title: A new concept for active occlusion during percutaneous nephrolithotripsy: the 'counter-flow' principle.
authors.forename: Nagesh
authors.initials: N
authors.lastname: Kamat
mesh_terms: D003250:Constriction; D006801:Humans; D007669:Kidney Calculi / Q000628:therapy*; D008096:Lithotripsy / Q000379:methods*; D014546:Urinary Catheterization / Q000379:methods