24Hr pH Study

This test is performed in order to examine patients with asthma, chest pain, cough, heartburn, regurgitation, sore throat or changes in the voice. This is a test that monitors the acid reflux (acid rising from the stomach into the esophagus) by measuring the pH over a 24-Hr period. This allows your doctor to establish if there is any relationship between your symptoms and the occurrence of acid reflux.

This test involves the insertion of a small flexible plastic tube inserted through your nose and down into your esophagus and ending just above the valve separating your stomach from your esophagus. The tube is gently taped to the side of your nose to hold it in place and is also connected to a monitor that measures acid reflux. After the tube is inserted into your nose, you can go home and continue your daily activities including eating and drinking. An instruction sheet will be given to you that details the few restrictions there are to your day as well how to care for the tube and what symptoms are important to watch for over the 24-hour period of the test. The following day you will return to have the tube removed, which will take only a few minutes. There are no risks involved in this procedure, only risk of minor irritation to the skin around your nose and throat.

Before the test

  • Please DO NOT EAT OR DRINK ANYTHING (including water) after midnight the night before your
  • Please STOP taking stomach medications. If you are taking Nexium, Losec, Prevacid Pantaloc or Pariet you must stop this medication 1 week before the test. Zantac (Ranitidine), Tagamet (Cimetidine) and Axid should be stopped 48 hrs before the test. You CAN take liquid antacids, Gaviscon, Tums and Rolaids up until the time of the test


Here are the locations of some of the hospitals that we frequently use to book this test.