Dexcom G4 Professional User Manual page 85

7
PRECAUTION
Do not calibrate if your blood glucose is changing at a
significant rate, typically more than 2 mg/dL per minute.
Do not calibrate when your receiver screen is showing
the rising single arrow or double arrow, which indicates
that your blood glucose is rising 2-3 mg/dL/min or more
than 3 mg/dL/min. Also, do not calibrate when your
receiver screen is showing the falling single arrow or
double arrow, which indicates that your blood glucose
is falling 2-3 mg/dL/min or more than 3 mg/dL/min.
Calibrating during significant rise or fall of blood glucose
may affect accuracy of sensor glucose readings.
PRECAUTION
To calibrate the system, enter the exact blood glucose
value that your blood glucose meter displays within
5 minutes of a carefully performed blood glucose
measurement. Entering incorrect blood glucose values or
blood glucose values from more than 5 minutes before
entry might affect sensor performance, and you might
miss a low or high blood glucose value.
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 accept the value for calibration. You must wait until the blood
glucose is in this range to calibrate.
These steps show you how to enter the blood glucose values for
calibration in both real-time and blinded modes:
84 | Dexcom G4 PLATINUM Professional Continuous Glucose Monitoring System