PHILIPS MEDICAL SYSTEMS
F-3
F
RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE
AND MOBILE RF COMMUNICATIONS EQUIPMENT AND THE
HEARTSTART FR2+ DEFIBRILLATOR
The HeartStart FR2+ Defibrillator is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled. The customer or
the user of the FR2+ can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the FR2+ as recommended
below, according to the maximum output power of the communications
equipment.
a. Generally, AEDs are sometimes susceptible to interference generated by patient and/or responder motion in environments in which a
high static electric field is present (e.g., low humidity, synthetic carpets, etc.). As a safety measure, Philips AEDs incorporate a patented
method to sense possible corruption of the ECG signal by such interference and to respond by directing the user to stop all motion. In
these cases, it is important to minimize movement in the vicinity of the patient during rhythm analysis in order to ensure that the signal
being analyzed accurately reflects the patient’s underlying heart rhythm.
b. The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6,765 MHz to 6,795 MHz; 13,553 MHz to 13,567
MHz; 26,957 MHz to 27,283 MHz; and 40,660 MHz to 40,700 MHz.
c. Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur
radio, AM and FM radio broadcast, and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the HeartStart FR2+ is used exceeds the applicable RF compliance level above, the HeartStart FR2+ should be
observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as re-orienting
or relocating the HeartStart.
rated maximum output
power of transmitter (W)
separation distance according to frequency of transmitter (m)
80 MHz to 800 MHz
d = 0.6
√
P
800 MHz to 2.5 GHz
d = 1.15
√
P
0.01 0.06 0.115
0.1 0.19 0.36
10.6 1.15
10 1.9 3.64
100 6.0 11.5
For transmitters rated at a maximum output power not listed above, the recommended separation distance
d in meters (m) can be determined using the equation applicable to the frequency of the transmitter, where P
is the maximum output power rating of the transmitter in watts (W) according to the transmitter
manufacturer.
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