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Flexible intravascular stent applied to peripheral blood vessels

A vascular stent and peripheral blood vessel technology, applied in stents and other directions, can solve the problems of inability to meet the work requirements of peripheral blood vessels, lack of flexible stent structure design, high fatigue performance requirements, etc., to ensure normal expansion, good fatigue performance, and a wide range of applications. Effect

Pending Publication Date: 2021-11-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Peripheral blood vessels have high curvature and more bending movements, so the requirements for the flexibility and fatigue performance of the stent are high. Most of the existing stents are rigid structural stents, and the radial stiffness can meet the work requirements, but the flexibility is insufficient, and the structure of the flexible stent is lacking. Design, unable to meet the working needs of peripheral blood vessels

Method used

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  • Flexible intravascular stent applied to peripheral blood vessels
  • Flexible intravascular stent applied to peripheral blood vessels
  • Flexible intravascular stent applied to peripheral blood vessels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a flexible vascular stent applied to peripheral blood vessels, the support module is a closed-loop structure, the number of support modules is four, including a first support module 1, a second support module 2, a third support module 3 and a Four support modules 4; the number of the connection modules is three, including a first connection module 31 , a second connection module 32 and a third connection module 33 . Adjacent supporting modules are connected through connecting modules; each supporting module includes three supporting units. The first support module comprises a first support unit 11, a second support unit 12, a third support unit 13, a first s-shaped connecting rib A21 and a first s-shaped connecting rib B22; the first supporting unit 11, the second supporting The units 12 are connected by a first s-shaped connecting rib A21, and the second supporting unit 12 and the third supporting unit 13 are connected by a first s-shaped co...

Embodiment 2

[0041] The difference between embodiment 2 and embodiment 1 is that the number of the connection modules is three, including the fourth connection module 41, the fifth connection module 42 and the sixth connection module 43, and the second s in each of the connection modules The number of S-shaped connecting ribs is 3, and the adjacent second S-shaped connecting ribs are two diamond-shaped supports in the circumferential direction; the angle formed by the projection of the corresponding second S-shaped connecting ribs in the adjacent connecting modules in the axial direction Both are 40°, and the projection of the bracket is equally divided.

Embodiment 3

[0043] The difference between embodiment 3 and embodiment 1 is that the number of the connection modules is three, including the seventh connection module 51, the eighth connection module 52 and the ninth connection module 53, and the second s in each of the connection modules The number of S-shaped connecting ribs is 2, and the adjacent second S-shaped connecting ribs are three rhombus supports in the circumferential direction; the angle formed by the projection of the corresponding second S-shaped connecting ribs in the adjacent connecting modules in the axial direction Both are 80°, and the projection of the bracket is equally divided.

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Abstract

The invention provides a flexible intravascular stent applied to peripheral blood vessels, which comprises a supporting module and a connecting module; the supporting module comprises a plurality of supporting units; each supporting unit comprises a rhombic supporting body; the adjacent rhombic supporting bodies are connected through a u-shaped connecting rib in the circumferential direction; the adjacent supporting units are connected through a first s-shaped connecting rib in the axial direction; the connecting module comprises a plurality of second s-shaped connecting ribs; the adjacent supporting modules are connected through the second s-shaped connecting ribs which are non-uniformly distributed in the circumferential direction; when a plurality of second s-shaped connecting ribs are arranged, the second s-shaped connecting ribs are arranged adjacently or at intervals in the circumferential direction; when the second s-shaped connecting ribs are arranged at intervals, the second s-shaped connecting ribs adjacent in the circumferential direction are spaced by a plurality of rhombic supporting bodies; the corresponding second s-shaped connecting ribs in the adjacent connecting modules in the axial direction are arranged in a staggered mode; and the projection of the support is equally divided by the included angle formed by the projection of the second s-shaped connecting ribs in the axial direction. The stent disclosed by the invention has better flexibility and fatigue resistance and is suitable for peripheral blood vessels.

Description

technical field [0001] The invention belongs to the technical field of interventional medical devices, and in particular relates to a flexible vascular stent applied to peripheral blood vessels. Background technique [0002] Peripheral vascular disease mainly refers to arteriosclerosis obliterans, Takayasu arteritis, and vasculitis obliterans, which are common diseases with an incidence rate of 15% to 20%. The most frequent sites of peripheral vascular disease are the iliac arteries, femoral arteries, and popliteal arteries. Different from vascular diseases such as coronary arteries and nerves, peripheral vascular disease has the characteristics of severe symptoms, long blood vessels, cross-joints, and complex stress. Long, with a large difference in caliber; the diseased joints move frequently; they are obviously affected by external forces, affected by human activities, and have compression, bending and other external forces on blood vessels. Peripheral blood vessels hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/915
CPCA61F2/915
Inventor 王炎申祥李函青田润
Owner JIANGSU UNIV