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194 | Dexcom G4 PLATINUM Professional Continuous Glucose Monitoring System
14
Hypoglycemia 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 below 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 above the alert setting within
15 minutes before or after the device alarmed.
For example, if you set the Low Glucose Alert to 70 mg/dL (3.9 mmol/L)
and your alarm sounds, how often can you expect your blood sugar to
actually be low? If your alarm sounds, you can expect your blood sugar
to be below 70 mg/dL (3.9 mmol/L) approximately 79% of the time and
not be below 70 mg/dL (3.9 mmol/L) approximately 21% of the time
within the 15 minute period before or after your alarm sounds.
Hypoglycemia Detection Rate
The Detection Rate shows how often the device recognizes and alerts
you to an episode of hypoglycemia or how often it misses such an event.
The Hypoglycemia Detection Rate is the % of time the blood glucose
level was at or below the alert setting and device alarmed within 15
minutes before or after the blood glucose was at or below the alert
settings. The Hypoglycemia Missed Detection Rate is the % of time
the blood glucose was at or below the alert setting, but the device did
not alarm within 15 minutes before or after the blood glucose was at or
below the alert setting.
For example, if you set the Low Glucose alert to 70 mg/dL (3.9 mmol/L),
how often will your alarm alert you if your blood glucose goes below
70 mg/dL (3.9 mmol/L)? If your blood sugar goes below 70 mg/dL (3.9
mmol/L), you can expect your alarm to sound 83% of the time and not to
sound approximately 17% of time within the 15 minute period before or
after your blood sugar goes below 70 mg/dL(3.9 mmol/L).
The High Glucose Alert
Estimates of how well the adjustable High Glucose Alert performs are
presented in Table 6.