Abstract 1. 1. In a dog, it is possible to perform gastric antrectomy in such a manner as to completely excise the antral mucosa yet preserve the pyloric sphincter. 2. 2. The gastric emptying of hypertonic solutions following such a sphincter preserving antrectomy is more normal than that which follows the conventional (sphincter destroying) antrectomy. 3. 3. Such a sphincter preserving antrectomy would seem feasible in certain clinical situations.