SHORT SHEATH DELIVERY SYSTEM FOR BILIARY METAL STENT VIA ENDOSCOPE

摘要

The invention discloses a short sheath delivery system for a biliary metal stent via an endoscope. The short sheath delivery system comprises a delivery device for a stent and a fixing device, wherein the delivery device is used for delivering a stent part on a stricture lesion via an endoscope along a guidewire; the fixing device is used for fixing the delivery device on an endoscope biopsy port. The delivery device comprises a tip, an inner rod, a secondary rod, a main rod, a sliding rod, a trailing end, a guidewire cavity, an injection tube, a stent, a short sheath, a connection thread and a handle; the stent is preloaded in an empty cavity formed by the inner rod and the short sheath; the length of the short sheath is longer than that of the stent, and is less than that of the secondary rod; the external diameter of the secondary rod is less than the inner diameter of the short sheath, and the external diameter of the main rod is equal to or greater than that of the short sheath; the handle is sleeved around the sliding rod; and the handle is connected with the short sheath by the connection thread. When the short sheath delivery system is operated, the fixing device fixes the main rod part of the delivery device on the endoscope biopsy port, and an operator pulls the handle by a single hand therefore the handle slides along the sliding rod; the connection thread drives the short sheath to move and to sleeve on the secondary rod, therefore the stent is accurately deployed by a single-person without any migration.