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 one 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 inch in diameter) is gently placed into one nostril and guided into the esophagus
- The end of the tube is positioned precisely 2 inches 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” type recorder, which is provided