Appendix C: Electromagnetic Interference Information - Abbott FreeStyle Navigator User Manual

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Appendix C: Electromagnetic Interference Information

19 Appendix C: Electromagnetic Interference
Information
Electromagnetic Interference and Your FreeStyle Navigator
Continuous Glucose Monitoring System
Important Information about Electromagnetic Interference
The FreeStyle Navigator Transmitter and Receiver communicate using radio-frequency waves. The
FreeStyle Navigator system has been designed to be reliable and immune to common electromagnetic
interference so that it is not influenced by such interference. However, under rare circumstances, if you
happen to be in an environment of strong electromagnetic radiation, there may be some interference.
Examples of possible sources of interference are: retailer doorways, supermarket checkout counters,
metal detectors like those used in airport security systems or electronic surveillance devices, and
radio-transmitting devices such as mobile phones, 2-way radio and cordless phones.
Interference may occur in the vicinity of equipment marked with the symbol.
If such interference happens, it tends to be temporary. This makes it unlikely that you will experience
any noticeable difference in the performance of the system. In the event of electromagnetic
interference, you may experience loss of communication between the receiver and transmitter, you
may see unrecognisable characters on the receiver display screen or you may not see continuous
glucose results. The system is designed to alert you of these conditions through audio (beep or vibrate)
or visual (icons, unrecognisable characters on the screen or lack of glucose results) means.
If you observe a significant change in your continuous glucose readings that you think is erroneous, or
if you feel the blood glucose measurement in the Blood Glucose mode is erroneous and you are close
to an electromagnetic interference source, move away from the source of interference and check to see
if the condition fades away. Always maintain a minimum separation distance from potential sources of
electromagnetic interference (see Tables 2 and 3 in this Section for guidance).
Depending on your distance from the source of interference, the strength of the interfering signal,
and the relative orientation between you and the source of interference, you may or may not see or
experience these conditions. When in doubt, move away from any likely source of electromagnetic
interference. If you experience consistent interference from any source, contact the manufacturer or
dealer for that source and have a trained technician assess the situation. In addition, please report any
consistent interference issues to Abbott Diabetes Care Customer Care.
If you have a medical appointment that includes X-ray, MRI (Magnetic Resonance Imaging), CT
(Computed Tomography) scan or another type of exposure to radiation, keep your system and sensor
away from the area. Before exposure to such radiation, discard any sensor you are wearing and insert a
new sensor after the radiation session. The effect of these types of radiation on the performance of the
system has not been evaluated.
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