User`s guide

Dexcom G4 User’s Guide | 9
• Avoid 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.
• Avoid injecting insulin or placing an insulin pump infusion set within 7.62 cm of
the sensor in case the insulin affects the sensor glucose readings.
•
The sensor is sterile in its unopened, undamaged package. Do not use any
sensor if its sterile package has been previously damaged or opened.
• To calibrate the system, you must 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 ago could result in inaccurate sensor
glucose readings.
•
The transmission range from the transmitter to the receiver is up to 6 meters
without obstruction. Wireless communication does not work well through water
so the range is much less if you are in a pool, bathtub, water bed, etc.
• Sensors should be stored at temperatures between 2° C - 25° C for the length
of the shelf life. You may store your sensors in the refrigerator if it is within this
temperature range. Sensors should not be stored in a freezer.
• Keep the USB port cover on the receiver closed whenever the USB cable is not
attached. The receiver may malfunction if water gets into the USB port.