Vascular stent and built-in branch stent thereof

Abstract

The invention provides a vascular stent which includes a built-in branch stent and at least one branch tube. The built-in branch stent includes a body tube, the body tube includes a body coated film,and the body coated film is provided with at least one opening window opening. The built-in branch stent further includes at least one built-in branch tube disposed in an inner cavity of the body tube, the at least one built-in branch tube extends from the at least one opening window toward the inner cavity of the body tube, the angle between the axis of the built-in branch tube and the axis of the body tube is greater than 0 degree, and the proximal end of the branch tube penetrates through the opening window and is connected into the built-in branch tube of the built-in branch stent in an inserted mode. The invention further provides the built-in branch stent of the vascular stent.

Description

technical field [0001] The invention relates to the technical field of implantable blood vessels, in particular to a blood vessel stent with an embedded branch stent and the embedded branch stent of the blood vessel stent. Background technique [0002] Aortic aneurysm refers to the local or diffuse abnormal expansion of the aortic wall, which compresses the surrounding organs and causes symptoms, and tumor-like rupture is its main risk. It often occurs in the ascending aorta, aortic arch, descending thoracic aorta, thoracoabdominal aorta, and abdominal aorta. According to the structure, aortic aneurysm can be divided into true aortic aneurysm and false aortic aneurysm. The aortic aneurysm causes an increase in the inner pressure of the blood vessel, so it is progressively enlarged. If it develops for a long time, it will eventually rupture. The larger the aneurysm, the greater the possibility of rupture. According to statistics, without surgical treatment, 90% of thoracic ...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, stents commonly used in the treatment of arterial branches include chimney stents, integrated multi-branch stents, and fenestrated stents. These stents are limited by the structure of the stent and often require temporary customization, or are prone to problems such as endoleaks, especially For some branches with relatively small connection angles, when the branch stent connects the branch vessel and the main stent, there is often a large bending angle, so that the branch stent is squeezed by the main stent and blocked

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