Esophageal pH and impedance studies

PH and impedance monitoring is an ambulatory 24-hour test that measures reflux of stomach contents into the esophagus.

This diagnostic test determines if you have gastroesophageal reflux disease (GERD). Although it is normal to have some reflux, excessive reflux may damage the lining of the esophagus and cause symptoms which include chest pain, heartburn, difficulty or painful swallowing, cough, hoarseness, and asthma.

A very small, flexible catheter (a tube about the size of spaghetti noodle) is inserted through your nostril and placed strategically in the esophagus. The catheter will be secured and attached to a recording device that measures reflux for 24 hours. The catheter will not interfere with eating, drinking or breathing.

An esophageal manometry study is performed prior to inserting the pH/impedance catheter to determine accurate placement of the pH/impedance sensors.