Gastric and intestinal mucosal morphology before and after interposition of a reflux-preventing valve between the gastric remnant and the duodenum. An experimental study in dogs.

A gastric mucosal reaction characterized by inflammatory cells and oedema in the lamina propria and proliferation of surface epithelium was found in 5 out of 12 dogs subjected to partial gastrectomy and examined 1-6 months after the operation. A normal gastric mucosa was found in 14 dogs 1-12 months after interposition of a reflux-preventing valve between the gastric remnant and the duodenum. In 4 dogs with histologically verified gastritis after partial gastrectomy, transposition of a jejunal segment provided with an intussusception valve resulted in normalization of the gastric mucosal morphology.