Danger – check that there is no danger to you or others.
Response – check if the person is responsive (to your voice or touch).
Airway – look at the person’s mouth and nose and remove obvious obstructions such as vomit, blood, food or loose teeth. (Only put the person on their side to clear the mouth and nose if the airway is still obstructed, then put them back on their back on a firm surface to commence chest compressions.)
Breathing – check if the person is breathing normally (gasping is not normal breathing). If the person is breathing normally place into the recovery position and wait for help. If they are not breathing normally, start CPR.
Start CPR – place one hand on the centre of the person’s chest, with your other hand on top and interlock your fingers. With the heel of the bottom hand, press down by one-third of the chest depth, at a steady rate, slightly faster than one compression per second. For smaller children and toddlers use the heel of one hand only. After every 30 chest compressions, give two rescue breaths.
Rescue breaths – Check that the mouth and airway are clear of blood, vomit, and loose teeth or food. One hand is placed on the forehead or top of the head. The other hand is used to provide chin lift. The head (NOT the neck) is tilted backwards. It is important to avoid excessive force, in case of possible neck injury. Pinch the person’s nose. Take a breath and seal your mouth over their mouth and blow steadily and firmly into their mouth. Check that their chest rises. Perform 2 rescue breaths, lasting just over 1 second.
Continue with cycles of 30 chest compressions then 2 rescue breaths until the person begins to recover or emergency help arrives.
Defibrillate – attach an AED (automated external defibrillator) if available and follow the prompts.
A person may show signs of recovery by moving, breathing normally, coughing or talking.
Source: HealthDirect.gov.au