Tubular implant member and implant system

Abstract

The invention provides a tubular implantation component and an implantation system, the tubular implantation component comprises a main body section, the main body section comprises a support unit which spirally and continuously extends, the support unit comprises a plurality of support rods which are arranged along the extension direction of the support unit, and connecting parts which connect two adjacent support rods to form a wave crest and a wave trough; each connecting part comprises two first connecting sections and a second connecting section, the two first connecting sections are connected to the ends of the two adjacent supporting rods respectively, the second connecting section is connected with the two first connecting sections, and at least one first connecting section obliquely extends from the second connecting section to the supporting rod connected with the other first connecting section; therefore, when the tubular implanting component is in a compressed state, the adjacent connecting parts in the circumferential direction of the main body section are axially staggered, and the adjacent supporting rods can be parallel to each other and abut against each other; the space utilization rate, the metal coverage rate and the mesh density can be improved, and the effective blood flow guiding effect is achieved; in addition, the tubular implantation component can have the small shortening rate, and opening is reliable.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and particularly to a tubular implant component and an implant system having the tubular implant component. Background Art

[0002] In the past 30 years, interventional therapy mainly based on implanting tubular implant components has developed rapidly. Implanting a tubular implant component is based on percutaneous transluminal angioplasty. Through a catheter, the tubular implant component is sent to the lesion site and expanded to support and dredge blood vessels, or establish a blood vessel access. With continuous development, tubular implant components are now commonly used in the treatment of vascular stenosis and aneurysms. When used to treat vascular stenosis, its function is to support the stenotic blood vessel, keep the blood vessel unobstructed, and reduce the incidence of restenosis. When used to treat aneurysms, its function is to assist in supporting embolization coils and / or provide a blood flow guiding effect. The ultimate goal is to reduce the blood flow in the aneurysm and gradually heal. For tubular implant components, their performance such as radial force, shortening rate, and wall attachment are all key points affecting clinical use. At the same time, in recent years, the rapidly developing blood flow guiding devices (also known as dense mesh stents) for treating aneurysms and tubular implant components for treating venous and peripheral artery stenosis have higher requirements for increasing the metal coverage rate and mesh density without sacrificing the size of the delivery component in the implant system.

[0003] Existing tubular implant components are divided into two types according to the manufacturing process: cut type and braided type. The braided tubular implant component is formed by interlacing single or multiple wires. It has a relatively high metal coverage rate and mesh density, and obvious blood flow guiding effect. At the same time, due to the flexibility of the braided structure, it generally has good flexibility and relatively small radial force, making it feasible to be delivered through a microcatheter. However, a very big problem with this type of tubular implant component is that the shortening rate is huge, and the shortening rate is greatly affected by the release technique. It is difficult to judge the proximal position during release, the surgical operation difficulty is high, and it is easy to have difficulty in opening and not attaching to the wall in tortuous blood vessels, which further increases the surgical difficulty and thus affects the treatment effect. The cut tubular implant component is formed by cutting and shaping a pipe. Its radial force is generally significantly greater than that of the braided tubular implant component. When designed as an open-loop type, the opening and wall attachment are also significantly better than those of the braided tubular implant component, and usually the shortening rate is also significantly smaller than that of the braided tubular implant component. However, due to the cutting process, the size at the rounded corner cannot be made very small. As Figure 1 shown, the shape and arrangement of its units result in the inability to fully utilize the space in the compressed state, resulting in relatively low metal coverage rate and mesh density. Therefore, when designed to be delivered through the same microcatheter as the braided tubular implant component, its metal coverage rate and mesh density are much lower than those of the braided tubular implant component, resulting in poor blood flow guiding effect of the cut tubular implant component. Summary of the Invention

[0004] The object of the present invention is to provide a tubular implant component and an implant system.

[0005] To achieve the above object of the invention, the present invention provides a tubular implant component, including a main body section, the main body section including at least one support unit that surrounds the central axis of the main body section and extends continuously in a spiral manner, the support unit being wavy along its extending direction, the support unit including a plurality of support rods arranged along its extending direction, and connecting portions that connect adjacent two support rods to form wave crests and wave troughs; the connecting portions include two first connecting segments respectively connected to the ends of adjacent two support rods, and a second connecting segment that connects the two first connecting segments, and at least one first connecting segment extends obliquely from the second connecting segment towards the support rod connected to the other first connecting segment.

[0006] As a further improvement of the present invention, when the tubular implant component is in a compressed state, the support rods are straight rods; one of the two first connecting segments extends obliquely from the second connecting segment towards the support rod connected to the other first connecting segment, and the other extends obliquely from the second connecting segment towards the support rod connected to it.

[0007] As a further improvement of the present invention, when the tubular implant component is in a compressed state, the first connecting segments of two adjacent connecting portions in the circumferential direction of the main body section are in contact with each other.

[0008] As a further improvement of the present invention, the support rods are wavy.

[0009] As a further improvement of the present invention, along the direction away from the second connecting segment, the two first connecting segments extend obliquely towards each other.

[0010] As a further improvement of the present invention, the two connecting portions connected to the opposite ends of one support rod are centrosymmetric about the center of the support rod.

[0011] As a further improvement of the present invention, the first connecting segment is arc-shaped, or straight-shaped, or a combination of arc-shaped and straight-shaped.

[0012] As a further improvement of the present invention, the main body section further includes a plurality of connecting rods, and the connecting rods are fixedly connected to adjacent support units or adjacent parts within the support unit along the axial direction of the main body section.

[0013] As a further improvement of the present invention, the connecting rods adjacent in the axial direction of the main body section are arranged in a staggered manner.

[0014] As a further improvement of the present invention, the connecting rods around the central axis of the main body section are evenly arranged; the number of crests / troughs around the central axis of the main body section in the support unit is m, the number of connecting rods around the central axis of the main body section in the support unit is n, and the number of support units is s, where N1×(m÷n) = N2×s, N1 and N2 are both natural numbers, and N1 < n.

[0015] As a further improvement of the present invention, when the tubular implant member is in a compressed state, the included angle between the extending direction of the support unit and the central axis of the main body section is 30° to 60°; and / or the number of support units is 1 to 9.

[0016] As a further improvement of the present invention, the number of support rods around the central axis of the main body section in the support unit is 30 to 160.

[0017] As a further improvement of the present invention, the main body section is a multi-helical structure including a plurality of the support units; the ends of the plurality of support units are located on the same circumference around the central axis of the main body section; the tubular implant member further includes a developer connected to the ends of the support units.

[0018] As a further improvement of the present invention, the tubular implant member further includes end sections connected to opposite ends of the main body section; the end sections include multiple turns of corrugated rings; the wavelength of the corrugated ring farther from the main body section in two adjacent turns of corrugated rings is greater than the wavelength of the corrugated ring closer to the main body section.

[0019] As a further improvement of the present invention, the main body section is a multi-helical structure including a plurality of the support units; the ends of the plurality of support units are located on the same circumference around the central axis of the main body section; the tubular implant member further includes a transition corrugated ring connected between the main body section and the end section, the transition corrugated ring includes a plurality of corrugated segments corresponding to the plurality of support units one by one, the crests of the corrugated segments farther from the main body section are located on the same circumference around the central axis of the main body section, and the arrangement direction of the troughs of the corrugated segments closer to the main body section is the same as the extending direction of the support unit.

[0020] As a further improvement of the present invention, the tubular implant member further includes a developer connected to the corrugated ring farther from the main body section in the end section.

[0021] To achieve the above object of the invention, the present invention further provides an implantation system for a tubular implant member, and the implantation system includes the above tubular implant member.

[0022] The beneficial effects of the present invention are as follows: In the tubular implant component of the present invention, by setting the connecting portion, which is a wave crest or a wave trough, as at least one first connecting segment that extends obliquely from the second connecting segment towards the support rod connected to another first connecting segment, thus, when the tubular implant component is in a compressed state, the connecting portions adjacent in the circumferential direction of the tubular implant component are axially misaligned, and the adjacent support rods in each support ring are parallel and in contact with each other; on the one hand, it can improve the space utilization rate, and further improve the metal coverage rate and mesh density, achieving an effective blood flow guiding effect, and the tubular implant component can be delivered through a microcatheter with a smaller inner diameter; on the other hand, it can make the tubular implant component have a smaller shortening rate and a more reliable opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 6 is a partial structural schematic diagram of a cutting-type tubular implant component in the prior art when in a compressed state;

[0024] Figure 2 FIG. 10 is a structural schematic diagram of the tubular implant component in the first embodiment of the present invention (the tubular implant component is in an expanded state);

[0025] Figure 3 FIG. 14 is Figure 2 the developed view of the tubular implant component in FIG. 10;

[0026] Figure 4 FIG. 20 is Figure 3 the enlarged structural schematic diagram at A in FIG. 20;

[0027] Figure 5 FIG. 26 is Figure 3 the enlarged structural schematic diagram at B in FIG. 26;

[0028] Figure 6 FIG. 32 is Figure 3 the partial structural schematic diagram of the tubular implant component shown in FIG. 34 when in a compressed state;

[0029] Figure 7 FIG. 38 is a partial structural schematic diagram of the tubular implant component in the second embodiment of the present invention when in a compressed state;

[0030] Figure 8 FIG. 42 is a partial structural schematic diagram of the tubular implant component in the third embodiment of the present invention when in a compressed state;

[0031] Figure 9 FIG. 46 is a partial structural schematic diagram of the tubular implant component in the fourth embodiment of the present invention when in a compressed state;

[0032] Figure 10 FIG. 50 is a partial structural schematic diagram of the tubular implant component in the fifth embodiment of the present invention when in an expanded state;

[0033] Figure 11 This is a partial structural schematic diagram of the tubular implant component in the sixth embodiment of the present invention when it is in the expanded state. Specific Embodiments

[0034] The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings. Please refer to Figures 1 to 11 As shown, it is a preferred embodiment of the present invention. However, it should be noted that these embodiments are not limitations on the present invention. Any equivalent transformation or substitution in function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present invention.

[0035] The words expressing position and direction described within the present invention are all with reference to the instrument operator. The end close to the instrument operator is the proximal end, and the end far from the instrument operator is the distal end; the axial direction in the present invention refers to the length direction of the component. In addition, the terms first, second, etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0036] The present invention provides a tubular implant component 10 and an implant system having the tubular implant component 10. The implant system includes an introducer, a delivery guide wire, and the tubular implant component 10 located at the distal end of the delivery guide wire. The tubular implant component 10 and the distal segment of the delivery guide wire are located within the introducer. At this time, the tubular implant component 10 is in a compressed state. During use, the tubular implant component 10 and the delivery guide wire are pushed through the introducer into a microcatheter that has been advanced to the distal position. Then, the delivery guide wire is pushed distally to drive the tubular implant component 10 to be delivered along the lumen of the microcatheter to the lesion site. Next, the microcatheter is withdrawn to release the tubular implant component 10 at the lesion site. At this time, the tubular implant component 10 switches to the expanded state.

[0037] Specifically, when the lesion site is an aneurysm in a parent artery, the tubular implant component 10 is released at the aneurysm in the parent artery. The tubular implant component 10 in the expanded state separates the aneurysm from the parent artery, reducing the blood flow into the aneurysm, causing the blood flow in the aneurysm cavity to stagnate or significantly slow down, accelerating thrombus formation in the aneurysm and endothelialization at the aneurysm neck, achieving the effect of repairing the parent artery.

[0038] In the implant system of the present invention, except for the tubular implant component 10, other structures such as the delivery guide wire and the introducer can all follow the corresponding structures in the existing implant system, and thus will not be elaborated here.

[0039] Please refer to Figures 2 to 6As shown, the tubular implant member 10 in the first embodiment of the present invention includes a main body section 1 and a developing member 2 connected to the main body section 1. When the tubular implant member 10 is in a compressed state, the main body section 1 is in a compressed state; when the tubular implant member 10 is in an expanded state, the main body section 1 is in an expanded state.

[0040] Specifically, as shown in combination with Figures 3 to 6 shown, the main body section 1 includes at least one support unit 11 that surrounds the central axis of the main body section 1 and extends continuously in a spiral manner. The support unit 11 is wavy along its extending direction, and the support unit 11 includes a plurality of support rods 111 arranged along its extending direction, and a connecting portion 112 that connects two adjacent support rods 111 to form a wave crest and a wave trough.

[0041] Furthermore, the connecting portion 112 includes two first connecting segments 1121 respectively connected to the ends of two adjacent support rods 111, and a second connecting segment 1122 that connects the two first connecting segments 1121. At least one first connecting segment 1121 extends obliquely from the second connecting segment 1122 towards the support rod 111 connected to the other first connecting segment 1121. Thus, as shown in combination with Figure 6 shown, when the tubular implant member 10 is in a compressed state, the connecting portions 112 adjacent in the circumferential direction of the main body section 1 are arranged in an axial offset manner, and at the same time, the ends of two adjacent support rods 111 close to the connecting portion 112 can also be in contact with each other, enabling the adjacent support rods 111 to be parallel and in contact with each other. The connecting portions 112 that avoid occupying space are located on the same circumference. At the same time, the support rods 111 are in contact with each other. On the one hand, it can improve the space utilization rate, and then can improve the metal coverage rate and the mesh density, realizing an effective blood flow guiding effect. Moreover, the tubular implant member 10 can be delivered through a microcatheter with a smaller inner diameter, such as a microcatheter with an inner diameter of 0.013 in to 0.035 in; on the other hand, it can make the tubular implant member 10 have a smaller shortening rate. Specifically, the shortening rate is not higher than 20%, and at the same time, it makes the tubular implant member 10 open more reliably.

[0042] As shown in combination with Figure 5 shown, it should be noted that in the present invention, in the expanded state, the contour formed by enclosing two adjacent support rods 111 and the dotted line is defined as a mesh, and the number of meshes per unit area (1 mm 2 ) is the mesh density.

[0043] In a specific embodiment, the main body section 1 has a shape memory function. When the tubular implant member 10 is in a compressed state, the connecting portion 112 and the support rods 111 both undergo certain deformations. The two first connecting segments 1121 approach each other. At this time, there is a tendency for the two support rods 111 connected to one connecting portion 112 to move away from each other. Thus, after the tubular implant member 10 is free from radial restraint force, the tubular implant member 10 can expand to an inflated state, realizing self-expansion of the tubular implant member 10. At this time, in the direction away from the connecting portion 112, the distance between the two support rods 111 connected to this connecting portion 112 gradually increases. Of course, this is not the only limit.

[0044] In a specific embodiment, the main body section 1 is cut and formed from a pipe material with a shape memory function, such as nickel-titanium alloy. Of course, this is not the only limit. In other embodiments, the main body section 1 can also be formed by 3D printing, etching, etc.

[0045] Furthermore, the two connecting portions 112 connected to the opposite ends of one support rod 111 are centrosymmetric about the center of this support rod 111, simplifying the structure of the support unit 11.

[0046] Combined with Figure 6 As shown, in this embodiment, when the tubular implant member 10 is in a compressed state, the support rods 111 are straight rods; one of the two first connecting segments 1121 extends obliquely from the second connecting segment 1122 towards the support rod 111 connected to the other first connecting segment 1121, and the other extends obliquely from the second connecting segment 1122 towards the support rod 111 connected to it. At this time, when the tubular implant member 10 is in an inflated state, the connecting portion 112 and the two support rods 111 connected to this connecting portion 112 form a shape similar to an R shape. Thus, when the tubular implant member 10 is in a compressed state, the support rods 111 corresponding to the two connecting portions 112 adjacent in the circumferential direction of the main body section 1 can be parallel and abutted against each other, which can further improve the space utilization rate and further reduce the diameter of the tubular implant member 10 in the compressed state, so that the tubular implant member 10 can be delivered through a microcatheter with a smaller inner diameter.

[0047] Furthermore, in this embodiment, combined with Figure 6As shown, when the tubular implant member 10 is in a compressed state, the first connecting segments 1121 of two connecting portions 112 adjacent to each other in the circumferential direction of the main body segment 1 are in contact with each other. On the one hand, it can further improve the space utilization rate, and then can improve the metal coverage rate and the mesh density, realizing an effective blood flow guiding effect; on the other hand, the length difference between two support rods 111 connected to the same connecting portion 112 is small, and the deformation performance difference between the two support rods 111 is also small. Therefore, when the tubular implant member 10 switches between the compressed state and the expanded state, the deformation is relatively uniform and the force is also relatively uniform, improving the stability of the tubular implant member 10. Of course, it is not limited thereto, and two adjacent connecting portions 112 along the circumferential direction of the main body segment 1 may also be set not to be in contact and fit, such as Figure 7 As shown, in the second embodiment of the present invention, the distance between two adjacent connecting portions 112 along the axial direction of the main body segment 1 in the circumferential direction of the main body segment 1 is large, that is, two adjacent connecting portions 112 along the circumferential direction of the main body segment 1 are not in contact and fit. It can be understood that for two adjacent connecting portions 112 along the circumferential direction of the main body segment 1, a part of one support unit 11 may also be set to be in contact and fit, and the other part is not in contact and fit, which can be set according to specific requirements.

[0048] Specifically, as Figure 6 As shown, after the tubular implant member 10 is laid out flat, the included angle α between the outer tangent line L2 of the connecting portions 112 adjacent to each other in the circumferential direction of the tubular implant member 10 in the support unit 11 and the central axis L1 of the tubular main body segment 1 is defined, wherein the direction of L2 is the extending direction of the support unit 11.

[0049] Further, when the tubular implant member 10 is in a compressed state, the included angle α is 30° to 60°. Preferably 40° to 50°. The distance between two adjacent connecting portions 112 along the circumferential direction of the tubular implant member 10 is small, which can further improve the space utilization rate, and then can improve the metal coverage rate and the mesh density.

[0050] Further, when the tubular implant member 10 is in an expanded state, the included angle α is 60° to 88°, preferably 70° to 85°. It can be known that the expanded state of the tubular implant member 10 is related to the diameter of the implanted blood vessel, that is, the larger the diameter of the implanted blood vessel, the larger the diameter of the tubular implant member 10 in the expanded state, and the corresponding included angle α is larger.

[0051] Further, the first connecting segment 1121 is arc-shaped, or straight-shaped, or a combination of arc-shaped and straight-shaped. Such as Figures 4 to 6As shown, in the first embodiment of the present invention, the connecting portion 112 is arc-shaped as a whole, that is, both the first connecting segment 1121 and the second connecting segment 1122 are arc-shaped. As Figure 8 As shown, this is the third embodiment of the present invention. The difference between the tubular implant member in the third embodiment of the present invention and the tubular implant member 10 in the first embodiment is that: the first connecting segment 1121a in the connecting portion 112a is a combination of an arc shape and a straight shape, and the second connecting segment 1122a is arc-shaped. Specifically, the first connecting segment 1121a includes an arc segment connected to the support rod 111 and a straight segment connecting the arc segment and the second connecting segment 1122a. Of course, it is not limited thereto. It can be known that the shape of the first connecting segment 1121 / the connecting portion 112 can be set according to specific requirements. At the same time, the shapes of the connecting portions in the support unit 11 are not limited to being the same, and can be a combination of connecting portions with different shapes. For example, some connecting portions in the support unit 11 are the connecting portion 112 in the above-mentioned first embodiment, and another part of the connecting portion is the connecting portion 112a in the above-mentioned third embodiment.

[0052] Please refer Figure 9 As shown, this is a partial structural schematic diagram of the tubular implant member 10b in the fourth embodiment of the present invention. The difference between the fourth embodiment of the present invention and the first embodiment is that: the support rod 111b is wavy. On the one hand, the wavy support rod 111b itself has relatively dispersed stress, which can reduce the conveying resistance and has relatively good fatigue resistance; on the other hand, the wavy support rod 111b can increase the blood flow resistance and has a good effect of blocking blood from flowing into the aneurysm.

[0053] When the support rod 111b is wavy, when the tubular implant member 10b is in a compressed state, the adjacent support rods 111b are in concave-convex fit and abut against each other.

[0054] It can be known that when the support rod 111b is wavy, along the direction away from the second connecting segment, the two first connecting segments 1121b can be set to extend obliquely towards each other, that is, each first connecting segment 1121b is set to extend obliquely from the second connecting segment towards the support rod 111b connected to the other first connecting segment 1121b. At this time, a concave portion structure for receiving the connecting portion 112b can be recessed at the position on the support rod 111b corresponding to the connecting portion 112b.

[0055] Except for the above differences, the fourth embodiment of the present invention is the same as the first embodiment, and will not be elaborated here.

[0056] Furthermore, the number s of the support units 11 is 1 to 9. Preferably, the number s of the support units 11 is 2 to 6. CombiningFigures 2 to 3 As shown in the figure, in the first embodiment of the present invention, the number of the support units 11 is 3, that is, the main body section 1 is a multi-helical structure, which can achieve a good dislocation effect. In the compressed state, the adjacent connecting parts 112 are dislocated, and the adjacent support rods 111 can be abutted against each other. Moreover, the two adjacent connecting parts 112 adjacent to each other in the circumferential direction of the tubular implant member 10 are abutted against each other, which can further improve the space utilization rate, and then can improve the metal coverage rate and the mesh density.

[0057] Further, the number of the support rods 111 around the central axis of the main body section 1 in one circle of the support unit 11 is 30 - 160, that is, the number of the support rods 111 in one turn of the helical support unit 11 is 30 - 160, which can improve the metal coverage rate and the mesh density.

[0058] It should be noted that a section between two adjacent and corresponding points in the axial direction of the main body section 1 in the support unit forms one turn.

[0059] Specifically, the connecting part 112 and the support rod 111 are integrally cut and formed to improve the stability of the tubular implant member 10.

[0060] Further, as shown in Figure 4 the figure, the main body section 1 further includes a plurality of connecting rods 12. The connecting rods 12 are fixedly connected to the adjacent support units 11 or the axially adjacent parts within the support unit 11 along the axial direction of the main body section 1, so as to improve the integrity and stability of the tubular implant member 10.

[0061] It can be known that when the main body section 1 includes one support unit 11, the connecting rod 12 is used to connect the adjacent parallel sections in the support unit 11, that is, the connecting rod 12 is used to connect the adjacent turns in the support unit 11. When the main body section 1 includes a plurality of support units 11, that is, when the main body section 1 is a multi-helical structure, the connecting rod 12 is used to connect the adjacent support units 11, that is, the connecting rod 12 is used to connect the adjacent turns in the adjacent support units 11.

[0062] Specifically, the connecting rod 12 can be arranged to connect the adjacent support units 11 or the adjacent parts within the support unit 11, the adjacent peaks and valleys, or can be arranged to connect the adjacent two peaks or the adjacent two valleys.

[0063] Further, two adjacent connecting rods 12 axially adjacent to the main body section 1 are arranged in a staggered manner, further improving the flexibility / wall adhesion and delivery performance of the tubular implant member 10. Further, adjacent turns are connected by a plurality of connecting rods 12, and a plurality of the connecting portions 112 are spaced between two adjacent connecting rods 12, reducing the connection between adjacent turns to improve the flexibility and delivery performance of the tubular implant member 10.

[0064] In a specific embodiment, the connecting rods around the central axis of the main body section 1 are evenly arranged, that is, the plurality of connecting rods between adjacent turns are evenly arranged. Specifically, the number of wave crests / troughs around the central axis of the main body section in the support unit is m, the number of connecting rods around the central axis of the main body section in one turn is n, and the number of support units is s, where N1×(m÷n) = N2×s, N1 and N2 are both natural numbers, and N1 < n. Further improving the flexibility / wall adhesion and delivery performance of the tubular implant member 10. Of course, it is not limited thereto.

[0065] Further, in combination with Figure 2 As shown, in the first embodiment of the present invention, the main body section 1 is a multi-helical structure including a plurality of the support units 11; the ends of the plurality of support units 11 are located on the same circumference around the central axis of the main body section 1. The developer 2 is provided at the ends of the support units 11 so that the operator can accurately locate the position of the tubular implant member 10 in the human blood vessel.

[0066] Please refer to Figure 10 As shown, for the tubular implant member 10c in the fifth embodiment of the present invention, the difference between the tubular implant member 10c in the fifth embodiment of the present invention and the tubular implant member 10 in the first embodiment of the present invention is that: the tubular implant member 10c further includes end sections 3 connected to opposite ends of the main body section 1; the end sections 3 include multiple turns of corrugated rings 31; the wavelength of the corrugated ring 31 in the outer turn away from the main body section 1 is greater than the wavelength of the corrugated ring 31 in the inner turn close to the main body section 1 among two adjacent turns of corrugated rings 31. To reduce the metal coverage rate and mesh density of the end section 3 serving as an anchoring function in the tubular implant member 10c and avoid blocking the branches in the blood vessel at both ends of the tubular implant member 10c.

[0067] Further, in an embodiment where the main body section 1 is a multi-helical structure including a plurality of the support units 11, and the ends of the plurality of the support units 11 are located on the same circumference around the central axis of the main body section 1, the tubular implant member 10 further includes a transition corrugated ring 4 connected between the main body section 1 and the end section 3. The transition corrugated ring 4 includes a plurality of corrugated segments 41 corresponding to the plurality of the support units 11 one by one, and the plurality of the corrugated segments 41 are connected end to end to form the transition corrugated ring 4. The wave crests of the corrugated segments 41 far from the main body section 1 are located on the same circumference around the central axis of the main body section 1, and the arrangement direction of the wave troughs of the corrugated segments 41 close to the main body section 1 is the same as the extending direction of the support units 11.

[0068] Further, the developer 2 is connected to one circle of the corrugated rings 31 in the end section 3 far from the main body section 1, that is, the developer 2 is connected to the corrugated rings 31 at the proximal end and the distal end of the tubular implant member 10c, so that an operator can accurately locate the position of the tubular implant member 10c in a human blood vessel. Specifically, as Figure 10 shown, in the fifth embodiment of the present invention, the developer 2 can be arranged to be directly connected to the end of the corrugated ring 31. Of course, this is not limited thereto. As Figure 11 shown, in the sixth embodiment of the present invention, the developer 2 can also be arranged to be sleeved on the corrugated rings 31 at the proximal end and the distal end.

[0069] In summary, for the tubular implant member 10 in the present invention, by setting the connecting portion 112 as a wave crest or a wave trough such that at least one first connecting segment 1121 extends obliquely from the second connecting segment towards the support rod 111 connected to another first connecting segment 1121, when the tubular implant member 10 is in a compressed state, the connecting portions 112 adjacent in the circumferential direction of the tubular implant member 10 are misaligned, and the adjacent support rods 111 in each support unit 11 can be parallel and abutted against each other. On the one hand, the space utilization rate can be improved, and further, the metal coverage rate and the mesh density can be increased to achieve an effective blood flow guiding effect, and the tubular implant member 10 can be delivered through a microcatheter with a smaller inner diameter. On the other hand, the tubular implant member 10 can have a smaller shortening rate and is more reliable to open.

[0070] It should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0071] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation manners of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalent implementation manners or modifications made without departing from the technical spirit of the present invention shall be included within the protection scope of the present invention.

Claims

1. A tubular implant member, comprising a main body section, the main body section including at least one support unit that surrounds the central axis of the main body section and extends continuously in a spiral manner, the support unit being wavy along its extending direction, the support unit including a plurality of support rods arranged along its extending direction, and connecting portions that connect adjacent two support rods to form wave crests and wave troughs; characterized in that: The connecting part includes two first connecting segments respectively connected to the ends of two adjacent support rods, and a second connecting segment connecting the two first connecting segments. At least one first connecting segment extends obliquely from the second connecting segment towards the support rod connected to the other first connecting segment.

2. The tubular implant member according to claim 1, wherein: When the tubular implant member is in a compressed state, the support rods are straight rods; one of the two first connecting segments extends obliquely from the second connecting segment towards the support rod connected to the other first connecting segment, and the other extends obliquely from the second connecting segment towards the support rod connected to it.

3. The tubular implant member according to claim 2, wherein: When the tubular implant member is in a compressed state, the first connecting segments of two adjacent connecting parts in the circumferential direction of the main body segment are in contact with each other.

4. The tubular implant member according to claim 1, wherein: The support rods are wavy.

5. The tubular implant member according to claim 4, wherein: In the direction away from the second connecting segment, the two first connecting segments extend obliquely towards each other.

6. The tubular implant member according to claim 2 or 4, wherein: The two connecting parts connected to the opposite ends of one support rod are centrosymmetric about the center of the support rod.

7. The tubular implant member according to claim 1, wherein: The first connecting segment is arc-shaped, or straight-shaped, or a combination of arc-shaped and straight-shaped.

8. The tubular implant member according to claim 1, wherein: The main body segment further includes a plurality of connecting rods, and the connecting rods are fixedly connected to adjacent support units or axially adjacent parts within the support units along the axial direction of the main body segment.

9. The tubular implant member according to claim 8, wherein: The connecting rods adjacent to each other along the axial direction of the main body segment are arranged in a staggered manner.

10. The tubular implant member according to claim 9, wherein: The connecting rods around the central axis of the main body segment for one circle are evenly arranged; the number of wave crests / troughs around the central axis of the main body segment in the support unit is m, the number of connecting rods around the central axis of the main body segment for one circle is n, and the number of support units is s, where N1×(m÷n) = N2×s, both N1 and N2 are natural numbers, and N1 < n.

11. The tubular implant member according to claim 1, wherein: When the tubular implant member is in a compressed state, the included angle between the extending direction of the support unit and the central axis of the main body segment is 30° - 60°; and / or the number of support units is 1 - 9.

12. The tubular implant member according to claim 1, wherein: The number of support rods around the central axis of the main body segment in the support unit is 30 - 160.

13. The tubular implant member according to claim 1, wherein: The main body segment is a multi-helical structure including a plurality of support units; the ends of the plurality of support units are located on the same circumference around the central axis of the main body segment; the tubular implant member further includes a developer connected to the ends of the support units.

14. The tubular implant member according to claim 1, wherein: The tubular implant member further includes end sections connected to the opposite ends of the main body segment; the end sections include multiple corrugated rings; the wavelength of the corrugated ring farther from the main body segment in two adjacent corrugated rings is greater than the wavelength of the corrugated ring closer to the main body segment.

15. The tubular implant member according to claim 14, wherein: The main body segment is a multi-helical structure including a plurality of support units; the ends of the plurality of support units are located on the same circumference around the central axis of the main body segment; the tubular implant member further includes a transition corrugated ring connected between the main body segment and the end sections, the transition corrugated ring includes a plurality of corrugated segments corresponding to the plurality of support units one by one, the wave crests of the corrugated segments farther from the main body segment are located on the same circumference around the central axis of the main body segment, and the arrangement direction of the wave troughs of the corrugated segments closer to the main body segment is the same as the extending direction of the support unit.

16. The tubular implant member according to claim 14, wherein: The tubular implant member further includes a developer connected to a circle of the corrugated rings in the end section away from the main body section.

17. An implantation system for a tubular implant component, characterized in that: The implant system includes the tubular implant member according to any one of claims 1 to 16.

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