User`s guide
166 | Dexcom G4 PLATINUM Continuous Glucose Monitoring System
14
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.
Calibration Stability
The System must be calibrated every 12 hours. To demonstrate
performance of the System over a 12-hour calibration period, Systems
were evaluated to verify that performance remains consistent over
the 12-hour calibration period. Systems were evaluated in 2-hour
increments after calibration. Performance was estimated at each 2-hour
intervalandstratiedbyglucosevaluesbycalculatingthepercentageof
System readings within 15 mg/dL or 15%, 20 mg/dL or 20%, 30 mg/dL
or 30%, 40 mg/dL or 40% and greater than 40 mg/dL or 40% of the YSI
values in Table 7.