Stent for treating type B aortic dissection

Abstract

The invention belongs to the crossed field of medicine and engineering, and relates to the production and manufacturing of a novel stent for treating type B aortic dissection. An aortic stent is of aconical structure; the proximal end is completely covered by a film coating stent; no metal bare stent is used; a material capable of slowly expanding when meeting blood covers the outer side of the film coating stent; the 1 to 2cm position, near the big bent side, of the stent is formed by small woven V-shaped stent units through connection; the remote end of the big bent side is formed by big woven V-shaped stent units through connection; the small bent side of the stent is formed by small V-shaped stent units through connection. The aortic film coating stent system can adapt to the anatomical structure of the Stanford type B aortic dissection, particularly the Stanford type B aortic dissection involving with left subclavian artery due to proximal anchoring area deficiency; a breaking opening of the aortic dissection can be completely isolated; the application to various normal and deformation blood vessels can be realized; the application range is wide; the stent customization is avoided; the mass production can be realized.

Description

technical field [0001] The invention belongs to the technical field of medical auxiliary equipment, and in particular relates to a novel stent for treating type B aortic dissection. Background technique [0002] Aortic dissection is a disease that threatens human life. Aortic dissection refers to that after the intima and media of the aorta are damaged, blood enters the media of the aortic wall through the torn intima, resulting in peeling of the vessel wall and the formation of a false lumen. With the impact of blood flow, the vascular dissection gradually extended and showed tumor-like expansion. Aortic dissecting aneurysm can cause pericardial hemorrhage and cardiac tamponade, and even large vessel rupture and bleeding lead to sudden death of the patient. In recent years, the data show that its incidence rate has an upward trend, and its annual incidence rate exceeds 30 / 1 million people. If not treated in time, the 30-day mortality rate of patients with Stanford type B...

AI Technical Summary

Problems solved by technology

Traditional aortic stent implants often have bare metal stents and barbs at the proximal end. When implanted in patients with aortic dissection and aneurysm, the bare metal stents and barbs may puncture the aortic vessel and cause vessel rupture. death etc.

For aortic stents without bare metal stents and barbs, the greater curvature often has a small "V"-shaped stent unit connection structure, and the connection is relatively dense, which makes the surgical procedure of in situ fenestration involving the upper arch branches too complicated and reduces the It reduces the success rate of in situ fenestration surgery and increases the complications of the central nervous system, prolongs the operation time of the operation, and increases the risk of the operation

Moreover, the proximal and distal ends of the stent are not tightly fitted to the stent, which increases the chance of intraoperative and postoperative endoleaks

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