Philips M3861A, M3860A manual Category Nominal specifications, Waveform Parameters

B-2

category	nominal specifications
EMI (Immunity)	Meets EN 60601-1-2 limits (1993), method EN 61000-4-3:1998 Level 2 (3 V/m
	and 10 V/m at 26 MHz to 1 GHz).
Aircraft: Method	Meets RTCA/DO-160D:1997 Section 21 (Category M - Charging).
	Defibrillator

	category		nominal specifications
Waveform Parameters		Biphasic truncated exponential. Waveform parameters are automatically adjusted as a
		function of patient defibrillation impedance. In the diagram at left, A is the duration of phase
		1 and B is the duration of phase 2 of the waveform, C is the interphase delay, Vp is the peak
		voltage, and Vf the final voltage.
		The HeartStart FR2+ delivers shocks to load impedances from 25 to 180 ohms.
		The duration of each phase of the waveform is dynamically adjusted based on
		delivered charge, in order to compensate for patient impedance variations, as
		shown below:
			adult defibrillation
		load	phase 1	phase 2	delivered
		resistance (ohms) duration (ms)		duration (ms)	energy (J)
		25	2.8	2.8	140
		50	4.09	4.09	150
		100	9.0	6.0	157
		125	12.0	8.0	161
		150	12.0	8.0	157
			pediatric defibrillation
		(using M3870A FR2 infant/child reduced-energy defibrillator pads)
		load	phase 1	phase 2	delivered
		resistance (ohms) duration (ms)		duration (ms)	energy (J)
		25	4.1	4.1	35
		50	5.8	3.8	48
		100	7.2	4.8	55
		125	7.2	4.8	54
		150	9.0	6.0	55
		NOTE: The values given are nominal. Because of the effect of the M3870A FR2

infant/child pads’ attenuation circuitry on the defibrillator’s impedance compensation feature, the actual phase durations for a given load resistance on the table above could be those of an adjacent row.

P hili ps Me dical Sy stems

M3860A/M3861A HEARTSTART FR2+