title: Combined manometric-pH recording catheter for esophageal function tests.
mesh_terms: D002404:Catheterization / Q000295:instrumentation*; D004943:Esophagogastric Junction / Q000502:physiology*; D004947:Esophagus / Q000502:physiology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008365:Manometry / Q000295:instrumentation*; D011145:Polyvinyls
chemical_list: D011145:Polyvinyls