Continuous Glucose Monitoring Using the Dexcom G6 in Cardiac Surgery During the Postoperative Period
Authors' conclusion
Almost 100% of Dexcom G6Pro CGM and clinical data matching points fell within areas considered as giving clinically correct decisions (zone A) and clinically uncritical decisions (zone B). However, the relatively high mean absolute relative difference precludes its use for both monitoring and treatment in the clinical context. As technology evolves, interstitial glucose monitoring may become an important tool to limit iatrogenic anemia and mitigate glycemic fluctuations.
Study context
- Population
- Patients in the postoperative cardiac surgery period after intensive care unit (ICU) admission; 71% male, 14% with known diabetes, 66% required IV insulin infusion1,428 clinical readings
- Participants
- 29 patients
- Comparison
- Dexcom G6Pro CGM vs clinical glucose measurements
- Outcome
- Accuracy of Dexcom G6Pro CGM vs clinical glucose, all measures post-ICU admission
Methodological detailspilot study, CGM worn until discharge or 10 days postoperatively
- Pilot study
- CGM worn until discharge or 10 days postoperatively
Performance
As reported in the abstract
Clarke error grid zone A
53.5%
Clarke error grid zone B
45.9%
Clarke error grid zones D or E
0.6%
n = 5
Mean absolute relative difference
20.6%
Further findings
Accuracy excluding first 24 hours post-ICU admission
- Clarke error grid zone A
- 55.9%
- Clarke error grid zone B
- 43.9%
- Clarke error grid zone D
- 0.2%
- Mean absolute relative difference
- 21.6%
Consensus error grid, subanalysis of 12 patients without >5-minute tap in operating room, post-ICU admission
- Zone A
- 53.9%
- Zone B
- 45.4%
- Zone C
- 0.7%
- Similar percentages removing first 24 hours post-ICU admission
Consensus error grid post-ICU admission
- Zone A
- 54%
- Zone B
- 45%
- Zone C
- 0.9%
Consensus error grid excluding first 24 hours
- Zone A
- 56%
- Zone B
- 44%
- Zone C
- 0.4%
Safety
- No adverse events were reported
Original publication
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