User`s guide

76 | Dexcom G4 PLATINUM (Pediatric) Continuous Glucose Monitoring System
7
Only use blood glucose values between 40-400 mg/dL for calibration. If
the blood glucose value you enter is outside of this range, the receiver
will not calibrate. You must wait until your blood glucose is in this range
to calibrate.
These steps show you how to enter your blood glucose values
for calibration:
PRECAUTION
To calibrate the system, do enter the exact blood
glucose value that your blood glucose meter displays
within 5 minutes of a carefully performed blood glucose
measurement. Do not enter sensor glucose readings
for calibration. Entering incorrect blood glucose values,
blood glucose values obtained more than 5 minutes
before entry, or sensor glucose readings might affect
sensor accuracy and could result in you missing severe
hypoglycemia (low blood glucose) or hyperglycemia (high
blood glucose) events.
PRECAUTION
Do not calibrate if your blood glucose is changing at a
signicantrate,typicallymorethan2mg/dLperminute.
Do not calibrate when your receiver screen is showing
the rising or falling single arrow or double arrow, which
indicates that your blood glucose is rapidly rising or
falling.Calibratingduringsignicantriseorfallofblood
glucose may affect sensor accuracy and could result in
you missing severe hypoglycemia (low blood glucose) or
hyperglycemia (high blood glucose) events.