Antegrade assistance for retrograde sphincterotomy using a new sphincterotome.
D000368:Aged; D014670:Ampulla of Vater / Q000601:surgery*; D020698:Duodenoscopes; D004384:Duodenoscopy / Q000379:methods*; D042882:Gallstones / Q000601:surgery*; D006801:Humans; D008297:Male; D009803:Sphincter of Oddi / Q000601:surgery*; D013525:Surgical Instruments