Accuracy of Glucose Trends by Subcutaneous Continuous Monitoring vs Intermittent Arterial Measurements in Critically Ill Patients
Authors' conclusion
In critically ill patients receiving insulin, CGM demonstrated high overall trend accuracy relative to ABG. Trend accuracy was reduced at lower glucose ranges and during the initial 24 hours of CGM use.
Study context
- Population
- Adult intensive care unit (ICU) patients receiving insulin and organ-supportive therapies2,701 paired trends
- Participants
- 40 patients
- Comparison
- Subcutaneous continuous glucose monitoring (CGM) vs intermittent arterial blood gas measurements
- Outcome
- Trend accuracy by Rate Error Grid Analysis (R-EGA) and DTS Trend Accuracy Matrix (DTS-TAM)
Performance
As reported in the abstract
Trend accuracy of CGM vs ABG
Trends in Rate Error Grid Analysis (R-EGA) Zone A
99.7%
Trends in R-EGA Zone B
0.3%
Trends in Diabetes Technology Society Trend Accuracy Matrix (DTS-TAM) No Risk category
98.6%
Trends in adjacent Mild-to-Moderate Risk categories
1.7%
Further findings
Mild-to-Moderate Risk trends by arterial blood gas (ABG) level
- ABG <100 mg/dL (5.56 mmol/L)
- 3.6%
- ABG 100 to 180 mg/dL (5.56 to 10 mmol/L)
- 1.3%
- ABG >180 mg/dL (10 mmol/L)
- 1.6%
Mild-to-Moderate Risk trends over time from CGM initiation
- First 24 hours of CGM use
- 2.9%
- Beyond 24 hours
- 0.9%
Original publication
Accuracy of Glucose Trends by Subcutaneous Continuous Monitoring vs Intermittent Arterial Measurements in Critically Ill Patients. J Diabetes Sci Technol. Published 24 July 2025. doi:10.
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