Simultaneous intraesophageal impedance and pH measurement of acid and nonacid gastroesophageal reflux: effect of omeprazole. Academic Article uri icon

Overview

abstract

  • BACKGROUND & AIMS: Nonacid reflux may explain symptoms in acid-suppressed patients. Simultaneous intraesophageal impedance and pH measurement was used to evaluate the frequencies of postprandial acid and nonacid reflux before and after omeprazole administration. METHODS: Twelve heartburn patients underwent two 2-hour studies of intraesophageal impedance and pH in the right lateral decubitus position after a refluxogenic meal; session 1 without medication, session 2 after 7 days of omeprazole twice daily. Acid and nonacid reflux were quantified. RESULTS: Two hundred seventeen reflux episodes were detected before and 261 after omeprazole treatment (P > 0.05). Percentage of acid reflux decreased (from 45% to 3%, P = 0.02) and nonacid reflux increased (from 55% to 97%, P = 0.03) after omeprazole. Heartburn and acid taste were more commonly linked to acid reflux but were also produced by nonacid reflux. Regurgitation was reported equally in acid and nonacid reflux. Delta(pH) > 1 did not help predict the presence of symptoms during nonacid reflux. CONCLUSIONS: During treatment with omeprazole, postprandial reflux becomes predominantly nonacid. Symptoms are more common with acid reflux but are also produced by nonacid reflux. Simultaneous intraesophageal impedance and pH may be useful in evaluating the role of nonacid reflux in symptoms that persist despite adequate acid suppression.

publication date

  • June 1, 2001

Research

keywords

  • Anti-Ulcer Agents
  • Enzyme Inhibitors
  • Gastric Acid
  • Gastric Acidity Determination
  • Gastroesophageal Reflux
  • Omeprazole

Identity

Scopus Document Identifier

  • 0034995918

Digital Object Identifier (DOI)

  • 10.1053/gast.2001.24840

PubMed ID

  • 11375942

Additional Document Info

volume

  • 120

issue

  • 7