title: A dilating introducer-sheath for the antegrade insertion of ureteral stents.
mesh_terms: D004106:Dilatation / Q000295:instrumentation; D006801:Humans; D011138:Polytetrafluoroethylene; D014517:Ureteral Obstruction / Q000628:therapy*; D014546:Urinary Catheterization / Q000295:instrumentation* / Q000379:methods
chemical_list: D011138:Polytetrafluoroethylene