User`s guide

168 | Dexcom G4 PLATINUM (Pediatric) Continuous Glucose Monitoring System

glucose level was at or below the alert setting within 15 or 30 minutes

before or after the device alarmed. The False Alert Rate is the percent

of time the device alarmed when the blood glucose level was above the

alert setting within 15 or 30 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 47% of the time

(pediatric study) or 79% of the time (adult study) and not be below 70

mg/dL (3.9 mmol/L) approximately 53% of the time (pediatric study) or

21 % of the time (adult study) 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 percent of time the blood

glucose level was at or below the alert setting and device alarmed within

15 or 30 minutes before or after the blood glucose was at or below the

alert settings. The Hypoglycemia Missed Detection Rate is the percent

of time the blood glucose was at or below the alert setting, but the

device did not alarm within 15 or 30 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 50% of the time (pediatric

study) or 83% of the time (adult study) and not to sound approximately

50% of the time (pediatric study) or 17% (adult study) 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