A valve delivery device and a valve delivery method

Abstract

The present application relates to a valve delivery device and a valve delivery method, comprising: a first catheter, a second catheter sleeved inside the first catheter, a first flexible member, and a fixing assembly. The first flexible member includes a first end and a second end. The first end is connected to the valve, and the tension state of the first flexible member can be controlled by operating the second end. The fixing assembly is arranged at the distal end of the second catheter along the valve delivery device. The fixing assembly fixes the valve to the distal end of the second catheter by pressing the first end. The first catheter can move relative to the second catheter to accommodate the valve inside the first catheter or release the valve outside the first catheter. Wherein, the fixing assembly can press the first end in the first state to limit the separation of the valve from the valve delivery device, and the fixing assembly can release the pressing of the first end in the second state to enable the valve to automatically separate from the valve delivery device. This device can limit the separation of the valve during the valve release process, thereby solving the problem of valve displacement during the instant of valve release.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a valve delivery device and a valve delivery method. Background Art

[0002] In the field of vascular implantation, especially for implant products such as large stents like valves, during the process of product implantation, the implant needs to be transported in place and precisely implanted with the cooperation of a delivery system.

[0003] Currently, large stent-type vascular implant products, according to their shape recovery mechanisms, are mainly divided into externally expanded type (mainly balloon-expanded, hereinafter referred to as balloon-expandable type) and self-expandable type (hereinafter referred to as self-expandable type).

[0004] During the release process of the self-expandable valve, its shape recovery gradually occurs with the change of the release degree. This inevitably leads to an instantaneous separation action at the connection point when the product is opened to the limit and about to be fully deployed, which can be simply understood as "bouncing".

[0005] And this bouncing action is likely to cause the valve to shift and bring problems such as physical damage to the patient. Summary of the Invention

[0006] This application provides a valve delivery device and a valve delivery method, which can solve the problem that the valve is prone to displacement during instantaneous release.

[0007] In a first aspect, this application provides a valve delivery device, which includes:

[0008] A first catheter;

[0009] A second catheter, which is sleeved inside the first catheter;

[0010] A first flexible member, which includes a first end and a second end. The first end is used to connect with the valve, and by operating the second end, the tension state of the first flexible member can be controlled;

[0011] A fixing component, which is arranged at the distal end of the second catheter along the valve delivery device. The fixing component fixes the valve to the distal end of the second catheter by pressing the first end. The first catheter can move relative to the second catheter to accommodate the valve inside the first catheter or release the valve outside the first catheter;

[0012] During the operation of the valve delivery device, the fixing assembly can be in a first state and a second state. In the first state, the fixing assembly can press the first end tightly to restrict the separation of the valve from the valve delivery device; in the second state, the fixing assembly can release the pressing of the first end to enable the valve to automatically separate from the valve delivery device.

[0013] In a possible design, the fixing assembly includes a fixing member and a pressing member. The fixing member is connected to the second catheter, and the pressing member can cooperate with or disengage from the fixing member to press or release the pressing of the first end.

[0014] In a possible design, the fixing member is provided with a limiting portion, and the pressing member is provided with a limiting cooperation portion. The first end is located between the limiting portion and the limiting cooperation portion, and the limiting portion and the limiting cooperation portion cooperate or disengage to press or release the pressing of the first end.

[0015] In a possible design, the limiting portion is provided with a limiting groove or a limiting hole, and the first end passes through the limiting groove or the limiting hole and is bent so that the limiting cooperation portion can press the first end when it cooperates with the limiting portion.

[0016] In a possible design, the valve delivery device further includes a transmission assembly and a second flexible member. The pressing member is connected to the first catheter through the second flexible member. The transmission assembly can drive the first catheter to move along the axial direction of the first catheter so that the valve is received inside the first catheter or the valve is released outside the first catheter; when the transmission assembly drives the first catheter to move along the axial direction of the first catheter, the second flexible member can be relaxed or tightened so that the pressing member cooperates with or disengages from the fixing member.

[0017] In a possible design, the pressing member further includes a first traction hole, and the second flexible member passes through the first traction hole and is connected to the first catheter.

[0018] In a possible design, the transmission assembly includes a transmission mechanism and a moving member. The moving member is connected to the transmission mechanism, the first catheter is connected to the transmission mechanism, and when the moving member moves, it can make the transmission mechanism move and drive the first catheter to move along the axial direction of the first catheter.

[0019] In a possible design, the transmission mechanism includes a transmission member and a first rotating shaft. The transmission member is located inside the first rotating shaft. The moving member is sleeved on the first rotating shaft and rotates around the first rotating shaft. The moving member is connected to the transmission member, and the first catheter is connected to the transmission member.

[0020] In a possible design, the valve delivery device includes a limiting member. When the limiting member is in a limiting state, the limiting member can limit the rotation of the moving member, thereby restricting the first catheter and the second flexible member from driving the pressing member to disengage from the fixing member, and further restricting the valve from detaching from the valve delivery device; when the limiting member is in a non-limiting state, the limitation on the moving member can be released, enabling the moving member to rotate, and driving the pressing member to disengage from the fixing member through the first catheter and the second flexible member, so that the valve automatically detaches from the valve delivery device.

[0021] In a possible design, the valve delivery device includes an avoidance portion, and the transmission member is provided with a limiting and mating member. When the limiting member extends out of the avoidance portion, the limiting and mating member can cooperate with the limiting member to make the transmission member abut against the limiting member, so as to limit the rotation of the moving member; when the limiting member is pressed back into the avoidance portion, the limiting member and the limiting and mating member can be disengaged to enable the moving member to rotate.

[0022] In a possible design, the valve delivery device further includes an adjustment assembly, and the adjustment assembly is used to adjust the length of the first flexible member between the fixing assembly and the adjustment assembly to adjust the tension state of the first flexible member.

[0023] In a possible design, the adjustment assembly includes a second rotating shaft and a knob. The knob is sleeved on the second rotating shaft, and the second end is wound around the second rotating shaft. When the knob rotates, it can drive the second rotating shaft to rotate, so that the number of winding turns of the first flexible member on the second rotating shaft increases or decreases.

[0024] In a possible design, the adjustment assembly further includes a knob fixing member, and the knob fixing member cooperates with the knob in a direction perpendicular to the second rotating shaft.

[0025] In a possible design, the valve delivery device further includes a third catheter, and the third catheter is sleeved inside the second catheter. The third catheter is used to accommodate a guide wire.

[0026] In a second aspect, the present application provides a valve delivery method, and the valve delivery method is a delivery method using the above-mentioned valve delivery device. The valve delivery method includes:

[0027] S1: Connect the valve to the first end of the first flexible member, move the first catheter towards the distal end of the valve delivery device by operating the transmission assembly, and receive the valve into the first catheter;

[0028] S2: The guide wire reaches the implantation position, and the valve delivery device reaches the implantation position along the guiding direction of the guide wire;

[0029] S3: Tighten the first flexible member by adjusting the adjustment assembly;

[0030] S4: Operate the transmission assembly to move the first catheter proximally towards the valve delivery device, so that the valve gradually disengages from the first catheter until the valve is completely exposed from the first catheter;

[0031] S5: After the valve is completely exposed, if it is finally confirmed that the position and working state of the valve meet the requirements, the first flexible member can be gradually relaxed by rotating the adjustment assembly, thereby gradually relaxing the valve. Until the valve completely returns to its free form, continue to drive the first catheter proximally towards the valve delivery device by operating the transmission assembly. The first catheter drives the pressing member to disengage from the fixing member, so that the valve automatically detaches from the valve delivery device.

[0032] Further, in step S5, the limiting member can limit the movement of the moving member proximally towards the valve delivery device at the preset position, thereby restricting the moving member from driving the pressing member to disengage from the fixing member through the first catheter and the second flexible member, so as to restrict the detachment of the valve from the valve delivery device; after the limit is released at the preset position, the moving member can move proximally towards the valve delivery device and drive the pressing member to disengage from the fixing member through the first catheter and the second flexible member, so that the valve automatically detaches from the valve delivery device.

[0033] The beneficial effect of the present application is that when the valve is loaded into the valve delivery device, a first flexible member is prefabricated as the morphological restriction for the final release of the valve. By gradually adjusting the opening state of the valve before the final release of the valve, a stable release of the valve is formed, avoiding the occurrence of "bouncing".

[0034] The first end of the first flexible member is connected to the valve. By operating the second end, the operator can change the length of the first flexible member located within the second catheter, thereby changing the tension state of the first flexible member. Before the valve enters the implantation position, the valve is connected to the valve delivery device through the first end, and the first end is pressed tightly by the fixing assembly. At this time, the valve is fixed at the end of the second catheter, and the first catheter is sleeved outside the second catheter, accommodating the valve in the first catheter, thereby reducing the volume during the valve delivery process and facilitating the delivery of the valve. After the delivery device reaches the implantation position, moving the valve delivery device proximally through the first catheter can gradually disengage the valve from the first catheter. During the process of the valve gradually disengaging from the first catheter, the first flexible member is always in a tensioned state. The tension force of the first flexible member can constrain the release process of the valve after it disengages from the first catheter, enabling a stable shape recovery process when the valve disengages, thereby restricting the "bouncing" behavior when the valve disengages from the fixing assembly, avoiding displacement of the valve during the deployment process, and facilitating further confirmation of its position and shape. After confirming that the shape and position are correct, the restriction of the fixing assembly on the valve is released, enabling the valve to automatically disengage from the valve delivery device and be released. Through the cooperation of the fixing assembly and the first flexible member, it is possible to prevent the valve from being directly released after disengaging from the first catheter, resulting in "bouncing" behavior, causing the valve to shift, and bringing physiological damage to the patient and other problems.

[0035] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the valve delivery device provided by the present application in a specific embodiment;

[0037] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the valve delivery device in

[0038] Figure 3 is Figure 1 a schematic structural diagram of the valve delivery device in

[0039] Figure 4 is Figure 1 a schematic structural diagram of the valve delivery device in

[0040] Figure 5 is Figure 4 a schematic structural diagram of the fixing assembly in

[0041] Figure 6 is Figure 1 a sectional view of the valve delivery device in

[0042] Figure 7 is Figure 6 a partial enlarged schematic view of part A in

[0043] Figure 8 is Figure 6 a partial enlarged schematic view of part B in

[0044] Figure 9 is Figure 6 a partial enlarged schematic view of part C in

[0045] Figure 10 is Figure 6 a partial enlarged schematic view of part D in

[0046] Reference numerals:

[0047] 1 - First catheter;

[0048] 2 - Second catheter;

[0049] 21 - Second through hole;

[0050] 22 - Seal;

[0051] 3 - Third catheter;

[0052] 4 - Fixing assembly;

[0053] 41 - Fixing part;

[0054] 411 - Limiting part;

[0055] 411a - Limiting groove;

[0056] 412 - Second traction hole;

[0057] 413 - Fixing part;

[0058] 414 - First groove;

[0059] 415 - First flexible part;

[0060] 415a - First end;

[0061] 415b - Second end;

[0062] 42 - Pressing part;

[0063] 421 - Limiting and mating part;

[0064] 422 - First traction hole;

[0065] 423 - Second groove;

[0066] 5 - Transmission assembly;

[0067] 51 - Moving part;

[0068] 52 - First rotating shaft;

[0069] 521 - First through hole;

[0070] 53 - Transmission part;

[0071] 531 - Limit fitting part;

[0072] 531a - Clamping fitting part;

[0073] 6 - Adjustment assembly;

[0074] 61 - Knob;

[0075] 62 - Second rotating shaft;

[0076] 63 - Knob fixing part;

[0077] 64 - Pressing cover;

[0078] 7 - Limiting part;

[0079] 71 - Clamping part;

[0080] 8 - Proximal housing;

[0081] 81 - Liquid injection port;

[0082] 82 - Avoidance part;

[0083] 9 - Handle.

[0084] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with this application, and are used together with the specification to explain the principles of this application. Detailed implementation manners

[0085] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0086] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0087] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms of "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0088] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0089] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described from the perspective shown in the drawings and should not be construed as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component.

[0090] In the prior art, during the valve release process, when it is opened to the limit state, there will be an instantaneous separation action at the connection point when the valve is separated from the delivery device, which can be simply understood as "bouncing". And this "bouncing" action is likely to cause the valve to shift and cause unnecessary physical damage to the patient. To solve this problem, the present application provides a valve delivery device. To more clearly describe the valve delivery device of the present application, the proximal end of the valve delivery device is defined as the end closer to the operator during the operation process, and the distal end of the valve delivery device is defined as the end farther from the operator during the operation process. The valve delivery device of the present application will be elaborated in detail below with specific embodiments.

[0091] As Figure 1-4 shown, and specifically referring to Figure 4 , the valve delivery device includes: a first catheter 1, a second catheter 2, a first flexible member 415, and a fixing assembly 4. The second catheter 2 is sleeved inside the first catheter 1. The first flexible member 415 includes a first end 415a and a second end 415b. The first end 415a is used to connect with the valve, and the tension state of the first flexible member 415 can be controlled by operating the second end 415b. The fixing assembly 4 is arranged at the end of the second catheter 2 along the distal end of the valve delivery device. The fixing assembly 4 fixes the valve to the end of the second catheter 2 by pressing the first end 415a. The first catheter 1 can move relative to the second catheter 2 to accommodate the valve inside the first catheter 1 or release the valve outside the first catheter 1. Among them, during the working process of the valve delivery device, the fixing assembly 4 can be in a first state and a second state. In the first state, the fixing assembly 4 can press the first end 415a to limit the separation of the valve from the valve delivery device. In the second state, the fixing assembly 4 can release the pressing of the first end 415a to enable the valve to automatically separate from the valve delivery device.

[0092] In this embodiment, the valve and the valve delivery device are connected by a first flexible member 415, which can be a flexible traction wire or a traction filament. Compared with a rigid member, the first flexible member 415 is more easily deformed at will, has better adaptability during the release process, and can reduce the risk of damage to the implantation position. The first flexible member 415 has less impact on the overall structure of the valve delivery device, does not increase the size of the valve delivery device, and can reduce the risk of lesions at the implantation position.

[0093] Please refer to Figure 6 , the first end 415a of the first flexible member 415 is connected to the valve. The operator can change the length of the first flexible member 415 located in the second catheter 2 by operating the second end 415b, thereby changing the tension state of the first flexible member 415. Please refer to Figure 10 , before the valve enters the implantation position, the valve is connected to the valve delivery device through the first end 415a, and the first end 415a is pressed tightly by the fixing component 4. At this time, the valve is fixed at the end of the second catheter 2, and the first catheter 1 is sleeved outside the second catheter 2 to accommodate the valve in the first catheter 1, thereby reducing the volume during the valve delivery process and facilitating the delivery of the valve. Please refer to Figure 9 , after the delivery device reaches the implantation position, moving the valve delivery device proximally through the first catheter 1 can cause the valve to gradually disengage from the first catheter 1. During the process of the valve gradually disengaging from the first catheter 1, the first flexible member 415 is always in a tension state. The tension force of the first flexible member 415 can impose constraints on the unfolding process of the valve. When it is finally confirmed that the position and working state of the valve meet the requirements, the second end 415b can be operated to gradually relax the first flexible member 415, thereby gradually reducing the binding force on the valve and enabling the valve to fully unfold into the final required shape. Therefore, the first flexible member 415 can achieve morphological limitation when the valve disengages from the first catheter 1 and finally unfolds, forming a stable unfolding of the valve, avoiding the behavior of "bouncing", thereby preventing the valve from shifting during the unfolding process, and facilitating further confirmation of its position and shape. After confirming that the shape and position are correct, the restriction of the fixing component 4 on the valve is released, enabling the valve to automatically disengage from the valve delivery device and be released. Through the cooperation of the fixing component 4 and the first flexible member 415, it is possible to prevent the valve from being directly released after disengaging from the first catheter 1, resulting in "bouncing" behavior, causing the valve to shift, and bringing physiological damage to the patient and other problems.

[0094] The fixing component 4 is provided at the end of the second catheter 2 along the valve delivery device, such that except for the part of the valve connected to the fixing component 4, the rest of the valve is located at the distal end of the second catheter 2. The diameter after accommodation can be smaller than the diameter of the second catheter 2. Therefore, the volume of the valve after accommodation can be further reduced, thereby reducing the diameter of the first catheter 1 and facilitating the entry of the valve delivery device into the human body.

[0095] It should be noted that the valve can be a self-expanding valve, and the self-expanding valve can be made of a shape memory material, such as a shape memory metal alloy (e.g., nitinol), and can automatically expand into the required shape at a specific temperature.

[0096] Specifically, as Figure 3-5 , and please refer in detail to Figure 5 , the fixing assembly 4 includes a fixing member 41 and a pressing member 42. The fixing member 41 is connected to the second catheter 2, and the pressing member 42 can cooperate or disengage with the fixing member 41 to press or release the pressing of the first end 415a.

[0097] In this embodiment, the fixing member 41 is installed on the second catheter 2 and is the fixed end. The pressing member 42 can cooperate or not cooperate with the fixing member 41, so that the first end 415a is in a pressed state or a free state. When the first end 415a is pressed, it can limit the separation of the valve from the valve delivery device, thereby avoiding the phenomenon of displacement during the valve release process; when the first end 415a is in a free state, the valve can automatically separate from the valve delivery device, and at this time the valve has been fully expanded, which can reduce the probability of "bouncing", thereby reducing the risk of valve displacement.

[0098] More specifically, continue to refer to Figure 5 , the fixing member 41 is provided with a limiting portion 411, the pressing member 42 is provided with a limiting and cooperating portion 421, the first end 415a is located between the limiting portion 411 and the limiting and cooperating portion 421, and the limiting portion 411 and the limiting and cooperating portion 421 cooperate or disengage to press or release the pressing of the first end 415a.

[0099] In this embodiment, the first end 415a is located between the limiting portion 411 and the limiting and cooperating portion 421, so that when the limiting portion 411 and the limiting and cooperating portion 421 cooperate, the first end 415a can be pressed, and when the limiting portion 411 and the limiting and cooperating portion 421 do not cooperate, the first end 415a can be in a free state.

[0100] Wherein, one of the limiting portion 411 and the limiting and cooperating portion 421 can be a recessed portion, and the other can be a protruding portion that cooperates with the recessed portion. As shown in the figure, the fixing member 41 is provided with a recessed portion, and the pressing member 42 is provided with a protruding portion. The cooperation of the recessed portion and the protruding portion makes the first end 415a be pressed. As shown in the figure, the fixing member 41 is provided with a plurality of first grooves 414, and the pressing member 42 is provided with a plurality of second grooves 423 corresponding to the first grooves 414. The first grooves 414 are spaced apart from the limiting portion 411, and the second grooves 423 are spaced apart from the limiting and cooperating portion 421. These grooves can be used for exhausting air to reduce the gas content in the inner cavity of the valve delivery device.

[0101] In order to increase the fixing effect of the fixing component 4 on the valve, multiple first flexible members 415 can be provided to connect with the valve. At the same time, the fixing component 41 is provided with multiple limiting portions 411, and the pressing component 42 is provided with multiple limiting matching portions 421. The multiple first flexible members 415 correspond to the multiple limiting portions 411 one by one. The multiple limiting portions 411 enable the valve to be fixed in the forward direction when fixed to the fixing component 41, that is, the connection position of the valve and the pressing position of the fixing component 4 are in the same straight line, reducing the possibility of torsion and preventing the possibility of torsional force causing deformation of the valve. For example, as shown in the figure, the fixing component 41 is provided with two limiting portions 411, so that the two first flexible members 415 are respectively connected to the valve and are pressed by the concave portion and the convex portion to fix the valve and prevent the valve from shifting during the expansion process.

[0102] More specifically, continue to refer to Figure 5 The limiting portion 411 is provided with a limiting groove 411a or a limiting hole, and the first end 415a passes through the limiting groove 411a or the limiting hole and is bent so that the limiting matching portion 421 can press the first end 415a when it cooperates with the limiting portion 411.

[0103] In this embodiment, the first end 415a passes through the limiting groove 411a or the limiting hole and is bent. The limiting groove 411a and the limiting hole can play a certain winding role on the first flexible part 415, thereby increasing the fixing effect of the fixing part 41 and the clamping part 42 on the first flexible part 415, and preventing the first flexible part 415 from detaching from between the clamping part 42 and the fixing part 41.

[0104] It should be noted that, Figure 5 As shown, the fixing member 41 has a fixing portion 413, which is used to accommodate a portion of the valve. The portion of the valve installed in the fixing portion 413 has a connecting hole. The first end 415a of the first flexible member 415 passes through the connecting hole and then enters and passes through the limiting groove 411a along the edge of the limiting portion 411. The pressing member 42 cooperates with the fixing member 41 to compress the first end 415a. The fixing portions 413 and the limiting portions 411 are provided correspondingly and are equal in number.

[0105] In the above embodiments, Figure 6 、 Figure 7 As shown, the valve delivery device also includes a transmission component 5 and a second flexible member (not shown in the figure), and the clamping member 42 is connected to the first catheter 1 through the second flexible member. The transmission component 5 can drive the first catheter 1 to move along the axial direction of the first catheter 1 so that the valve is accommodated inside the first catheter 1 or the valve is released outside the first catheter 1, and when the transmission component 5 drives the first catheter 1 to move along the axial direction of the first catheter 1, the second flexible member can be relaxed or tightened to make the clamping member 42 cooperate or release with the fixing member 41.

[0106] In this embodiment, one end of the second flexible member is connected to the pressing member 42, and the other end is connected to the first catheter 1. During the process that the transmission assembly 5 drives the first catheter 1 to move towards the proximal end of the valve delivery device, the second flexible member connected to the first catheter 1 can be gradually tightened, and finally drive the pressing member 42 to move, so that the pressing member 42 can be disengaged from the fixing member 41. After the pressing member 42 is disengaged from the fixing member 41, the first end 415a of the first flexible member 415 is in a free state. Therefore, the valve is no longer restricted by the first flexible member 415 and can be automatically disengaged from the valve delivery device. During the process that the transmission assembly 5 drives the first catheter 1 to move towards the distal end of the valve delivery device, the first catheter 1 can receive the valve in its internal cavity. At this time, the second flexible member is in a gradually relaxed state. Therefore, the fixing member 41 and the pressing member 42 are always in a matching state and can prevent the valve from being disengaged from the valve delivery device. By providing the transmission assembly 5 and the second flexible member, the unfolding process of the valve can be controlled at the proximal end of the valve delivery device, and the valve can be automatically disengaged from the valve delivery device. Moreover, the disengagement process and the unfolding process can share the same transmission assembly 5 to achieve, further simplifying the structure of the valve delivery device and reducing the cost.

[0107] Specifically, as Figure 5 shown, the pressing member 42 further includes a first traction hole 422, and the second flexible member passes through the first traction hole 422 and is connected to the first catheter 1.

[0108] In this embodiment, the first traction hole 422 facilitates the second flexible member to pass through and realizes the connection between the pressing member 42 and the first catheter 1, having the advantage of simple structure.

[0109] Among them, as Figure 5 shown, the fixing member 41 can be provided with a second traction hole 412, and a third flexible member (not shown in the figure) passes through the second traction hole 412 of the fixing member 41 and the first traction hole 422 of the pressing member 42 to connect the fixing member 41 and the pressing member 42. After the pressing member 42 is disengaged from the fixing member 41, the third flexible member can restrain the pressing member 42 to prevent the pressing member 42 from swinging freely and causing damage to the lesion site.

[0110] It should be noted that the first flexible member 415, the second flexible member and the third flexible member can be made of the same material.

[0111] Specifically, as Figure 7 shown, the transmission assembly 5 includes a transmission mechanism and a moving member 51. The moving member 51 is connected to the transmission mechanism, and the first catheter 1 is connected to the transmission mechanism. When the moving member 51 moves, it can make the transmission mechanism move and drive the first catheter 1 to move along the axial direction of the first catheter 1.

[0112] The moving member 51 is connected to the transmission mechanism, facilitating the transfer of the movement of the moving member 51 to the transmission mechanism, and driving the first catheter 1 to move axially through the transmission mechanism. The cooperation between the moving member 51 and the transmission mechanism enables the operator to operate the moving member 51 at the proximal end of the valve delivery device and control the movement of the first catheter 1 located at the distal end through the moving member 51. The structure is simple and easy to operate.

[0113] As a specific implementation, as Figure 7 shown, the transmission mechanism includes a transmission member 53 and a first rotating shaft 52. The transmission member 53 is located inside the first rotating shaft 52. The moving member 51 is sleeved on the first rotating shaft 52. The moving member 51 is connected to the transmission member 53, and the first catheter 1 is connected to the transmission member 53. The moving member 51 can rotate around the first rotating shaft 52 and drive the transmission member 53 and the first catheter 1 to move along the axial direction of the first catheter 1.

[0114] It can be understood that the transmission member 53 is located inside the first rotating shaft 52. The first rotating shaft 52 is provided with a first through hole 521 extending axially. The moving member 51 and the transmission member 53 are connected through the first through hole 521. To increase the connection stability between the moving member 51 and the transmission member 53, the first rotating shaft 52 can be symmetrically provided with two first through holes 521. The moving member 51 and the transmission member 53 are connected through the two through holes. The moving member 51 can rotate relative to the transmission member 53 around the first rotating shaft 52 and can also move axially along the first through hole 521 while rotating around the first rotating shaft 52. When moving axially, it drives the transmission member 53 to translate inside the first through hole 521. Since the first catheter 1 is connected to the transmission member 53, in a specific implementation, the first catheter 1 and the transmission member 53 can be in abutment. The abutment between the first catheter 1 and the transmission member 53 can further simplify the structure of the valve delivery device. When the transmission member 53 moves axially, it can drive the first catheter 1 to move synchronously. When the first catheter 1 moves towards the distal end of the valve delivery device, the valve can be received inside the first catheter 1. When the first catheter 1 moves towards the proximal end of the valve delivery device, the valve can be released from the first catheter 1. By providing the first rotating shaft 52 and the transmission member 53, the rotation of the moving member 51 can be converted into the translation of the transmission member 53. And when the distance is short, it is relatively easy to control the forward displacement of the transmission member 53 by controlling the rotation speed.

[0115] As a specific implementation, as Figure 7As shown, a threaded fit may be provided between the moving member 51 and the first rotating shaft 52. The moving member 51 and the first rotating shaft 52 form an engagement relationship through the threaded fit. When the moving member 51 is rotated, since the first rotating shaft 52 does not move axially, the movement can convert its own rotation into axial movement along the first rotating shaft 52 through its engagement with the transmission shaft, thereby driving the transmission member 53 to move axially. The transmission member 53 drives the first catheter 1 to move axially, realizing the receiving and releasing of the valve. The threaded fit between the moving member 51 and the first rotating shaft 52 can increase the resistance of the moving member 51 during rotation, preventing accidental contact from causing axial movement of the moving member 51 and affecting the position of the valve delivery device.

[0116] As another specific implementation, the transmission mechanism may include a shaft (not shown in the figure) and a transmission member 53 (not shown in the figure). The moving member 51 is connected to the transmission member 53 through the shaft. The moving member 51 moves axially along the shaft, and the transmission member 53 can move synchronously with the moving member 51. The transmission member 53 is connected to the second catheter 2, so it can drive the second catheter 2 to move proximally or distally of the valve delivery device, thereby realizing the receiving and releasing of the valve. It should be noted that the moving member 51 and the transmission member 53 may be an integral structure. A groove for the movement of the moving member 51 and the transmission member 53 is provided on the shaft. The moving member 51 is located outside the shaft for convenient user operation, and the transmission member 53 is located inside the shaft for convenient connection with the second catheter 2. To further simplify the structure, the transmission member 53 and the second catheter 2 may be in abutment.

[0117] In one embodiment, as Figure 6 , Figure 8 , Figure 9 shown, the valve delivery device includes a limiting member 7. When the limiting member 7 is in the limiting state, the limiting member 7 can limit the rotation of the moving member 51, thereby restricting the first catheter 1 and the second flexible member from driving the pressing member 42 to release the cooperation with the fixing member 41, and further restricting the valve from detaching from the valve delivery device; when the limiting member 7 is in the non-limiting state, it can release the limitation on the moving member 51, enabling the moving member 51 to rotate, and driving the pressing member 42 to release the cooperation with the fixing member 41 through the first catheter 1 and the second flexible member, so that the valve is completely released.

[0118] In the limiting state, the limiting member 7 can limit the rotation of the moving member 51 and limit the first catheter 1 from approaching the proximal end further, thereby restricting the first catheter 1 and the second flexible member from driving the pressing member 42 to disengage from the fixing member 41, and further restricting the valve from detaching from the valve delivery device. In the non-limiting state, after the limiting member 7 releases the limit on the moving member 51, the first catheter 1 can continue to approach the proximal end, and drive the pressing member 42 to disengage from the fixing member 41 through the first catheter 1 and the second flexible member, so that the valve automatically detaches from the valve delivery device, enabling the valve to reach the desired implantation position. The limiting member 7 can be disposed at any position between when the pressing member 42 and the fixing member 41 have not yet disengaged to just disengaging. Of course, this position should be as close as possible to the position where the pressing member 42 and the fixing member 41 just disengage, so that the valve can be completely exposed from the first catheter 1 before automatically detaching from the valve delivery device, with the maximum degree of deployment. And because the fixing member 41 and the pressing member 42 are not disengaged, the valve will not detach from the valve delivery device. At the same time, since the first flexible member 415 is still in a tensioned state, when the fixing member 41 and the pressing member 42 are disengaged, the second end 415b of the first flexible member 415 is in a free state and slowly disengages from the valve connection part. The tension force of the first flexible member 415 plays a constraining role in the process of the valve detaching from the fixing assembly 4, thereby preventing the valve from "bouncing" or shifting during the process of detaching from the fixing assembly 4.

[0119] As a specific implementation manner, the limiting member 7 can be a limit pin structure. The first rotating shaft 52 has a mounting hole (not shown in the figure). The limiting member 7 is connected to the bottom wall of the mounting hole through an elastic member. In the limiting state, the limiting member 7 protrudes from the surface of the first rotating shaft 52. When the moving member 51 moves to a state of abutting against the limiting member 7, it can be limited by the limiting member 7. By pressing, the limiting member 7 is pressed into the mounting hole to make it in the non-limiting state, releasing the limit on the moving member 51. The moving member 51 can continue to rotate and drive the pressing member 42 to disengage from the fixing member 41, so that the first end 415a of the first flexible member 415 is in a free state, and the valve can automatically detach from the valve delivery device.

[0120] As another specific implementation manner, as Figure 8 、 Figure 9 shown, the delivery device includes an avoidance portion 82. The transmission member 53 is provided with a limit cooperation member 531. When the limiting member 7 extends out of the avoidance portion 82, the limiting member 7 can cooperate with the limit cooperation member 531 so that the transmission member 53 abuts against the limiting member 7, thereby restricting the rotation of the moving member 51; when the limiting member 7 is pressed back into the avoidance portion 82, the limiting member 7 can disengage from the limit cooperation member 531, enabling the moving member 51 to rotate.

[0121] It should be noted that as Figure 8As shown, the valve delivery device includes a proximal housing 8. The proximal housing 8 has a lumen that communicates internally with the first rotating shaft 52. The limiting member 7 is provided on the proximal housing 8 and passes through the proximal housing 8. A part of it is located inside the proximal housing 8, and a part extends out of the proximal housing 8. The proximal housing 8 is further provided with an avoidance portion 82. The limiting member 7 and the bottom wall forming the avoidance portion 82 can be connected by an elastic member (not shown in the figure) or other flexible components (not shown in the figure) such as silica gel, rubber, etc., so that the limiting member 7 is in a state of extending out of the avoidance portion 82 in its natural state. The limiting and cooperating member 531 is provided on the transmission member 53 and can cooperate with the limiting member 7 along the axial direction of the first catheter 1 before the moving member 51 moves to the proximal end of the rotating shaft 52, restricting the continuous movement of the transmission member 53, thereby restricting the rotation of the moving member 51, playing a role in restricting the first catheter 1 from approaching the proximal end. Therefore, the pressing member 42 connected to the first catheter 1 and the fixing member 41 will not separate, and the first end 415a of the valve that binds the valve is in a pressed state, and the valve will not separate from the valve delivery device. Pressing the limiting member 7 extending out of the proximal housing 8 enables the limiting member 7 to be pressed back into the avoidance portion 82, so that the limiting and cooperating member 531 is disengaged from the limiting member 7, and the moving member 51 can continue to rotate, thereby driving the first catheter 1 to continue moving proximally. Therefore, the pressing member 42 connected to the first catheter 1 and the fixing member 41 can be separated, and the first end 415a of the first flexible member 415 is in a free state. Therefore, the valve can be separated from the valve delivery device and released. The limiting member 7 and the limiting and cooperating member 531 can limit the moving member 51 before the pressing member 42 and the fixing member 41 are separated, which can prevent the valve from automatically separating from the valve delivery device due to accidental touch.

[0122] Among them, as Figure 9 shown, the limiting member 7 and the limiting and cooperating member 531 can be in a snap-fit. That is, one is provided with a snap portion 71, and the other is provided with a snap-fitting portion 531a. The snap portion 71 and the snap-fitting portion 531a are in inclined surface cooperation, which is convenient for pressing the limiting member 7 to release the cooperation with the limiting and cooperating member 531. The structure is simple and easy to operate.

[0123] In one embodiment, as Figure 1-4 shown, the valve delivery device further includes a handle 9. One end of the handle 9 is connected to the first catheter 1, and the other end of the handle 9 is connected to the first rotating shaft 52. At least part of the handle 9 has a dimension along the radial direction of the first catheter 1 that is larger than the dimension of the first rotating shaft 52.

[0124] In this embodiment, the handle 9 is used to hold the valve delivery device and perform operations such as moving it. The handle 9 is located at the distal end of the first rotating shaft 52, enabling the handle 9 to approach the middle position of the valve delivery device. Therefore, when the handle 9 is held, it is easier for both ends of the handle 9 to be balanced in force, facilitating the movement of the valve delivery device. The dimension of the handle 9 in the radial direction of the first catheter 1 is larger than that of the first rotating shaft 52. When the distal end of the moving member 51 abuts against the handle 9, it can limit the further movement of the moving member 51 towards the distal end. Therefore, the handle 9 can also limit the range of the moving member 51 to remind the operator not to exceed the measurement range.

[0125] In one embodiment, as Figure 1-4 shown in the figure, Figure 8 the valve delivery device further includes an adjustment assembly 6. The second end 415b is connected to the adjustment assembly 6, and the adjustment assembly 6 is used to adjust the length of the first flexible member 415 between the fixed assembly 4 and the adjustment assembly 6 to adjust the tension state of the first flexible member 415.

[0126] It should be noted that the first end 415a of the first flexible member 415 is connected to the fixed assembly 4, and the second end 415b of the first flexible member 415 is connected to the adjustment assembly 6. By operating the second end 415b through the adjustment assembly 6, the length of the first flexible member 415 between the fixed assembly 4 and the adjustment assembly 6 can be adjusted. When the length of the first flexible member 415 shortens, the tension degree of the first flexible member 415 increases; when the length of the first flexible member 415 increases, the tension degree of the first flexible member 415 decreases. Before the valve is separated from the first catheter 1, the first flexible member 415 is in a tension state. The tension force of the first flexible member 415 constrains the process of the valve unfolding after being separated from the first catheter 1, enabling the valve to gradually unfold while the tension degree of the first flexible member 415 gradually decreases, thereby avoiding the "bouncing" behavior when the valve is separated from the first catheter 1 instantaneously. Moreover, this process is achieved through the adjustment assembly 6, which is more convenient for the operator to operate.

[0127] As a specific implementation manner, as Figure 8 shown, the adjustment assembly 6 includes a second rotating shaft 62 and a knob 61. The knob 61 is sleeved on the second rotating shaft 62, and the second end 415b is wound around the second rotating shaft 62. When the knob 61 rotates, it can drive the second rotating shaft 62 to rotate, so that the number of winding turns of the first flexible member 415 on the second rotating shaft 62 increases or decreases, thereby shortening or lengthening the length of the first flexible member 415 between the fixed assembly 4 and the adjustment assembly 6.

[0128] It should be noted that the adjustment component 6 is arranged on the proximal outer shell 8, and the knob 61 at least partially protrudes from the proximal outer shell 8, facilitating operation by the operator. The second end 415b of the first flexible member 415 is wound around the second rotating shaft 62. When the knob 61 rotates in the first direction, the number of winding turns of the first flexible member 415 on the second rotating shaft 62 increases, shortening the length of the first flexible member 415 between the fixing component 4 and the adjustment component 6, thereby increasing the tension of the first flexible member 415. When the knob 61 rotates in the second direction, the number of winding turns of the first flexible member 415 on the second rotating shaft 62 decreases, increasing the length of the first flexible member 415 between the fixing component 4 and the adjustment component 6, thereby reducing the tension of the first flexible member 415. By fixing the second end 415b to the second rotating shaft 62, it is convenient to increase or decrease the length of the first flexible member 415 by winding, which is convenient for operation. Moreover, after the first flexible member 415 is wound around the first rotating shaft 52, it will not cause too much change in the size of the adjustment component 6.

[0129] Wherein, a gland 64 is further arranged above the knob 61, and the gland 64 presses the knob 61, so that the knob 61 and the second rotating shaft 62 can rotate synchronously.

[0130] More specifically, as Figure 8 shown, the adjustment component 6 further includes a knob fixing member 63. The knob fixing member 63 cooperates with the knob 61 in a direction perpendicular to the second rotating shaft 62 to limit the rotation of the knob 61; the knob fixing member 63 and the knob 61 can be disengaged to enable the knob 61 to be rotated.

[0131] It can be understood that when the knob 61 does not need to be rotated, the knob 61 can be made to abut against the knob fixing member 63 in a direction perpendicular to the second rotating shaft 62. On the one hand, it plays a role in preventing misoperation by the operator, and on the other hand, it plays a role in preventing the knob 61 from automatically rotating in the reverse direction. To enhance the limiting effect on the knob 61, the outer surface of the knob 61 can be provided with threads, and the knob fixing member 63 cooperates with the threads to limit the rotation of the knob 61. When the knob 61 needs to be rotated, the knob fixing member 63 is moved away from the knob 61, so that the knob fixing member 63 no longer abuts against the knob 61, enabling the operator to change the number of winding turns of the first flexible member 415 on the second rotating shaft 62 by rotating the knob 61. The setting of the knob fixing member 63 can further reduce the risk of misoperation by the operator, so as to avoid unnecessary losses to the patient.

[0132] In each of the above embodiments, as Figure 1-4 shown, the valve delivery device further includes a third catheter 3. The third catheter 3 is sleeved inside the second catheter 2, and the third catheter 3 is used to accommodate a guide wire (not shown in the figure).

[0133] The third catheter 3 is disposed within the second catheter 2. The third catheter 3 is used to accommodate a guide wire. During the use of the valve delivery device, the guide wire will first reach the implantation position, and the first catheter 1, the second catheter 2, and the third catheter 3 will advance along the guide wire to deliver the valve to the desired implantation position.

[0134] To improve the sealing performance inside the valve delivery device, as Figure 3 shown, a seal 22 is further provided between the first catheter 1 and the second catheter 2. Among them, the seal 22 can be a silicone pad or a rubber pad. The second catheter 2 is provided with a second through hole 21 for the first flexible member 415 to pass through. There are two second through holes 21 for two first flexible members 415 to pass through respectively. The first flexible member 415 can enter between the third catheter 3 and the second catheter 2 through the second through hole 21, and after the first end 415a of the first flexible member 415 is connected to the valve, it is fixed to the fixing assembly 4. Except for the part connected to the first end 415a, the rest of the valve is wrapped outside the third catheter 3 to further reduce the volume of the valve after being received. In addition, the second through hole 21 can also evacuate the gas in the first catheter 1, the second catheter 2, and the third catheter 3 of the valve delivery device. The proximal end housing 8 of the valve delivery device is provided with a liquid injection port 81 for filling the first catheter 1, the second catheter 2, and the third catheter 3 with liquid to ensure that there is no gas in the valve delivery device before entering the human body.

[0135] The embodiment of the present application further provides a valve delivery method. The valve delivery method is a delivery method using the above-mentioned valve delivery device. The valve delivery method includes:

[0136] S1: Connect the valve to the first end 415a of the first flexible member 415, and move the first catheter 1 towards the distal end of the valve delivery device by operating the transmission assembly 5, and receive the valve within the first catheter 1;

[0137] S2: The guide wire reaches the implantation position, and the valve delivery device reaches the implantation position along the guiding direction of the guide wire;

[0138] S3: Tighten the first flexible member 415 by adjusting the adjustment assembly 6;

[0139] S4: Move the first catheter 1 towards the proximal end of the valve delivery device by operating the transmission assembly 5, so that the valve gradually disengages from the first catheter 1 until the valve is completely exposed from the first catheter 1;

[0140] S5: When the valve is completely exposed, if it is finally confirmed that both the position and the working state of the valve meet the requirements, the first flexible member 415 can be gradually relaxed by rotating the adjustment assembly 6, thereby gradually relaxing the valve. Until the valve completely returns to its free form, the first catheter 1 is driven to move proximally to the valve delivery device by operating the transmission assembly 5. The first catheter 1 drives the pressing member 42 to disengage from the fixing member 41, so that the valve automatically detaches from the valve delivery device.

[0141] It should be noted that before the valve delivery device enters the human body, the steps of S1 are carried out, and the valve is completely received in the first catheter 1. Then the guide wire first reaches the desired implantation position, and the first catheter 1, the second catheter 2 and the third catheter 3 will reach the desired implantation position along the guide wire. Using the above valve delivery method to deliver the valve, the process of the valve gradually detaching from the first catheter 1 is also the process of the valve gradually unfolding. Most importantly, before the valve gradually detaches from the first catheter 1, the first flexible member 415 must be adjusted to be in a tensioned state, and after the valve detaches from the first catheter 1, the tension degree of the first flexible member 415 is gradually reduced by the adjustment assembly 6, so that the valve gradually unfolds to the final state. Then continue to operate the transmission assembly 5 to move proximally to the valve delivery device, so that the pressing member 42 disengages from the fixing member 41, and the valve automatically detaches from the valve delivery device. The tension force of the first flexible member 415 can restrict the unfolding process of the valve after it detaches from the first catheter 1, thereby preventing the valve from "bouncing" during the process of the first catheter 1 and preventing the problem of valve displacement due to "bouncing".

[0142] Furthermore, the valve delivery device further includes a limiting member 7, which can limit the detachment of the valve from the valve delivery device. In step S6, the limiting member 7 can limit the proximal movement of the moving member 51 to the valve delivery device, thereby restricting the moving member 51 from driving the pressing member 42 to disengage from the fixing member 41 through the first catheter 1 and the second flexible member, so as to limit the detachment of the valve from the valve delivery device; after the limit is released, the moving member 51 can move proximally to the valve delivery device and drive the pressing member 42 to disengage from the fixing member 41 through the first catheter 1 and the second flexible member, so that the valve automatically detaches from the valve delivery device.

[0143] In order to achieve the above limiting effect, the limiting member needs to be between a certain position before the pressing member 42 and the fixing member 41 disengage and the position where the pressing member 42 and the fixing member 41 just disengage.

[0144] It should be noted that under normal conditions, the limiting member 7 and the limiting cooperation member 531 are both in a cooperative state, which can limit the proximal movement of the moving member 51 towards the valve delivery device. Therefore, when the operator confirms that there is no error and needs to separate the valve from the valve delivery device, the cooperation between the limiting member 7 and the limiting cooperation member 531 can be released by pressing the limiting cooperation member 531, enabling the moving member 51 to move proximally towards the valve delivery device, causing the pressing member 42 to disengage from the fixing member 41. At this time, the first end 415a is in a free state and no longer restricts the valve. Therefore, the valve can automatically separate from the valve delivery device and be in the desired implantation position.

[0145] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A valve delivery device, characterized in that, The valve delivery device includes: A first catheter (1); A second catheter (2) sleeved within the first catheter (1); A first flexible member (415) including a first end (415a) and a second end (415b), where the first end (415a) is for connecting with the valve, and the tension state of the first flexible member (415) can be controlled by operating the second end (415b); A fixing assembly (4) provided at the distal end of the second catheter (2) along the valve delivery device. The fixing assembly (4) fixes the valve to the distal end of the second catheter (2) by pressing the first end (415a). The first catheter (1) can move relative to the second catheter (2) to receive the valve inside the first catheter (1) or release the valve outside the first catheter (1); The valve delivery device further includes an adjustment assembly (6). The second end (415b) is connected to the adjustment assembly (6), and the adjustment assembly (6) is used to adjust the length of the first flexible member (415) between the fixing assembly (4) and the adjustment assembly (6) to adjust the tension state of the first flexible member (415); Wherein, during the operation of the valve delivery device, the fixing assembly can be in a first state and a second state. In the first state, the fixing assembly (4) can press the first end (415a) to prevent the valve from detaching from the valve delivery device; in the second state, the fixing assembly (4) can release the pressing of the first end (415a) to enable the valve to automatically detach from the valve delivery device.

2. The valve delivery device according to claim 1, characterized in that, The fixing assembly (4) includes a fixing member (41) and a pressing member (42). The fixing member (41) is connected to the second catheter (2), and the pressing member (42) can cooperate with or disengage from the fixing member (41) to press or release the pressing of the first end (415a).

3. The valve delivery device according to claim 2, characterized in that, The fixing member (41) is provided with a limiting portion (411), and the pressing member (42) is provided with a limiting cooperation portion (421). The first end (415a) is located between the limiting portion (411) and the limiting cooperation portion (421). The limiting portion (411) and the limiting cooperation portion (421) cooperate or disengage to press or release the pressing of the first end (415a).

4. The valve delivery device according to claim 3, characterized in that, The limiting portion (411) is provided with a limiting groove (411a) or a limiting hole. The first end (415a) passes through and is bent from the limiting groove (411a) or the limiting hole so that the limiting cooperation portion (421) can press the first end (415a) when cooperating with the limiting portion (411).

5. The valve delivery device according to claim 2, characterized in that, The valve delivery device further includes a transmission assembly (5) and a second flexible member. The pressing member (42) is connected to the first catheter (1) through the second flexible member. The transmission assembly (5) can drive the first catheter (1) to move along the axial direction of the first catheter (1) so that the valve is received inside the first catheter (1) or the valve is released outside the first catheter (1). When the transmission assembly (5) drives the first catheter (1) to move along the axial direction of the first catheter (1), the second flexible member can be relaxed or tightened so that the pressing member (42) cooperates with or disengages from the fixing member (41).

6. The valve delivery device according to claim 5, wherein The pressing member (42) further includes a first traction hole (422). The second flexible member passes through the first traction hole (422) and is connected to the first catheter (1).

7. The valve delivery device according to claim 5, wherein, The transmission assembly (5) includes a transmission mechanism and a moving member (51). The moving member (51) is connected to the transmission mechanism. The first catheter (1) is connected to the transmission mechanism. When the moving member (51) moves, it can make the transmission mechanism move and drive the first catheter (1) to move along the axial direction of the first catheter (1).

8. The valve delivery device according to claim 7, wherein, The transmission mechanism includes a transmission member (53) and a first rotating shaft (52). The transmission member (53) is located inside the first rotating shaft (52). The moving member (51) is sleeved on the first rotating shaft (52) and rotates around the first rotating shaft (52). The moving member (51) is connected to the transmission member (53). The first catheter (1) is connected to the transmission member (53).

9. The valve delivery device according to claim 8, wherein, The valve delivery device includes a limiting member (7). When the limiting member (7) is in a limiting state, it can limit the rotation of the moving member (51), thereby restricting the first catheter (1) and the second flexible member from driving the pressing member (42) to disengage from the fixing member (41), and further restricting the valve from detaching from the valve delivery device. When the limiting member (7) is in a non-limiting state, it can release the limit on the moving member (51) so that the moving member (51) rotates, and drive the pressing member (42) to disengage from the fixing member (41) through the first catheter (1) and the second flexible member, so that the valve automatically detaches from the valve delivery device.

10. The valve delivery device according to claim 9, wherein, The valve delivery device includes an avoidance portion (82). The transmission member (53) is provided with a limiting and cooperating member (531). When the limiting member (7) extends out of the avoidance portion (82), the limiting and cooperating member (531) and the limiting member (7) can cooperate so that the transmission member (53) abuts against the limiting member (7) to limit the rotation of the moving member (51). When the limiting member (7) is pressed back into the avoidance portion (82), the limiting member (7) and the limiting and cooperating member (531) can be disengaged so that the moving member (51) rotates.

11. The valve delivery device according to any one of claims 1-10, characterized in that, The adjustment assembly (6) includes a second rotating shaft (62) and a knob (61). The knob (61) is sleeved on the second rotating shaft (62). The second end (415b) is wound around the second rotating shaft (62). When the knob (61) rotates, it can drive the second rotating shaft (62) to rotate, so that the number of winding turns of the first flexible member (415) on the second rotating shaft (62) increases or decreases.

12. The valve delivery device according to claim 11, wherein, The adjustment assembly (6) further includes a knob fixing member (63). The knob fixing member (63) cooperates with the knob (61) in a direction perpendicular to the second rotating shaft (62).

13. The valve delivery device according to any one of claims 1-10, characterized in that, The valve delivery device further includes a third catheter (3). The third catheter (3) is sleeved inside the second catheter (2). The third catheter (3) is used to accommodate a guide wire.

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