Aortic dissection aneurysm covered stent

Abstract

The invention provides an aortic dissection aneurysm covered stent which comprises a cylindrical metal supporting portion and a cylindrical covered portion coated on the cylindrical metal supporting portion. A bulging covered portion is coated outside the cylindrical covered portion, and the middle portion of the bulging covered portion bulges outwards. By adopting the above structure, a false lumen crevasse can be sealed and isolated, space of a false lumen can be actively reduced, blood flow speed and blood flow in the false lumen can be changed, and the false lumen is ensured to quickly form thrombus within expected time; the outwards-bulging portion can effectively prevent displacement and sliding caused by blood flow impact after the stent is implanted in a human body, and disease relapse caused by exposure of an original aortic crevasse due to displacement of the stent is avoided.

Description

technical field [0001] The invention relates to a covered stent, in particular to an aortic dissection aneurysm covered stent. Background technique [0002] The incidence of aortic dissection in China ranks first in the world. The structure of aortic dissection is complex and diverse. At present, interventional therapy is mostly used in clinical practice. The covered stent is the main device for interventional therapy. It is implanted through the delivery system. At the lesion site, by isolating and shunting the true and false lumens of the dissecting aneurysm, the complete blood supply of the true lumen is restored, and the thrombus gradually organizes in the false lumen, thereby greatly reducing the risk of false lumen rupture and achieving the purpose of treatment. After the first breach of aortic dissection is completely isolated, the organization of thrombus in the false lumen will be gradually completed during the recovery process after treatment. Multiple breaches, a...

AI Technical Summary

Problems solved by technology

After the first breach of aortic dissection is completely isolated, the organization of thrombus in the false lumen will be gradually completed during the recovery process after treatment. Multiple breaches, and the distal breaches are often close to important branch arteries, which makes it impossible to perform occlusion treatment, and most of them are treated conservatively

After the upper main breach is sealed and isolated, there is still blood flow in the false lumen, which is caused by the reflux of the distal breach. Because the blood flow pressure in the false lumen still exists, it seriously affects the organized thrombus in the false lumen. Formation

Because thrombus organization in the false lumen is another therapeutic purpose after the stent graft is used to seal and isolate the aortic dissection aneurysm, the main function of the current stent graft design is to seal and isolate the opening of the false lumen, and there is no The role of actively helping the formation of organized thrombus in the false lumen

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