[Upper esophageal sphincter: pressure studies after acidification of the distal esophagus].
D000328:Adult; D004935:Esophageal Diseases / Q000503:physiopathology*; D004943:Esophagogastric Junction / Q000503:physiopathology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008365:Manometry; D011312:Pressure
Sfintere esofageo superiore: rilievi pressori dopa acidificazione dell'esofago distale