[Localization of the lower esophageal sphincter: a new formula]

The esophageal length in the study of patients with Gastroesophageal Reflux (G.E.R.) has the importance of assuring us of the correct position of the probe/sound of the esophageal ph-metering. We carried out a prospective study which correlated the size with the location of the Lower Esophageal Sphincter (L.E.S.), and we tried an approximation, greater than the one, obtained by other methods, in the measurement of the esophageal length, to obviate the manometric study, when our only aim was to insert correctly the probe/sound of the esophageal ph-metering.