Covered stent, manufacturing method thereof and sheath tube

Abstract

The present application discloses a stent graft, which includes a plurality of support frames and a film covered on the support frames to jointly form a tubular structure. In the axial direction of the tubular structure, any two adjacent support frames are A flex gap is left to allow the membrane to flex and fold. When the stent graft provided by the present invention is bent in a blood vessel, the bending part is a bending gap without a support frame, and only the stent graft is bent, and the whole stent graft has axial plasticity, that is, it can be shaped and maintain its own bending shape, so The straightening force generated is very small or even negligible; combined with the flexible sheath for delivery, the stent graft can conform to the bend of the vessel to the greatest extent when it is initially released, so as to significantly reduce the chance of new vascular rupture. The stent graft can also conform to the application of blood vessels with various bending angles, thereby significantly improving the use effect of the stent graft. The present invention also provides a method for manufacturing the above-mentioned stent-graft, and a sheath for delivering the above-mentioned stent-graft.

Description

technical field [0001] The present invention relates to the technical field of medical equipment, in particular to a stent-graft. The present invention also relates to a method for manufacturing the stent-graft. In addition, the present invention also relates to a sheath for delivering the stent-graft. Background technique [0002] When treating vascular diseases such as aneurysms, it is sometimes necessary to perform endovascular repair of aortic dissection to place a stent graft into the patient's blood vessel, so as to achieve the purpose of replacing and isolating the vascular lesion. [0003] The covered stent is composed of a ring-shaped bare metal stent and a membrane. Multiple identical bare metal stents are coaxially arranged, and the membrane is coated on the outside or inside of all the bare metal stents, thereby forming a tubular component, which is used to replace Diseased blood vessels divert blood. In the prior art, the stent-graft is generally an elastic str...

AI Technical Summary

Problems solved by technology

In the prior art, the sheath tube is also generally a linear tubular part, and when it is inserted into the blood vessel, it will also generate a straightening force like a stent graft, so during the delivery and release of the stent graft, it will also There is a safety risk of new blood vessel breaks

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