User`s guide

Dexcom G4 PLATINUM User’s Guide | 25
to measure glucose. Insertion in those areas might affect
sensor performance, and you might miss a low or high
blood glucose value.
Avoid injecting insulin or placing an insulin pump infusion
set within 3 inches of the sensor. The insulin might affect
sensor performance, and you might miss a low or high
blood glucose value.
Do not use the sensor if its sterile package has been
damaged or opened. Using an unsterile sensor might
cause infection.
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.
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 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
signicantriseorfallofbloodglucosemayaffectaccuracy
of sensor glucose readings.
The system accuracy may be affected when your glucose