CU Medical Systems Paramedic CU-ER1, Руководство оператора, Страница: 94 / 115

CU-ER1 Operator’s Manual _ver 3.00
2. more
e
fficient than monophasic waveform
The electrical therapy delivered by transthoracic cardiac
defibrillators has changed little since the introduction of
direct-current defibrillation more than 30 years ago.
Throughout this time, the industry-standard shock
waveform for external defibrillators has been a
monophasic damped sine (MDS) waveform, in which
current flows in one direction throughout the shock.
Many well-organized emergency medical systems, using
monophasic devices for early defibrillation, have
documented better than 20% survival to hospital
discharge for cardiac arrest patients found in ventricular
fibrillation (VF). Attempts to improve this survival rate
have adapted proposals to change the waveform and energy level of defibrillation shocks.
[6]
Biphasic waveform defibrillators incorporate two-way current flow in which electrical
current first flows in one direction, then reverses direction approximately midway through
the shock delivery.
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