Aorta covered stent with chimney stent supporting pipe

Abstract

The invention discloses an aorta covered stent with a chimney stent supporting pipe. The aorta covered stent comprises a main stent, at least one supporting pipe for releasing a chimney stent is arranged in the main stent, arranged close to the front end of the main stent and tightly and fixedly connected with the inner wall of the main stent, and the wall of the main stent is provided with a through hole communicated with the supporting pipe. By means of the aorta covered stent of the structure, the at least one supporting pipe is reserved in the aorta covered stent, after the aorta covered stent is released and attached to the wall, the chimney stent is then released by the reserved supporting pipe into important branch blood vessels, and blood flow supplying to the important branch blood vessels is accordingly guaranteed. Due to the fact that the chimney stent is released to the inner side of the aorta covered stent, wall attaching of the aorta covered stent cannot be influenced, and inner leakage can be accordingly and effectively avoided; in addition, the aorta covered stent cannot press the chimney stent, and decreasing of cross sections of blood flow channels or blocking of the blood flow channels formed by the chimney stent can be effectively avoided.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an aortic covered stent with a chimney stent supporting pipe. Background technique [0002] In the present invention, the term "distal end" refers to the end away from the heart along the blood flow direction, and "proximal end" refers to the end close to the heart along the blood flow direction. [0003] With the development of interventional technology, more and more stents are used. Problems that could only be solved by traditional surgical techniques or hybrid techniques, such as dissecting aneurysms at the aortic arch and abdominal aortic aneurysms at the visceral artery, can now be released Aortic stent graft, so as to achieve the purpose of treatment. At present, in order to isolate the breach while not affecting the blood supply of important branch vessels, one or more chimney stents are usually released between the aortic stent graft and the inner wall of the aorta to...

AI Technical Summary

Problems solved by technology

However, there are two disadvantages in this structure at present: 1) the chimney stent is located between the aortic stent graft and the inner wall of the aorta, which causes the aortic stent graft to be not firmly attached to the wall, resulting in endoleaks; 2) due to the aortic stent graft The elastic tension of the stent is stronger than that of the chimney stent. Long-term compression of the chimney stent will cause the cross-section of the blood flow channel formed by the chimney stent to become smaller or blocked, which will affect the blood circulation of important branch vessels and lead to ischemia in relevant parts of the body.

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