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Table 3 AED 2 test results

From: Radiated radiofrequency immunity testing of automated external defibrillators - modifications of applicable standards are needed

Device designation

Type of interference observed

Field strength for worst-case failure (V/m)

Modulation

(Hz)

Frequency range of failure (MHz)

Device's behavior (Observations from user standpoint)

Notes

AED2

False negative

3

1 Hz pulsed (square wave)

43-46

Verbal response after analyze mode:

"Interference detected" then

"No shock advised"

V-Fib applied -

No shock advised

Interference 8× higher amplitude than normal ECG

AED2

False negative

20

1 Hz pulsed (square wave)

300-322; 366-370, and 900-915

Buzz was heard in the audio from the device.

V-Fib applied - voice prompts interfered by buzzing sound

AED2

False positive

4

3 Hz pulsed (square wave)

31-34 42-47

Verbal warning after analyzing heart rhythm:

"Shock advised" at 47-49 MHz

NSR applied -"shock advised"

RF caused spikes in ECG. Interpreted as fibrillation.

Shock canceled at 34 MHz