Immediately. Contacting professional emergency services is the first step in emergencies requiring CPR. Have someone else contact them if others are present; do it yourself if others are not.
For giving CPR, an adult is defined as someone over the age of 12 by the American Red Cross.
If it's an adult, you should immediatly before CPR. If its a child, you should do CPR for 5 minutes and then call. It's approximately 2 Minutes for the infant or child. ~Jason, just passed his FirstAid/CPR Taining.
When a lay person with no CPR training is on the phone with 911 and the dispatcher is giving instructions to the lay rescuer
Call 911 before you start CPR.
at the center of sternum
For an adult, call 911 first. For an infant or child, perform 2 minutes of CPR or rescue breathing as applicable first and then call 911. Better yet, if possible, have someone else call 911 while you take care of the victim.
Adult, Child, Infant 1-rescuer CPR is 30 Compressions : 2 Breaths.
Place your hands in the middle of the chest on the sternum.
CPR can be performed alone. Take periodic CPR classes and tests to prevent this problem of forgetting. The best advice I can give is, god forbid this happens call 911 right away, and if you remember correctly begin giving CPR. Your 911 operator, will most likely help you through it anyway. So don't sweat it. I hope I helped. Thanks, and have a great day/night.
You should contact 911 if you have not already. Also check for a pulse, if there is not one present begin CPR.
According to the related link, Actar Airforce Inc., Toronto, ON, Canada manufactures the Actar 911 CPR mannequin.
Adult CPR is needed for whenever someone needs aid in breathing. Therefore, it can be any age that needs it, as long as the person has a certification in CPR for legal reasons. The word "adult" refers to at least age 18, so adult CPR is CPR for those 18 and over only.