Novel valve conveying device and novel valve conveying system

Abstract

The utility model discloses a novel valve conveying device and a novel valve conveying system. The novel valve conveying device comprises an outer sheath tube; the inner sheathing canal is movably arranged in the outer sheathing canal in a penetrating manner, and a release wire is arranged in the inner sheathing canal in a penetrating manner; the core tube is movably arranged in the inner sheath tube in a penetrating manner, one end of the core tube is provided with a fixed end, the core tube is further connected with a fixed claw and a recovery guide part, the core tube is further provided with two limiting parts located between the fixed end and the fixed claw, the recovery guide part is slidably arranged between the two limiting parts, and the recovery guide part is in guide fit with the core tube in the axial direction of the core tube; the capsule assembly comprises a capsule cavity and a pull wire, the pull wire movably penetrates through the core tube, one end of the pull wire is connected with the capsule cavity, and the capsule cavity is used for loading the valve stent connected by the fixing end and the fixing claw. By means of the mode, the novel valve conveying device can avoid the situation that the valve support is carried when the capsule cavity is withdrawn.

Description

Technical Field

[0001] This application relates to the field of interventional valve surgery related instruments, and in particular to a novel valve delivery device and a novel valve delivery system. Background Technology

[0002] Transcatheter aortic valve replacement (TAVR) is a minimally invasive surgical procedure widely used internationally for the treatment of aortic valve disease. It involves using an interventional catheter to deliver an artificial heart valve to the aortic valve location, thus completing the implantation and restoring valve function. TAVR is a current trend in the treatment of aortic valve disease due to its minimal trauma, rapid recovery, and high postoperative quality of life for patients.

[0003] For regurgitation-type aortic valve disease, current TAVR products mostly use a stent with a positioning device. The positioning device is inserted into the valve sinus to position the valve, so that the valve leaflet position coincides with the original valve leaflet in the human body. This ensures better postoperative hemodynamics of the valve. At the same time, the clamping force of the positioning device and valve stent on the original valve leaflet ensures strong support after valve implantation, making it suitable for regurgitation-type aortic valve disease.

[0004] During TAVR surgery, the delivery system delivers the valve stent to the ascending main segment. The main body of the stent is compressed within the capsule cavity to await release. By controlling the forward movement and rotation of the delivery system, the three positioning elements of the valve are inserted into the valve sinuses, and then the valve is released.

[0005] Currently, most regurgitation valves use an advance release method, where the capsule cavity is moved towards the ventricle by manipulating a handle to release the stent. During the retrieval of the capsule cavity, due to the anatomical shape of human blood vessels, the capsule cavity often fits against the greater curvature of the blood vessel. At this time, retracting the capsule cavity can easily catch the bottom of the stent, causing the stent to fly away. Utility Model Content

[0006] This application provides a novel valve delivery device and a novel valve delivery system to solve the problem that existing novel valve delivery devices are prone to carrying away valve stents when retracting the capsule cavity.

[0007] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a novel valve delivery device. This novel valve delivery device includes: an outer sheath; an inner sheath movably inserted within the outer sheath, with a release wire inserted within the inner sheath; a core tube movably inserted within the inner sheath, one end of which is fixed, and a fixing claw and a retrieval guide are connected to the core tube. The core tube also has two spaced-apart limiting members located between the fixed end and the fixing claw. The retrieval guide is slidably disposed between the two limiting members, and the retrieval guide engages with the core tube along its axial direction. The fixed end is used to connect to a first end of a valve stent, and the release wire and the fixing claw are used to connect to a second end of the valve stent. A capsule assembly includes a capsule cavity and a traction wire, the traction wire being movably inserted within the core tube and one end connected to the capsule cavity. The capsule cavity is used to load the valve stent connected by the fixed end and the fixing claw. The retrieval guide guides the capsule cavity to move into the outer sheath during retrieval.

[0008] In some embodiments, the recovery guide includes a base and a tapered self-expanding portion, the small end of the tapered self-expanding portion being connected to the base, and the large end of the tapered self-expanding portion being away from the fixing claw;

[0009] The base has an inner hole for fitting onto the core tube, and the ratio of the inner hole diameter to the outer diameter of the core tube is 1 to 1.5.

[0010] In some embodiments, the ratio of the equivalent outer diameter of the large end of the conical self-expanding portion to the opening outer diameter of the capsule cavity is 1.1 to 1.5, and the ratio of the equivalent outer diameter to the inner diameter of the outer sheath is 0.9 to 1.0.

[0011] In some embodiments, the tapered self-expanding portion includes a plurality of self-expanding rods that are circumferentially distributed around the base and are in an open shape.

[0012] In some embodiments, the tapered self-expanding portion further includes a connecting wire connecting each of the self-expanding rods, the connecting wire being located outside the tapered space defined by the plurality of self-expanding rods, the connecting wire being a shape memory metal wire or a polymer elastic wire.

[0013] In some embodiments, the conical self-expanding portion further includes a covering layer disposed on the outside of each of the self-expanding rods, the covering layer being a polymer elastic film or a woven mesh made of shape memory metal wires.

[0014] In some embodiments, the conical self-expanding portion is a woven mesh structure made of shape memory metal wires.

[0015] In some embodiments, the woven mesh structure includes a conical sub-mesh and a cylindrical sub-mesh, the small end of the conical sub-mesh being connected to the base, the large end of the conical sub-mesh being connected to the cylindrical sub-mesh, the weaving density of the conical sub-mesh being greater than the weaving density of the cylindrical sub-mesh, and the end of the cylindrical sub-mesh facing away from the conical sub-mesh being expanded.

[0016] In some embodiments, the distance between the limiting member near the fixed end and the fixed end is 10-30mm, and the distance between the two limiting members along the axial direction of the core tube is 1-20mm.

[0017] In some embodiments, the core tube is provided with a first guide portion, and the base is provided with a second guide portion. The first guide portion and the second guide portion are guided and cooperated along the axial direction of the core tube. The first guide portion is one of a slide rail and a slide groove, and the second guide portion is the other of the slide rail and the slide groove.

[0018] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a novel valve delivery system, which includes a valve stent and a novel valve delivery device as described above, wherein the novel valve delivery device is used to load and deliver the valve stent.

[0019] The beneficial effects of this application are as follows: Unlike existing technologies, this application discloses a novel valve delivery device and a novel valve delivery system. In this application, by making the retrieval guide movable—that is, slidingly mounted on the core tube—and while keeping the second end of the valve stent connected to the release wire and the fixing claw, the capsule cavity is retracted. This allows the capsule cavity to push the retrieval guide past the first end of the valve stent, preventing the capsule cavity from getting caught on the first end of the valve stent. Then, the release wire is released, allowing the valve stent to fully deploy and smoothly enter the sinus. This effectively solves the problem of the valve stent easily being pulled away during the retraction of the capsule cavity. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 This is a schematic diagram of an embodiment of the novel valve delivery device provided in this application;

[0022] Figure 2 This is a schematic diagram of the capsule cavity relative to the valve stent and retrieval guide in the novel valve delivery system provided in this application under different states;

[0023] Figure 3 Is it like this? Figure 1 A schematic diagram of the novel valve delivery device shown, illustrating the movement of the capsule cavity and retrieval guide to the outer sheath.

[0024] Figure 4 Is it like this? Figure 1 A schematic diagram of a structural embodiment of the recovery guide in the novel valve delivery device shown;

[0025] Figure 5 Is it like this? Figure 1 A schematic diagram of another embodiment of the recovery guide in the novel valve delivery device shown;

[0026] Figure 6 Is it like this? Figure 1 A schematic diagram of another embodiment of the recovery guide in the novel valve delivery device shown;

[0027] Figure 7 Is it like this? Figure 1 The diagram shows the structure of the novel valve delivery device in which the recovery guide and the limiting component cooperate.

[0028] Figure 8 Is it like this? Figure 1 The diagram shows a structural schematic of the novel valve delivery device in which the recovery guide and the core tube are guided and coordinated. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] The terms "first," "second," and "third" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] This application provides a novel valve delivery system, in conjunction with reference to [reference needed]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of the novel valve delivery device provided in this application. Figure 2 This is a schematic diagram of the capsule cavity relative to the valve stent and retrieval guide in the novel valve delivery system provided in this application under different states.

[0033] The novel valve delivery system 200 includes a valve stent 201 and a novel valve delivery device 100, which is used to load and deliver the valve stent 201.

[0034] The valve stent 201 is a self-expanding artificial valve device. Before it is installed in the novel valve delivery device 100 and released, it is in a contracted state to reduce its volume and facilitate delivery along the vascular pathway. After being delivered to the treatment site and released, it can return to its normal state, self-expanding between the left ventricle and the aorta. Its positioning element captures the leaflets into the sinus, so that the leaflets can replace the original valve.

[0035] The valve stent 201 includes a stent, a skirt, and leaflets. The skirt is connected to the inside of the stent, and the leaflets are connected to the inside of the skirt. The stent is provided with a positioning element. After being released and deployed, the positioning element can capture the leaflets into the sinus, thereby fixing the valve stent 201 so that the leaflets on it can replace the original valve.

[0036] In this embodiment, as Figure 1As shown, the novel valve delivery device 100 includes an outer sheath 10, an inner sheath 20, a core tube 30, and a capsule assembly 40. The inner sheath 20 is movably inserted into the outer sheath 10, and a release wire 21 is inserted within the inner sheath 20. The core tube 30 is movably inserted into the inner sheath 20, and one end of the core tube 30 is provided with a fixed end 31. A fixing claw 32 and a retrieval guide 33 are also connected to the core tube 30. The retrieval guide 33 is located between the fixed end 31 and the fixing claw 32 and is slidably connected to the core tube 30. The fixed end 31 is used for… At the first end 202 of the valve stent 201, the release wire 21 and the fixing claw 32 are used to cooperate with the second end 203 of the valve stent 201; the capsule assembly 40 includes a capsule cavity 41 and a traction wire 42, the traction wire 42 is movably inserted in the core tube 30 and one end is connected to the capsule cavity 41, the capsule cavity 41 is used to load the valve stent 201 connected by the fixing end 31 and the fixing claw 32; wherein, the retrieval guide 33 is used to guide the capsule cavity 31 to move into the outer sheath tube 10 when retrieving the capsule cavity 31.

[0037] The outer sheath 10, inner sheath 20, core tube 30, and traction line 42 are nested together sequentially from the outside to the inside. The traction line 42 can be a silk thread or a tubing. For example, the traction line 42 is a steel cable, which is connected to the capsule cavity 41. The connection method can be welding, injection molding, or bonding. The forward and backward movement of the capsule cavity 41 can be controlled by the corresponding functional handle to move the traction line 42.

[0038] The fixed end 31 and the fixed claw 32 are both connected to the core tube 30 and are used to connect the first end 202 and the second end 203 of the valve stent 201, respectively. The fixed claw 32 is connected to the second end 203 of the valve stent 201 in cooperation with the release wire 21.

[0039] The fixed end 31 is provided with multiple limiting grooves or limiting holes, which can be connected to the T-shaped pieces on the first end 202 of the valve stent 201. After the fixed end 31 and the first end 202 are loaded into the capsule cavity 41, the fixed end 31 and the first end 202 can be kept connected.

[0040] The fixing claw 32 includes multiple arms, which are correspondingly arranged with the release element on the second end 203 of the valve stent 201. During loading, the corresponding release wire 21 can pass through the hole on the release element and connect with the corresponding arm of the fixing claw 32. Each release wire 21 is connected and cooperates with the corresponding arm to realize the traction and adjustment of each release element on the second end 203 of the valve stent 201. Thus, during surgery, the release position of the valve assembly 201 can be adjusted by the fixing claw 32 with the wires not untied.

[0041] During the loading of the valve stent 201 into the novel valve delivery device 100, the first end 202 of the valve stent 201 is connected to the fixed end 31, the second end 203 of the valve stent 201 is connected to the release wire 21 and the fixing claw 32, and the valve stent 201 is also compressed and loaded into the capsule cavity 41 along with the fixed end 31 and the fixing claw 32.

[0042] The retrieval guide 33 is slidably disposed on the core tube 30 and located between the fixed end 31 and the fixed claw 32; during the loading of the valve stent 201, the retrieval guide 33 is located inside the valve stent 201 and is in a compressed state and loaded together in the capsule cavity 41.

[0043] Once loaded, the novel valve delivery device 100, whose capsule cavity 41 containing the valve stent 201, can be delivered to the treatment site via a vascular path determined by a guidewire, and then the valve stent 201 is released.

[0044] The process of releasing the valve stent 201 is as follows: the core tube 30 is retracted by the corresponding handle, so that the valve stent 201 gradually exits the capsule cavity 41. The second end 203 of the valve stent 201 exits the capsule cavity 41 first. The exiting portion of the valve stent 201 gradually expands from a compressed state, and the exiting fixing claw 32 also gradually expands from a compressed state. The second end 203 remains connected to the release wire 21 and the fixing claw 32. After the first end 202 and the fixing end 31 of the valve stent 201 exit the capsule cavity 41, the first end 202 loses contact with the fixing end 31 and expands outwards. The retrieval guide 33 also expands outwards to its original state. At this time, if... Figure 2As shown in (a) and (b), with the release wire 21 still connected to the fixing claw 32, the traction line 42 can be driven by the corresponding handle to retract the capsule cavity 41. This allows the capsule cavity 41 to first pass over the first end 202 of the valve stent 201, and then, by pushing the retrieval guide 33 backward, enter the internal space of the valve stent 201. During this process, when the capsule cavity 41 catches on the first end 202 of the valve stent 201, the resistance generated by the retrieval capsule cavity 41 due to catching the first end 202 of the valve stent 201 is transmitted to the surgeon. At this time, the release wire 21 is not released, and the second end 203 of the valve stent 201 is still fixed by the fixing claw 32. Therefore, the capsule cavity 41 is restricted by the fixing claw 32. 1. The valve stent 201 will not be carried away. The distance of the reverse advance end of the capsule cavity 41 can be adjusted by the traction line 42 to disengage from the first end 202 of the valve stent 201. The posture of the valve stent 201 can be appropriately adjusted by the drive core tube 30, and then the capsule cavity 41 can be retracted so that the capsule cavity 41 crosses the first end 202 of the valve stent 201. Then, the retrieval guide 33 can be pushed backward so that the capsule cavity 41 enters the valve stent 201, avoiding snagging on the first end 202 of the valve stent 201. After the position of the valve stent 201 is corrected, the connection between the release wire 21 and the fixing claw 32 is released so that the valve stent 201 can be fully deployed and smoothly enter the sinus.

[0045] See Figure 3 , Figure 3 Is it like this? Figure 1 The diagram shows the structure of the novel valve delivery device, in which the capsule cavity and the retrieval guide move to the outer sheath. After the valve stent 201 is released, the capsule cavity 201 can be retracted and, guided by the retrieval guide 33, can move together into the outer sheath 10.

[0046] See Figure 4 , Figure 4 Is it like this? Figure 1 The diagram shows a structural schematic of an embodiment of the retrieval guide in the novel valve delivery device. In this embodiment, the retrieval guide 33 includes a base 330 and a tapered self-expanding portion 332. The small end of the tapered self-expanding portion 332 is connected to the base, and the large end of the tapered self-expanding portion 332 is located on the side of the base 330 away from the fixing claw 32. The base 330 has an inner hole for fitting onto the core tube 30, and the ratio of the inner hole diameter to the outer diameter of the core tube is 1 to 1.5.

[0047] The base 330 is calibrated with the core tube 30. By setting the ratio of the inner diameter of the base 330 to the outer diameter of the core tube 30 to 1 to 1.5, the recovery guide 33 can avoid large-scale shaking in the circumference of the core tube 30 and can slide smoothly on the core tube 30.

[0048] Optionally, the ratio of the inner diameter of the base 330 to the outer diameter of the core tube 30 is 1, 1.1, 1.2, 1.3, 1.4 or 1.5.

[0049] The conical self-expanding part 332 is a self-expanding component that can be compressed to be received in the capsule cavity 41 along with the valve stent 201. After the capsule cavity 41 is withdrawn, it can self-expand and unfold into a conical shape. The capsule cavity 41 can enter the large end of the conical self-expanding part 332. As the base 330 and the conical self-expanding part 332 are gradually received in the outer sheath tube 10, the conical self-expanding part 332 can also accurately guide the capsule cavity 41 to be received in the outer sheath tube 10, avoiding the capsule cavity 41 and the outer sheath tube 10 from being misaligned and having difficulty entering the outer sheath tube 10.

[0050] Furthermore, the ratio of the equivalent outer diameter of the large end of the conical self-expanding portion 332 to the opening outer diameter of the capsule cavity 41 is 1.1 to 1.5, so that the large end of the conical self-expanding portion 332 can properly accommodate the end of the capsule cavity 41, while reducing interference with the released valve stent 201.

[0051] Optionally, the ratio of the equivalent outer diameter of the large end of the conical self-expansion section 332 to the opening outer diameter of the capsule cavity 41 can be 1.1, 1.2, 1.3, 1.4 or 1.5.

[0052] Furthermore, the ratio of the equivalent outer diameter of the large end of the conical self-expanding portion 332 to the inner diameter of the outer sheath 10 is 0.9 to 1.0, so that the conical self-expanding portion 332 can be accommodated in the outer sheath 10, and the capsule cavity 41 can also be guided to be accommodated in the outer sheath 10.

[0053] Optionally, the ratio of the equivalent outer diameter of the large end of the conical expansion portion 332 to the inner diameter of the outer sheath 10 is 0.9, 0.95, or 1.0.

[0054] By using the ratio of the equivalent outer diameter of the large end of the conical self-expanding portion 332 to the opening outer diameter of the capsule cavity 41 and the ratio of the equivalent outer diameter of the large end of the conical self-expanding portion 332 to the inner diameter of the outer sheath 10, it can be ensured that the large end of the conical self-expanding portion 332 can accommodate the end of the capsule cavity 41 and can be smoothly retracted into the outer sheath 10 together.

[0055] Continue reading Figure 4 In some embodiments, the conical self-expanding part 332 includes a plurality of self-expanding rods 334 distributed circumferentially around the base 330. The self-expanding rods 334 include guide rods 335, one end of which is connected to the base 330 and is open relative to the core tube 30.

[0056] The conical space formed by multiple self-expanding rods 334 distributed around the base 330 has a large end that can accommodate the end of the capsule cavity 41. Each expansion rod 334 guides the capsule cavity 41 to align with the outer sheath 10 and enter the outer sheath 10 as it gradually enters the outer sheath 10.

[0057] Furthermore, the self-expanding rod 334 may also include a clamping rod 336 connected to the other end of the guide rod 335, the clamping rod 336 being relatively parallel to the core tube 30. That is, multiple clamping rods 336 constitute the large end of the tapered self-expanding part 332. By providing the clamping rods 336, firstly, the capsule cavity 41 can be better limited and guided, and secondly, the risk of the end of the self-expanding rod 334 getting caught on the mesh on the valve stent 201 can be effectively reduced.

[0058] Optionally, the conical self-expanding part 332 also includes a connecting wire 337 connecting the respective expansion rods 334, the connecting wire 337 being located outside the conical space defined by the plurality of self-expanding rods 334.

[0059] The connecting wires 330, which are circumferentially connected to the outside of each expansion rod 334, can provide support between the expansion rods 334 to ensure that the retraction guide 33 is not overturned when the capsule cavity 41 is retracted, specifically ensuring that the conical self-expanding part 332 is not overturned.

[0060] The connecting wire 337 is a shape memory metal wire or a polymer elastic wire, which can become wavy when compressed to facilitate compression into the capsule cavity 41. The connecting wire 337 can alternately pass through the respective expansion rods 334, serving to connect the relatively independent self-expanding rods 334 on the recovery guide 33, thereby increasing the anti-tipping capability. Multiple layers of the connecting wire 337 can be spaced apart on the outer side of each expansion rod 334 to ensure the reliable anti-tipping capability of the tapered guide portion 332.

[0061] Optionally, the conical self-expanding part 332 also includes a covering layer (not shown) disposed on the outside of each expansion rod 334. The covering layer wraps around the outside of each expansion rod 334, which can more effectively increase the anti-tipping capability of the conical self-expanding part 332.

[0062] The covering layer can be a polymer elastic film or a woven mesh made of shape memory metal wires. The polymer elastic film can be, for example, a polyester or polyester material film. The covering layer can also connect the various expansion rods 334 to form a whole, thereby having a strong anti-tipping ability.

[0063] See Figure 5 and Figure 6 , Figure 5 Is it like this? Figure 1 A schematic diagram of another embodiment of the recovery guide in the novel valve delivery device is shown. Figure 6Is it like this? Figure 1 The diagram shows a structural schematic of another embodiment of the recovery guide in the novel valve delivery device. In another embodiment, the conical self-expanding part 332 is a woven mesh structure made of shape memory metal wire. This woven mesh structure is conical in shape to serve the same function as the aforementioned plurality of self-expanding rods 334.

[0064] In other words, the entire conical self-expanding part 332 is woven from memory metal wire in one piece, which makes it more robust and resistant to bending.

[0065] In this embodiment, the woven mesh structure includes a conical sub-mesh 338 and a cylindrical sub-mesh 339. The small end of the conical sub-mesh 338 is connected to the base 330, and the large end of the conical sub-mesh 338 is connected to the cylindrical sub-mesh 339. The weaving density of the conical sub-mesh 338 is greater than that of the cylindrical sub-mesh 339.

[0066] The cylindrical sub-mesh 339 can better accommodate the end of the capsule cavity 41, while the weaving density of the conical sub-mesh 338 is greater than that of the cylindrical sub-mesh 339, ensuring that the entire conical self-expanding part 332 has stronger resistance to deformation when subjected to blood flow impact.

[0067] Furthermore, such as Figure 6 As shown, the end of the cylindrical subnet 339 that is away from the conical subnet 338 is expanded to avoid interfering with the retraction of the capsule cavity 41, making it easier for the capsule cavity 41 to retract into the cylindrical subnet 339.

[0068] See Figure 7 , Figure 7 Is it like this? Figure 1 The diagram shows a structural schematic of the novel valve delivery device in which the recovery guide and the limiting member cooperate. Further, based on the above embodiment, the core tube 30 is also provided with two spaced-apart limiting members 35, located between the fixed end 31 and the fixed claw 32, and the base 330 is slidably disposed between the two limiting members 35.

[0069] The limiting member 35 can be a polymer ring-shaped material or a metal material, and it can be bonded or welded to the core tube 30. The limiting member 35 can be a ring-shaped or block-shaped protruding structure, which can limit the extreme positions on both sides of the recycling guide member 33.

[0070] The movable stroke of the retrieval guide 33 is limited by two limiting members 35 to prevent the retrieval guide 33 from crossing the valve opening area of ​​the valve stent 201 with the impact of blood flow and damaging the valve when the valve is open or closed.

[0071] The distance between the limiting member 35 near the fixed end 31 and the fixed end 31 is 10-30mm. The distance between the two limiting members 35 along the axial direction of the core tube 30 is 1-20mm. Within these two numerical ranges, the retrieval guide 33 can be effectively prevented from damaging the valve due to movement.

[0072] The distance between the limiting member 35 near the fixed end 31 and the fixed end 31 can be 10mm, 15mm, 20mm, 25mm or 30mm, and the axial distance between the two limiting members 35 along the core tube 30 can be 1mm, 5mm, 10mm, 15mm or 20mm.

[0073] See Figure 8 , Figure 8 Is it like this? Figure 1 The diagram shows a structural schematic of the novel valve delivery device in which the recovery guide and the core tube are guided and coordinated.

[0074] Furthermore, the core tube 30 is provided with a first guide portion 361, and the base 330 is provided with a second guide portion 362. The first guide portion 361 and the second guide portion 362 are guided and engaged along the axial direction of the core tube 30.

[0075] The first guide portion 361 exists between at least two limiting members 35. After the first guide portion 361 cooperates with the second guide portion 362, the base 330 can only slide along the axial direction of the core tube 30 and cannot rotate, thus preventing the recycling guide member 33 from rotating in the circumferential direction.

[0076] Specifically, the first guide portion 361 is one of a slide rail and a slide groove, and the second guide portion 362 is the other of a slide rail and a slide groove. For example, the first guide portion 361 is a slide rail provided on the surface of the core tube 30, which is parallel to the axial direction of the core tube 30, and the second guide portion 362 is a slide groove provided on the base 330, which slides in cooperation with the slide rail.

[0077] The first guide portion 361 can be formed by bonding a polymer thin tube to the core tube 30, or it can be a groove machined on the core tube 30, while the second guide portion 362 on the base 330 can be formed by integral cutting.

[0078] In this application, by setting the retrieval guide 33 to be movable, that is, the retrieval guide 33 is slidably disposed on the core tube 30, and while keeping the second end 203 of the valve stent 201 in a state connected to the release wire 21 and the fixing claw 32, the capsule cavity 41 is retracted, so that the capsule cavity 41 can push the retrieval guide 33 past the first end 202 of the valve stent 201, avoiding the capsule cavity 41 from getting caught on the first end 202 of the valve stent 201. Then the release wire 21 is released, so that the valve stent 201 can be fully deployed and smoothly enter the sinus.

[0079] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A novel valve delivery device, characterized in that, include: Outer sheath; An inner sheath is movably inserted into the outer sheath, and a release wire is inserted inside the inner sheath; A core tube is movably inserted into the inner sheath. One end of the core tube is provided with a fixed end, and a fixing claw and a retrieval guide are connected to the core tube. The core tube is also provided with two spaced-apart limiting members located between the fixed end and the fixing claw. The retrieval guide is slidably disposed between the two limiting members, and the retrieval guide is axially guided and engaged with the core tube. The fixed end is used to connect to the first end of the valve stent, and the release wire and the fixing claw are used to connect to the second end of the valve stent. The capsule assembly includes a capsule cavity and a traction wire, the traction wire being movably inserted through the core tube and having one end connected to the capsule cavity, the capsule cavity being used to load a valve stent connected by the fixed end and the fixed claw; The recovery guide is used to guide the capsule cavity to move into the outer sheath during the recovery of the capsule cavity.

2. The novel valve delivery device according to claim 1, characterized in that, The recovery guide includes a base and a conical self-expanding part, the small end of the conical self-expanding part is connected to the base, and the large end of the conical self-expanding part is away from the fixing claw; The base has an inner hole for fitting onto the core tube, and the ratio of the inner hole diameter to the outer diameter of the core tube is 1 to 1.

5.

3. The novel valve delivery device according to claim 2, characterized in that, The ratio of the equivalent outer diameter of the large end of the conical self-expanding portion to the opening outer diameter of the capsule cavity is 1.1 to 1.5, and the ratio of the equivalent outer diameter to the inner diameter of the outer sheath is 0.9 to 1.

0.

4. The novel valve delivery device according to claim 2, characterized in that, The conical self-expanding section includes a plurality of self-expanding rods that are distributed circumferentially around the base and are in an open shape.

5. The novel valve delivery device according to claim 4, characterized in that, The conical self-expanding part further includes a connecting wire connecting each of the self-expanding rods. The connecting wire is located outside the conical space defined by the plurality of self-expanding rods. The connecting wire is a shape memory metal wire or a polymer elastic wire.

6. The novel valve delivery device according to claim 4, characterized in that, The conical self-expanding part also includes a covering layer disposed on the outside of each of the self-expanding rods. The covering layer is a polymer elastic film or a woven mesh made of memory metal wires.

7. The novel valve delivery device according to claim 2, characterized in that, The conical self-expanding part is a woven mesh structure, which is woven from shape memory metal wires.

8. The novel valve delivery device according to claim 7, characterized in that, The woven mesh structure includes a conical sub-mesh and a cylindrical sub-mesh. The small end of the conical sub-mesh is connected to the base, and the large end of the conical sub-mesh is connected to the cylindrical sub-mesh. The weaving density of the conical sub-mesh is greater than that of the cylindrical sub-mesh, and the end of the cylindrical sub-mesh facing away from the conical sub-mesh is in an expanded shape.

9. The novel valve delivery device according to claim 1, characterized in that, The distance between the limiting member near the fixed end and the fixed end is 10-30mm, and the distance between the two limiting members along the axial direction of the core tube is 1-20mm.

10. The novel valve delivery device according to claim 2, characterized in that, The core tube is provided with a first guide portion, and the base is provided with a second guide portion. The first guide portion and the second guide portion are guided and cooperated along the axial direction of the core tube. The first guide portion is one of a slide rail and a slide groove, and the second guide portion is the other of the slide rail and the slide groove.

11. A novel valve delivery system, characterized in that, The novel valve delivery system includes a valve stent and a novel valve delivery device as described in any one of claims 1 to 10, the novel valve delivery device being used to load and deliver the valve stent.

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