An in-situ fenestration positioning device for a vascular covered stent

Abstract

The invention relates to a positioning device for in-situ windowing of an endovascular stent-graft. The positioning device comprises a push piece, a conveying sheath and a guiding wire, wherein a first through hole is formed in the push piece, a first magnetic piece is arranged at the first end of the push piece, and a guiding wire hole communicated with the first through hole is formed in the first magnetic piece; a second through hole is formed in the conveying sheath, a second magnetic piece is arranged at the first end of the conveying sheath, a third through hole communicated with the second through hole is formed in the second magnetic piece, and the first magnetic piece is connected with the second magnetic piece in a magnetic attracting manner; and the guiding wire is used for conveying the first magnetic piece and the second magnetic piece. The positioning device provided by the invention has the benefits as follows: after folding of the magnetic pieces, windowing is achieved through guided laser burning punching or a puncture needle method, the step of windowing is simplified, operating difficulty and risks are lowered, the operation time is saved, equipment customization is avoided, and moreover, the operation cost is lowered.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to an in-situ fenestration positioning device for a vascular covered stent, in particular to an in-situ fenestration positioning device for a large and medium-sized artery stent-graft. Background technique [0002] With the advent of an aging society and the high incidence of smoking, high blood pressure and other diseases, the occurrence of aortic aneurysm-like dilation or dissection is increasing. In the past, thoracotomy or laparotomy was necessary. , and has been widely recognized by the field of vascular surgery and interventional science. Stent-graft implantation is a very important means of treating large and medium-sized arteries at present. Although it is expensive, it is still widely used clinically. It is used in nearly 1 million cases worldwide every year, but it faces difficulties in the preservation of complex lesions, such as important branch arteries involvin...

AI Technical Summary

Problems solved by technology

[0003] At present, one of the technologies involved in preserving branch arteries is a custom-made stent for patients. The covered stent graft with branch arterial stents is designed and manufactured at the factory. The cycle is long, which takes about three months, and the operation is difficult and the practicability is poor. The other is to open the window of the covered stent before the operation, which needs to be closely combined with the preoperative CT imaging, so that no errors can occur, and after the window is opened, the covered stent needs to be returned to the stent guide sheath. Due to the addition of marking metal rings, etc., it is difficult to retract, and the stent may be damaged after being forced back, and then the stent may be broken and accidentally released after entering the human body, resulting in catastrophic consequences. , it is very likely to cause poor alignment, and then occlusion and stenosis of branch vessels and no alignment at all.

Images