Endoscopic transduodenal biliary drainage system

摘要

The invention relate to a new procedure for physiologically draining bile into the duodenum, and provides a biliary drainage system for use in this procedure. The biliary drainage system comprises a puncture needle 2 having a sharp pointed portion 5 at a distal end thereof, an expandable metallic stent 1 provided on a distal end portion of the needle 2, and a delivery sheath 3 having the stent 1 enclosed therein in a contracted state. The system is useful for a surgical method comprising endoscopically puncturing the gallbladder 7 with the sharp pointed portion 5 of the needle 2 from the duodenum 6 while passing a highfrequency current through the needle 2, thereafter pulling the delivery sheath 3 to expand the stent 1 and cause both the duodenum 6 and the gallbladder 7 to retain the stent 1, and removing the needle 2.