The High Glucose Alert - Dexcom G4 User Manual

The High Glucose Alert

Estimates of how well the adjustable High Glucose Alert performs are presented in Table 6.
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 and your alarm sounds, how often can you
expect your blood sugar to actually be high? Based on the Original Study, if your alarm sounds, you can
expect your blood sugar to be at or above 200 mg/dL approximately 92% of the time and not be above 200
mg/dL approximately 8% of the time within the 15 minute period before or after your alarm sounds. Based
on the Study, if your alarm sounds, you can expect your blood sugar to be at or above 200
Software 505
mg/dL approximately 96% of the time and not be above 200 mg/dL approximately 4% of the time within the
15 minute period before or after your alarm sounds.
Hyperglycemia Detection Rate
The Detection Rate shows how often the device recognizes and alerts you to an episode of hyperglycemia
or how often it misses such an event. The Hyperglycemia Detection Rate is the % of time the blood glucose
level was at or above the alert setting and the device alarmed within 15 minutes before or after the blood
glucose was at or above the alert settings. The Hyperglycemia Missed Detection Rate is the % of time the
blood glucose was at or above the alert setting, but the device did not alarm within 15 minutes before or
after the blood glucose was at or above the alert setting.
For example, if you set your High Glucose alert to 200 mg/dL, how often will your alarm alert you if your blood
glucose goes at or above 200 mg/dL? Based on the Original Study, if your blood sugar goes above 200
mg/dL, you can expect your alarm to sound 97% of the time and not to sound approximately 3% of time
within the 15 minute period before or after your blood sugar goes above 200 mg/dL. Based on the Software 505
Study, if your blood sugar goes above 200 mg/dL, you can expect your alarm to sound 98% of the time and
not to sound approximately 2% of time within the 15 minute period before or after your blood sugar goes above
200 mg/dL.