CPR in adults is very easy but there is much controversy over what age is an adult and which age is a child. Since the heart size is determined by the size of the person and not the age of the person, always go by if the 8 year old looks like he could be 12, then treat him as an adult. But if the 10 year old looks like she is about 7, then treat her as a child.
The very first thing you do is, secure the area. You are looking for anything that may have made this person need help. If there is a liquid around them and you can’t identify it, stay away from it! If you determine the area is safe, then you can continue to step 2. If the area is unsafe, look and see if it is possible for you to move the person out of that area without risking your own safety. If you can move them, then that is great! However, if you cannot then you must just stop, call 911, and keep the area clear until medical assistance arrives.
Second, appoint someone to call 911 for you. However, you want to be very specific “Hey you, in the red shirt, go call 911 and get back with me!” Now you want to check and see if the person is conscious. While tapping their arm or foot, yell as loud as possibly “Hey, are you okay?” If you get a response, then you are done, if not then move on. You need to do a complete quick examination of the body with your hands, looking for any additional injuries. Next, you are going to place your ear up to their mouth and your index and middle finger on their choroid artery. Look down the chest to see if it is rising and falling, also feel for breath on your ear and checking their pulse. If you have neither, begin CPR.
The counts are simple it is 30 compressions to 2 breaths. This is the same for 1 or two rescuers. The first thing you do is tilt their head back to open the airway. Now, place your barrier method over their nose and mouth, and breathe in 2 long breaths, each about a second. While doing this, watch for their chest rising and falling. If it does not, retilt their head, and try the two breaths again. If this does not work, you are going to have to perform the Heimlich maneuver before you can proceed.
Now you are ready for compressions, place your fingers where the ribs and stomach meet. With your fingers, follow the ribcage up to where the 2 sets of ribs meet up. Place two fingers here to mark the spot, now place the other hand in front of those fingers. Lift up your fingers and place your hand on top of the other, lace your fingers together. With your knees firmly pressed against them, start applying the 30 compressions (about 1 ½ to 2 inches deep). Begin the cycle again. You are going to do this for 5 cycles, check for a pulse and breathing. If the person is still not breathing, continue these cycles of CPR until medical attention arrives.