6 Manual Defibrillation and Cardioversion Preparing for Defibrillation
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Using Pediatric Paddles
The HeartStart MRx’s external paddle set comes with pediatric paddles included. The American Heart
Association recommends using pediatric paddles on children weighing < 10 Kg (larger paddles may be
used as long as contact between the paddles is avoided).
To use the pediatric paddles set:
1 Depress the latch at the front of the external paddle set while pulling forward on the adult paddle
electrode.
2 Store the adult paddle electrodes in the paddle tray pockets.
3 To defibrillate, see “Using External Paddles” on page 75.
NOTE Impedance is the resistance between the defibrillator’s pads or paddles that the defibrillator must
overcome to deliver an effective discharge of energy. The degree of impedance differs from patient to
patient and is affected by several factors including the presence of chest hair, moisture, and lotions or
powders on the skin.
The low-energy SMART Biphasic waveform is an impedance-compensating waveform that is designed
to be effective across a wide range of patients. However, if you receive a “No Shock Delivered”
message, check that the patient’s skin has been washed and dried and that any chest hair has been
clipped. If the message persists, change the pads and/or the pads cable.
Using Internal Paddles
To defibrillate using internal paddles:
1 Select the appropriate paddle electrode size.
2 If using switchless internal paddles, connect the paddles to the M4740A Paddle Adapter Cable.
3 Connect the paddles cable (or the paddle adapter cable) to the HeartStart MRx by aligning the
pointer on the paddles cable (or paddle adapter cable) with the white arrow on the green Therapy
port. Then push until you hear it click into place. See Figure 46.
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