Esophageal pH monitoring is a test that measures how often
stomach acid enters the tube that leads from the mouth to the
stomach (called the esophagus). The test also measures how long
the acid stays there. pH monitoring - esophageal; Esophageal
acidity test How the test is performed A thin tube is passed
through your nose or mouth to your stomach. The tube is then is
pulled back into your esophagus. A monitor attached to the tube
measures the acid level in your esophagus. You will wear the
monitor on a strap and record your symptoms and activity over
the next 24 hours. You will return to the hospital the next day
and the tube will be removed. The information from the monitor
will be compared with your diary notes. Infants and children may
need to stay in the hospital for the esophageal pH monitoring.
How to prepare for the test Your health care provider will ask
you to not eat or drink after midnight before the test. You
should also avoid smoking. Some medicines may change the test
results. Your health care