Lower esophageal sphincter pressure measurement under standardized inspiratory maneuveurs.

Background: Through rhythmic variations, the diaphragm influence lower esophageal sphincter (LES) pressure acting as an external sphincter. LES pressure recording is characterized by increased pressure in inspiration due to contraction of the diaphragmatic crura that involves the sphincter.

Aim: To describe a method of measuring LES pressure during standardized inspiratory maneuvers with increasing loads.