Intravascular stent

Abstract

The utility model relates to the technical field of intravascular stents, and provides an intravascular stent which comprises a stent body, the stent body comprises a plurality of sets of wave-shaped supporting rings and a plurality of connecting rods, the connecting rods are connected between every two adjacent sets of wave-shaped supporting rings, the stent body is conical, the diameter of the first end is larger than that of the second end, and the connecting rods are arranged from the first end to the second end. The length of the unfolded waveform support rings is gradually reduced, the design of the waveform support rings not only ensures the radial strength of the stent, but also enhances the flexibility and adaptability of the stent, so that the stent can be better attached to the blood vessel wall, two adjacent sets of waveform support rings are connected through a plurality of connecting rods, and the overall stability and structural integrity of the stent are ensured. The main body of the stent is conical, so that the stent can better adapt to the physiological structural characteristics of a conical blood vessel, the gradual transition of radial supporting force of the stent at different positions is ensured, the excessive compression on the blood vessel wall is reduced, the risks of stent breakage and restenosis in the stent are reduced, and the use safety performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vascular stents, in particular to a vascular stent. Background Art

[0002] In the related art, for tapered blood vessels, such as the superior mesenteric artery, which have physiological twisting and gradually tapering anatomical characteristics, once dissection or stenosis occurs, doctors can only use straight-tube stents beyond the scope because there are no special stents. For lesions in tapered blood vessels, doctors generally select the specifications and sizes of straight-tube stents according to the larger diameter end of the tapered blood vessel, which makes the stent size at the smaller end of the blood vessel too large, resulting in greater strain and chronic outward expansion force. The greater strain greatly reduces the fatigue resistance of the stent and increases the risk of fatigue fracture of the stent. The greater chronic outward expansion force has a great stimulation to the blood vessels, which is easy to cause endothelial hyperplasia and increase the risk of restenosis in the stent, and the safety is not high. Utility Model Content

[0003] The utility model provides a blood vessel stent, which is used to solve the defects of the prior art that the straight tube stent is easy to break and has the risk of restenosis in the stent when applied to a tapered blood vessel, and improves the safety performance of the blood vessel stent.

[0004] The utility model provides a vascular stent, comprising:

[0005] The bracket body includes multiple groups of corrugated support rings and multiple connecting rods, wherein the connecting rods are connected between two adjacent groups of the corrugated support rings. The bracket body is conical, and the diameter of the first end of the bracket is larger than the diameter of the second end. From the first end to the second end, the length of the corrugated support ring after expansion gradually decreases.

[0006] According to the vascular stent of the embodiment of the utility model, each group of the corrugated support rings includes a plurality of corrugated units connected in sequence, and the corrugated units include arc segments and straight line segments connected on both sides of the arc segments, and from the first end to the second end, the angle formed by the arc segment and the straight line segment gradually decreases.

[0007] According to the vascular stent of the embodiment of the utility model, the arc segment near the first end is connected to the straight line segment to form a crest, and the arc segment near the second end is connected to the straight line segment to form a trough, and the connecting rod connects the crests of two adjacent corrugated support rings, or the connecting rod connects the troughs of two adjacent corrugated support rings.

[0008] According to the vascular stent of the embodiment of the utility model, along the axial direction of the stent body, a plurality of connecting rods are distributed at intervals;

[0009] and / or,

[0010] Along the circumferential direction of the bracket body, a plurality of connecting rods are distributed at intervals.

[0011] According to the vascular stent of the embodiment of the utility model, each group of the corrugated support rings is conical, and the taper of the stent body is equal to the taper of each group of the corrugated support rings.

[0012] According to the vascular stent of the embodiment of the utility model, the taper of the stent body is 0-30°;

[0013] And / or, the thickness of the stent body is 0.05 to 0.2 mm;

[0014] And / or, the length of the connecting rod is 1-1.5 times the length of the straight line segment.

[0015] According to the vascular stent of the embodiment of the utility model, the stent body is installed with a developing ring, and the developing ring is provided with metal developing points.

[0016] According to the vascular stent of the embodiment of the utility model, the first end and the second end are both provided with the developing ring, and the number of the developing rings at the first end is different from the number of the developing rings at the second end.

[0017] According to the vascular stent of the embodiment of the utility model, the stent body is made of nickel-titanium alloy.

[0018] According to the vascular stent of the embodiment of the utility model, the surface of the stent body is coated with at least one of an anticoagulant coating and a drug-carrying layer.

[0019] The vascular stent provided by the utility model includes a stent body, which includes multiple groups of corrugated support rings and multiple connecting rods. The connecting rods are connected between two adjacent groups of corrugated support rings. The stent body is tapered, and the diameter of the first end is greater than the diameter of the second end. From the first end to the second end, the length of the corrugated support ring after expansion gradually decreases. The design of the corrugated support ring not only ensures the radial strength of the stent, but also enhances the flexibility and adaptability of the stent, so that it can better fit the blood vessel wall. The two adjacent groups of corrugated support rings are connected by multiple connecting rods to ensure the overall stability and structural integrity of the stent. The stent body is tapered, which can better adapt to the physiological structure characteristics of the tapered blood vessel, ensure that the radial support force of the stent at different positions is gradually transitioned, reduce excessive pressure on the blood vessel wall, reduce the risk of stent breakage and restenosis in the stent, and improve safety performance in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the vascular stent provided by the utility model.

[0022] Figure 2 It is a schematic diagram of the deployment of the vascular stent provided by the utility model.

[0023] Figure 3 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0024] Reference numerals:

[0025] 10. support body; 100. corrugated support ring; 200. connecting rod; 11. first end; 12. second end; 110. arc segment; 120. straight line segment; 111. wave crest; 112. wave trough;

[0026] 20. Development ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0030] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0032] In the related art, some peripheral blood vessels, such as the superior mesenteric artery, have physiological twisting and anatomical characteristics of tapering diameters. Once dissection or stenosis occurs, doctors can only use straight-tube stents beyond the scope because there are no dedicated stents. For lesions in conical blood vessels, doctors generally select the specifications and sizes of straight-tube stents according to the larger diameter end of the conical blood vessel, which makes the stent size at the smaller end of the blood vessel too large, resulting in greater strain and chronic outward expansion force. On the one hand, the larger strain greatly reduces the fatigue resistance of the stent and increases the risk of fatigue fracture of the stent; on the other hand, the larger chronic outward expansion force has a great stimulation to the blood vessels, which can easily lead to endothelial hyperplasia and increase the risk of restenosis in the stent. For some long conical lesions, doctors will even choose to splice stents of multiple specifications and sizes, which have poor overall flexibility, great stimulation to the blood vessels, and a high risk of stent fracture at the splicing site, which greatly affects the long-term patency of the blood vessels.

[0033] The existing straight-tube stent cannot adapt to the physiological structural characteristics of the conical shape of the blood vessel, and is prone to the risk of stent breakage and restenosis in the stent, and has poor flexibility in splicing. Therefore, it is necessary to design a new type of vascular stent to solve the above problems existing in the existing vascular stent.

[0034] An embodiment of the utility model, referring to Figure 1-Figure 3 As shown, a vascular stent is provided, which includes a stent body 10, wherein the stent body 10 includes multiple groups of corrugated support rings 100 and multiple connecting rods 200, wherein the connecting rods 200 are connected between two adjacent groups of corrugated support rings 100, the stent body 10 is conical, and the diameter of the first end 11 of the stent is greater than the diameter of the second end 12, and the length of the corrugated support ring 100 after being unfolded gradually decreases from the first end 11 to the second end 12.

[0035] It is understandable that, in this embodiment, the stent body 10 is composed of a plurality of groups of corrugated support rings 100, and each group of corrugated support rings 100 may include a plurality of corrugated units. These corrugated units can provide good radial support force, and at the same time, due to their corrugated structure, the flexibility and adaptability of the stent are enhanced. This design ensures that the stent body 10 can better fit the blood vessel wall while providing sufficient support, reducing the excessive pressure of the stent on the blood vessel wall, thereby reducing the risk of blood vessel wall damage.

[0036] Two adjacent groups of corrugated support rings 100 are connected by a plurality of connecting rods 200, which can ensure the overall stability and structural integrity of the stent and improve the structural strength of the stent body 10. The layout and number of connecting rods 200 can be designed and optimized according to specific application scenarios and usage requirements to balance the radial support force and flexibility of the stent and ensure the stability and safety of the stent in the blood vessel.

[0037] The stent body 10 is conical, that is, the diameter of the first end 11 (proximal end) is larger than the diameter of the second end 12 (distal end). From the first end 11 to the second end 12, the length of the corrugated support ring 100 after expansion gradually decreases. This design can better adapt to the physiological structure characteristics of tapered blood vessels, ensure the gradual transition of the radial support force of the stent at different positions, and also help to achieve more uniform support for the blood vessel wall and reduce excessive pressure on the blood vessel wall.

[0038] The vascular stent provided by the utility model includes a stent body 10, which includes multiple groups of corrugated support rings 100 and multiple connecting rods 200. The connecting rods 200 are connected between two adjacent groups of corrugated support rings 100. The stent body 10 is conical, and the diameter of the first end 11 is greater than the diameter of the second end 12. From the first end 11 to the second end 12, the length of the corrugated support ring 100 after being unfolded gradually decreases. The design of the corrugated support ring 100 not only ensures the radial strength of the stent, but also enhances the flexibility and adaptability of the stent, so that it can better fit the blood vessel wall. The two adjacent groups of corrugated support rings 100 are connected by multiple connecting rods 200 to ensure the overall stability and structural integrity of the stent. The stent body 10 is conical, which can better adapt to the physiological structure characteristics of the conical blood vessel, ensure the gradual transition of the radial support force of the stent at different positions, reduce excessive pressure on the blood vessel wall, reduce the risk of stent breakage and restenosis in the stent, and improve the safety performance of use.

[0039] According to one embodiment of the present invention, referring to Figure 2 and Figure 3 As shown, each group of corrugated support rings 100 includes a plurality of corrugated units connected in sequence, wherein the corrugated units include an arc segment 110 and a straight line segment 120 connected on both sides of the arc segment 110, and from the first end 11 to the second end 12, the angle formed by the arc segment 110 and the straight line segment 120 gradually decreases.

[0040] It can be understood that, in this embodiment, the stent body 10 is composed of a plurality of groups of corrugated support rings 100, and each group of corrugated support rings 100 includes a plurality of identical corrugated units. Each corrugated unit includes a transitional arc segment 110 and two stent rods connected on both sides of the transitional arc segment 110. The angle formed by the arc segment 110 and the straight segments 120 on both sides is variable, which results in the diameter of the corrugated support ring 100 gradually decreasing from the first end 11 (proximal end) to the second end 12 (distal end) of the stent body 10, so that the vascular stent can better adapt to the physiological structure of the tapered blood vessel.

[0041] In an optional specific embodiment, in each corrugated unit, the curvature radius of the transition arc segment 110 and the length of the straight segment 120 are fixed, but the angle between the transition arc segment 110 and the straight segment 120 is variable. This design ensures that the corrugated support ring 100 can form annular structures of different diameters while maintaining structural stability.

[0042] From the first end 11 to the second end 12 of the stent body 10, the angle between the arc segment 110 and the straight segment 120 gradually decreases, resulting in a gradually decreasing diameter of the corrugated support ring 100. This design enables the stent to better fit the shape of the tapered blood vessel and provide uniform support.

[0043] According to one embodiment of the present invention, referring to Figure 2 and Figure 3 As shown, the arc segment 110 near the first end 11 is connected to the straight segment 120 to form a wave crest 111, the arc segment 110 near the second end 12 is connected to the straight segment 120 to form a wave trough 112, and the connecting rod 200 connects the wave crests 111 of two adjacent wave support rings 100, or the connecting rod 200 connects the wave troughs 112 of two adjacent wave support rings 100.

[0044] It can be understood that, in the present embodiment, the connecting rod 200 connects the crests 111 of two adjacent corrugated support rings 100 or the connecting rod 200 connects the troughs 112 of two adjacent corrugated support rings 100, that is, the crests 111 between two adjacent corrugated support rings 100 are connected to the crests 111, or the troughs 112 between two adjacent corrugated support rings 100 are connected to the troughs 112, so that the crests 111 and the troughs 112 between the two corrugated support rings 100 are staggered and connected in staggered peaks, thereby preventing interference between the two corrugated support rings 100 of the bracket body.

[0045] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, along the axial direction of the bracket body 10 , a plurality of connecting rods 200 are distributed at intervals; and / or, along the circumferential direction of the bracket body 10 , a plurality of connecting rods 200 are distributed at intervals.

[0046] In an optional embodiment, a plurality of connecting rods 200 are spaced apart along the axial direction of the stent body 10. By spaced apart distribution of the connecting rods 200 in the axial direction, the vascular stent can exhibit higher flexibility, which enables the stent to better adapt to the bending and twisting of the blood vessel, reducing potential damage to the vascular wall. The spaced apart distribution of the connecting rods 200 helps to reduce the stress concentration of the stent at specific points. In a vascular stent, excessive stress concentration may cause the stent to break or fail. The spaced apart connecting rods 200 can distribute the stress more evenly over the entire stent, thereby improving the reliability and durability of the stent.

[0047] Furthermore, the connecting rods 200 spaced apart in the axial direction can provide additional support where needed, for example, at a bend or narrow area of ​​a blood vessel, the support effect of the stent can be enhanced by increasing the number of connecting rods 200 or adjusting their distribution positions.

[0048] In another optional embodiment, a plurality of connecting rods 200 are spaced apart along the circumferential direction of the stent body 10, and the spaced apart connecting rods 200 in the circumferential direction can enhance the overall stability of the stent. Such stability helps ensure that the stent maintains its predetermined shape and position inside the blood vessel, and prevents displacement or deformation of the stent.

[0049] Whether the connecting rods 200 are spaced apart along the axial direction or the circumferential direction, the flexibility, stability and reliability of the stent can be improved. This design helps to ensure that the stent maintains its predetermined shape and position inside the blood vessel, while reducing potential damage to the blood vessel wall and the risk of thrombosis.

[0050] In a specific embodiment, every two corrugated support rings 100 are evenly connected by 2-6 connecting rods 200 .

[0051] According to an embodiment of the present invention, each group of corrugated support rings 100 is conical, and the taper of the support body 10 is equal to the taper of each group of corrugated support rings 100 .

[0052] It can be understood that in this embodiment, by designing each group of corrugated support rings 100 to be conical and matching the taper of the stent body 10 with the taper of the blood vessel, it can be ensured that the stent body 10 can better adapt to the physiological structure of the blood vessel. This adaptability helps to reduce the pressure and damage of the stent on the blood vessel wall and improve the implantation effect and safety of the stent.

[0053] And because the stent body 10 and each group of corrugated support rings 100 have the same taper, the stent can better fit the blood vessel wall after implantation, reducing the gap between the stent and the blood vessel wall. This fit helps to reduce the eddy current and turbulence of blood inside the stent, optimize blood flow, and reduce the risk of thrombosis.

[0054] According to an embodiment of the present invention, the taper of the bracket body 10 is 0-30°; and / or the thickness of the bracket body 10 is 0.05-0.2 mm; and / or the length of the connecting rod 200 is 1-1.5 times the length of the straight segment 120 .

[0055] In an optional embodiment, the taper α of the stent body 10 is designed to be 0-30°, for example, the taper of the stent body 10 is 10°, which is designed to enable the stent to better adapt to the physiological morphology and blood flow conditions of different diseased blood vessels. A stent with a smaller taper is suitable for blood vessels with a less severe disease, while a stent with a larger taper is more suitable for blood vessels with a more severe disease. By designing different tapers, the stability and adaptability of the stent in different blood vessels can be ensured.

[0056] In an optional embodiment, the thickness of the stent body 10 is 0.05-0.2 mm, and the thickness of the stent body 10 is designed to be 0.05-0.2 mm. This thickness range not only ensures the strength and stability of the stent, but also takes into account the flexibility of the stent and the degree of stimulation to the blood vessel wall. A thinner stent body 10 can reduce the pressure and damage to the blood vessel wall, while improving the flexibility of the stent, making it easier to adapt to the physiological morphology of the blood vessel.

[0057] In an optional embodiment, the length of the connecting rod 200 is designed to be 1-1.5 times the length of the straight section 120. This design can improve the flexibility of the stent, making it easier to adapt to the bending and twisting of the blood vessel. At the same time, the longer connecting rod 200 can also increase the stability of the stent and prevent the stent from shifting or falling off in the blood vessel.

[0058] According to one embodiment of the present invention, referring to Figure 1 As shown, the support body 10 is installed with a developing ring 20, and the developing ring 20 is provided with metal developing points.

[0059] It can be understood that in this embodiment, by setting metal developing points on the developing ring 20, the visualization of the stent during the operation is improved, which facilitates the doctor to accurately locate and observe the status of the stent, ensures that the stent can be accurately implanted at the lesion location, and remains stable during long-term implantation.

[0060] In an optional embodiment, the developing ring 20 is located at both ends of the conical stent body 10 to ensure that the doctor can clearly observe the overall position and status of the stent under medical imaging equipment such as X-rays.

[0061] Furthermore, metal developing points are fixed on the developing ring 20 by welding or riveting. These metal developing points can be made of materials with high X-ray transmittance, such as gold, platinum, tantalum, etc., to ensure that obvious bright spots can be formed under X-rays, further improving the visualization of the stent.

[0062] According to one embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, both the first end 11 and the second end 12 are provided with developing rings 20 , and the number of the developing rings 20 at the first end 11 is different from the number of the developing rings 20 at the second end 12 .

[0063] It is understandable that in this embodiment, the number of developing rings 20 at the first end 11 and the second end 12 is different, which further enhances the recognition of the stent under medical imaging equipment, and the doctor can more accurately locate and observe the position and angle of the stent body 10, which helps to reduce errors during surgery and improve the success rate of surgery. After the stent is implanted, the doctor can easily observe the position and state of the stent in the blood vessel through medical imaging equipment. Since the number of developing rings 20 at the large end and the small end is different, the doctor can more easily determine whether the stent has abnormal conditions such as displacement or deformation.

[0064] In an optional embodiment, the number of developing rings 20 at the first end 11 is greater than the number of developing rings 20 at the second end 12, and the plurality of developing rings 20 are arranged at circumferential intervals along the bracket body 10, which not only ensures the overall visualization effect of the bracket, but also avoids image overlap or blurring caused by too dense developing rings 20.

[0065] According to an embodiment of the present invention, the vascular stent is made of nickel-titanium alloy.

[0066] It is understandable that the stent body 10 is made of superelastic materials such as nickel-titanium alloy through laser cutting and other processes. Nickel-titanium alloy has excellent superelasticity and can quickly return to its original shape even after being subjected to a large external force. This feature enables the stent to better adapt to the shape and curvature of the blood vessel during implantation, reducing damage to the blood vessel wall. The flexibility of nickel-titanium alloy enables it to easily pass through narrow blood vessels and deform as the blood vessels bend and twist. This flexibility ensures the smoothness and stability of the stent during implantation, while also reducing the pressure and stimulation of the stent on the blood vessel wall. In addition, nickel-titanium alloy has good biocompatibility, is non-toxic and harmless to the human body, and will not cause allergic or rejection reactions, ensuring the long-term safety and stability of the stent in the body.

[0067] According to an embodiment of the present invention, the surface of the stent body 10 is coated with at least one of an anticoagulant coating and a drug-carrying layer.

[0068] It is understandable that the anticoagulant coating is mainly used to improve the anticoagulant properties of the stent and prevent blood from forming thrombi on the surface of the stent, thereby maintaining the patency of blood vessels. The anticoagulant coating materials may include heparin and phosphorylcholine, etc. Heparin plays an anticoagulant role by accelerating the rate at which antithrombin neutralizes active coagulation factors, while phosphorylcholine is an amphoteric phospholipid that can resist protein and cell adhesion to achieve an anticoagulant effect.

[0069] In this embodiment, the drug-carrying layer can be used to carry drugs, including but not limited to paclitaxel and rapamycin drugs. Paclitaxel is an anti-tumor drug that can inhibit cell proliferation and reduce the proliferation of vascular smooth muscle cells, thereby reducing the risk of restenosis in the stent; rapamycin is an immunosuppressant that can inhibit cell division and proliferation, reduce inflammatory response, and thus improve the pathological state of the vascular wall.

[0070] In an optional embodiment, the anticoagulant coating and the drug-carrying layer can be combined to form a composite coating with multiple functions. For example, a heparin-like drug can be first coated on the surface of the stent to form an anticoagulant coating, and then drugs such as paclitaxel or rapamycin can be loaded thereon to achieve the dual effects of anticoagulation and inhibition of cell proliferation.

[0071] Optionally, the surface of the stent body is provided with a drug-carrying polymer for drug loading, and these drugs are wrapped in the polymer coating, and local and slow release of the drugs is achieved through slow degradation or penetration of the polymer.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A vascular stent, characterized in that: include: A stent body (10), the stent body (10) comprising a plurality of groups of corrugated support rings (100) and a plurality of connecting rods (200), the connecting rods (200) being connected between two adjacent groups of the corrugated support rings (100), the stent body (10) being tapered, the diameter of the first end (11) of the stent being greater than the diameter of the second end (12), and the length of the corrugated support ring (100) after being deployed gradually decreasing from the first end (11) to the second end (12); Each group of the corrugated support rings (100) comprises a plurality of corrugated units connected in sequence, wherein the corrugated units comprise arc segments (110) and straight line segments (120) connected to both sides of the arc segments (110), and from the first end (11) to the second end (12), the angle formed by the arc segments (110) and the straight line segments (120) gradually decreases.

2. The vascular stent according to claim 1, characterized in that: The arc segment (110) close to the first end (11) is connected to the straight segment (120) to form a wave crest (111), and the arc segment (110) close to the second end (12) is connected to the straight segment (120) to form a wave trough (112), and the connecting rod (200) connects the wave crests (111) of two adjacent wave support rings (100), or the connecting rod (200) connects the wave troughs (112) of two adjacent wave support rings (100).

3. The vascular stent according to claim 1, characterized in that: Along the axial direction of the bracket body (10), a plurality of connecting rods (200) are distributed at intervals; and / or, Along the circumferential direction of the bracket body (10), a plurality of connecting rods (200) are distributed at intervals.

4. The vascular stent according to claim 1, characterized in that: Each group of the corrugated support rings (100) is conical, and the taper of the support body (10) is equal to the taper of each group of the corrugated support rings (100).

5. The vascular stent according to claim 1, characterized in that: The taper of the support body (10) is 0-30°; and / or, the thickness of the stent body (10) is 0.05 to 0.2 mm; And / or, the length of the connecting rod (200) is 1-1.5 times the length of the straight segment (120).

6. The vascular stent according to claim 1, characterized in that: The support body (10) is mounted with a developing ring (20), and the developing ring (20) is provided with metal developing points.

7. The vascular stent according to claim 6, characterized in that: The first end (11) and the second end (12) are both provided with the developing ring (20), and the number of the developing ring (20) at the first end (11) is different from the number of the developing ring (20) at the second end (12).

8. The vascular stent according to any one of claims 1 to 7, characterized in that: The stent body (10) is made of nickel-titanium alloy.

9. The vascular stent according to any one of claims 1 to 7, characterized in that: The surface of the stent body (10) is coated with at least one of an anticoagulant coating and a drug-carrying layer.

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