Rethinking Glycemic Control: The Intensive Care Unit Pro-con Debate on Continuous versus Conventional Glucose Monitoring

Pro-ConContinuous glucose monitoring sensors can be of two broad types: subcutaneous glucose monitoring devices and intravascular glucose monitoring devices.Subcutaneous devices that measure the glucose concentration in the interstitial fluid are commonly used and are usually factory-calibrated.Intravascular glucose monitoring devices, which measure the glucose concentration in the blood, are not commonly used because of the risk of thrombosis, bleeding, and the invasiveness of the device. 7y offering almost real-time glucose trends, alarms for impending hyperglycemia/hypoglycemia, and the potential to reduce nursing workload, CGM technology has gained significant attention as a tool that might transform glycemic management in the ICU.At the same time, concerns persist regarding the device accuracy in critically ill patients, sensor performance during hemodynamic instability, integration challenges with existing nursing workflows, and the clinical relevance of detecting every minute fluctuation of glucose levels. 8Around 4-15% of hypoglycemic events are undetected in critically ill patients, and this percentage increases with decreased frequency of checking glucose levels.