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Glossary of AED Terms

IP Rating:
An IP rating, or Ingress Protection Rating, is a system of classifying the degree of protection against both dirt and liquid contamination in electrical goods.

CPR Feedback:
The AED will give clear verbal guidance to the rescuer during a resuscitation attempt, with regard to the correct depth and speed of the chest compressions that are being administered by the rescuer.

Paediatric Pads:
Most AEDs require the use of separate electrode pads for children. These pads are referred to as paediatric pads. The AED recognises when paediatric electrodes are connected and reduces the level of the shock, to protect the heart of younger casualties.  Paediatric electrodes should be used for children under the age of 7 years or weighing less than 25 Kilograms.

Rescue Ready:
The term Rescue Ready means that the AED is ready to be used straight from the box.  There is no need to install batteries or connect electrode pads.

Biphasic vs Monophasic:
Biphasic energy means that the shock is delivered in two directions, whereas Monophasic energy means that the shock is delivered in one direction.  Most AED’s are Biphasic as this technology has been proven to be more effective than monophasic.

Ventricular fibrillation (VF):
A condition in which there is uncoordinated contraction of the cardiac muscle of the ventricles in the heart, making them quiver rather than contract properly. Ventricular fibrillation is the most commonly identified arrhythmia in cardiac arrest casualties.

Ventricular tachycardia (VT):
A type of tachycardia, or rapid heartbeat, that starts in the bottom chambers of the heart, called ventricles. The ventricles are the main pumping chambers of the heart. This is a potentially life-threatening arrhythmia because it may lead to ventricular fibrillationasystole, and sudden death (SCA).

Metronome:
Repeated electronic peeping sound, that the rescuer can use as a guide to the correct speed and rhythm when doing chest compressions during the resuscitation attempt.

Child Key:
A device that is plugged into an AED with adult electrodes pre-connected, this key removes the need for separate paediatric electrodes for child casualties.  The Child key reduces the energy output of the shock to a level more suitable for a child.  The Child Key should not be used when resuscitating an adult or child above the age of 7 years or weighing more than 25 Kilograms.