24 hour pH monitoring determines whether there may be an abnormal amount of acidic stomach contents coming back up into the esophagus. The test is performed by inserting a small pH tube into the nose and passing it into the esophagus and/or stomach.
This tube is connected to a small recording device, which records the pH or acid levels in the esophagus over a 24-hour period. After the probe is in place, the patient is free to leave the hospital. Since the unit worn on a strap, the patient is encouraged to resume their usual daily routine, which will allow the doctor to determine the cause of the problem amidst a normal days activities.
Following the 24-hour monitoring period, the pH probe will be removed and the data will then be transferred to a computer for analysis.