ZOLL AED PLUS Administrator’s Guide
33
Rectilinear Biphasic Waveform Characteristics
The following table shows the Rectilinear Biphasic waveform’s characteristics when discharged into
25 ohm, 50 ohm, 100 ohm, and 125 ohm loads at a maximum energy setting of 200 Joules.
Table 9: Biphasic Waveform
The efficacy of ZOLL's Rectilinear Biphasic Waveform has been clinically verified during a
Ventricular Fibrillation (VF) and Ventricular Tachycardia (VT) defibrillation study. This study (which
was conducted using ZOLL M Series defibrillators) and the findings are described below. Since the
ZOLL AED Plus's rectilinear biphasic waveform employs the same first and second phase timing,
similar first and second phase currents/voltages and essentially the same mechanisms for controlling
defibrillation waveshape, the ZOLL M Series and ZOLL AED Plus defibrillation waveforms are
considered substantially equivalent.
Discharged
into 25 ohm
load
Discharged
into 50 ohm
load
Discharged
into 100 ohm
load
Discharged
into 125 ohm
load
First Phase
Maximum Initial
Current
32 A
26 A
21 A
17 A
First Phase
Average Current
28 A
22A
16 A
13 A
First Phase Duration
6 ms
6 ms
6 ms
6 ms
Interphase duration
between first and second
phases
150
µ
sec
150
µ
sec
150
µ
sec
150
µ
sec
Second Phase Maximum
Initial Current
33 A
19 A
12 A
11 A
Second Phase Average
Current
21 A
14 A
11 A
10 A
Second Phase Duration
4 ms
4 ms
4 ms
4 ms
