Biodegradable intravascular stent and production method thereof

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 ...

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.

Images