The ideal glycemic control in ICUs whether medical, surgical, or cardiac is controversial. Early 2001, Van den Berghe et al: An intensive glycemic control is important to reduce the mortality and morbidity both in medical and surgical ICU 2009, NICE-SUGAR study: A very tight control might be detrimental to the outcome of patients in the medical ICU. 2008, ACCORD study: Very tight blood glucose may not be beneficial in the outcome of cardiac patients. The reason may include drug interactions, weight gain, or hypoglycemia.
Source : Dharmalingam, M. (2016). Glycemic control in Intensive Care Unit. Indian journal of endocrinology and metabolism, 20(4), 415.