title: Mechanisms of gastroesophageal reflux in children.
abstract: We studied the lower esophageal sphincter in 29 children with known or suspected gastroesophageal reflux using a sleeve sensor and micro pH electrode. Mean lower esophageal sphincter pressure for a ten-minute monitoring period was 19 +/- 13 mm Hg; however, considerable temporal variation occurred in each child. Gastroesophageal reflex was infrequently associated with a low basal sphincter pressure (< 5 mm Hg) but usually associated with an increase in intra-abdominal pressure or with transient inappropriate relaxation of the lower esophageal sphincter.
mesh_terms: D002675:Child, Preschool; D004947:Esophagus / Q000503:physiopathology*; D005764:Gastroesophageal Reflux / Q000503:physiopathology*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009126:Muscle Relaxation; D011312:Pressure