Changes in glucose tolerance and serum insulin following partial gastrectomy and intestinal resection.

Partial gastrectomy and intestinal resection significantly impaired glucose tolerance (p < 0.05) and significantly decreased the release of insulin by intravenous glucose (p < 0.05) or a meal of minced beef (p < 0.01). There was a significantly greater release of insulin one hour after oral glucose in the gastrectomy patients (p < 0.05).