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This test is indicated for patients who have gastroesophageal reflux disease (GERD) with poor response to acid suppressive therapy, pre-operative assessment of anti-reflux surgery, non-cardiac chest pain, liquid (acidic or non-acidic) regurgitation, repeated belching.

Local anesthetic will be given to patient and then a catheter of 1mm diameter will be intubated through the patient’s nostril into the esophagus. The patient will carry a portable recorder to which the catheter is connected. The patient can leave the hospital and resume normal activity during test, while recording the exact time of symptom onset, sleeping and diet on a given diary. The patient will come back to the hospital after 24 hours to have the catheter removed and to return the recorder and diary.