Step Two: Check for Breathing
The next step is to check for breathing. When the victim is unconscious, look for signs of breathing. The chest should rise and fall when breathing. In addition, you must hear and feel breathing to be sure that the person is actually breathing. Bring your face close to the victim's mouth and nose so that you can hear and feel the air as they exhale. As you do this, observe the rise and fall of your chest. Do this for a full 5 seconds
When the victim is not breathing, you should help him to do so by blowing air through his mouth. Pinch his nostrils and take two full puffs first. Then you need to perform one injection at a time. This procedure is called artificial ventilation.