Braided blood vessel stent with external ring-net skirt

Abstract

A braided vascular scaffold with external netted skirt ring layer is made up of elastic metal wire through braiding, and is composed of a netted tubular main body and at least one external netted skirt ring layer, which have multiple deformable units and multiple arc wires at both ends. It can not be moved by blood stream and has high radical supporting power, flexibility and vascular compliance.

Description

technical field [0001] The invention relates to a medical device, in particular to a braided vascular stent with an outer annular mesh skirt suitable for the field of human blood vessel interventional treatment. Background technique [0002] Percutaneous puncture angioplasty, referred to as PTA, is under the guidance of medical imaging equipment, using a puncture needle, a guide wire and a guide sheath to insert a balloon catheter with a tightened stent into a human blood vessel and deliver it to the blood vessel At the stenosis, with the expansion of the balloon, the stent is also stretched. After the balloon is retracted and retracted, the plastically deformed metal stent remains in place and is embedded in the blood vessel, playing the role of dilating the blood vessel. This approach leads to good long-term outcomes of the surgery. [0003] From the perspective of clinical use, an ideal braided vascular stent design with an outer annular mesh skirt should have the follow...

AI Technical Summary

Problems solved by technology

However, due to the limitations of the structure of the existing stents, it is difficult to achieve effective unity in these two aspects. Although some stents have strong supporting force after expansion, the axial flexibility is not good, and the metal surface coverage and axial The shortening rate of some stents is relatively large; although some stents have better axial flexibility, but the radial support force is insufficient, the metal surface coverage is small, and it is easy to cause vascular restenosis, so it still needs to be further improved.

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