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
signicantrate,typicallymorethan2mg/dLperminute.
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
signicantriseorfallofbloodglucosemayaffectaccuracy
of sensor glucose readings.
• The system accuracy may be affected when your glucose