User`s guide

30 | Dexcom G4 PLATINUM Professional Continuous Glucose Monitoring System
2
insertion, if the system is used multiple times. Using the
same site too often might not allow the skin to heal, and
might cause scarring or skin irritation.
•Avoidinsertingthesensorinareasthatarelikelytobe
bumped, pushed or compressed or areas of skin with
scarring, tattoos, or irritation as these are not ideal sites
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