim 1, characterized in that, The clamping component also includes: The engaging component is disposed at the connection between the elastic part and the engaging part, and extends into the internal space of the clutch device; The mating member has a through hole, and when the through holes of the mating members of the at least two clamping members are aligned, the at least two clamping members clamp in parallel.

3. The clutch device according to claim 2, characterized in that, The mating member includes a connecting portion and a mating portion, the through hole penetrates the mating portion, and the mating portion has a first thickness that matches the pitch of the external thread structure of the delivery rod that provides the external force.

4. The clutch device according to claim 1, characterized in that, The clamping part has a hollow structure, which is located between a first position and a second position. The first position is the location of the groove, and the second position is the location of the connection between the elastic part and the clamping part.

5. The clutch device according to claim 4, characterized in that, The flat section extends from the hollow structure to the far edge of the embracing part.

6. The clutch device according to claim 1, characterized in that, When the at least two clamping members are clamped in parallel, the opening of the groove of the adjacent clamping member is perpendicular to the gap between the edges of the clamping portion of the adjacent clamping member.

7. A clutch device, characterized in that, Located at the distal end of the catheter for connecting or disconnecting the implant, the clutch device includes at least two engaging members, wherein the engaging members include: The elastic part is connected between the distal end of the conduit and the clamping part, such that the clamping member is open relative to the central axis of the clutch device in its natural state, and that the at least two clamping members clamp in parallel under the action of external force. The clamping portion includes a first segment and a second segment. The proximal end of the first segment is connected to the elastic portion, and the distal end of the first segment is connected to the second segment. The width of the second segment is greater than the width of the first segment, such that when the at least two clamping members clamp in parallel, the width of the first gap formed between the side edges of the first segment of the clamping portion of the adjacent clamping members is greater than the width of the second gap formed between the side edges of the second segment. The second segment occupies less than or equal to 1 / 3 of the clamping portion in a first direction, wherein the first direction is the direction in which the clamping portion extends from the proximal end connected to the elastic portion to the distal end of the clamping portion. The width of the first gap matches the protruding portion of the connecting structure of the implant. When the clutch device connects the implant, the protruding portion is accommodated in the first gap and abuts against the second segment. The thickness of the engaging portion matches the depth of the slots on both sides of the protruding portion of the connecting structure, so that the slots engage with the edge of the second segment.

8. The clutch device according to claim 7, characterized in that, The width of the second segment is 10% to 50% greater than the width of the first segment.

9. The clutch device according to claim 7, characterized in that, The engaging portion is provided with an opening, wherein: The opening is located at the junction of the first segment and the second segment, with the proximal edge of the opening located in the first segment and the distal edge located in the second segment; or The opening is located in the first segment, and the distal edge of the opening is located at or near the junction of the first segment and the second segment; or, The opening is located in the second segment, and the proximal edge of the opening is located at or near the junction of the first segment and the second segment.

10. The clutch device according to claim 7, wherein the engaging member further comprises: The engaging component is disposed at the connection between the elastic part and the engaging part, and extends into the internal space of the clutch device; The mating member has a through hole, and when the through holes of the mating members of the at least two clamping members are aligned, the at least two clamping members clamp in parallel.

11. The clutch device according to claim 10, characterized in that, The mating member includes a connecting portion and a mating portion, the through hole penetrates the mating portion, and the mating portion has a first thickness that matches the pitch of the external thread structure of the delivery rod that provides the external force.

12. The clutch device according to claim 7, characterized in that, The clasping part has a hollow structure, which is disposed in the first segment.

13. The clutch device according to claim 12, characterized in that, The width of the hollow structure accounts for 40% to 90% of the width of the first segment.

14. The clutch device according to claim 7, characterized in that, The width of the second gap is zero or greater than zero.

15. A delivery system for delivering an implant, characterized in that, include: Implantation of catheters; The clutch device as described in any one of claims 1-14 is disposed at the distal end of the implantation catheter for connecting or disconnecting the implant; A delivery rod is inserted into the implantation catheter, and when delivering the implant, the distal end of the delivery rod applies the external force to the clamping member of the clutch device, so that the at least two clamping members clamp in parallel. When removing the implant, the delivery rod removes the external force from the clamping member of the clutch device.

16. The conveying system according to claim 15, characterized in that, The delivery rod includes a first section and a second section, wherein the hardness of the first section is greater than that of the second section.

17. The conveying system according to claim 15, characterized in that, The delivery rod includes one or a combination of at least two of the following structures: Metal cable structure, metal cable and nickel-titanium wire hybrid structure, stainless steel rod structure, or nickel-titanium rod structure.

18. The conveying system according to claim 15, characterized in that, The delivery rod further includes a spring structure.

19. The conveying system according to claim 15, characterized in that, The distal end of the delivery rod has an external thread structure, and the clutch device has the structure as described in claim 3 or 11.

20. The conveying system according to claim 15, characterized in that, The distal section of the delivery rod is non-circular.

21. The conveying system according to claim 15, characterized in that, The distal end face of the delivery rod has a raised structure.

22. An interventional therapy system, characterized in that, include: An implant, wherein a connection structure is provided at the proximal end of the implant; The delivery system according to any one of claims 15-21 is used to deliver the implant, wherein, during delivery of the implant, at least two engaging members of the clutch device engage in parallel and are connected to the connecting structure.

23. The interventional therapy system according to claim 22, characterized in that, The connection structure includes a protruding portion and a flat portion. The clutch device has the structure as described in claim 5. When the implant is connected to the clutch device, the protruding portion is received in the opening, and the flat portion fits into the flat section of the clutch device's engagement member.

24. The interventional therapy system according to claim 22, characterized in that, The connecting structure includes a protruding portion, the two sides of which form a groove with an intersecting surface, the depth of which matches the thickness of the engaging portion of at least two engaging members of the clutch device, and the clutch device has the structure as described in any one of claims 1-14.

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