spliced ​​vascular stent

Abstract

This invention discloses a modular vascular stent, comprising a first stent and a second stent. The first stent includes a first main tube, with a first connecting structure at its second end. The second stent includes a second main tube, with a second connecting structure at its first end. The first and second connecting structures are configured to cooperate, allowing the first and second stents to be modularly assembled. This modular vascular stent provides a solution that allows for the selection and combination of the first and second stents based on the patient's condition. After assembly, the stent is implanted into the patient's affected area to treat the disease. Therefore, this modular vascular stent can adapt to the vascular anatomy of different patients or different affected areas, reducing the types and specifications of stents and improving its versatility.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and specifically relates to a spliced ​​vascular stent. Background Technology

[0002] The aorta is the largest artery in the human body, through which all blood is transported. Under the long-term impact of high-pressure blood flow, the aorta is prone to rupture or disease, leading to aortic dissection or aortic aneurysm. Aortic dissection and aortic aneurysm develop rapidly and cause significant damage to the patient's body, making them among the most challenging cardiovascular diseases.

[0003] Currently, there are many stent products on the market for treating aortic dissection or aortic aneurysm. Although they can all treat the corresponding aortic lesions, these stents have the following problems:

[0004] The structure is relatively fixed, making it difficult to adapt to the vascular anatomy of different patients.

[0005] Stents are only used to treat aortic vascular lesions in specific locations, making it difficult to adapt them to different disease areas of patients. Stents are also difficult to standardize, resulting in a wide variety of stent types and specifications with poor versatility. Summary of the Invention

[0006] The purpose of this invention is to provide a spliced ​​vascular stent to improve the shortcomings of existing artificial vascular stent structures, which are difficult to adapt to the vascular anatomy of different patients or different disease areas, and have poor versatility.

[0007] The technical solution is as follows:

[0008] A spliced ​​vascular stent, comprising a first stent and a second stent;

[0009] The first support includes a first main tube, and a first connecting structure is provided at the second end of the first main tube; the second support includes a second main tube, and a second connecting structure is provided at the first end of the second main tube. The first connecting structure and the second connecting structure are configured to cooperate with each other so that the first support and the second support can be spliced ​​together as one unit.

[0010] In one embodiment, the spliced ​​vascular stent further includes a third stent; the third stent includes a third main tube, the first end of the third main tube is also provided with the second connecting structure, the second end of the second main tube is also provided with the first connecting structure, and the first stent, the second stent and the third stent can be spliced ​​together in pairs.

[0011] In one embodiment, the second support further includes an inner tube and a branch tube, the inner tube being housed within the cavity of the second main tube; the opening of the first end of the inner tube faces the first or second end of the second main tube, and the second end of the inner tube is connected to the wall of the second main tube, and one end of the branch tube is inserted into the cavity of the inner tube.

[0012] In one embodiment, the first main tube includes at least one corrugated coil arranged along its own axial direction, and a first coating covering the inner or outer surface of the first main tube.

[0013] The first support also includes an anchor, which is disposed at the first end of the first main tube.

[0014] In one embodiment, the second main tube is a mesh structure; or,

[0015] The second main tube includes at least one corrugated coil arranged along its own axial direction, and the second support also includes a second covering film, which covers the inner or outer surface of the second main tube; corresponding to the connection position between the embedded tube and the second main tube, the second covering film is provided with a through hole communicating with the inner cavity of the embedded tube.

[0016] In one embodiment, the third main tube is a mesh structure; or,

[0017] The third main tube includes at least one corrugated coil arranged along its own axial direction, and the third support also includes a third coating, which covers the inner or outer surface of the third main tube.

[0018] In one embodiment, the spliced ​​vascular stent further includes a fixing member, which is fixed to the outer wall of the splice joint where the first stent and the second stent are spliced.

[0019] In one embodiment, the first connecting structure extends along the axial direction of the first main tube; or, the second connecting structure extends along the axial direction of the second main tube.

[0020] In one embodiment, a limiting groove extending along its own axial direction is formed on the inner or outer wall of the second end of the first main tube, the limiting groove being the first connecting structure; and a limiting member is provided on the outer or inner wall of the first end of the second main tube, the limiting member being the second connecting structure; or,

[0021] The inner or outer wall of the second end of the first main tube is provided with a limiting member, which is the first connecting structure. The outer or inner wall of the first end of the second main tube is provided with a limiting groove extending along its own axial direction, which is the second connecting structure.

[0022] In one embodiment, at least two first connecting structures are provided, and the at least two first connecting structures are arranged along the circumferential direction of the first main tube; or,

[0023] The second connection structure is provided in at least two forms, and the at least two second connection structures are arranged along the circumferential direction of the second main tube.

[0024] The technical solution provided by this invention has the following advantages and effects:

[0025] This modular vascular stent can be assembled into a single unit using a first stent and a second stent connected by a first and a second connecting structure. Therefore, the first and second stents can be selected and combined according to the patient's condition, and then implanted into the affected area to treat the patient's disease. Consequently, this modular vascular stent can be adapted to different individual patients' vascular anatomy or different disease areas, reducing the types and sizes of stents and improving its versatility. Attached Figure Description

[0026] The accompanying drawings illustrate specific examples of the technical solutions described in this invention and, together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this invention.

[0027] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0028] Figure 1 This is a schematic diagram of the structure of a spliced ​​vascular stent according to the present invention;

[0029] Figure 2 This is a schematic diagram of the branch tube structure of a spliced ​​vascular stent according to the present invention;

[0030] Figure 3 This is a schematic diagram of the first connecting structure of a spliced ​​vascular stent in one embodiment;

[0031] Figure 4 This is a schematic diagram of the second connection structure of a spliced ​​vascular stent in one embodiment;

[0032] Figure 5 yes Figure 3 and Figure 4A schematic diagram of the structure in which the first connecting structure and the second connecting structure are combined;

[0033] Figure 6 This is a schematic diagram of the first and second connecting structures of a spliced ​​vascular stent in another embodiment.

[0034] Figure 7 yes Figure 6 A schematic diagram of the first and second connecting structures in operation, where arrows indicate the directions of circumferential and axial adjustment;

[0035] Figure 8 yes Figure 6 A schematic diagram of the first and second connecting structures after adjustment in the circumferential and axial directions;

[0036] Figure 9 This is a schematic diagram of the spliced ​​vascular stent in Example 1;

[0037] Figure 10 This is a schematic diagram of the spliced ​​vascular stent in Example 2;

[0038] Figure 11 This is a schematic diagram of the spliced ​​vascular stent in Example 3;

[0039] Figure 12 This is a schematic diagram of the spliced ​​vascular stent in Example 4.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Interlocking vascular stents;

[0042] 1. First support; 11. First main tube; 12. First membrane; 13. Anchor; 2. Second support; 21. Second main tube; 22. Second membrane; 23. Branch tube; 24. Embedded tube; 3. Third support; 31. Third main tube; 32. Third membrane; 4. First connecting structure; 5. Second connecting structure; 6. Fixing element. Detailed Implementation

[0043] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0044] Unless otherwise specified or defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. When considering the technical solutions of this invention in a real-world context, all technical and scientific terms used herein may also have meanings corresponding to the objectives of achieving the technical solutions of this invention.

[0045] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0046] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0047] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0048] It should be noted that, in the description of the invention, the "first end" refers to the end closer to the heart, i.e., the proximal end; and the "second end" refers to the end farther from the heart, i.e., the distal end.

[0049] This invention provides a splicing vascular stent 100, such as Figure 1 As shown, the splicing vascular stent 100 includes a first stent 1 and a second stent 2 that can be spliced ​​together.

[0050] like Figure 1 , Figure 2 and Figure 9 As shown, the first stent 1 includes a first main tube 11, and the second end of the first main tube 11 has a first connecting structure 4. Understandably, the first stent 1 can be used for anchoring the aorta, and after being implanted into a human blood vessel, the second end is located at the distal end. The first main tube 11 can effectively support the diseased blood vessel and keep the blood flow unobstructed.

[0051] The second stent 2 includes a second main tube 21, with a second connecting structure 5 at its first end. This second main tube 21 effectively supports the diseased blood vessel and reduces the impact of blood flow on it. Understandably, by examining the patient's diseased blood vessel, and depending on the patient's condition, the first stent 1 and the second stent 2 can be combined and spliced ​​together. The spliced ​​stent is then implanted into the patient's affected area to treat the disease.

[0052] In summary, compared with existing technologies, the modular vascular stent 100 has at least the following beneficial effects: The first stent 1 and the second stent 2 of the modular vascular stent 100 can be spliced ​​together as a single unit via the first connecting structure 4 and the second connecting structure 5. Therefore, the first stent 1 and the second stent 2 can be selected and combined according to the patient's condition, and then implanted into the patient's diseased area to achieve treatment. Thus, the modular vascular stent 100 can be adapted to the vascular anatomy of different patients or different diseased areas, reducing the types and specifications of stents and improving the versatility of the modular vascular stent 100.

[0053] In some embodiments, such as Figure 1 As shown, the spliced ​​vascular stent 100 also includes a third stent 3; the third stent 3 includes a third main tube 31, which can also effectively support the diseased blood vessel, maintain blood flow, and reduce the impact of blood flow on the diseased blood vessel. The first end of the third main tube 31 is also provided with a second connecting structure 5, and the second end of the second main tube 21 is also provided with a first connecting structure 4. The first stent 1, the second stent 2, and the third stent 3 can be spliced ​​together in pairs. It should be noted that the specific scheme in which the first stent 1, the second stent 2, and the third stent 3 can be spliced ​​together in pairs includes: the first stent 1, the second stent 2, and the third stent 3 can be spliced ​​sequentially, or the first stent 1 and the second stent 2 can be spliced ​​together, or the first stent 1 and the third stent 3 can be spliced ​​together, or the second stent 2 and the third stent 3 can be spliced ​​together, or the second stent 2 and the second stent 2 can be spliced ​​together. Specifically, the splicing can be performed according to the configuration of the first connecting structure 4 and the second connecting structure 5. Understandably, by examining the diseased blood vessels of the patient, and depending on the patient's condition, any combination of the first stent 1, the second stent 2, and the third stent 3 can be selected and combined. Through the coordinated setting of the first connecting structure 4 and the second connecting structure 5, the selected stents can be spliced ​​together, which can adapt to the vascular anatomy of different patients or different disease areas. The spliced ​​stent is then implanted into the patient's disease area to achieve the treatment of the patient's disease.

[0054] In some embodiments, such as Figure 1 and Figure 9As shown, the second stent 2 also includes a branch tube 23 and an inlay tube 24. The inlay tube 24 is housed within the lumen of the second main tube 21. The opening of the first end of the inlay tube 24 faces the first or second end of the second main tube 21 to adapt to the direction of blood flow within the blood vessel, and the second end of the inlay tube 24 is connected to the wall of the second main tube 21. One end of the branch tube 23 is inserted into the lumen of the inlay tube 24. Specifically, in this embodiment, during use, the first end of the branch tube 23 is inserted from the second end of the inlay tube 24 into the lumen of the inlay tube 24, and the second end of the branch tube 23 is implanted into the patient's branch blood vessel, thereby keeping the blood flow of the patient's branch unobstructed, effectively supporting the branch of the diseased blood vessel, thereby keeping the blood flow of the patient's blood vessel branch unobstructed, and reducing the impact of blood flow on the branch of the diseased blood vessel. It should be noted that one or more inset tubes 24 can be provided. Multiple inset tubes 24 can be arranged on the same side of the second main tube 21, or arranged on opposite sides of the second main tube 21. Of course, the inset tube 24 can be placed at any position on the second main tube 21, depending on the actual situation, and no special restrictions are placed here. Understandably, when the patient's lesion area includes the aorta and branch vessels, the branch tube 23 is inserted into the lumen of the inset tube 24. The inset tube 24 can cover the outer peripheral surface of the first end of the branch tube 23, thereby effectively preventing internal leakage.

[0055] In some embodiments, both ends of the embedded tube 24 are provided with developing structures so that the position of the developing structures can be clearly observed by an imaging device, thereby facilitating and quickly inserting the branch tube 23 into the embedded tube 24.

[0056] In some embodiments, such as Figure 1 As shown, the axis of the embedded tube 24 intersects the axis of the second main tube 21, that is, the embedded tube 24 is inclinedly connected to the side wall of the second main tube 21, thereby causing the branch tube 23 to be inclinedly connected to the side wall of the second main tube 21, effectively preventing the branch tube 23 from bending and getting blocked.

[0057] In some embodiments, such as Figure 1 As shown, the first main tube 11 includes at least one corrugated coil arranged along its own axial direction, and a first covering membrane 12 covering the inner or outer surface of the first main tube 11. The first covering membrane 12 can effectively isolate blood flow from the vascular lesion area, effectively preventing continuous damage to the lesion vessel by high-pressure blood flow. Specifically, the first main tube 11 can be formed into a W-shaped corrugated coil structure by bending a metal wire or cutting a metal tube, and multiple W-shaped corrugated coil structures cooperate to form the first main tube 11. It can be understood that the corrugated coil structure of the first main tube 11 can effectively support the lesion vessel, keep the blood flow unobstructed, and, together with the first covering membrane 12, can effectively prevent continuous damage to the lesion vessel by high-pressure blood flow.

[0058] In some embodiments, such as Figure 1 As shown, the first stent 1 also includes an anchor 13, which is disposed at the first end of the first main tube 11. It should be noted that the anchor 13 can be in the form of a trumpet-shaped coil structure. By setting the anchor 13, it can be used to descend the proximal aorta and enhance the anchoring force of the first stent 1.

[0059] In some embodiments, such as Figure 1 As shown, the second main tube 21 includes at least one corrugated coil arranged along its own axial direction. Specifically, the second main tube 21 can be formed into a W-shaped corrugated coil structure by bending metal wire or cutting metal tube. The second stent 2 also includes a second membrane 22, which covers the inner or outer surface of the second main tube 21. Understandably, the corrugated structure of the second main tube 21 can effectively support the diseased blood vessel and maintain unobstructed blood flow. The second membrane 22 can effectively isolate blood flow from the diseased area of ​​the blood vessel, effectively avoiding continuous damage to the diseased blood vessel by high-pressure blood flow. Corresponding to the connection position between the embedded tube 24 and the second main tube 21, the second membrane 22 is provided with a through hole communicating with the inner cavity of the embedded tube 24. This allows the inner cavity of the embedded tube 24 to communicate with the outside of the second main tube 21, facilitating the insertion of the branch tube 23 into the inner cavity of the embedded tube 24, and preventing the second membrane 22 from obstructing the insertion of the branch tube 23.

[0060] In some embodiments, such as Figure 12 As shown, the second main tube 21 has a mesh structure. The mesh structure of the second main tube 21 can effectively support the diseased blood vessel, expand the true lumen, and reduce the impact of blood flow on the diseased blood vessel. In addition, the outer or inner surface of the mesh structure can also be covered with a second membrane 22. Through the cooperation of the mesh structure and the second membrane 22, the impact of blood flow on the diseased blood vessel can be further reduced.

[0061] In some embodiments, such as Figure 1 As shown, the third main tube 31 includes at least one corrugated coil arranged along its own axial direction. Specifically, the third main tube 31 can be formed into a W-shaped corrugated coil structure by bending metal wire or cutting metal tube. The third stent 3 also includes a third cladding 32, which covers the inner or outer surface of the third main tube 31. Understandably, the corrugated structure of the third main tube 31 can effectively support the diseased blood vessel and maintain unobstructed blood flow, while the third cladding 32 can effectively isolate blood flow from the diseased area of ​​the blood vessel, effectively avoiding continuous damage to the diseased blood vessel from high-pressure blood flow.

[0062] In some embodiments, such as Figure 12As shown, the third main tube 31 has a mesh structure. The mesh structure of the third main tube 31 can effectively support the diseased blood vessel, expand the true lumen, and reduce the impact of blood flow on the diseased blood vessel. In addition, the outer or inner surface of the mesh structure can also be covered with a third membrane 32. Through the cooperation of the mesh structure and the third membrane 32, the impact of blood flow on the diseased blood vessel can be further reduced.

[0063] In some embodiments, such as Figures 9 to 12 As shown, the first main tube 11 and / or the second main tube 21 and / or the third main tube 31 and / or the branch tube 23 are made of shape memory material; specifically in this embodiment, the first main tube 11, the second main tube 21, the third main tube 31 and the branch tube 23 are all made of metal material with shape memory function, which has good deformation recovery ability and can adapt to the shape and blood flow of different blood vessels in the human body.

[0064] In some embodiments, such as Figure 1 As shown, the spliced ​​vascular stent 100 also includes a fixing member 6, which is fixed to the outer wall of the splice joint between the first stent 1 and the second stent 2. Understandably, the fixing member 6 can be a cable tie, Velcro, or a membrane with a connecting function, etc. By setting the fixing member 6 on the outer wall of the splice joint between two adjacent stents, the stability of the connection between the two stents can be further improved.

[0065] In some embodiments, the outer wall of the fastener 6 is provided with a developing structure so that the position of the developing structure can be clearly observed by an imaging device, thereby facilitating and quickly observing the splicing position.

[0066] In some embodiments, such as Figure 7 and Figure 8 As shown, the first connecting structure 4 extends along the axial direction of the first main tube 11. Understandably, by extending the first connecting structure 4 along the axial direction of the first main tube 11, the distance between the two spliced ​​stents can be adjusted by moving the second connecting structure 5 along the axial direction of the first main tube 11 on the first connecting structure 4. This allows adjustment of the length of the spliced ​​stent in the axial direction of the first main tube 11 or the second main tube 21 to accommodate different patient vascular anatomy or different disease areas. Similarly, the second connecting structure 5 extends along the axial direction of the second main tube 21, allowing the distance between the two spliced ​​stents to be adjusted by moving the first connecting structure 4 along the axial direction of the second main tube 21 on the second connecting structure 5.

[0067] In some embodiments, such as Figures 3 to 5As shown, the inner or outer wall of the second end of the first main tube 11 is provided with a limiting groove extending along its own axial direction. The limiting groove is a first connecting structure 4. The outer or inner wall of the first end of the second main tube 21 is provided with a limiting member, which is a second connecting structure 5. It can be understood that the first stent 1 and the second stent 2 can be spliced ​​together by the cooperation of the limiting groove and the limiting member. In addition, by extending the limiting groove along the axial direction of the first main tube 11, the distance between the two spliced ​​stents can be adjusted by sliding the limiting member on the limiting groove, thereby adjusting the length of the spliced ​​stent in the axial direction of the first main tube 11 or the second main tube 21 to adapt to the vascular anatomy of different patients or different disease areas. Of course, in other embodiments, the inner or outer wall of the second end of the first main tube 11 can also be provided with a limiting member, which is a first connecting structure 4, and the outer or inner wall of the first end of the second main tube 21 can be provided with a limiting groove extending along its own axial direction, which is a second connecting structure 5.

[0068] In some embodiments, such as Figure 6 As shown, the inner or outer wall of the second end of the first main tube 11 is provided with at least two insertion holes arranged along its own axial direction. The insertion holes are first connecting structures 4. The outer or inner wall of the first end of the second main tube 21 is provided with positioning pins, which are second connecting structures 5. It can be understood that the first stent 1 and the second stent 2 can be spliced ​​together by the cooperation of the insertion holes and positioning pins. In addition, by providing at least two insertion holes, the spacing between the two spliced ​​stents can be adjusted by inserting the positioning pins into different insertion holes, thereby adjusting the length of the spliced ​​stent in the axial direction of the first main tube 11 or the second main tube 21 to adapt to the vascular anatomy of different patients or different disease areas. Of course, in other embodiments, the inner or outer wall of the second end of the first main tube 11 may also be provided with positioning pins, which are first connecting structures 4, and the outer or inner wall of the first end of the second main tube 21 may be provided with at least two insertion holes arranged along its own axial direction, which are second connecting structures 5. Furthermore, it should be noted that the first connecting structure 4 and the second connecting structure 5 are not limited to the types described above, and other structures capable of connecting two adjacent supports may also be applicable.

[0069] In some embodiments, such as Figure 7 and Figure 8As shown, at least two first connecting structures 4 are provided, and the at least two first connecting structures 4 are arranged along the circumferential direction of the first main tube 11; or, at least two second connecting structures 5 are provided, and the at least two second connecting structures 5 are arranged along the circumferential direction of the second main tube 21. Specifically, in this embodiment, the number of first connecting structures 4 and second connecting structures 5 is the same, and the first connecting structures 4 and second connecting structures 5 are arranged in a one-to-one correspondence. It can be understood that by providing at least two first connecting structures 4 arranged along the circumferential direction of the first main tube 11, or by providing at least two second connecting structures 5 arranged along the circumferential direction of the second main tube 21, one of the stents can be rotated along the circumferential direction of the first main tube 11 or the second main tube 21, and then the first stent 1 and the second stent 2 can be spliced ​​together by the cooperation of the first connecting structures 4 and the second connecting structures 5, thereby adjusting the circumferential angle of the spliced ​​stent to adapt to the vascular anatomy of different patients or different disease areas.

[0070] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0071] Example 1 of the spliced ​​vascular stent 100 of this application

[0072] like Figure 9 As shown, the spliced ​​vascular stent 100 of this application includes a first stent 1, a second stent 2, a third stent 3, and a fixation member 6.

[0073] The first support 1 includes a first main tube 11 and a first film 12 covering the outer surface of the first main tube 11. The second end of the first main tube 11 is provided with a plurality of limiting grooves arranged in the circumferential direction of the first main tube 11, and each limiting groove extends in the circumferential direction of the first main tube 11.

[0074] The second support 2 includes a second main tube 21, a second covering 22, a branch tube 23, and an inner tube 24. The second covering 22 covers the outer surface of the first main tube 11. The inner tube 24 is housed in the inner cavity of the second main tube 21, and one end of the inner tube 24 is connected to the tube wall of the second main tube 21. One end of the branch tube 23 is partially inserted into the inner cavity of the inner tube 24, and the other end extends out of the second main tube 21. The first end of the second main tube 21 is provided with a plurality of limiting members arranged circumferentially along the second main tube 21, and the second end is provided with a plurality of limiting grooves arranged circumferentially along the second main tube 21. Each limiting groove extends circumferentially along the second main tube 21.

[0075] The third support 3 includes a third main tube 31 and a third film 32 covering the outer surface of the third main tube 31. The first end of the third main tube 31 is provided with a plurality of limiting members arranged circumferentially along the third main tube 31.

[0076] The first bracket 1, the second bracket 2, and the third bracket 3 are sequentially spliced ​​together, specifically by using limiting grooves and limiting components to make the first bracket 1, the second bracket 2, and the third bracket 3 sequentially spliced ​​together as one unit, and further fixed by the fixing component 6 at the splicing point of adjacent two brackets.

[0077] The spliced ​​vascular stent 100 can be implanted into the aortic arch to protect diseased vessels in the aortic arch.

[0078] Example 2 of the spliced ​​vascular stent 100 of this application

[0079] Compared with Example 1, such as Figure 10 As shown, the difference in this embodiment is that this embodiment only includes a first bracket 1, a third bracket 3 and a fixing member 6, and the first end of the first bracket 1 is provided with an anchoring member 13. The first bracket 1 and the third bracket 3 are spliced ​​together to make the first bracket 1 and the third bracket 3 sequentially spliced ​​into one body, and further fixed by the fixing member 6 at the splicing point of two adjacent brackets.

[0080] The spliced ​​vascular stent 100 can be implanted into the thoracic aorta to protect diseased vessels in the thoracic aorta.

[0081] Example 3 of the spliced ​​vascular stent 100 of this application

[0082] Compared with Example 1, such as Figure 11 As shown, the difference in this embodiment is that: this embodiment only includes a first bracket 1 and two second brackets 2, and the first end of the first bracket 1 is provided with an anchor 13. The first bracket 1 and the two second brackets 2 are spliced ​​together in sequence to make the first bracket 1 and the two second brackets 2 spliced ​​together as one unit, and further fixed by the fixing member 6 at the splicing point of adjacent two brackets.

[0083] The spliced ​​vascular stent 100 can be implanted into the thoracic and abdominal aorta to protect diseased vessels in the aorta.

[0084] Example 4 of the spliced ​​vascular stent 100 of this application

[0085] Compared with Example 1, such as Figure 12 As shown, the difference in this embodiment is that both the second main tube 21 and the third main tube 31 in this embodiment are mesh structures. The mesh structure of the second main tube 21 and the third main tube 31 can effectively support the diseased blood vessel, expand the true lumen, and reduce the impact of blood flow on the diseased blood vessel.

[0086] Therefore, as can be seen from the above three embodiments, depending on the patient's condition, any combination of the first stent 1, the second stent 2, and the third stent 3 can be selected and implanted into the patient's affected area to treat the disease. Thus, this modular vascular stent 100 can adapt to the vascular anatomy of different patients or different affected areas, reducing the types and specifications of stents and improving the versatility of the modular vascular stent 100.

[0087] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0088] The purpose of the above embodiments is to reproduce and derive the technical solution of the present invention by way of example, and to fully describe the technical solution, purpose and effect of the present invention. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosure of the present invention, and not to limit the scope of protection of the present invention.

[0089] The above embodiments are not an exhaustive list based on the present invention, and there may be many other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A spliced ​​vascular stent, characterized in that, The spliced ​​vascular stent includes a first stent and a second stent; The first support includes a first main tube, and a first connecting structure is provided at the second end of the first main tube; the second support includes a second main tube, and a second connecting structure is provided at the first end of the second main tube. The first connecting structure and the second connecting structure are configured to cooperate with each other so that the first support and the second support can be spliced ​​together as a whole. The first connecting structure extends along the axial direction of the first main tube; or, the second connecting structure extends along the axial direction of the second main tube. The second end of the first main tube has a limiting groove extending along its own axial direction on its inner or outer wall. The limiting groove is the first connecting structure. The first end of the second main tube has a limiting member on its outer or inner wall. The limiting member is the second connecting structure. The inner or outer wall of the second end of the first main tube is provided with a limiting member, which is the first connecting structure. The outer or inner wall of the first end of the second main tube is provided with a limiting groove extending along its own axial direction, which is the second connecting structure. The limiting member can slide on the limiting groove to adjust the distance between the first and second supports that are spliced ​​together.

2. The spliced ​​vascular stent as described in claim 1, characterized in that, The spliced ​​vascular stent also includes a third stent; the third stent includes a third main tube, the first end of the third main tube is also provided with the second connecting structure, the second end of the second main tube is also provided with the first connecting structure, and the first stent, the second stent and the third stent can be spliced ​​together in pairs.

3. The spliced ​​vascular stent as described in claim 1, characterized in that, The second support also includes an embedded tube and a branch tube. The embedded tube is housed in the inner cavity of the second main tube. The opening of the first end of the embedded tube faces the first or second end of the second main tube, and the second end of the embedded tube is connected to the tube wall of the second main tube. One end of the branch tube is inserted into the inner cavity of the embedded tube.

4. The spliced ​​vascular stent as described in claim 1, characterized in that, The first main tube includes at least one corrugated coil arranged along its own axial direction, and a first coating covering the inner or outer surface of the first main tube; The first support also includes an anchor, which is disposed at the first end of the first main tube.

5. The spliced ​​vascular stent as described in claim 3, characterized in that, The second main tube has a mesh structure; or, The second main tube includes at least one corrugated coil arranged along its own axial direction, and the second support also includes a second covering film, which covers the inner or outer surface of the second main tube; corresponding to the connection position between the embedded tube and the second main tube, the second covering film is provided with a through hole communicating with the inner cavity of the embedded tube.

6. The spliced ​​vascular stent as described in claim 2, characterized in that, The third main tube has a mesh structure; or, The third main tube includes at least one corrugated coil arranged along its own axial direction, and the third support also includes a third coating, which covers the inner or outer surface of the third main tube.

7. The spliced ​​vascular stent as described in claim 1, characterized in that, The spliced ​​vascular stent also includes a fixing member, which is fixed to the outer wall of the splice joint where the first stent and the second stent are spliced.

8. The spliced ​​vascular stent as described in any one of claims 1 to 7, characterized in that, The first connecting structure is provided in at least two forms, and the at least two first connecting structures are arranged along the circumferential direction of the first main tube; or, The second connection structure is provided in at least two forms, and the at least two second connection structures are arranged along the circumferential direction of the second main tube.

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