Dexcom G4 Platinum User Manual page 29

the rising or falling single arrow or double arrow, which
indicates that your blood glucose is rapidly rising or falling.
Calibrating during significant rise or fall of blood glucose
may affect sensor accuracy and could result in you missing
severe hypoglycemia (low blood glucose) or hyperglycemia
(high blood glucose) events.
• The system accuracy may be affected when your glucose
is changing at a significant rate (e.g., 2-3 mg/dL/min or
more than 3 mg/dL each minute), such as during exercise
or after a meal.
• Avoid separating the transmitter and receiver by more than
20 feet. The transmission range from the transmitter to
the receiver is up to 20 feet without obstruction. Wireless
communication does not work well through water so the
range is much less if you are in a pool, bathtub, or on a
water bed, etc. Types of obstruction differ and have not
been tested. If your transmitter and receiver are farther
than 20 feet apart or are separated by an obstruction, they
might not communicate or the communication distance may
be shorter and result in you missing severe hypoglycemia
(low blood glucose) or hyperglycemia (high blood
glucose) events.
• Keep the USB port cover on the receiver closed whenever
the USB cable is not attached. If water gets into the
USB port, the receiver could become damaged and stop
displaying readings or providing alerts and result in you
missing severe hypoglycemia (low blood glucose) or
hyperglycemia (high blood glucose) events.
• Do not use alternative blood glucose site testing (blood
from your palm or forearm, etc.) for calibration. Alternative
site blood glucose values may be different than those
taken from a fingerstick blood glucose value and may not
Dexcom G4 PLATINUM (Pediatric) System User's Guide | 27