24-Hour Esophageal pH Study

A 24-hour esophageal pH study is used to measure the number of acid reflux episodes a patient experiences during a 24-hour period. The study also measures the amount of time (in minutes) that stomach acid is present in the esophagus and allows for evaluation of your symptoms with activity, at home or work, and especially during sleep.

The 24-hour esophageal pH study takes place in an examination room. You will not be asked to remove any clothing, and sedation is not usually given. Your appointment will last about an hour, including outpatient admission, instruction and placement of the pH catheter.

• The nurse will spray the inside of your throat with a topical anesthetic and will use an anesthetic lubricant on the small, flexible pH tube.
• The tube (1/8? in diameter) is gently placed into one nostril and guided into the esophagus. The end of the tube is positioned precisely 2? above the diaphragm, where acid sensing occurs.
• After the pH catheter is placed, it is secured to the end of your nose and side of your face with small pieces of silk tape.
• The catheter is attached to a "Walkman" style recorder, which is provided.