Covered stent and preparation method thereof

Abstract

The invention provides a covered stent and a preparation method thereof. The covered stent comprises a stent body and a covered pipe material which sleeves the stent body, wherein the covered pipe material is in a retracted state and is fitted to an outer surface of the stent body; the covered pipe material can be tightly fitted to the surface of the stent without the need of additional sewing and spinning processes and the like; one covered pipe material can be applicable to stents with different specifications, so that the applicability of the covered stent is improved; only one layer of the stent and one layer of the covered pipe material are adopted, so that the outer diameter size of the covered stent is small and the trafficability and smoothness of the covered stent are improved. The invention further provides the preparation method of the covered stent; the stent body, which is sleeved with the covered pipe material, is put into a medium with pre-set temperature, and the covered pipe material is retracted and fitted to the outer surface of the stent body, so that the covered stent can be prepared before surgeries; multi-specification goods preparation is not needed, and the cost of clinical goods preparation is low.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a covered stent and a preparation method thereof. Background technique [0002] Common vascular diseases include aneurysms, ruptured blood vessels, perforated blood vessels, and narrowed blood vessels. Aneurysm is caused by the thinning of arterial wall due to disease, injury or congenital factors. Under the impact of blood flow, the weak blood vessel gradually protrudes outward into a circular shape, and then becomes an aneurysm, which will compress the surrounding tissue organ. Moreover, the continuous growth of the aneurysm may cause the rupture of the aneurysm blood vessel, acute bleeding, and life-threatening. [0003] Endovascular interventional therapy has the advantages of less trauma, less complications, high safety, and less pain for patients, and has gradually become the main method for aneurysm treatment. Among them, the stent graft method is a commonly use...

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