Liberal Glycemic Control in Critically Ill Patients With Type 2 Diabetes: An Exploratory Study.

Objectives: The optimal blood glucose target in critically ill patients with preexisting diabetes and chronic hyperglycemia is unknown. In such patients, we aimed to determine whether a "liberal" approach to glycemic control would reduce hypoglycemia and glycemic variability and appear safe. Design: Prospective, open-label, sequential-period exploratory study. Setting: Medical-surgical ICU. Patients: During sequential 6-month periods, we studied 83 patients with preexisting type 2 diabetes and chronic hyperglycemia (glycated hemoglobin, >= 7.0% at ICU admission). Intervention: During the "standard care" period, 52 patients received insulin to treat blood glucose concentrations greater than 10 mmol/L whereas during the "liberal" period, 31 patients received insulin to treat blood glucose concentrations greater than 14 mmol/L. Measurements and Main Results: Time-weighted mean glucose concentrations and the number and duration of moderate (

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