title: Simplified method of introducing double-J stent catheters using a coaxial sheath system.
mesh_terms: D006801:Humans; D009403:Nephrostomy, Percutaneous / Q000295:instrumentation; D014517:Ureteral Obstruction / Q000628:therapy*; D014546:Urinary Catheterization / Q000295:instrumentation / Q000379:methods*