title: A general ureteral dilator-sheathing system.
mesh_terms: D002404:Catheterization / Q000295:instrumentation*; D003558:Cystoscopy; D004106:Dilatation / Q000295:instrumentation; D006801:Humans; D011138:Polytetrafluoroethylene; D014513:Ureter; D014514:Ureteral Calculi / Q000628:therapy; D014517:Ureteral Obstruction / Q000628:therapy
chemical_list: D011138:Polytetrafluoroethylene