A thin tube is passed through your mouth or nose and into your stomach, then the tube is pulled slowly back into the esophagus.
Pressure measurements may be taken at intervals along the tube. The outer end of the tube is attached to an instrument called a transducer that will record the pressure.
The transducer records the high pressure zone of the lower esophageal sphincter (LES), the sphincter muscle that acts as a valve to prevent reflux of gastric acid into the esophagus.
When the tube is in the esophagus, you will be asked to swallow. The swallowing wave will be recorded.
While the tube is in place, other studies of your esophagus may be done. The tube is removed after the tests are completed.
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