Branched Vascular Stent

Abstract

The invention relates to the technical field of interventional medical devices, in particular to a branched blood vessel stent. The invention provides a branched vascular stent, which has shape memory characteristics, and includes a main tube, a long branch tube and a short branch tube that are all hollow inside, the proximal end of the long branch tube is connected to the distal end of the main tube of the stent and Connected, the long branch pipe is provided with a bend pipe, in the expanded configuration, the bend pipe and the extension line of the edge of the bracket main pipe away from the bend pipe form a bending area, and one end of the short branch pipe is set at the bend area and communicate with the inside of the elbow. The present invention forms a bending area by arranging a section of bent tube on the long branch tube, and arranges the short branch tube in the bending area, so as to avoid the phenomenon that the short branch tube cannot be expanded due to being squeezed by blood vessels.

Description

technical field [0001] The invention relates to the technical field of interventional medical devices, in particular to a branched blood vessel stent. Background technique [0002] This section provides background information related to the present disclosure only and is not necessarily prior art. [0003] Hypertension (hypertension) refers to a chronic disease characterized by an increase in systemic arterial blood pressure (systolic and / or diastolic) (systolic blood pressure ≥ 140 mm Hg, diastolic blood pressure ≥ 90 mm Hg). The incidence of blood pressure has risen sharply, and the incidence of other diseases related to arteries (such as aneurysm) has also shown a significant upward trend. With the development of medicine, straight tubular stent grafts are generally used to treat aneurysms. In the process of treating aneurysms, the compressed straight tubular stent grafts are first loaded into the delivery system, and then The stent graft is delivered to the position of...

AI Technical Summary

Problems solved by technology

However, when the branched stent is implanted at the aneurysm 7 of the right internal iliac artery 2, there is not enough space on the side of the right internal iliac artery for the short branch 113 to expand, so when the branched stent is implanted into the aneurysm 7 of the right internal iliac artery. When there are 7 aneurysms, the short branch 113 is easily compressed by the wall of the right common iliac artery 1 and the branched vascular stent, resulting in insufficient expansion or even complete closure of the short branch 113

When the short branch 113 is insufficiently deployed or completely closed and the channel of the right internal iliac artery 2 needs to be reconstructed, a right internal iliac artery stent needs to be implanted. However, the operation of implanting the right internal iliac artery stent through the short branch 113 is very complicated, and may even leading to the failure of the entire implant surgery

[0006] In this regard, it is necessary to propose a new branched vascular stent in view of the technical problem that the short branch is squeezed by the wall of the blood vessel after the existing branched vascular stent is implanted into the blood vessel, resulting in insufficient expansion or even complete closure.

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