CGM Utilization With IV Insulin EndoTool and Subcutaneous Insulin in the Neuro ICU

The study is comparing current standard of care blood glucose fingersticks or serum blood glucose collection to CGM data utilizing the Freestyle Libre 2.0 CGM. A recently conducted study of 8 critically ill patients with diabetes that wore Freestyle Libre 2.0 CGM's during their ICU stay demonstrated high test-retest reliability and acceptable accuracy when compared with arterial blood glucose measurements. The study aims to evaluate utilization of CGM technology and EndoTool in the critical care setting by recruiting a cohort of 10 participants with hyperglycemia and/or diabetes mellitus who are anticipated to require blood glucose monitoring and IV insulin to achieve adequate glycemic control while in the Neuro ICU. The study also aims to evaluate utilization of CGM technology and subcutaneous insulin by recruiting a cohort of 10 patients with a history of diabetes mellitus on high dose steroids who are anticipated to require blood glucose monitoring and treatment with basal bolus insulin. Participants will be enrolled on admission to the Neuro ICU and have the CGM device placed. The study aims to evaluate CGM technology by comparison of glucose values obtained from the CGM to the serum or fingerstick blood glucose levels while the patient is either receiving IV insulin via EndoTool or subcutaneous insulin while on high dose glucocorticoids. Current standard of care with monitoring glycemic data utilizing point of care blood glucose fingersticks and serum glucose will be utilized for comparison.