Valve prostheses and stents

Abstract

This invention relates to a valve prosthesis and a stent, the stent comprising a first stent. The first stent includes two first rod groups, and a first axial rod and a second axial rod connecting the two first rod groups and arranged along the axial direction of the stent. Each first rod group includes a plurality of first rods connected end-to-end and arranged in a W-shape. The first crests of the two first rod groups are arranged opposite each other, and the first troughs are arranged opposite each other. At least one or more of the two oppositely arranged first crests are connected by one or more first axial rods, and the two oppositely arranged first troughs are connected by one or more second axial rods. In this way, the arrangement density of the axial rods can be increased, thereby improving the radial support strength, so that it can be stably fixed at the location of the original valve; in addition, the enclosed quadrilateral structure can be easily bent under stress, that is, it will not affect the normal storage and folding of the stent.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a valve prosthesis and stent. Background Technology

[0002] Heart valves (such as the aortic, pulmonary, tricuspid, and mitral valves) can suffer from various diseases that lead to heart dysfunction. A diseased heart valve (also known as a primary valve) may be narrowed and / or ineffective. A narrowed valve cannot open sufficiently to allow enough blood to flow. An ineffective valve cannot close completely, causing blood to flow backwards in more ways than a normally functioning valve. Furthermore, the annulus and leaflets of the primary valve may narrow and calcify. Therefore, valve prostheses have been developed to replace the diseased primary valve by implanting a prosthesis in the location of the primary valve, holding the valve stent securely within the narrowed annulus, which may have calcified leaflets.

[0003] In traditional techniques, valve stents have multiple mesh openings, primarily in symmetrical hexagonal and rhomboid shapes. While a hexagonal stent design increases the mesh size compared to a rhomboid design, facilitating percutaneous coronary intervention, the addition of axial struts reduces the stent's radial support strength. This reduced radial support, especially when the patient's native valve is long and severely calcified, may result in the stent failing to open or failing to support the native valve after opening. Summary of the Invention

[0004] This invention provides a valve prosthesis and stent to solve one or more technical problems in the prior art.

[0005] The technical solution is as follows: A support, comprising: a first support, the first support including two first rod groups, and a first axial rod and a second axial rod connecting the two first rod groups and arranged along the axial direction of the support; the first rod group includes a plurality of first rods connected end to end and arranged in a W shape; one end of the first rod relative to the proximal end of the support is defined as a first crest, and the other end of the first rod is defined as a first trough; the first crests of the two first rod groups are arranged opposite to each other, and the first troughs are arranged opposite to each other; the two oppositely arranged first crests are connected by a first axial rod; the two oppositely arranged first troughs are connected by a second axial rod; there are at least three first axial rods, and / or at least three second axial rods.

[0006] In one embodiment, the sum of the number of the first axial rod and the number of the second axial rod is at least six.

[0007] In one embodiment, in the first bracket, at least one set of two opposing first rods are connected at one end to a first axial rod and at the other end to a second axial rod.

[0008] In one embodiment, in the first rod group, each of at least one pair of adjacent first rods is connected to a first axial rod at one end and to a second axial rod at the other end.

[0009] In one embodiment, there are at least three first axial rods, and at least three of the first axial rods are provided with mounting portions for fixing and installing the valve.

[0010] In one embodiment, the mounting portions are arranged at equal intervals around the central axis of the bracket.

[0011] In one embodiment, the width of the first trough is defined as D1, and the width of the remaining portion of the first rod is defined as D2, where D1 ≤ D2.

[0012] In one embodiment, for the first rod group that is relatively close to the proximal end of the two first rod groups, the end of the second axial rod is connected to the first trough of the two first rods to form a first node; the first node has a notch corresponding to the first trough and the end of the second axial rod.

[0013] In one embodiment, the notch is an arc-shaped opening.

[0014] In one embodiment, the end of the second axial rod is connected to the first trough of the two first rods to form a first node; a second node is also provided on the first trough.

[0015] In one embodiment, the distance between the first node and the second node is S, where 1mm ≤ S ≤ 5mm.

[0016] In one embodiment, the stent further includes a second stent connected to the first stent, the second stent being located at the proximal end of the stent.

[0017] In one embodiment, the second support includes at least two second rod groups that are sequentially connected along the axial direction of the support.

[0018] In one embodiment, the first rods of the first bracket are connected to form an integrated structure; the first bracket and the second bracket are an integrated structure; the first bracket and the second bracket are made of cobalt-chromium alloy, nickel-titanium alloy, or stainless steel.

[0019] A valve prosthesis, the valve prosthesis comprising the aforementioned support and at least two leaflets disposed on the support.

[0020] The aforementioned valve prosthesis and stent, due to the opposing first peaks and troughs of the two first strut groups, are respectively connected by a first axial strut and a second axial strut. Thus, for the two opposing first struts, when one end is connected to the first axial strut, the other end can also be connected to the second axial strut. The first axial strut, the second axial strut, and the two opposing first struts together form a quadrilateral structure. This, on the one hand, increases the density of the axial struts compared to traditional stents of the same size, thereby improving radial support strength and enabling stable fixation to the original valve location or within the blood vessel; on the other hand, the quadrilateral structure formed facilitates bending under stress, thus not affecting the normal folding and storage of the stent. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a bracket according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the unfolded structure of the support according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the unfolded structure of the bracket according to another embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the unfolded structure of the bracket according to another embodiment of the present invention;

[0027] Figure 5 for Figure 2An enlarged structural schematic diagram of one embodiment at point A;

[0028] Figure 6 for Figure 2 An enlarged structural diagram of another embodiment at point A;

[0029] Figure 7 for Figure 2 An enlarged structural schematic diagram of another embodiment at point A;

[0030] Figure 8 for Figure 2 An enlarged structural diagram of another embodiment at point A.

[0031] 10. First support; 11. First rod assembly; 111. First rod body; 1111. First crest; 1112. First trough; 11121. Second node; 12. First axial rod; 121. Mounting part; 13. Second axial rod; 14. Quadrilateral structure; 15. Hexagonal structure; 16. Octagonal structure; 17. First node; 171. Notch;

[0032] 20. Second support; 21. Second rod assembly; 211. Second rod body; 2111. Second crest; 2112. Second trough;

[0033] 101. Distal end; 102. Proximal end. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of a bracket according to an embodiment of the present invention is shown. Figure 2A schematic diagram of the unfolded structure of a support according to an embodiment of the present invention is shown. An embodiment of the present invention provides a support including a first support 10. The first support 10 includes two first rod groups 11, and a first axial rod 12 and a second axial rod 13 connecting the two first rod groups 11 and arranged along the axial direction of the support. Each first rod group 11 includes a plurality of first rods 111 connected end-to-end and arranged in a W-shape. One end of a first rod 111, relatively away from the proximal end of the support, is defined as a first crest 1111, and the other end of the first rod 111 is defined as a first trough 1112. The first crests 1111 and the first troughs 1112 of the two first rod groups 11 are arranged opposite each other. The two oppositely arranged first crests 1111 are connected by a first axial rod 12, and the two oppositely arranged first troughs 1112 are connected by a second axial rod 13. There are at least three first axial rods 12, and / or at least three second axial rods 13.

[0036] It should be noted that when there are three first axial rods 12, it means that there are three oppositely arranged two first crests 1111 connected by one first axial rod 12. Similarly, when there are three second axial rods 13, it means that there are three oppositely arranged two first troughs 1112 connected by one second axial rod 13.

[0037] It should also be noted that the specific size of the stent is not limited here. It can be flexibly adjusted and set according to the actual size of the installation environment, as long as it can be stably fixed in the installation environment. The installation environment can be various arterial and venous vessels, such as the location of the native valve.

[0038] The aforementioned stent, in which the first crests 1111 and the first troughs 1112 of the two first rod groups 11 are arranged opposite each other, and are respectively connected to the second axial rod 13 via the first axial rod 12. Thus, for the two opposing first rods 111, when one end is connected to the first axial rod 12, the other end can also be connected to the second axial rod 13. In this way, the first axial rod 12, the second axial rod 13, and the two opposing first rods 111 enclose a quadrilateral structure 14. Therefore, on the one hand, compared with the traditional stent of the same volume size, the arrangement density of the axial rods can be increased, thereby improving the radial support strength, so that it can be stably fixed at the location of the original valve or stably fixed in the blood vessel; on the other hand, the quadrilateral structure 14 formed by the enclosure can be easily bent under force, that is, it will not affect the normal storage and folding of the stent.

[0039] It should be noted that blood enters from the proximal end 102 (i.e., the inflow end) of the stent and exits through the distal end 101 (i.e., the outflow end). Therefore, for example, after a stent is implanted at the location of the aortic valve, the proximal end 102 faces the left ventricle and the distal end 101 faces the ascending aorta.

[0040] It should be noted that the axial direction of the support is as follows: Figure 1 The direction indicated by arrow P1 shown is radial, meaning as follows: Figure 1 The direction indicated by arrow P2 shown.

[0041] It should be noted that the two oppositely arranged first crests 1111 connected by the first axial rod 12 should be understood as follows: one end of the first axial rod 12 is connected to one of the two oppositely arranged first crests 1111, and the other end is connected to the other.

[0042] It should be noted that, since the first crest portion 1111 of the two first rod groups 11 is arranged opposite to the first crest portion 1111, and the first trough portion 1112 is arranged opposite to the first trough portion 1112, the number of first rods 111 of the two first rod groups 11 remains the same, and their positions are respectively arranged correspondingly.

[0043] It should be noted that the stents in this embodiment include, but are not limited to, valve stents, coronary artery stents, intervascular stents in the brain, renal artery stents, and peripheral limb artery stents. This embodiment will specifically use a valve stent as an example for further explanation.

[0044] In one embodiment, the sum of the number of the first axial rod 12 and the second axial rod 13 is at least six.

[0045] Please see Figure 2In one embodiment, in the first stent 10, at least one set of two opposing first rods 111 are connected at one end to a first axial rod 12 and at the other end to a second axial rod 13. The opposing first rods 111, the first axial rod 12, and the second axial rod 13 enclose a quadrilateral structure 14. When the structural dimensions of the two first rod sets 11 are consistent and they are arranged parallel to each other, the quadrilateral structure 14 formed is, for example, a parallelogram structure 14. Thus, on the one hand, compared with a traditional valve stent of the same volume, the arrangement density of the axial rods can be increased, thereby improving the radial support strength and enabling stable fixation at the location of the native valve; on the other hand, the quadrilateral structure 14 formed is easy to bend under stress, i.e., it does not affect normal storage and folding. In one embodiment, there are multiple quadrilateral structures 14. Specifically, multiple quadrilateral structures 14 are evenly arranged. Thus, when the quadrilateral structures are evenly arranged, radial support strength can be guaranteed, while stable fixation at the location of the native valve can be achieved.

[0046] Please see Figures 2 to 4 , Figures 2 to 4 The diagrams show the unfolded structures of the brackets according to three different embodiments. It should be noted that in the first bracket 10, there may be two, three, four, five, six, eight or other groups of two first rods 111 arranged opposite each other. One end of each rod is connected to a first axial rod 12, and the other end is connected to a second axial rod 13. Accordingly, the first bracket 10 will form two, three, four, five, six, eight or other numbers of quadrilateral structures 14.

[0047] Please see Figures 2 to 4 It should be noted that in the first stent 10, at least one end of two opposing first rods 111 may not be connected to the first axial rod 12 or the second axial rod 13, that is, the first axial rod 12 or the second axial rod 13 is missing. The resulting mesh can be, for example, a hexagonal structure 15 (the hexagonal structure 15 is missing one axial rod, in other words, in the four opposing first rods 111 in the hexagonal structure 15, one pair of crests or troughs is not equipped with an axial rod, while the other two pairs of crests or troughs are equipped with axial rods), or an octagonal structure 16 (the octagonal structure 16 is missing two axial rods accordingly), or a decagonal structure (the decagonal structure is missing three axial rods accordingly). The resulting mesh has a larger opening size, which is beneficial for percutaneous coronary intervention.

[0048] It should be noted that, in this embodiment, the quadrilateral structure 14 refers to a frame structure formed by connecting four rods (for example, two first rods 111, a first axial rod 12, and a second axial rod 13) end to end in sequence. In this embodiment, the hexagonal structure 15 refers to a frame structure formed by connecting six rods (for example, four first rods 111 and two first axial rods 12 or two second axial rods 13) end to end in sequence.

[0049] Please see Figure 3 and Figure 4 In one embodiment, in the first bracket 10, at least two sets of two opposing first rods 111 are each connected to a first axial rod 12 at one end and a second axial rod 13 at the other end.

[0050] Please see Figure 3 and Figure 4 In one embodiment, in the first rod group 11, each of at least two adjacent first rods 111 is connected to a first axial rod 12 at one end and a second axial rod 13 at the other end. In other words, there are at least two quadrilateral structures 14, which are arranged adjacent to each other. When two adjacent quadrilateral structures 14 are combined, they act as axial support pillars, which can relatively increase the arrangement density of the axial rods, thereby improving the radial support strength and enabling them to be firmly fixed at the location of the original valve.

[0051] See Figures 2 to 4 It should be noted that for two adjacent first rods 111, their two ends are connected together and share a first axial rod 12 or a second axial rod 13. That is, two quadrilateral structures 14 being adjacent means that the two quadrilateral structures 14 are next to each other; in other words, the two quadrilateral structures 14 have a common side, which is the first axial rod 12 or the second axial rod 13.

[0052] As an alternative, when there are three quadrilateral structures 14, the three quadrilateral structures 14 can be arranged adjacent to each other in sequence, or two of the quadrilateral structures 14 can be arranged adjacent to each other and separated from the other quadrilateral structure 14.

[0053] As an alternative, when there are four quadrilateral structures 14, there can be only two quadrilateral structures 14 arranged adjacent to each other, or two quadrilateral structures 14 arranged adjacent to each other and the other two quadrilateral structures 14 arranged adjacent to each other, or three quadrilateral structures 14 arranged adjacent to each other in sequence with a gap between them and another quadrilateral structure 14, or four quadrilateral structures 14 arranged adjacent to each other in sequence.

[0054] When there are five, six or more quadrilateral structures 14, the setup method is similar and will not be repeated.

[0055] See Figures 2 to 4 In one embodiment, there are at least three first axial rods 12, and at least three of the first axial rods 12 are provided with mounting portions 121 for fixing and mounting the valve (not shown in the figure).

[0056] See Figures 2 to 4 In one embodiment, all mounting portions 121 are arranged at equal intervals around the central axis of the support. Correspondingly, the first axial rods 12, on which the mounting portions 121 are provided, are arranged at equal intervals around the central axis of the support. Thus, with adjacent first axial rods 12 spaced at 120° intervals, stable valve installation can be achieved.

[0057] Generally, for the first link group 11 that is relatively closer to the proximal end 102 in the two first link groups 11, since the first trough portion 1112 of the two first links 111 is not only connected to the end of the second axial link 13, it is also connected to other structures at the same time, for example, Figure 3 and Figure 5 The diagram also shows two second rods 211 connected to the second support 20, forming a 5-rod common node configuration. Due to the relatively large number of rods, it will be more difficult to bend and deform the part where the first trough 1112 is located. Bending will be more difficult and complex, and the bending position will be too high (i.e., relatively far from the near end). The excessively high bending position will make it impossible to fully utilize the gap between the first trough 1112 of the two first rods 111, resulting in a relatively large external dimension of the support after collapse.

[0058] See Figure 2 , Figures 5 to 8 , Figures 5 to 8 They are shown respectively Figure 2 Enlarged structural schematic diagrams of four different embodiments at point A. In one embodiment, the width of the first trough 1112 (i.e., the minimum distance between two opposite faces of the first trough 1112) is defined as D1, and the width of the remaining parts of the first rod 111 (i.e., the distance between two opposite faces of the first rod 111) is defined as D2, where D1 ≤ D2. Thus, when the width D1 of the first trough 1112 (i.e., the root of the first rod) is less than that of the remaining parts of the first rod 111 (e.g., ... Figure 6 As shown), the first trough portion 1112 is relatively thin, making it prone to bending under stress. This reduces the bending point, resulting in a relatively smaller overall size of the support after collapse. Furthermore, when the width D1 of the first trough portion 1112 is equal to the width D2 of the remaining parts of the first rod 111 (e.g., ...), Figure 5As shown in the figure, the width of the first rod 111 remains constant along its length, which also ensures that the support will bend when subjected to force.

[0059] Of course, as an alternative, the width D1 of the first trough 1112 can also be designed to be slightly larger than the width D2 of the rest of the first rod 111, so that the gap between the first trough 1112 of the two first rods 111 is increased, or the gap between the first trough 1112 and the second axial rod 13 is increased, which can also ensure that the support bends when under stress.

[0060] See Figure 7 In one embodiment, for the first rod group 11 that is relatively close to the proximal end 102 in the two first rod groups 11, the end of the second axial rod 13 is connected to the first trough portion 1112 of the two first rod bodies 111 to form a first node portion 17. The first node portion 17 is provided with a notch 171 corresponding to the position between the first trough portion 1112 and the end of the second axial rod 13. In this way, by providing a notch 171 on the first node portion 17 corresponding to the position between the end of the first trough portion 1112 and the end of the second axial rod 13, the gap between the first trough portion 1112 and the end of the second axial rod 13 can be increased, thereby ensuring that the support can be easily bent under stress, so that the overall size of the support after collapse is relatively small.

[0061] See Figure 7 In one embodiment, the notch 171 is an arc-shaped opening. Specifically, it includes, but is not limited to, a semi-circular opening and a semi-elliptical opening. In this way, the opening wall of the notch 171 is arc-shaped, so that the first node portion 17 is less prone to fracture defects due to excessive local stress when subjected to force.

[0062] Of course, it should be noted that the notch 171 does not necessarily have to be set as the arc-shaped opening in the above embodiment, but can also be set as a notch 171 of other shapes.

[0063] See Figure 8In one embodiment, the end of the second axial rod 13 is connected to the first trough portions 1112 of the two first rods 111 to form a first node portion 17. A second node portion 11121 is also provided on the first trough portion 1112. Thus, the first node portion 17 is one node, which facilitates bending of the first rod 111 under stress; the second node portion 11121 is the other node, which also facilitates bending of the first rod 111 under stress. Furthermore, the structure formed by the combination of the second axial rod 13 and the two first trough portions 1112 uses a double node instead of a typical single node. This design increases the distance between the bending positions of the two first rods 111 located on both sides of the first axial rod 12, ensuring that the bending of the two first rods 111 located on both sides of the second axial rod 13 does not affect each other, i.e., each has an independent bending space. Furthermore, although the distance between the two first rods 111 on both sides of the first axial rod 12 is relatively increased by the double node compared to the single node, the overall size of the support after collapse can still be further reduced by the more compact bending method.

[0064] See Figure 8 In one embodiment, the distance between the first node 17 and the second node 11121 is S, where 1mm ≤ S ≤ 5mm. This ensures that the distance S is not too small, guaranteeing that the bending of the two first rods 111 located on both sides of the second axial rod 13 does not affect each other, i.e., each has independent bending space; and that the distance S is not too large, ensuring that the distance between the bending positions of the two first rods 111 located on both sides of the first axial rod 12 is not too large and affects the overall dimensions after bending.

[0065] See Figure 2 In one embodiment, the stent further includes a second stent 20 connected to the first stent 10, with the first stent 10 located at the distal end 101 of the stent and the second stent 20 located at the proximal end of the stent. This ensures sufficient radial support strength at the distal end 101 of the stent, allowing it to be securely fixed to the location of the native valve. This prevents the distal end 101 from failing to open the native valve or failing to support it after opening, especially when the native valve is long and severely calcified.

[0066] It should be noted that the specific shape of the second support 20 is not limited here. For example, it can be a support with quadrilateral holes, hexagonal holes or other shaped mesh holes, as long as it can be easily bent when subjected to a preset bending force so that it can be easily stored in the conduit.

[0067] See Figures 2 to 4 In one embodiment, the second support 20 includes at least two second rod groups 21 that are sequentially connected along the axial direction of the support.

[0068] The second rod group 21 can be two, three, four, or other quantities. The specific number can be determined based on the design length of the support in the axial direction. When the axial length of the support needs to be designed to be large, the number of second rod groups 21 can be relatively large; conversely, when the axial length of the support needs to be designed to be small, the number of second rod groups 21 can be relatively small. For example... Figure 4 The two shown.

[0069] Of course, as an alternative, the second support 20 may also consist of only a second rod assembly 21.

[0070] See Figures 2 to 4 Specifically, the second rod group 21 includes multiple second rods 211 connected end to end and arranged in a W-shape. One end of a second rod 211 closer to the distal end 101 is defined as a second crest 2111, and the other end is defined as a second trough 2112. For two adjacent second rod groups 21, the multiple second crests 2111 of one second rod group 21 are respectively connected to the multiple second troughs 2112 of the other second rod group 21. Thus, two adjacent second rod groups 21 are connected to form multiple quadrilateral mesh structures, which are prone to bending under stress.

[0071] See Figure 2 For one of the first rod groups 11 near the proximal end and its adjacent second rod group 21 (the second rod group 21 closest to the distal end 101 among all the second rod groups 21), the plurality of second crests 2111 of the second rod group 21 are respectively connected to the plurality of first troughs 1112 of the first rod group 11. In this way, the second rod group 21 and the first rod group 11 are connected to form a plurality of quadrilateral mesh structures, which are prone to bending under stress.

[0072] See Figure 2 In one embodiment, the first rods 111 of the first stent 10 are connected to form an integrated structure. Optionally, the first stent 10 and the second stent 20 are an integrated structure; the first stent 10 and the second stent 20 are, but are not limited to, cobalt-chromium alloy, nickel-titanium alloy, stainless steel, and may also be made of other medical metallic materials and / or medical non-metallic materials. Thus, using cobalt-chromium alloy, nickel-titanium alloy, or stainless steel causes less damage to human tissue, is durable, has a long service life, and is also less expensive.

[0073] Please see Figure 1 and Figure 2 In one embodiment, a valve prosthesis includes a stent of any of the above embodiments and at least two leaflets disposed on the stent.

[0074] The aforementioned valve prosthesis, in which the first crests 1111 and the first troughs 1112 of the two first rod assemblies 11 are arranged opposite each other, and are respectively connected to the second axial rod 13 via the first axial rod 12. Thus, for the two opposing first rods 111, when one end is connected to the first axial rod 12, the other end can also be connected to the second axial rod 13. In this way, the first axial rod 12, the second axial rod 13, and the two opposing first rods 111 enclose a quadrilateral structure 14. Therefore, on the one hand, compared with a traditional stent of the same volume size, the arrangement density of the axial rods can be increased, thereby improving the radial support strength and enabling it to be stably fixed at the location of the original valve; on the other hand, the quadrilateral structure 14 formed by the enclosure can be easily bent under force, that is, it will not affect the normal storage and folding of the stent.

[0075] It should be noted that the stents in this embodiment include, but are not limited to, self-expanding stents, balloon-expandable stents, and mechanically expandable stents.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0082] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A support, characterized in that, The support includes: A first support includes two first rod groups, and a first axial rod and a second axial rod connecting the two first rod groups and arranged along the axial direction of the support. Each first rod group includes multiple first rods connected end-to-end and arranged in a W-shape. One end of each first rod, relatively far from the proximal end of the support, is defined as a first crest, and the other end is defined as a first trough. The first crests of the two first rod groups are arranged opposite each other, and the first troughs are arranged opposite each other. The two oppositely arranged first crests are connected by a first axial rod. The two oppositely arranged first troughs are connected by a second axial rod. There are at least three first axial rods, and / or at least three second axial rods.

2. The bracket according to claim 1, characterized in that, The sum of the number of the first axial rod and the number of the second axial rod is at least six.

3. The bracket according to claim 1, characterized in that, In the first bracket, at least one pair of oppositely arranged first rods are connected at one end to a first axial rod and at the other end to a second axial rod.

4. The stent according to claim 3, characterized in that, In the first rod group, at least one of the two adjacent first rods is connected to a first axial rod at one end and a second axial rod at the other end.

5. The bracket according to claim 1, characterized in that, There are at least three first axial rods, and at least three of the first axial rods are provided with mounting portions for fixing and installing the valve.

6. The bracket according to claim 5, characterized in that, The mounting parts are arranged at equal intervals around the central axis of the bracket.

7. The bracket according to claim 1, characterized in that, The width of the first trough is defined as D1, and the width of the remaining parts of the first rod is defined as D2, where D1 ≤ D2.

8. The bracket according to claim 1, characterized in that, For the first rod group that is relatively close to the proximal end in the two first rod groups, the end of the second axial rod is connected to the first trough of the two first rods to form a first node; the first node is provided with a notch corresponding to the first trough and the end of the second axial rod.

9. The bracket according to claim 8, characterized in that, The notch is an arc-shaped opening.

10. The stent according to claim 1, characterized in that, The end of the second axial rod is connected to the first trough of the two first rods to form a first node; a second node is also provided on the first trough.

11. The stent according to claim 10, characterized in that, The distance between the first node and the second node is S, where 1mm ≤ S ≤ 5mm.

12. The stent according to claim 1, characterized in that, The stent also includes a second stent connected to the first stent, wherein the first stent is located at the distal end of the stent and the second stent is located at the proximal end of the stent.

13. A valve prosthesis, characterized in that, The valve prosthesis includes a stent as described in any one of claims 1 to 12 and at least two leaflets disposed on the stent.

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