title: Tricks, tactics and techniques for the removal of impacted gallstones from the common bile duct.
mesh_terms: D014670:Ampulla of Vater / Q000601:surgery; D003135:Common Bile Duct / Q000601:surgery; D003137:Common Bile Duct Diseases / Q000175:diagnosis; D004386:Duodenum / Q000601:surgery; D042882:Gallstones / Q000601:surgery*; D006801:Humans; D008751:Methylene Blue; D013525:Surgical Instruments / Q000592:standards*
chemical_list: D008751:Methylene Blue