The esophageal pH test measures acid exposure to the end portion of the esophagus over 24 hours. During the measurement period the patient is asked to record symptoms, such as coughing, heartburn, and chest pain. This test is a very accurate way to diagnose gastroesphogeal reflux disease  (GERD) and correlate reflux episodes with symptoms.
In addition to measuring pH, our system allows measurement of impedance. Impedance measures fluid movements in the esophagus. Combining pH and impedance data we can detect non-acid or weak acid reflux that may be causing symptoms that would not be detected by pH testing alone.
The pH and impedance information is transmitted to a recording box that the patient wears externally.
This test may be used for difficult to diagnose and treat typical reflux with negative endoscopic findings but also for atypical reflux symptoms, such as hoarseness, cough, non-cardiac chest pain, reflux-induced asthma, and various ENT conditions (recurrent sinusitis).