ZOLL Propaq MD Rev A - Manual (Page 19)

Propaq MD Product Functions
9650-0805-01 Rev. A Propaq MD Operator’s Guide 1-9
Propaq MD Product Functions
Defibrillator Function
The Propaq MD contains a direct current (dc) defibrillator capable of delivering up to 200
joules. It may be used in synchronized mode to perform synchronized cardioversion using the
patient’s R-wave as a timing reference. The unit uses paddles or disposable, pregelled
electrodes for defibrillation.
Defibrillator Output Energy
Propaq MD defibrillators can deliver biphasic energy from 1 joule to 200 joules. The energy
delivered through the chest wall, however, is determined by the patient’s transthoracic
impedance. An adequate amount of electrolyte gel must be applied to the paddles and a force of
10 to 12 kilograms (22 to 26.4 pounds) must be applied to each paddle in order to minimize this
impedance. If hands-free therapy electrodes are used, make sure that they are properly applied.
(Refer to the instructions on the electrode package).
External Pacemaker
Propaq MD defibrillators include a transcutaneous pacemaker consisting of a pulse generator
and ECG-sensing circuitry. Noninvasive transcutaneous pacing (NTP) is an established and
proven technique. This therapy is easily and rapidly applied in both emergency and
nonemergency situations when temporary cardiac stimulation is indicated.
The output current of the pacemaker is continuously variable from 10 to 140 mA (the output
current is 0 mA when paused). The rate is continuously variable from 30 to 180 pulses per
minute (ppm), by increments of 5 ppm (10 bpm when greater than 100 ppm).
The pacing output pulse is delivered to the heart via ZOLL hands-free defibrillation/pacing
electrodes placed on the patient’s back and the precordium.
Proper operation of the device, together with correct electrode placement, is critical to
obtaining optimal results. Every operator must be thoroughly familiar with these operating
instructions.
ECG Monitoring
The patient’s ECG is monitored by connecting the patient to the unit via a 3-, 5-, or 12-lead
patient cable or hands-free therapy electrodes. The ECG waveform is presented on the display
along with the following information:
• averaged heart rate, derived by measuring R to R intervals
• lead selection - I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6 (with ECG cable),
PADDLES, or PADS.
• ECG size - 0.125, 0.25, 0.50, 1.0, 2.0, 4.0 cm/mV, AUTO
• status messages
The ECG bandwidth is user selectable.