Effect of Increased Intra-abdominal Pressure on the Esophagogastric Junction
Stefano Siboni, Luigi Bonavina, Benjamin D. Rogers, Ciara Egan, Edoardo Savarino, C. Prakash Gyawali, Tom R. DeMeester
Abstract
With the advent of high-resolution esophageal manometry, it is recognized that the antireflux barrier receives a contribution from both the lower esophageal sphincter (intrinsic sphincter) and the muscle of the crural diaphragm (extrinsic sphincter). Further, an increased intra-abdominal pressure is a major force responsible for an adaptive response of a competent sphincter or the disruption of the esophagogastric junction resulting in gastroesophageal reflux, especially in the presence of a hiatal hernia. This review describes how the pressure dynamics in the lower esophageal sphincter were discovered and measured over time and how this has influenced the development of antireflux surgery.