Dexcom G4 Platinum User Manual page 53

CONTRAINDICATION
Remove the Dexcom G4 PLATINUM Sensor,
MR
Transmitter, and Receiver before Magnetic
Resonance Imaging (MRI), Computed
Tomograph (CT) scan, or diathermy treatment. The
device is MR Unsafe. Do not bring any portion of the
device into the MR environment. The Dexcom G4
PLATINUM System has not been tested during MRI or
CT scans or with diathermy treatment. The magnetic
fields and heat could damage the device so that it might
not display sensor glucose readings or provide alerts,
and you might miss a low or high blood glucose value.
PRECAUTION
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.
Dexcom G4 PLATINUM (Pediatric) System User's Guide | 51