Effect of Thoracic Displacement and Vagotomy on the Canine Gastroesophageal Junctional Zone

摘要: This study was undertaken to delineate the functional importance of paraesophageal structures and vagal innervation in maintaining gastroesophageal competence. Intraluminal pressures were recorded from canine stomach, esophagus, junctional zone, before after surgical displacement zone into thorax; vagotomy at level junction; replacement within abdomen. The results suggest that anatomical position and, therefore, structures, do not contribute high pressure are important Division vagus nerves junction resulted a decrease resting sphincteric response abdominal compression, allowing free reflux occur. Afferent impulses arising below diaphragm exert controlling influence on integrity sphincter. Vagotomy creates model incompetence proposed for experimental esophagitis.