Jefferson University Hospitals

24-Hour Ambulatory pH Monitoring

Twenty-four-hour ambulatory pH monitoring is considered the "gold standard" for diagnosing gastroesophageal reflux disease (GERD). The highly skilled physicians and clinicians of Jefferson's Gastrointestinal Motility Program use a state-of-the-art system that allows for the simultaneous assessment of proximal esophageal, distal esophageal and gastric pH to accurately measure the degree of acid reflux.

The procedure involves placing a small probe into your esophagus. The probe is connected to a small recording device that you will carry for 24 hours. After the probe is in place, you will be free to leave the hospital and are encouraged to go about your normal daily routine. This is important so that your physician can get a realistic picture of what is taking place in the esophagus.

You will be asked to return in approximately 24 hours, at which time the pH probe will be removed and the data will be transferred to a computer for analysis.