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Vascular stent

A vascular stent and tube technology, applied in the field of vascular stents, can solve the problems of large metal surface coverage and axial shortening rate, insufficient radial support force, and difficulty in achieving unity, and achieve good axial flexibility and vascular compliance. stability, reduction of the possibility of relative rotation, the effect of moderate metal surface coverage

Active Publication Date: 2007-06-13
SHANGHAI KANGDELAI ENTERPRISE DEV GRP CO LTD
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  • Abstract
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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.

Method used

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  • Vascular stent

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Embodiment Construction

[0016] Referring to Fig. 1, the vascular stent of the present invention is carved from an elastic metal tube, and the stent includes a plurality of mesh rings 1 composed of elliptical basic units 11 arranged in the axial direction, and a plurality of mesh rings are passed between adjacent mesh rings. The inclined S-shaped connectors 2 are connected. The ratio of the long diameter and the short diameter of the elliptical basic unit 11 is 3: 2, and each elliptical basic unit 11 that forms the mesh ring 1 is connected along the short diameter direction of the ellipse. The elliptical basic units are arranged in a staggered and corresponding form. The S-shaped connector 2 is connected between two adjacent elliptical basic units 11 of two adjacent mesh rings 1, and its connection point is on the protruding point of the elliptical basic unit. The inclination directions of the multiple S-shaped connectors 2 between the basic units are the same, and the multiple S-shaped connectors 2 ...

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Abstract

The present invention relates to a blood vessel support. It is made up by using elastic metal tube material through an engraving process. Said support includes several net-rings which are arranged along axial direction and formed from elliptic basic units. After having been expanded said blood vessel support not only can retain higher radial supporting force, but also has good axial flexibility and blood vessel compliance.

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...

Claims

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Application Information

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IPC IPC(8): A61F2/06A61B17/00A61M29/00A61F2/90
Inventor 张宪淼张维鑫李军生
Owner SHANGHAI KANGDELAI ENTERPRISE DEV GRP CO LTD
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