Dexcom G4 Professional User's Guide download pdf (Page 194)

194 | Dexcom G4 PLATINUM Professional Continuous Glucose Monitoring System

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.

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Dexcom G4 Professional User's Guide Page 194