Vascular stent

Abstract

The present invention provides a blood vessel support. Said support is made up by engraving an elastic metal tube material, it includes several net rings which are arranged along axial direction and are formed from prismatic basic units, between every two adjacent net rings they are connected by means of several Y-shaped connecting pieces.

Description

technical field [0001] The invention relates to a medical device, in particular to a blood vessel stent 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 vascular stent design should have the following technical indicators at the same time: sufficient radial support force, go...

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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