Branched sheath and blood vessel stent conveying and release device applying same

Abstract

The invention discloses a branched sheath and a blood vessel stent conveying and release device applying the same. The branched sheath comprises a support skeleton, at least two branched sheath constraint lines and a first tectorial membrane sleeve, wherein the first tectorial membrane sleeve is a cylindrical sleeve of which one end is provided with a conical pipe, and the top end of the conical pipe on the first tectorial membrane sleeve is fixed with the support skeleton; one end of each branched sheath constraint line is fixed with the support skeleton in the first tectorial membrane sleeve, and the position where the branched sheath constraint lines are fixed with the support skeleton corresponds to that of the conical pipe; the first tectorial membrane sleeve on the branched sheath is designed by using a flexible sheath, the sleeve is formed by sewing a tectorial membrane material to constrain a branched blood vessel stent to reduce the diameter of the branched blood vessel stent during installation, so that release resistance is reduced; and by the flexible first tectorial membrane sleeve, the branched blood vessel stent is easy to guide into a large-angle branched blood vessel accurately, and when the branched blood vessel stent is pulled out of the branched blood vessel, vascular injury is also avoided to the maximum limit due to small external diameter.

Description

technical field [0001] The present application relates to the technical field of medical devices, in particular to a branch sheath and a stent delivery and release device using the branch sheath. Background technique [0002] The traditional intravascular stent release method is to pre-press the stent into the outer sheath. When releasing, the outer sheath is withdrawn, and the stent segments bounce off segment by segment. The effect of blocking hemangioma or breach. [0003] When there are lesions in some blood vessels with side branches, such as ascending aortic aneurysm, arch aneurysm, descending aortic aneurysm and dissection lesions in the above parts, it is necessary to deliver vascular stents with side branches or side holes to the lesion site for treatment. At this time, if the traditional stent release method is adopted, during the operation, it is necessary to completely align the side branches or side holes on the stent with the branch vessels on the diseased ve...

AI Technical Summary

Problems solved by technology

At this time, if the traditional stent release method is adopted, during the operation, it is necessary to completely align the side branches or side holes on the stent with the branch vessels on the diseased vessel, especially some branch vessels with large angles, usually Difficult, even with external instruments, cannot be done well, and once the side branches or side holes on the stent cannot be aligned with the branch vessels on the diseased vessel, the entire operation will fail

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