Partial covering film vascular stent

Abstract

The invention discloses a partial covering film vascular stent. The partial covering film vascular stent comprises a bare stent body and a covering film. The bare stent body is partially covered with the covering film, wherein the covering film accounts for 1 / 2 to 3 / 4 of the circumferential surface area the bare stent body. At least one first X-ray-impermeable marking point is arranged on the middle horizontal line of the covering film. At least two second X-ray-impermeable marking points are arranged on the left edge or the right edge or the upper edge or the lower edge of the covering film. According to the partial covering film vascular stent, the covering film is arranged on the bare stent body in a longitudinally covering mode, an X-ray-impermeable marking point is arranged in the middle of the covering film on the bare stent body, two X-ray-impermeable marking points are arranged on the edge of the covering film, so that the position of releasing the stent is determined, and it is guaranteed that an arterial aneurysm is covered with the covering film side after the stent is released and a branch blood vessel is not covered with the bare stent body.

Description

Technical field [0001] The invention relates to a covered stent, in particular to a partially covered blood vessel stent. Background technique [0002] Aneurysm is a common cardiovascular and cerebrovascular disease. Generally, aneurysm is caused by the local weakening of the arterial vessel wall due to disease, injury or due to congenital factors. Under the impact of blood flow, the weakened arterial vessel wall protrudes outward and gradually Expand to form a sac-like enlargement such as a circle, semicircle, oval or fusiform. An aneurysm will continue to grow under the impact of blood flow, compressing surrounding organs or tissues. In addition, increased blood pressure or other factors may cause the aneurysm to rupture, causing rapid bleeding, which may cause life-threatening. [0003] Aneurysms can occur in different parts of the body, and the more common one is intracranial aneurysms. Intracranial aneurysms are usually caused by congenital defects in the walls of the cere...

AI Technical Summary

Problems solved by technology

However, when there are blood vessel branches around the aneurysm, the branch blood vessels will be completely covered by the covered stent, resulting in occlusion of the branch blood vessels and complications such as ischemia

[0007] Another existing stent-graft has bare stents at both ends, which can avoid covering the branch vessels at both ends of the aneurysm when the stent-graft is implanted. However, when the branch vessels are at the same level as the aneurysm, the stent-graft cannot avoid blockage of branch vessels

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