A technician places a catheter into the nose and
guides it into the stomach. Once placed, the catheter is
slowly withdrawn, allowing it to detect pressure changes
and to record information for later review. The patient
will be asked at various times to take a deep breath or
to take some swallows of water. The degree of discomfort
varies among patients. Patients are not sedated because
sedatives would alter the functioning of the esophageal
muscles. Overall the procedure takes about 45 minutes.
After the procedure is complete, patients can usually
resume their normal daily activities.