Diabetes Care, Vol 17, Issue 8 901-903, Copyright © 1994 by American Diabetes Association

ARTICLES

Altered postprandial insulin requirement in IDDM patients with gastroparesis

M Ishii, T Nakamura, F Kasai, T Onuma, T Baba and K Takebe
Third Department of Internal Medicine, Hirosaki University School of Medicine, Japan.

OBJECTIVE--To evaluate the effect of gastric emptying on postprandial insulin requirement in insulin-dependent diabetes mellitus (IDDM) patients with and without gastroparesis. RESEARCH DESIGN AND METHODS--Postprandial insulin requirement and gastric emptying were simultaneously evaluated in five IDDM patients with gastroparesis and in six control IDDM patients without gastroparesis. Postprandial insulin requirement after test-meal intake was assessed by measuring the insulin infusion rate during a 4-h feedback control with an artificial endocrine pancreas device (Biostator, Life Science Instruments, Miles, Elkhart, IN). Gastric solid and liquid emptyings were evaluated during the Biostator study by measuring the disappearance rate of 99mTc in the stomach and in the time course of plasma acetaminophen concentration, respectively. RESULTS--Total insulin requirement during the first 120 min after the test-meal intake was significantly lower in the gastroparetic patients than in the control patients. The gastroparetic patients showed no apparent postprandial peak for insulin infusion rate during the 4-h study, although the peak rate was observed within 120 min after the test-meal intake in the control patients. The disappearance of 99mTc in the stomach was significantly slower, and plasma acetaminophen concentrations were significantly lower in the gastroparetic patients compared with those in the control patients, respectively. CONCLUSIONS--The results suggest that IDDM patients with gastroparesis, accompanied by impaired solid and liquid emptying, have an altered postprandial insulin requirement.
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