Stent anchoring area moving down device

Abstract

The invention provides a device for moving down an anchoring area of ​​a stent, relates to the technical field of medical instruments, and comprises an outer layer skeleton and an inner layer guide. Wherein: the outer skeleton is tubular as a whole, including a diameter-expanding section whose diameter gradually increases from the proximal end to the distal end; the radial circumferential surface of the expanding-diameter section is covered and connected with a film. The inner guide includes a proximal guide; the proximal guide adopts a stent graft or a membrane; the proximal end of the proximal guide is connected to the proximal edge or the proximal inner peripheral surface of the proximal connection; the proximal guide There is a first guide cavity on it. In the implanted state: the outer skeleton runs through the tumor cavity, and the outer skeleton is fixed inside the tumor cavity through the support and fixing part set on the outer skeleton, the diameter-expanding section is located inside the tumor cavity, and the outer peripheral surface of the expanding diameter section is attached to the tumor cavity inner surface of the proximal cavity. The present invention at least alleviates the technical problems existing in the prior art: when the abdominal aortic aneurysm is treated by the EVAR technique, complications such as displacement and Type Ia endoleak easily occur after the grafted stent is implanted.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a device for moving down an anchoring area of ​​a stent. Background technique [0002] At present, in the treatment of abdominal aortic aneurysm by EVAR technology (Endovascular Aneurysm Repair, EVAR, endovascular repair), if the anchoring area of ​​the stent is insufficient or the angle of the tumor diameter is too large, migration of the stent graft after implantation is very easy. Complications such as position and type Ia endoleak will lead to continued arterial blood perfusion in the abdominal aortic aneurysm, and the blood pressure on the aneurysm vessel wall will greatly reduce the postoperative effect of EVAR surgery, and even cause EVAR surgery to fail. Contents of the invention [0003] The purpose of the present invention is to provide a device for moving down the stent anchoring area, which at least alleviates the problems existing in the prior art: when the...

AI Technical Summary

Problems solved by technology

[0002] At present, in the treatment of abdominal aortic aneurysm by EVAR technology (Endovascular Aneurysm Repair, EVAR, endovascular repair), if the anchoring area of ​​the stent is insufficient or the angle of the tumor diameter is too large, migration of the stent graft after implantation is very easy. Complications such as position and type Ia endoleak will lead to continuous arterial blood perfusion in the abdominal aortic aneurysm, and the wall of the aneurysm still has to bear blood pressure, which will greatly reduce the postoperative effect of EVAR surgery, and even cause EVAR surgery to fail.

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