Delivery system for novel bioresorbable slide fastener scaffold

Abstract

The invention provides a transcatheter delivery device for delivering a novel slide fastener scaffold to a narrow lumen. The device consists of an outer sleeve, an inner sheath and a sacculus catheter, wherein the outer sleeve is provided with a near end, a far end and an inner cavity extending between the two ends; the inner sheath is also provided with a near end, a far end and an inner cavity extending between the two ends; the outer diameter of the inner sheath ensures that the inner sheath is slidably inserted into the cavity of the outer sleeve; the sacculus catheter is also provided with a near end, a far end and an inner cavity; the outer diameter of the sacculus catheter ensures that the sacculus catheter is slidably inserted into the cavity of the inner sheath; the far end of the sacculus catheter is provided with a sacculus, and the length and diameter of the sacculus can be selected according to the requirement of the scaffold; two ends of the sacculus are respectively provided with a metal marker for assisting positioning the scaffold; the far end of the sacculus is attached with a tapered body which can prevent the scaffold from sliding to the far end, and the near end part of the tapered body can be inserted into the outer sleeve, so that the tapered body and the outer surface of the outer sleeve are kept on the same horizontal plane; and the inner sheath is slightly shorter than the sacculus catheter, and directly reaches the near end of the sacculus of the sacculus catheter, so the scaffold can be prevented from sliding to the near end.

Description

Technical field: [0001] This patent relates to a delivery device for implanting a non-self-expanding sliding buckle stent across the lumen through a catheter, which is used to expand the narrow parts of the blood vessel, trachea, esophagus, urethra, bile duct and other organs. technical background: [0002] In the field of interventional therapy, for the stenosis of blood vessels, trachea, esophagus, urethra, biliary tract and other organs, stents are usually implanted to expand the stenosis and effectively maintain the smoothness of the lumen. The stent is introduced into the lumen in the unexpanded state and positioned at the stenosis, then expanded and placed there. [0003] Traditionally, stents can be divided into two types according to their expansion mechanism: one is a self-expanding stent called self-expanding stent. This kind of stent material is mainly a shape memory alloy and polymer; the stent is compressed in advance. When the inner and outer catheters of the inserte...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the delivery problem of this new type of stent, and provide a transcatheter delivery device. The device adopts the method of combining the outer sleeve and the balloon catheter, so that the outer layer of the stent will not bounce off before the expansion of the stent. The stent can be positioned accurately, and the stent can be fully expanded by dilating the balloon

Images