title: A general ureteral dilator-sheathing system.
mesh_terms: D004106:Dilatation / Q000295:instrumentation; D006801:Humans; D011138:Polytetrafluoroethylene; D014513:Ureter; D014546:Urinary Catheterization / Q000295:instrumentation*
chemical_list: D011138:Polytetrafluoroethylene