The recording of pressures from the esophagus and its lower sphincter, at one time purely of physiological interest, has proved to be a valuable technique for the study of a number of disorders encountered in clinical medicine. Intraluminal manometry is being effectively utilized at several medical centers as an important supplement to roentgenographic and endoscopic examinations in the evaluation of esophageal motor dysfunction particularly in selected patients with difficult-to-diagnose, upper gastrointestinal symptoms. The basic components of the pressure-recording assemblies used in these tests are three or four small-caliber, open-tipped or balloon-covered, water-catheters separated by several centimeters and connected to extracorporeal transducers so that pressures can be registered from several points simultaneously.1 These small, flexible tubes are easily swallowed and passed into the stomach. With the subject supine and refraining from swallowing, they are withdrawn at 0.5-cm stepwise intervals from stomach to esophagus thus tracing the pressure profile of the
Kelley ML. Intraluminal Esophageal Manometry. JAMA. 1967;202(6):537. doi:10.1001/jama.1967.03130190143023
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