Delivery and release system of covered stent

Abstract

The invention discloses a delivery and release system of a covered stent, which comprises an outer tube, a top tube, an inner tube, a guide wire bushing, a conical head, a control coil, a control guide wire and a guide wire flexible buckle, wherein the outer tube, the top tube and the inner tube are sequentially distributed from the outer side to the inner side, and a guide wire hole is arranged on the top tube; one end of the inner tube extends out of the top tube and is fixed with the conical head, and the control coil is arranged on the conical head; the guide wire bushing is sleeved on the inner tube which is between the top tube and the conical head; one end of the control guide wire is fixed with the outer tube, the other end of the control guide wire penetrates through the guide wire hole, the guide wire bushing and the movable buckle of the control coil to be connected with the conical head, and the guide wire flexible buckle is arranged on the control guide wire. When the system releases the covered stent, part or a whole covered section can be released under the condition that the end part of the covered stent is bound, so the probability of covered stent displacement or exposed section overturning which is caused by blood flow impact is reduced. In addition, when a near end is not released, the covered stent also can be adjusted, so the stent is positioned more accurately.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to a stent graft delivery and release system. Background technique [0002] In vascular interventional surgery, it is often necessary to implant vascular stents into human blood vessels to achieve interventional treatment of vascular diseases. However, in the vascular interventional operation, when the vascular stent is delivered and released, the existing pulling release method does not have any constraints on the proximal and distal ends of the stent. The impact of blood flow leads to shifting or turning of bare segments, especially in the aortic arch or large blood vessels near the heart, the probability of shifting or turning of bare segments is greater; another existing ligature Although the release method is from the middle of the stent to the two sections, it will not cause the bare section to turn over, but the position of the stent cannot be adjusted afte...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the embodiment of the present application provides a stent-graft delivery and release system to solve the problem that the existing stent is displaced or the bare segment is turned over when it is released

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