Covered stent for reconstructing aortic arch and branches thereof

Abstract

The invention relates to a covered stent for reconstructing an aortic arch and branches thereof, which belong to the technical field of medical instruments. The stent is arranged in an aortic arch and branch blood vessels of the aortic arch and comprises an in-aortic covered stent body, a covered stent body with branches and an in-aortic bare stent body. The periphery of the in-aortic bare stent bodyis sleeved with a in-aortic covered stent body; the in-aortic covered stent body is cylindrical, an opening is formed in the side wall, one end of the covered stent body with the branches is clamped between the in-aortic covered stent body and the in-aortic bare stent body at the opening, and the other end of the covered stent body with the branches is provided with branch parts arranged in aortic arch branch blood vessels respectively. Physiological in-situ reconstruction can be carried out on diseased regions which relate to aortic arches and involve unknown arteries and left common carotid arteries; thesurgical trauma is small, and each stent is naturally connected according to a physiological structure and is tightly combined.

Description

technical field [0001] The invention relates to a covered stent for reconstructing the aortic arch and its branches, and belongs to the technical field of medical devices. Background technique [0002] There are three branches from the aortic arch, from the proximal end to the distal end: the innominate artery, the left common carotid artery, and the left subclavian artery. While implanting a covered stent to cover the arch lesion (dissection or aneurysm), it may be necessary to cover the innominate artery and the left common carotid artery. Because these two blood vessels supply the brain, they must be preserved and must be reconstructed. At present, the reconstruction of the innominate artery and the left common carotid artery usually adopts the following methods: 1. Thoracotomy from the ascending aorta to bypass the three branches, which causes great trauma. 2. "Chimney" technique, that is, to cut or puncture the bilateral carotid arteries while placing the covered stent...

AI Technical Summary

Problems solved by technology

At present, the reconstruction of the innominate artery and the left common carotid artery usually adopts the following methods: 1. Thoracotomy from the ascending aorta to bypass the three branches, which causes a lot of trauma

2. "Chimney" technique, that is, to cut or puncture the bilateral carotid arteries while placing the covered stent in the aorta Parallel, although this method is simple to operate, it is mostly used in emergencies, because the incidence of endoleak is too high and multiple stents are crowded in the aorta at the stent opening, which is easy to wear the aorta, causing secondary damage and branch stents being compressed by large stents prone to occlusion

4. In situ fenestration technology, this method can be used in various lesions, but if the branch angle is too parallel to the aorta, it is difficult for the puncture needle to be perpendicular to the large stent covering when the branch vessel is reversely punctured through the aortic stent. The disadvantage is that the stent membrane in the aorta is forcibly expanded by the balloon after the puncture, and the branch covered stent is implanted after expansion, but the endoleakage between the branch covered stent and the large stent is easy

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