title: Continuous 48-Hour Wireless Esophageal pH Monitoring in Children: Comparison Between Days 1 and 2.
abstract: OBJECTIVE
  Comparison of days 1 and 2 to each other and to the total recording of 48 hours in continuous 48-hour wireless esophageal pH monitoring in children.
  
  
  METHODS
  A retrospective study of 105 patients who underwent 48-hour pH monitoring (Bravo) studies between January 1992 and June 2010 was performed. Reflux variables were compared between days 1 and 2.
  
  
  RESULTS
  A total of 58 (55.2%) patients were men. The number of reflux episodes, number of long reflux >5 minutes, duration of the longest reflux (minutes), time pH <4 (minutes), fraction time pH <4 supine (%), fraction time pH <4 upright (%), reflux index, and DeMeester score did not differ between days 1 and 2.
  
  
  CONCLUSIONS
  No effect of anesthesia was observed on the gastroesophageal reflux parameters on children.
authors.affiliation: *Mayo Clinic, Rochester, MN †Loyola University Medical Center, Maywood, IL.
authors.forename: Anupama
authors.initials: A
authors.lastname: Ravi
authors.forename: Thirumazhisai
authors.initials: T
authors.lastname: Gunasekaran
authors.forename: James
authors.initials: J
authors.lastname: Berman
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D016292:Procedural Sedation / Q000009:adverse effects*; D050782:Esophageal pH Monitoring / Q000295:instrumentation / Q000706:statistics & numerical data*; D004947:Esophagus / Q000502:physiology; D005260:Female; D005764:Gastroesophageal Reflux / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D012189:Retrospective Studies; D013997:Time Factors