Esophageal pH Monitoring is a test to diagnose the abnormal reflux of acidic stomach contents back up into the esophagus. This condition, known as GERD, is a common cause of heartburn, indigestion, and sometimes unusual symptoms such as chest pain, cough, sore throat, or laryngitis.
During this procedure, the acid level (pH) in the esophagus is measured over 24 to 48 hours by either a probe attached to the lining of the esophagus during an upper endoscopy procedure (Bravo pH capsule), or a long, thin tube inserted through the nose.
The information is transmitted to a recording device worn by the patient during the procedure. The patient is also asked to record symptoms during the test. The physician analyzing the data can then determine if the patient’s symptoms are related to GERD.