Physio-Control LIFEPAK CR Plus - Manual (Page 60)

A-8 LIFEPAK CR Plus and LIFEPAK EXPRESS Defibrillator Operating Instructions
Specifications
Conclusions
In this double-blinded study, the efficacy of the 200 J BTE shocks was demonstrated to be at least
equivalent to the efficacy of 200 J MDS shocks for defibrillation of short duration, electrically-induced
VF. However, the comparison of efficacy of 130 J biphasic and 200 J monophasic shocks for VF was
inconclusive. All waveforms tested provided a high rate of termination of VT. The VT sample sizes were
too small to statistically determine the relationship between VT success rates of the waveforms tested.
Compared to conventional shocks for VF, we found no positive or negative effect of biphasic shocks for
VF on hemodynamic parameters following the defibrillating shock. It is possible that, compared to 200 J
monophasic shocks, 200 J biphasic shocks will in some cases enable earlier termination of VF.
Therefore, we conclude that biphasic shocks for VF delivered at conventional energy levels have the
potential to improve outcome in resuscitation of victims with sudden cardiac arrest.
Shock
Ventricular Fibrillation
1
st Shock Success
Exact 95% Confidence Interval
200 J MDS 26/28 (93%) 77 to 99%
200 J BTE 22/23 (96%) 78 to 100%
130 J MDS 20/21 (95%) 77 to 100%