[Dynamics of emptying of the antral portion of the stomach]

In 3 dogs with antral and duodenal fistulas, the time of remaining of a portion of chyme in the antrum was constant and did not depend on the rate of gastric emptying. No retropulsion of antral contents into the fundus was observed. The data suggest that: 1) the antrum is only involved in discharge of chyme from the stomach into the duodenum during the period which depends but a little on the amount of food evacuated; 2) the rate of gastric emptying is determined by fundus and corpus of the stomach.