Dexcom G4 Platinum User Manual page 134

11
Methodology for the Hypoglycemia Detection Rate includes if the sensor glucose
value is at or below the low alert level 15 or 30 minutes before and 15 or 30
minutes after the actual low glucose event. This does not include any predictive
alert contribution.
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 87% of the time and not to sound approximately 13% of the
time within the 30 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 4.
Table 4.
Hyperglycemic Alert Evaluation
Hyperglycemic
True Alert
Alert Level
Rate
mg/dL (mmol/L)
120 (6.7) 95%
140 (7.8) 94%
180 (10.0) 92%
200 (11.1) 92%
220 (12.2) 91%
240 (13.3) 91%
300 (16.7) 82%
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 soulds, you can expect your blood sugar to be at or above
200 mg/dL (11.1 mmol/L) approximately 8% of the time within the 15 minute
period before or after your alarm sounds.
134 | Dexcom G4 PLATINUM Continuous Glucose Monitoring System
False Alert Hyperglycemia
Rate Detection Rate
5% 98%
6% 97%
8% 97%
8% 97%
9% 95%
9% 94%
18% 86%
Hyperglycemia
Missed Detection
Rate
2%
3%
3%
3%
5%
6%
14%