Intravascular stent based on spring connection

Abstract

The invention relates to the technical field of medical instruments, in particular to an intravascular stent based on spring connection, which comprises a plurality of support rings and a connecting rod assembly which are longitudinally arranged at intervals. Each supporting ring is formed by circumferentially enclosing a plurality of U-shaped units, the supporting rings are connected through connecting rod assemblies, the connecting rod assemblies of the adjacent layers are arranged in a staggered manner, each connecting rod assembly comprises a first connecting rod and a second connecting rod, and each second connecting rod is formed by connecting a first rod section and a second rod section through a spring. Through the elastic telescopic characteristic of the spring, the flexibility and bending adaptability of the intravascular stent are improved, so that the intravascular stent can be tightly attached to the inner wall of a bent blood vessel, stress is effectively dispersed, local blood vessel damage is avoided, meanwhile, uniform radial supporting force is guaranteed, stent displacement and collapse are prevented, hemodynamic performance is optimized, and the intravascular stent has a good application prospect. The device is suitable for treating curving vascular diseases.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a vascular stent based on spring connection. Background Technology

[0002] Vascular diseases pose a serious threat to human health, and vascular stents are widely used in clinical practice as an important treatment method. However, traditional vascular stents have many shortcomings when dealing with tortuous blood vessels. The human body has numerous tortuous blood vessels, such as the circumflex branches of the coronary arteries and the vessels in the Circle of Willis region of the brain. Ordinary welded or one-piece stent structures have poor flexibility, making it difficult to fit tightly against the vessel wall when implanted in tortuous vessels. This can easily cause localized stress concentration in the vessel wall, leading to damage to the vascular intima and increasing the risk of thrombosis.

[0003] In addition, a poorly fitting stent may affect the normal flow of blood, further aggravating vascular lesions. Furthermore, the gap between the stent and the vessel wall can disrupt blood flow, creating turbulence, increasing resistance, stimulating the proliferation of vascular smooth muscle cells, and causing restenosis.

[0004] Therefore, the need for a vascular stent structure that can better adapt to tortuous blood vessels is of great clinical significance. Summary of the Invention

[0005] The purpose of this invention is to provide a vascular stent based on spring connection, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a vascular stent based on spring connection, comprising multiple support rings and a connecting rod assembly, wherein the multiple support rings are longitudinally spaced evenly and arranged parallel to each other, and are connected to each other through the connecting rod assembly; The connecting rod assembly includes at least one connecting rod one and at least one connecting rod two, and two adjacent support rings are connected to each other through the connecting rod one and the connecting rod two.

[0007] Preferably, the support ring is formed by multiple U-shaped units connected end to end in the circumferential direction. Each U-shaped unit includes a first support rod and a second support rod. The first support rod and the second support rod are connected to each other through a bottom connecting section to form a trough. One end of the first support rod is connected to one end of the bottom connecting section, and the second support rod is connected to the other end of the bottom connecting section.

[0008] Preferably, the two adjacent U-shaped units are connected to each other through a top connecting section to form a wave crest, and the free end of the first support rod of one U-shaped unit is fixedly connected to the free end of the second support rod of the other U-shaped unit through the top connecting section.

[0009] Preferably, the connecting rod assemblies of two adjacent layers are staggered at an angle of 180°.

[0010] Preferably, there are two connecting rods and one connecting rod. Both connecting rod one and connecting rod two are used to connect the troughs of two adjacent support rings.

[0011] Preferably, there are two peaks and one trough between each adjacent connecting rod one and connecting rod two.

[0012] Preferably, the second connecting rod is composed of a first rod segment and a second rod segment, and the first rod segment and the second rod segment are connected by a spring; The first and second rod segments are respectively connected to the troughs of the two adjacent support rings.

[0013] Preferably, hook one and hook two are respectively provided at the bottom of the first rod segment and the top of the second rod segment, and one end of the spring is connected to hook one and the other end is connected to hook two.

[0014] Therefore, the present invention provides a vascular stent based on spring connection, which has the following beneficial effects: by adopting a flexible connecting rod assembly connected by springs, and combining the staggered arrangement of the connecting rod assembly, the overall flexibility and bending adaptability of the stent are improved, enabling it to better conform to the inner wall of the curved blood vessel, thereby effectively dispersing stress and avoiding local damage and irritation to the blood vessel. At the same time, this structure ensures uniform radial support force, preventing stent displacement and collapse, and by reducing the gap between the stent and the blood vessel wall, it optimizes hemodynamic performance, which has important clinical application value in the treatment of curved blood vessel diseases. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a vascular stent based on a spring connection in an embodiment of the present invention; Figure 2 This is a schematic diagram of a vascular stent based on a spring connection with springs removed, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure at the first and second segments in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the connecting rod two containing a spring in an embodiment of the present invention; Figure 5 This is a schematic diagram of a vascular stent located inside a curved blood vessel in an embodiment of the present invention; Figure Labels 1. Vascular stent; 2. Support ring; 21. U-shaped unit; 211. First support rod; 212. Second support rod; 213. Bottom connecting section; 214. Top connecting section; 3. Connecting rod assembly; 31. Connecting rod one; 32. Connecting rod two; 321. First rod segment; 322. Second rod segment; 323. Spring; 324. Hook one; 325. Hook two. Detailed Implementation

[0016] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are 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 limiting this invention.

[0017] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0018] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0019] Example like Figure 1-5 As shown, the present invention provides a vascular stent based on spring connection, comprising multiple support rings 2 and connecting rod assembly 3. The multiple support rings 2 are longitudinally spaced evenly and arranged parallel to each other, and are connected to each other through the connecting rod assembly 3 to form a tubular stent structure.

[0020] The support ring 2 is formed by multiple interconnected U-shaped units 21 enclosing it circumferentially. Each U-shaped unit 21 includes a first support rod 211 and a second support rod 212. The first support rod 211 and the second support rod 212 are interconnected through a bottom connecting section 213 to form a trough. One end of the first support rod 211 is connected to one end of the bottom connecting section 213, and the second support rod 212 is connected to the other end of the bottom connecting section 213.

[0021] Two adjacent U-shaped units 21 are connected to each other through a top connecting section 214 to form a crest. The free end of the first support rod 211 of one U-shaped unit 21 is fixedly connected to the free end of the second support rod 212 of the other U-shaped unit 21 through the top connecting section 214. In this embodiment, the vascular stent 1 has a total of five support rings 2, and each support ring 2 has 6 crests and troughs.

[0022] Each layer of the connecting rod assembly 3 includes a first connecting rod 31 and a second connecting rod 32. Two adjacent upper and lower support rings 2 are connected to each other through the first connecting rod 31 and the second connecting rod 32. In this embodiment, two first connecting rods 31 and one second connecting rod 32 are provided in each layer. Both the first connecting rod 31 and the second connecting rod 32 are used to connect the troughs of two adjacent upper and lower support rings 2.

[0023] The connecting rod assemblies 3 of the two adjacent layers are staggered by an angle of 180°. This staggered arrangement allows the vascular stent 1 to distribute stress evenly when bending, avoiding local stress concentration, while improving the overall flexibility and torsional adaptability of the stent and reducing damage to the vascular intima.

[0024] There are two crests and one trough between each adjacent connecting rod 31 and connecting rod 31 and connecting rod 32. This spacing ensures that the connection points are evenly distributed in the circumferential direction, further optimizes the mechanical properties of the support, and prevents the support from twisting or collapsing when it is bent.

[0025] The connecting rod 32 consists of a first segment 321 and a second segment 322, which are connected by a spring 323. The first segment 321 and the second segment 322 are respectively connected to the troughs of two adjacent support rings 2. Hook 1 324 and hook 2 325 are respectively provided at the bottom of the first segment 321 and the top of the second segment 322. One end of the spring 323 is connected to hook 1 324, and the other end is connected to hook 2 325. The introduction of the spring 323 is an innovation; its elastic deformation characteristics allow the connecting rod 322 to elastically expand and contract. When the stent is implanted into a curved blood vessel, the spring 323 can absorb the stress caused by the vessel's curvature, reducing the local pressure of the stent on the vessel wall, while also buffering the vibration caused by vascular pulsation, thus reducing the risk of vascular damage.

[0026] In this embodiment, the vascular stent 1 has five support rings 2, each support ring 2 has 6 peaks and troughs, and each support ring 2 is arranged in the same direction with an angle difference of 180°.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A vascular stent based on a spring connection, characterized in that: It includes multiple support rings and a connecting rod assembly. The multiple support rings are evenly spaced longitudinally and arranged parallel to each other, and are connected to each other through the connecting rod assembly. The connecting rod assembly includes at least one connecting rod one and at least one connecting rod two, and two adjacent support rings are connected to each other through the connecting rod one and the connecting rod two.

2. The vascular stent based on spring connection according to claim 1, characterized in that: The support ring is formed by multiple U-shaped units connected end to end in the circumferential direction. Each U-shaped unit includes a first support rod and a second support rod. The first support rod and the second support rod are connected to each other through a bottom connecting section to form a trough. One end of the first support rod is connected to one end of the bottom connecting section, and the second support rod is connected to the other end of the bottom connecting section.

3. A vascular stent based on a spring connection according to claim 2, characterized in that: Two adjacent U-shaped units are connected to each other through a top connecting section to form a wave crest. The free end of the first support rod of one U-shaped unit is fixedly connected to the free end of the second support rod of the other U-shaped unit through the top connecting section.

4. A vascular stent based on a spring connection according to claim 1, characterized in that: The connecting rod assemblies of the two adjacent layers are staggered at an angle of 180°.

5. A vascular stent based on a spring connection according to claim 1, characterized in that: Two connecting rods are provided for the first type, and one connecting rod is provided for the second type; Both connecting rod one and connecting rod two are used to connect the troughs of two adjacent support rings.

6. A vascular stent based on a spring connection according to claim 2, characterized in that: There are two peaks and one trough between each adjacent connecting rod one and connecting rod two.

7. A vascular stent based on a spring connection according to claim 6, characterized in that: The connecting rod 2 is composed of a first rod segment and a second rod segment, and the first rod segment and the second rod segment are connected by a spring. The first and second rod segments are respectively connected to the troughs of the two adjacent support rings.

8. A vascular stent based on a spring connection according to claim 7, characterized in that: Hook 1 and hook 2 are respectively provided at the bottom of the first rod segment and the top of the second rod segment. One end of the spring is connected to hook 1 and the other end is connected to hook 2.

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