[Pancreatic elastase-1 in the stool for the determination of exocrine pancreas function of postoperative patients with early enteral nutrition -- a pilot study]

Abstract

Background and objective: There are only incomplete data about exocrine pancreatic function after major gastrointestinal surgery. Early enteral nutrition with high-molecular diets is increasingly administered to these patients. A knowledge of exocrine secretion of the pancreas is crucial, because pancreatic enzymes are needed for the adsorption of the high-molecular diets. To determine the exocrine pancreatic secretion the fecal elastase-1 is a sensitive method for measuring exocrine pancreatic secretion.

Patients and methods: In a prospective study fecal elastase-1 was measured in patients on enteral nutrition (n=12) early after major gastrointestinal operations. They were given a high molecular diet via an intraoperatively placed small-needle catheter jejunostomy, starting 12 hours after operation with a continuous infusion of 20 ml/h (1 kcal/ml),increased to 80 ml/h during the next few days. Samples from the first and second stools after beginning the enteral nutrition were taken for measuring the fecal elastase-1.

Results: All patients fed enterally had no relevant feeding-associated complications and no diarrhea. The elastase-1 concentrations were normal in both the first and the second stool samples in all patients (normal stool elastase is > 200 g/g). The average elastase concentration in the first stool sample was 361,4 mg/g (median: 317 mg/g) and 454 mg/g in the second (median: 466,6 mg/g). Thus no exocrine pancreatic insufficiency was detected in any of the patients.

Conclusion: The results of elastase-1 in stool demonstrate that severe exocrine pancreas dysfunction is not generally present in patients on early enteral nutrition after major gastrointestinal surgery.