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Transition From Intravenous to Subcutaneous Insulin

F. Avanzini,G. Marelli,W. Donzelli,Giovanna Busi,S. Carbone,Laura Bellato,E. L. Colombo,R. Foschi,E. Riva,M. Roncaglioni,M. De Martini

Published 2011 in Diabetes Care

ABSTRACT

OBJECTIVE The study objectives were 1) to assess the effectiveness and safety of a standardized protocol for the transition to subcutaneous insulin and oral feeding in diabetic or hyperglycemic patients with acute coronary syndrome (ACS) who were receiving intravenous insulin and glucose at the time of the transfer from the intensive cardiac care unit to a general ward and 2) to identify predictors of transition outcome. RESEARCH DESIGN AND METHODS This was a prospective observational study. The protocol specifies that patients receive a 100% of their daily subcutaneous insulin requirement from the first day of oral feeding, calculated from the intravenous insulin rate during the final 12 h divided into two: 50% basal and 50% prandial. RESULTS In 142 patients (93 male, 49 female, age range 47–88 years, 135 with known diabetes) the first day after transition, 44.8% of blood glucose (BG) measurements were within the strict range of 100–140 mg/dL before meals and 100–180 mg/dL after meals, and 70.8% were within the broader ranges of 80–160 mg/dL and 80–200 mg/dL, respectively. Pre- or postprandial hypoglycemia (BG <70 mg/dL) occurred in 11 patients (7.7%) on the first day and in 38 patients (26.8%) on the first 3 days after transition. Old age, high doses of intravenous insulin, and wide BG variations in the 24 h before insulin infusion was stopped were predictive of poor BG control after transition. CONCLUSIONS This study shows the effectiveness and safety of a standardized protocol for the transition from intravenous to subcutaneous insulin in patients with ACS when regular oral feeding was resumed.

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