Infusing 6 mg of somatostatin continuously for 24 hours will lead to a reduction of pancreatic secretion and perfusion of the splanchnic area. Due to this mechanism, secretion is significantly reduced in case of pancreatic or small intestine fistulae. Somatostatin was applied continuously in 39 patients for a period of 7 days. This led to a healing of pancreatic fistulae in 85.7% and small intestine fistulae in 63.6% of cases.