Windowing method and device of covered stent

Abstract

The invention discloses a windowing method and device of a covered stent. The device comprises a guide device and a puncture needle, wherein the guide device comprises a conveying sheath tube and an expander or an adjustable bent sheath tube and an expander; the outer wall of the expander is in match with the conveying sheath tube or the adjustable bent sheath tube; the guide device is conveyed along a guide wire to the outer wall of a position to be holed of the covered stent; a second guide wire chamber is formed in the puncture needle, and the puncture needle is conveyed along protecting a guide wire to the sidewall of the covered stent; a needle head can be bulged from the end part of the conveying sheath tube or the adjustable bent sheath tube. According to the scheme, the device has the advantages that the guide device and the puncture needle are matched with each other to hole in a specified position on the covered stent, and then the hole formed in the covered stent by the puncture needle can be expanded to reach the size as required through a hole expanding device, so that blood in branch vessel and aorta can flow smoothly, and as a result, the covered stent can be applied to the circumstance that aortic diseases occur in multi-branch vessels, accumulate in multi-branch vessels or excessively close to multi-branch vessels.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a method and device for opening a stent-graft window. Background technique [0002] Vascular disease has become one of the main reasons that threaten human life, and it is generally difficult to heal itself after the occurrence of vascular disease. If proper and timely treatment is not carried out, it will lead to blood vessel rupture and bleeding or even death. [0003] For diseases such as aortic aneurysm and aortic dissection in aortic diseases of vascular diseases, the current surgical treatment methods mainly include open surgery and endovascular repair. Among them, endovascular repair refers to transarterial puncture or small incision. The covered stent is implanted in the aorta to isolate the diseased cavity and reconstruct the blood flow path in situ. Compared with open surgery, endovascular repair does not require thoracotomy or laparotomy, has less trauma and re...

AI Technical Summary

Problems solved by technology

[0005] Although there has been an attempt to add a chimney stent to the existing covered stent, the surgical operation is difficult, and problems such as endoleak, stent collapse, or stent occlusion are prone to occur, making it difficult to popularize

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