User`s guide

Dexcom G4 PLATINUM User’s Guide | 155
16
The High Glucose Alert
Estimates of how well the adjustable High Glucose Alert performs are
presented in Table 6.
Table 6. Hyperglycemic Alert Evaluation
Hyperglycemic
Alert Level mg/dL
(mmol/L)
True
Alert
Rate
False
Alert
Rate
Hyperglycemia
Detection Rate
Hyperglycemia
Missed Detection
Rate
120 (6.7) 95% 5% 98% 2%
140 (7.8) 94% 6% 97% 3%
180 (10.0) 92% 8% 97% 3%
20 0 (11.1) 92% 8% 97% 3%
220 (12.2) 91% 9% 95% 5%
240 (13.3) 91% 9% 94% 6%
300 (16.7) 82% 18% 86% 14%
Hyperglycemia Alert Rate
The Alert Rate shows how often the alert is right or wrong. The True
AlertRateisthe%oftimethedevicealarmedwhenthebloodglucose
level was at or above the alert setting within 15 minutes before or after
thedevicealarmed.TheFalseAlertRateisthe%oftimethedevice
alarmed when the blood glucose level was below the alert setting within
15 minutes before or after the device alarmed.
For example, if you set the High Glucose alert to 200 mg/dL (11.1 mmol/L)
and your alarm sounds, how often can you expect your blood sugar to
actually be high? If your alarm sounds, you can expect your blood sugar
tobeatorabove200mg/dL(11.1mmol/L)approximately92%ofthe
timeandnotbeabove200mg/dL(11.1mmol/L)approximately8%of
the time within the 15 minute period before or after your alarm sounds.