Covered stent system and usage method thereof

Abstract

The invention discloses a covered stent system which comprises a mandrel, a functional tube, a self-expanding covered stent and an outer sleeve. The mandrel is arranged in the functional tube and comprises a mandrel body, a first developing ring and a first support hook ring, and the first developing ring and the first support hook ring are sequentially arranged at the front end of the mandrel body; the functional tube comprises a tube body, and a second stent hook ring, a second developing ring, a balloon developing ring, an expansion balloon and a functional tube seat which are sequentially arranged on the tube body; a liquid injection opening is formed in the functional tube seat; one end of the self-expanding covered stent is connected with the first stent hook ring, and the other end of the self-expanding covered stent is connected with the second stent hook ring; and the outer sleeve is arranged outside the self-expanding covered stent and the functional tube. The invention further provides a usage method of the covered stent system. The device can adapt to blood vessels with different diameters, tearing of the blood vessels can be avoided, and a secondary dilation operation is not needed.

Description

technical field [0001] The invention belongs to the field of medical devices, and in particular relates to a covered stent system and a method for using the same. Background technique [0002] Intracranial aneurysm is an abnormal bulge formed by the gradual expansion of intracranial artery due to congenital dysplasia or acquired injury and other factors leading to local damage to the vascular wall. At present, the surgical treatment of intracranial aneurysm mainly includes craniotomy clipping and endovascular interventional therapy. [0003] The principle of stent-graft in the treatment of intracranial aneurysm is to insert a stent with a bio-physical barrier into the parent artery, in order to keep the parent artery unobstructed, isolate the aneurysm and form a thrombus inside, so as to achieve a cure for the disease. Objective, it has great advantages in the treatment of wide neck, giant, dissection or pseudoaneurysm without important branch vessels adjacent to it. The o...

AI Technical Summary

Problems solved by technology

This kind of stent has the following problems: it cannot be adjusted, and it cannot be applied to various blood vessels; the stent is not released in place and cannot be adjusted, resulting in tearing of the blood vessel. , resulting in tearing of the vessel wall or tearing and damage of the branch arteries at the part, leading to fatal bleeding; poor apposition, requiring a second expansion operation

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