Sphincterotomy.
D014670:Ampulla of Vater / Q000033:anatomy & histology / Q000187:drug effects / Q000473:pathology / Q000502:physiology / Q000601:surgery*; D000818:Animals; D002769:Cholelithiasis / Q000601:surgery; D003135:Common Bile Duct / Q000033:anatomy & histology / Q000502:physiology; D004285:Dogs; D042882:Gallstones / Q000601:surgery; D006801:Humans; D006851:Hydrochloric Acid / Q000494:pharmacology; D008722:Methods; D009020:Morphine / Q000494:pharmacology; D010195:Pancreatitis / Q000601:surgery
D009020:Morphine; D006851:Hydrochloric Acid