Aorta covered stent

Abstract

The invention provides an aorta covered stent. The aorta covered stent comprises a main stent, the main stent comprises a main stent body, the main stent body is provided with at least one concave part, a main stent membrane covers the main stent body, and the main stent membrane of the concave part is provided with at least one through hole for a branch arterial stent to stretch into the main stent. The aorta covered stent can be used for treating aortic aneurysm or aortic dissection, internal hemorrhage can be effectively reduced, branch blood flow clogging can be effectively prevented, andthe operation is also convenient.

Description

technical field [0001] The invention relates to an aortic covered stent for treating aortic aneurysm or aortic dissection. Background technique [0002] In recent years, minimally invasive endovascular treatment techniques in vascular surgery have made great progress, and vascular stents have been widely used in the treatment of systemic vascular diseases. According to the distribution of lesions, different vascular stents can be mainly used for peripheral vascular lesions, small artery lesions, and aortic lesions; depending on the pathology, different vascular stents can be used for vascular traumatic lesions, vascular stenosis or restenosis Wait. [0003] For aortic lesions, such as aortic aneurysm and aortic dissection, aortic stent grafts are mainly used at present. [0004] In the prior art, in order not to affect the blood supply of important branch vessels while isolating the breach, a chimney stent is usually added outside the aortic stent graft to form a blood sup...

AI Technical Summary

Problems solved by technology

However, such a design has the following limitations: ①During use, the chimney stent is located between the aortic stent-graft and the inner wall of the aorta, causing the aortic stent-graft to not stick firmly to the wall, thereby causing endoleaks; ②due to The elastic tension of the aortic stent graft is stronger than that of the chimney stent, and it is easy to compress the chimney stent for a long time during use, resulting in a smaller cross-section of the blood flow channel formed by the chimney stent or occlusion of the blood flow channel, thereby affecting the blood circulation of important branch vessels and causing the body Ischemia of related parts; ③During the operation, due to the special structure between the chimney stent and the aortic covering, it is difficult for the doctor to place the guide wire and introduce the chimney stent

However, this design also has the following limitations: ① the stent needs to be customized according to the specific anatomy of the patient, which is expensive and cannot be mass-produced, nor can it be used for emergency surgery patients; ② the operation is complicated, and the stent requires a hole on the window Accurately align the branch vessels respectively, any deviation may lead to blockage of blood flow in the branch vessels

Although this aortic stent can reconstruct branch blood flow, avoid endoleakage of the main aortic covered stent, and avoid custom-made stents, it is difficult for doctors to introduce the guide wire of the branch arterial stent during the operation. So that the branch artery stent can be accurately divided into the inner chimney stent

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