Esophageal manometry

Esophageal manometry, also referred to as esophageal motility studies, involves the placement of a pressure-sensitive catheter into the esophagus. The test permits evaluation of the strength and coordination of muscle contractions, as well as the strength and relaxation function of the lower esophageal sphincter. Although low LES pressure is suggestive of GERD, the condition may also occur in patients with normal LES pressure. Therefore, the results of esophageal manometry are not reliable for the diagnosis of GERD.

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Manometry is usually used prior to esophageal pH monitoring (see below) to determine the level of the esophagus at which the pH probe should be placed. Many authorities consider manometry an essential part of assessment in patients being considered for antireflux surgery, helping to determine whether surgery is appropriate and what specific surgical procedure should be performed.