Esophageal pH Assessment - 24 Hour Study
If you have symptoms of heartburn or acid reflux, your physician may want to determine the amount of acid (the pH) that is getting into your esophagus from your stomach. These tests are called ambulatory monitoring because you go home and go about your usual daily routine while you’re being monitored.
A small (2 millimeter) catheter is inserted through your nose, down the back of your throat and into your esophagus. The tube is taped in place on your nose and has a long cord that is attached to a portable data recorder. You wear the recorder in a pouch that has a strap that goes around your waist or neck.
Unless instructed otherwise by your physician: