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Biodegradable intravascular stent and production method thereof

An internal stent and biological technology, applied in the direction of the stent, can solve the problems of fracture and slippage of the bending point, low radial support force of the stent in the blood vessel, etc., achieve a small axial shortening rate, solve the problem of brittleness, and structure stable effect

Inactive Publication Date: 2014-06-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with metal monofilaments of the same fineness, the radial support force of biodegradable intravascular stents is low, and the monofilaments are hard and brittle, which is prone to breakage and slippage at bending points during the stent preparation process.

Method used

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  • Biodegradable intravascular stent and production method thereof
  • Biodegradable intravascular stent and production method thereof
  • Biodegradable intravascular stent and production method thereof

Examples

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Embodiment

[0029] like figure 2 As shown, it is a schematic diagram of the biodegradable intravascular stent structure, image 3 As an expanded view, the biodegradable intravascular stent includes an annular mesh structure composed of biodegradable fiber braided wires, and the annular mesh structure is composed of multiple rows of wavy structures, each row of wavy structures It consists of 6 V-shaped structural units, and the wave-shaped structures in two adjacent rows are symmetrically arranged. The middle end point of each V-shaped structural unit (the first V-shaped structural unit 1) is the symmetrical V-shaped structure in the adjacent row. The middle end points of the unit (the second V-shaped structural unit 2 ) are connected once every two non-bonding points 4 to form a bonding point 3 . like Figure 4 As shown, the connection mode of the joint point 3 is a cross connection of braided wires, and at the joint point 3, the braided wires in one row are arranged in the gaps of the...

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Abstract

The invention provides a biodegradable intravascular stent and a production method thereof. The biodegradable intravascular stent is characterized in that the biodegradable intravascular stent comprises an annular net structure made of biodegradable fiber braided threads; the annular net structure is composed of a plurality of rows of wavy structures; each row of wavy structure is composed of a plurality of V-shaped structure units; every two rows of wavy structures are parallel to each other; the endpoint in the middle of each V-shaped structure unit is connected with the endpoint in the middle of the symmetrical V-shaped structure unit in the adjacent row once every other two non-joint points to form a joint point. The biodegradable intravascular stent low in axial shortening rate can radially deform greatly due to the annular net structure, and the V-shaped structure units of two adjacent rows are connected once every other two non-joint points, so that the length of the stent is not changed greatly under the condition of great change of radial diameter of the stent, and the intravascular stent can be implanted conveniently by means of a conveyor.

Description

technical field [0001] The invention belongs to the field of intravascular stent and its preparation, in particular to a biodegradable intravascular stent and a manufacturing method thereof. Background technique [0002] At present, intravascular metal stents have been widely used in the treatment of various vascular stenotic lesions, and great improvements have been made in the selection of metal materials, stent types and manufacturing processes. However, the histocompatibility and hemocompatibility of bare metal stents are poor. The placement of the stents will cause late thrombosis, resulting in restenosis, and the residual metal ions will cause harm to the human body. The long-term therapeutic effect is not optimistic. [0003] The biodegradable endovascular stent has good biocompatibility, which can avoid the later intimal proliferation, and after completing the mechanical support in the human body, it will be completely degraded into small molecular substances, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/90
Inventor 张佩华王聪儿杨庆朱蕾郯志清吕志前姜晓彤王巧依
Owner DONGHUA UNIV
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