Multi-channel membrane-coated intravascular stent and preparation method thereof

Abstract

The invention relates to a multi-channel membrane-coated intravascular stent and a preparation method thereof. A multi-channel intravascular stent is coated with a membrane and comprises a stent body, wherein the surface of the stent body is coated with a polytetrafluoroethylene membrane; the polytetrafluoroethylene membrane is prepared by electrospinning the surface of the stent body with a polytetrafluoroethylene solution; the polytetrafluoroethylene solution comprises polytetrafluoroethylene and perfluor-paraffin; and the concentration of the polytetrafluoroethylene is 1-30g / ml. Compared with the prior art, the polytetrafluoroethylene layer clads the surface of the stent body; the performance of the coating is similar to that of expanded polytetrafluoroethylene; and the coating can be processed into various shapes such as barrels, circles and curved surfaces, thus the multi-channel intravascular stent is suitable for complicated arterial aneurysm treatment; and the achievement ratio of an operation is improved.

Description

technical field [0001] The invention relates to a multi-channel vascular stent graft, and also relates to a preparation method of the multi-channel vascular stent graft. Background technique [0002] The aorta is the largest blood vessel in the human body. The blood reaches the tissues and organs of the whole body through the aorta and its branches, providing oxygen and various nutrients that people need for life, work and study. Aortic aneurysm refers to the abnormal enlargement of the aorta or the rupture of the intimal layer and the separation of the middle layer, and blood enters the artery wall to form a dissection. Although it is not the same as the tumor that people usually talk about, it is not a mass formed by abnormal tissue growth. Metastasis, but the threat to health and its dangers are far greater than tumors, and some people call it an "indeterminate time bomb" in the body. For example, 50% of patients with dissected aortic aneurysm caused by separation of aort...

AI Technical Summary

Problems solved by technology

[0006] Expanded polytetrafluoroethylene (expanded PTFE) is a new type of medical polymer material, which is made of polytetrafluoroethylene resin through special processing methods such as stretching. It can be used in the field of suitable membrane materials, and the membrane materials prepared by it can only be used on a flat surface. If it is bent, it needs to be folded in multiple layers, and there are interfaces. It is used as a multi-tube stent covering, which is not suitable for complicated aneurysm treatment. The success rate of the operation very low

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