[Significance and problems of determination of the pressure within the digestive tract].
D001003:Anal Canal / Q000503:physiopathology; D004931:Esophageal Achalasia / Q000503:physiopathology*; D004947:Esophagus / Q000503:physiopathology; D006801:Humans; D008365:Manometry / Q000379:methods; D008531:Megacolon / Q000503:physiopathology*; D011312:Pressure