Heart valve delivery assembly and unlocking tubes

Abstract

Provided are a heart valve delivery assembly and unlocking tubes. The heart valve delivery assembly comprises an outer sheath tube (1), an outer tube apparatus (2), an inner tube apparatus (3), and a valve stent (4). The outer tube apparatus (2) comprises an outer tube (21) and a plurality of unlocking structures. Each of the unlocking structures comprises an unlocking tube (23) and a traction strip (22) that are connected. Each of the unlocking tubes (23) comprises a spring tube (25) and a limiting structure (24). Each of the limiting structures (24) comprises a first tube (241), a second tube (242), and a connecting strip (243). The first tubes (241) and the second tubes (242) are coaxially arranged. The first tubes (241) and the second tubes (242) are arranged apart. The first tubes (241) and the second tubes (242) are connected by means of the connecting strips (243). The spring tubes (25) are located in the spacing space. One end of the spring tubes (25) is connected to the first tubes (241), and an adjustment space is formed between the other end of the spring tubes (25) and the second tubes (242). The traction strips (22) are connected to the other end of the spring tubes (25). The unlocking structures are connected to the far end of the outer tube (21) by means of the traction strips (22) thereof. When the valve stent (4) is released, it can be ensured that the unlocking tubes (23) move as a whole toward the near end side, so that the connection between a hanging lug (32) and a hanging head (41) can be exposed, ensuring that the valve stent (4) can be successfully released.

Description

Heart valve delivery assembly and unlocking tube TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a heart valve delivery assembly and an unlocking tube. BACKGROUND

[0002] The prior art CN113855330A discloses a structure for quick connection to release a heart valve stent, which discloses a spring type unlocking sleeve, which can be extended and retracted in the axial direction. When connecting the ear hook with the hanging head on the valve stent, the unlocking sleeve can be compressed in the proximal direction to expose the ear hook from the distal end of the unlocking sleeve, thereby facilitating the connection of the hanging head and the ear hook. After the connection is completed, the unlocking sleeve is loosened, the length of the unlocking sleeve is lengthened, and the distal end of the unlocking sleeve moves towards the hanging head side, so that the head end of the ear hook and the hanging head enter the unlocking sleeve, thereby preventing the ear hook and the hanging head from being separated. When the valve stent needs to be released, the unlocking sleeve is pulled towards the proximal end at this time. Due to the presence of resistance, the proximal end of the unlocking sleeve moves towards the proximal end, while the position of the distal end of the unlocking sleeve remains basically unchanged, so that the length of the unlocking sleeve is lengthened, and the connection position of the ear hook and the hanging head is located in the distal end part of the unlocking sleeve, so that the connection position cannot be exposed, thereby causing the release of the heart valve to be unsuccessful, affecting the performance of the interventional surgery. TECHNICAL PROBLEM

[0003] Therefore, the present application provides a heart valve delivery assembly and an unlocking tube, which can ensure that the entire unlocking tube moves towards the proximal end when releasing the valve stent, so that the connection position of the ear hook and the hanging head can be exposed, and the valve stent can be successfully released. TECHNICAL SOLUTION

[0004] A heart valve delivery assembly comprises an outer sheath tube, an outer tube device, an inner tube device and a valve stent,

[0005] The outer tube device comprises an outer tube and a plurality of unlocking structures, the unlocking structure comprises an unlocking tube and a traction strip connected with each other, the unlocking tube comprises a spring tube and a limiting structure, the limiting structure comprises a first tube, a second tube and a connecting strip, the first tube and the second tube are coaxially arranged, and the first tube and the second tube are arranged at intervals in the axial direction of the first tube, so that a spacing space is formed between the first tube and the second tube. The first tube and the second tube are connected through the connecting strip. The spring tube is located in the spacing space, the axis of the spring tube and the axis of the first tube are located on the same straight line, and one end of the spring tube is connected with the first tube. An adjustment space is formed between the other end of the spring tube and the second tube, and the traction strip is connected with the other end of the spring tube. The unlocking structure is connected with the distal end of the outer tube through the traction strip thereof. The plurality of unlocking structures are arranged at equal angles in the circumferential direction of the outer tube.

[0006] The inner tube device comprises an inner tube and a plurality of hanging ears, the number of the hanging ears is equal to and one-to-one corresponding to the number of the unlocking structures, the plurality of the hanging ears are connected to the distal end of the inner tube, the plurality of the hanging ears are arranged at equal angles in the circumferential direction of the inner tube, the inner tube is located in the outer tube, the hanging ear passes through the second tube, the spring tube and the first tube of the corresponding unlocking structure;

[0007] The valve stent comprises a stent and a valve, the valve is laid on the stent, one end of the stent is provided with a plurality of hanging heads, the number of the hanging heads is equal to and one-to-one corresponding to the number of the hanging ears, and the corresponding hanging ear is connected with the hanging head.

[0008] The outer tube is sleeved in the outer sheath tube.

[0009] Preferably, the first tube is provided with a first connecting point at one end close to the second tube, and the first connecting point is located on the outer circumferential surface of the first tube; the second tube is provided with a second connecting point at one end close to the first tube, and the second connecting point is located on the outer circumferential surface of the second tube; in the circumferential direction of the first tube, the first connecting point and the second connecting point are located at the same position, one end of the connecting strip is connected with the first connecting point, and the other end of the connecting strip is connected with the second connecting point.

[0010] The connecting strip comprises a first inclined section, a straight section and a second inclined section connected in sequence, and the straight section is parallel to the axis of the first tube.

[0011] From the direction of the first tube towards the second tube, the first inclined section inclines towards the radial outside of the first tube, and the second inclined section inclines towards the radial inside of the first tube.

[0012] Preferably, the spring tube comprises a first tube section, a spring section and a second tube section connected in sequence, the first tube section is connected with the first tube, and the traction strip is connected with the second tube.

[0013] Preferably, the inner diameter of the first tube, the inner diameter of the first tube, the inner diameter of the second tube and the inner diameter of the second tube are equal, and the outer diameter of the first tube, the outer diameter of the first tube, the outer diameter of the second tube and the outer diameter of the second tube are equal.

[0014] In the natural state, the inner diameter of the spring section is equal to the inner diameter of the first tube section, and the outer diameter of the spring section is equal to the outer diameter of the first tube section.

[0015] Preferably, in the natural state, the other end of the spring tube abuts against the second tube.

[0016] The present application also relates to an unlocking tube, which is the unlocking tube in the aforementioned heart valve delivery assembly. Advantages

[0017] The present application replaces the unlocking sleeve in the prior art with an unlocking tube, the traction strip has a certain rigidity, the traction strip is connected with the other end (proximal end) of the spring tube, the distal end of the spring tube is connected with the first tube, the ear is arranged in the spring tube, and the distal end of the ear is located in the first tube in a natural state; when assembling the heart valve delivery assembly, the ear needs to be connected with the hanging head on the valve stent, at this time, the first tube is manually compressed to move the first tube to the proximal end side, because the traction strip has a certain rigidity, the traction strip pushes against the proximal end of the spring tube, so that the proximal end of the spring tube cannot move to the proximal end side, which causes the spring tube to be compressed, and the distal end of the ear is exposed from the first tube, so that the ear is connected with the hanging head, after the ear is connected with the hanging head, the first tube is released, the spring tube is no longer compressed, and the spring tube is stretched under the action of its own elasticity, so that the first tube moves to the distal end side, so that the hanging head and the distal end of the ear enter the first tube, thereby preventing the hanging head and the ear from being separated.

[0018] When the valve stent needs to be released, the traction strip is pulled to the proximal end side, the traction strip pulls the proximal end of the spring tube, so that the proximal end of the spring tube moves to the proximal end side, even if the first tube cannot move to the proximal end side because of the existence of resistance, which causes the spring tube to be lengthened until the proximal end of the spring tube contacts the second tube, because the second tube is connected with the first tube through the rigid connecting strip, when the spring tube continues to be pulled to the proximal end side, the spring tube pushes the second tube to move to the proximal end side, so that the first tube also moves to the proximal end side, so that the connection position of the ear and the hanging head can be exposed, so that the valve can be successfully released, and the smooth progress of the interventional operation is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application taken in conjunction with the accompanying drawings, in which:

[0020] Fig. 1 is a structural schematic view of a heart valve delivery assembly;

[0021] Fig. 2 is a structural schematic view of an outer tube device;

[0022] Fig. 3 is a structural schematic view of an inner tube device;

[0023] Fig. 4 is a structural schematic view of an unlocking structure;

[0024] Fig. 5 is a cooperation schematic view I of an unlocking structure, an ear and a hanging head;

[0025] Fig. 6 is a cooperation schematic view II of an unlocking structure, an ear and a hanging head;

[0026] Figure 7 is a schematic diagram of the cooperation of the unlocking structure, the ear, and the head, III;

[0027] Figure 8 is a schematic diagram of the cooperation of the unlocking structure, the ear, and the head, IV;

[0028] Figure 9 is a schematic diagram of the cooperation of the unlocking structure, the ear, and the head, V;

[0029] Figure 10 is a schematic diagram of the cooperation of the unlocking structure, the ear, and the head, VI.

[0030] In the figure: 1, outer sheath tube; 2, outer tube device; 3, inner tube device; 4, valve stent;

[0031] 21, outer tube; 22, traction strip; 23, unlocking tube; 24, limiting structure; 25, spring tube; 26, adjustment space;

[0032] 31, inner tube; 32, ear;

[0033] 41, head;

[0034] 241, first tube; 242, second tube; 243, connecting strip;

[0035] 251, first tube segment; 252, second tube segment; 253, spring segment. Best mode of the present application

[0036] The present application is described in the following based on examples, but the present application is not limited to these examples only. In the following detailed description of the present application, some specific details are described in detail in order to avoid obscuring the essence of the present application, and well-known methods, processes, procedures, elements are not described in detail.

[0037] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0038] Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0039] In the description of the present application, it should be understood that the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise stated, the meaning of "multiple" is two or more.

[0040] In the present application, when performing interventional surgery, "near" refers to the side close to the operator, and "far" refers to the side close to the heart chamber.

[0041] Referring to FIGS. 1-10, the present application provides a heart valve delivery assembly, which comprises an outer sheath 1, an outer tube device 2, an inner tube device 3 and a valve stent 4.

[0042] The outer tube device 2 comprises an outer tube 21 and a plurality of unlocking structures, the unlocking structure comprises an unlocking tube 23 and a traction strip 22 connected with each other, the unlocking tube 23 comprises a spring tube 25 and a limiting structure 24, the limiting structure 24 comprises a first tube 241, a second tube 242 and a connecting strip 243, the first tube 241 and the second tube 242 are coaxially arranged, in the axial direction of the first tube 241, the first tube 241 and the second tube 242 are arranged at intervals, so that a spacing space is formed between the first tube 241 and the second tube 242, the first tube 241 and the second tube 242 are connected through the connecting strip 243, the spring tube 25 is located in the spacing space, the axis of the spring tube 25 and the axis of the first tube 241 are located on the same straight line, one end of the spring tube 25 is connected with the first tube 241; the other end of the spring tube 25 and the second tube 242 form an adjustment space 26 (preferably, the length of the adjustment space 26 is 0), the traction strip 22 is connected with the other end of the spring tube 25, the unlocking structure is connected with the distal end of the outer tube 21 through its traction strip 22, a plurality of the unlocking structures are arranged at equal angles in the circumferential direction of the outer tube 21.

[0043] The inner tube device 3 comprises an inner tube 31 and a plurality of ear hooks 32, the number of the ear hooks 32 is equal to and corresponds to the number of the unlocking structures, a plurality of the ear hooks 32 are connected to the distal end of the inner tube 31, a plurality of the ear hooks 32 are arranged at equal angles in the circumferential direction of the inner tube 31, the inner tube 31 is located in the outer tube 21, the ear hook 32 passes through the second tube 242 of the corresponding unlocking structure, the spring tube 25 and the first tube 241.

[0044] The valve stent 4 comprises a stent and a valve, the valve is laid on the stent, one end of the stent is provided with a plurality of hanging heads 41, the number of the hanging heads 41 is equal to and corresponds to the number of the ear hooks 32, the corresponding ear hook 32 is connected with the hanging head 41.

[0045] The outer tube 21 is sleeved in the outer sheath 1.

[0046] Referring to FIG. 4, for the limiting structure 24, the limiting structure 24 comprises a first tube 241, a second tube 242 and a connecting strip 243, the connecting strip 243 has a certain rigidity, the first tube 241 and the second tube 242 are connected through the connecting strip 243, and the connecting strip 243 is in a strip shape, so that the relative position of the first tube 241 and the second tube 242 is basically unchanged, that is, the length of the interval space is basically unchanged; in a natural state, the length of the spring tube 25 is less than or equal to the length of the interval space, so that the spring tube 25 can be arranged in the interval space, one end (distal end) of the spring tube 25 is connected with the first tube 241, so that the relative position of the distal end of the spring tube 25 and the first tube 241 is fixed, and the other end (proximal end) of the spring tube 25 is arranged in suspension, since the length of the spring tube 25 is less than or equal to the length of the interval space, an adjustment space 26 is formed between the proximal end of the spring tube 25 and the second tube 242 (when the length of the spring tube 25 is equal to the length of the interval space, the length of the adjustment space 26 is 0); the spring tube 25 has elastic ability (similar to a spring), and in the axial direction of the spring tube 25, the spring tube 25 can be compressed or elongated, so as to change the length of the spring tube 25.

[0047] The spring tube 25, the first tube 241 and the second tube 242 are all in a tubular structure, so that the lug 32 can pass through the unlocking tube 23.

[0048] The purpose of the present application is how to solve the connection of the lug 32 and the hanging head 41, and the normal separation of the lug 32 and the hanging head 41 when the valve stent 4 is released.

[0049] In the present application, the outer tube 21 is a metal tube, a plurality of unlocking structures are connected to the distal end of the outer tube 21, for the convenience of understanding, one of the unlocking structures is taken as an example for description, the unlocking structure comprises an unlocking tube 23 and a traction strip 22, the distal end of the traction strip 22 is connected with the proximal end of the spring tube 25, the proximal end of the traction strip 22 is connected with the distal end of the outer tube 21, the traction strip 22 is a metal strip, which has a certain rigidity, that is, in a normal use scenario, the traction strip 22 basically does not bend (or the bending degree is small), so that the relative position of the distal end of the outer tube 21 and the proximal end of the spring tube 25 is basically unchanged.

[0050] The inner tube 31 is sleeved in the outer tube 21, the proximal end of the lug 32 is connected with the distal end of the inner tube 31, the lug 32 is in a strip shape as a whole, the lug 32 can pass through the second tube 242 and the spring tube 25, so that the distal end of the lug 32 is located in the first tube 241 (the spring tube 25 is in a natural state).

[0051] In the natural state, the distal end of the ear 32 is located in the first tube 241, and when it is necessary to connect the ear 32 with the hanging head 41 on the valve stent 4, it is necessary to expose the distal end of the ear 32, at which time the first tube 241 is manually pressed to the proximal side, as shown in the embodiment of FIG. 5, the first tube 241 is pushed to the right, so that the first tube 241 moves to the right, and the second tube 242 is connected with the first tube 241 through the connecting strip 243, so that the position of the second tube 242 relative to the first tube 241 does not change, and thus the second tube 242 also moves to the right synchronously. Since the left end (distal end) of the spring tube 25 is connected with the first tube 241, the left end of the spring tube 25 also moves to the right. The right end (proximal end) of the spring tube 25 is connected with the traction strip 22, and the traction strip 22 has a certain rigidity, that is, the traction strip 22 will hinder the right end of the spring tube 25 from moving to the right, which causes the spring tube 25 to be compressed, so that the length of the adjustment space 26 becomes larger. Since the first tube 241 moves to the right, and the position of the ear 32 remains unchanged, the distal end (left end) of the ear 32 is exposed from the first tube 241 (shown in FIG. 6), thereby facilitating the connection of the distal end of the ear 32 with the hanging head 41.

[0052] After the ear 32 is connected with the hanging head 41 (shown in FIG. 7), the first tube 241 is loosened. Since the spring tube 25 is compressed, and the position of the right end (proximal end) of the spring tube 25 is limited by the traction strip 22, the left end (distal end) of the spring tube 25 moves to the left, so that the first tube 241 and the second tube 242 move to the left at the same time, thereby causing the distal end of the ear 32 to re-enter the first tube 241. Since the ear 32 is connected with the hanging head 41, the connection position of the two is located in the first tube 241 (shown in FIG. 8), and due to the limitation of the first tube 241, the hanging head 41 and the ear 32 will not be loosened.

[0053] When performing an interventional operation, the valve stent 4 is delivered to the aortic valve, and it is necessary to release the valve stent 4 to replace the failed native valve. When releasing the aortic valve, the outer tube 21 is pulled to the proximal side (to the right), and the inner tube 31 remains stationary. Since the outer tube 21 moves to the right, the traction strip 22 moves to the right, the distal end of the traction strip 22 is connected with the proximal end of the spring tube 25, so that the proximal end of the spring tube 25 moves to the right, and in most cases, the entire spring tube 25 moves to the right, thereby causing the first tube 241 to move to the right (i.e., the entire unlocking tube 23 moves to the right), so that the connection position of the ear 32 and the hanging head 41 is exposed from the first tube 241, and the ear 32 and the hanging head 41 can be loosened, thereby achieving the purpose of releasing the valve stent 4.

[0054] In some cases, the spring tube 25 is subjected to external resistance, so that when the right end of the spring tube 25 is pulled to the right, the spring tube 25 does not move to the right as a whole, but is elongated, and the position of the left end of the spring tube 25 remains unchanged, so that the connection position of the ear 32 and the head 41 cannot be exposed to the first tube 241; in this case, the traction strip 22 is pulled to the right, the right end of the spring tube 25 is pulled to the right, the spring tube 25 is elongated, and the right end of the spring tube 25 moves towards the second tube 242, so that the length of the adjustment space 26 is shortened, until the right end of the spring tube 25 contacts the second tube 242 (shown in FIG. 9), and the traction strip 22 is continuously pulled to the right, the spring tube 25 moves to the right against the second tube 242, and the second tube 242 is connected to the first tube 241 through the connecting strip 243, so that the first tube 241 also moves to the right, thereby ensuring that the connection position of the ear 32 and the head 41 can be normally exposed (shown in FIG. 10), ensuring that the valve stent 4 can be successfully released, and ensuring that the interventional operation can be normally performed.

[0055] In addition, in the natural state, the length of the adjustment space 26 is not greater than 5 mm, so that when the valve stent 4 is released, only 5 mm of additional proximal pulling is required to ensure that the valve stent 4 is successfully released, which is convenient and fast.

[0056] Preferably, the length of the adjustment space 26 is 0, so that in the natural state, the other end (proximal end) of the spring tube abuts against the second tube, so that when the valve stent 4 is released, pulling the traction strip 22 to the right will directly move the second tube 242 to the right, so that the first tube 241 also moves to the right, ensuring that the connection position of the ear 32 and the head 41 can be immediately exposed, and ensuring that the valve stent 4 can be successfully released.

[0057] When the inner tube device is installed into the outer sheath tube, the outer sheath tube pushes the spring tube to the distal side, so that the spring tube moves to the distal side, ensuring that the connection position of the ear 32 and the head 41 is located in the first tube 241, preventing the ear 32 and the head 41 from falling off.

[0058] The first tube 241 is provided with a first connecting point at one end close to the second tube 242, and the first connecting point is located on the outer peripheral surface of the first tube 241; the second tube 242 is provided with a second connecting point at one end close to the first tube 241, and the second connecting point is located on the outer peripheral surface of the second tube 242; in the circumferential direction of the first tube 241, the first connecting point and the second connecting point are located at the same position, one end of the connecting strip 243 is connected to the first connecting point, and the other end of the connecting strip is connected to the second connecting point.

[0059] The connecting strip 243 comprises a first inclined section, a straight section and a second inclined section connected in sequence, and the straight section is parallel to the axis of the first tube 241.

[0060] From the direction of the first tube 241 towards the second tube 242, the first inclined section is inclined towards the radial outside of the first tube 241, and the second inclined section is inclined towards the radial inside of the first tube 241.

[0061] The length of the first inclined section is equal to the length of the second inclined section, the length of the straight section is much greater than the length of the first inclined section, and the inclined directions of the first inclined section and the second inclined section are such that the straight section is far away from the spring tube 25, so that the connecting strip 243 will not be clamped into the spring tube 25 during the expansion and contraction of the spring tube 25, ensuring that the spring tube 25 can normally expand and contract, and ensuring that the interventional operation can be smoothly performed.

[0062] The spring tube 25 comprises a first tube section 251, a spring section 253 and a second tube section 252 connected in sequence, the first tube section 251 is connected with the first tube 241, and the traction strip 22 is connected with the second tube section 252.

[0063] The inner diameter of the first tube 241, the inner diameter of the first tube section 251, the inner diameter of the second tube section 252 and the inner diameter of the second tube 242 are equal, and the outer diameter of the first tube 241, the outer diameter of the first tube section 251, the outer diameter of the second tube section 252 and the outer diameter of the second tube 242 are equal.

[0064] In a natural state, the inner diameter of the spring section is equal to the inner diameter of the first tube section, and the outer diameter of the spring section is equal to the outer diameter of the first tube section.

[0065] So that the inner diameter and the outer diameter of the unlocking tube 23 (except the connecting strip 243) are basically consistent, and the lug 32 is conveniently inserted into the unlocking tube 23.

[0066] The application also relates to an unlocking tube 23, which has been described above, and will not be described here again.

[0067] It should be understood that the above-described implementations are merely exemplary, and are not limiting, and that various obvious or equivalent modifications or substitutions for the above-described details can be made by those skilled in the art without departing from the spirit of the present application, and all such modifications or substitutions are intended to be included within the scope of the claims of the present application.

Claims

1. [Amended pursuant to Rule 26 10.10.2024] A heart valve delivery assembly characterized in that, The outer sheath tube, the outer tube device, the inner tube device and the valve support, The outer tube device comprises an outer tube and a plurality of unlocking structures, the unlocking structure comprises an unlocking tube and a traction strip connected with each other, the unlocking tube comprises a spring tube and a limiting structure, the limiting structure comprises a first tube, a second tube and a connecting strip, the first tube is coaxially arranged with the second tube, in the axial direction of the first tube, the first tube is arranged at intervals with the second tube, so that the interval space is formed between the first tube and the second tube, the first tube and the second tube are connected through the connecting strip, the spring tube is located in the interval space, the axis of the spring tube and the axis of the first tube are located on the same straight line, one end of the spring tube is connected with the first tube; the other end of the spring tube and the second tube form an adjustment space, the traction strip is connected with the other end of the spring tube, the unlocking structure is connected with the distal end of the outer tube through the traction strip, and a plurality of unlocking structures are arranged at equal angles in the circumferential direction of the outer tube. The inner tube device comprises an inner tube and a plurality of hanging ears, the number of the hanging ears is equal to and corresponds to the number of the unlocking structures, a plurality of the hanging ears are connected to the distal end of the inner tube, and a plurality of the hanging ears are arranged at equal angles in the circumferential direction of the inner tube, the inner tube is located in the outer tube, and the hanging ear passes through the second tube, the spring tube and the first tube of the corresponding unlocking structure. The valve support comprises a support and a valve, the valve is arranged on the support, one end of the support is provided with a plurality of hanging heads, the number of the hanging heads is equal to and corresponds to the number of the hanging ears, and the corresponding hanging ear is connected with the hanging head. The outer tube is sleeved in the outer sheath tube.

2. The heart valve delivery assembly of claim 1, wherein, The first tube is provided with a first connecting point at one end close to the second tube, and the first connecting point is located on the outer circumferential surface of the first tube; the second tube is provided with a second connecting point at one end close to the first tube, and the second connecting point is located on the outer circumferential surface of the second tube; in the circumferential direction of the first tube, the first connecting point and the second connecting point are located at the same position, one end of the connecting strip is connected with the first connecting point, and the other end of the connecting strip is connected with the second connecting point. The connecting strip comprises a first inclined section, a straight section and a second inclined section connected in sequence, and the straight section is parallel to the axis of the first tube. From the direction of the first tube towards the second tube, the first inclined section inclines towards the radial outside of the first tube, and the second inclined section inclines towards the radial inside of the first tube.

3. The heart valve delivery assembly of claim 1, wherein, The spring tube comprises a first tube section, a spring section and a second tube section connected in sequence, the first tube section is connected with the first tube, and the traction strip is connected with the second tube section.

4. The heart valve delivery assembly of claim 3, wherein, The inner diameter of the first tube, the inner diameter of the first tube section, the inner diameter of the second tube section and the inner diameter of the second tube are equal, and the outer diameter of the first tube, the outer diameter of the first tube section, the outer diameter of the second tube section and the outer diameter of the second tube are equal. In the natural state, the inner diameter of the spring section is equal to the inner diameter of the first tube section, and the outer diameter of the spring section is equal to the outer diameter of the first tube section.

5. [Amended pursuant to Rule 26 10.10.2024] The heart valve delivery assembly of claim 1, wherein, In a natural state, the other end of the spring tube is in abutment with the second tube.

6. [Amended pursuant to Rule 26 10.10.2024] A release tube, characterized in that, The unlocking tube is an unlocking tube in the heart valve delivery assembly of any one of claims 1-5.

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