Is anyone in danger?
+ If yes, can the danger be easily managed?
+ If it cannot, call for the emergency help and protect the scene.
Move the quietest victim first
+ Gently shakes the shoulders and ask him or her a question.
+ If there is a response, treat any life-threatening condition before checking the next person.
+ If there is no response, check the airway.
Open the airway
+ lift the chin, check the mouth for any obstructions and remove, then tilt the head back gently.
Check for breathing
+ Place your cheek close to his or her mouth and listen and feel for breathing. Look to see if the chest is moving.
If not breathing
+ Give 2 rescue breaths by pinching the nose, sealing your mouth over his or her mouth, and breathing into the person.
+ If you are alone, call for an ambulance as soon as you determine that the victim is not breathing.
Look signs of circulation
+ If the victim is a child, or an adult who has suffered drowning or an accident, proceed direct to CPR(cardiopulmonary resuscitation).
+ Otherwise look for the signs of life such as movement and normal skin color for 10 seconds.
Continue Rescue Breathing
+ Check for signs of circulation every minute.
Start CPR (cardiopulmonary resuscitation)
+ Combine rescue breathing with chest compressions.