Esophageal pH monitoring

Table of Contents

Alternative Names

pH monitoring - esophageal; Esophageal acidity test


Normal Values

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.


What abnormal results mean

Increased acid in the esophagus may be a sign of, or occur with:

  • Barrett's esophagus
  • Difficulty swallowing (dysphagia)
  • Esophageal scarring
  • Gastroesophageal reflux disease (GERD)
  • Heartburn
  • Reflux esophagitis

If you are suspected to have esophagitis, you may need these additional tests:

  • Barium swallow
  • Esophagogastroduodenoscopy (also called upper GI endoscopy)


Review Date: 11/11/2010
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and George F. Longstreth, MD, Department of Gastroenterology, Kaiser Permanente Medical Care Program, San Diego, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)