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Updated: Oct 30, 2025
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Published on: June 11, 2012
The Accuracy of Continuous Glucose Monitoring in the Medical Intensive Care Unit
Wannita Tingsarat1,2, Patinut Buranasupkajorn2,3, Weerapan Khovidhunkit2,3
1Rayong Hospital, Tha Pradu, Rayong, Thailand.
Objective:
To assess the accuracy of continuous glucose monitoring (CGM) in medical intensive care unit (MICU) patients.
Methods:
A Medtronic Enlite® sensor accuracy was assessed versus capillary blood glucose (CBG) and plasma glucose (PG) using the mean absolute relative difference (MARD), surveillance error grid (SEG) analysis and modified Bland-Altman plots.
Results:
Using CBG as a reference, MARD was 6.6%. Overall, 99.7% of the CGM readings were within the "no risk" zone. No significant differences in accuracy were seen within vasopressor subgroups. Using PG as the reference, MARD was 8.8%. The surveillance error grid analysis showed 95.2% of glucose readings were within the "no risk" zone. There were no device-related adverse events.
Conclusion:
The CGM sensor showed acceptable accuracy in MICU patients, regardless of vasopressor use.
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