You are watched closely for any disturbances in your normal heart-rhythm patterns. Do not drink any alcohol for 24 hours before test. You may be asked not to take this medication before the test. You may gag or cough. Lubricant on the catheter may have a bad taste.
Discomfort disappears when the test is finished.
Equipment used Clamp. Description of test You or a close relative will be required to sign a consent form after the procedure has been explained to you. Swallow the tube with a pH electrode attached as soon as it is passed through your nose into the back of your throat. If pH remains normal, tube is advanced into the stomach. A small amount of hydrochloric acid is injected into the stomach.