DATREND Systems AMPS-1, Руководство по эксплуатации

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AMPS-1 OPERATING MANUAL
The "Emergency 2" scenario generates this sequence of ECG rhythms:
• ten NSR beats at 80 BPM
• 25 beats of ventricular tachycardia at180BPM
• continuous ventricular fibrillation thereafter, until "defibrillation" via AMPS-1
keypad or an external trigger signal at "DEFIB IN"
The "Elective Cardioversion" scenario of AMPS-1 produces an atrial fibrillation
waveform (AFIB). For defibrillation to be effective, the "discharge" must be properly
synchronized to the ECG R-wave. If a trigger pulse is detected by AMPS-1 and is
/-100 milliseconds of the R-wave, defibrillation is successful and the ECG will
then convert to a normal sinus rhythm. If a trigger pulse is detected more than +/-100
milliseconds from the R-wave, defibrillation is late and the ECG will then change to
ventricular fibrillation.
4.4.4 Defibrillator Discharge Simulation
While simulating EMERGENCY 1, EMERGENCY 2, or ELECTIVE CARDIOVER,
AMPS-1 will accept a trigger pulse applied via the "DEFIB IN" jack as previously
described. In response to a trigger at the correct time, a large negative-going transient
will then appear on the simulated ECG, followed by a gradual recovery of the baseline
and a change in rhythm to NSR. The simulated ECG transient is always negative-going,
regardless of the polarity of the trigger voltage applied at the "DEFIB IN" jack.
As an alternative to an external trigger signal, DEFIB NOW of the AED submenu may
be selected after initiating the desired emergency or cardioversion simulation. For the
cardioversion simulation, selecting DEFIB NOW will most likely change the ECG
from AFIB to ventricular fibrillation, unless by remote chance the ENTER key is
pressed in perfect synchronism with the ECG R-wave, in which case the ECG will
change from AFIB to NSR.
Alternatively, DEFIB R SYNC can be selected after the elective cardioversion
simulation has been initiated. In this case, AMPS-1 will delay the simulated discharge
until the R-wave of the ECG occurs. Accordingly, DEFIB R SYNC provides an ideal
illustration of a successful cardioversion.
Arrhythmias/Chapter 4
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