For purposes of CPR (Cardiopulmonary Resuscitation), the primary goal is to preserve brain function and maintain circulation during cardiac or respiratory arrest until spontaneous breathing and heartbeat can be restored. CPR is performed through chest compressions, often combined with artificial ventilation, to restore partial flow of oxygenated blood to the brain and heart, thus delaying tissue death and extending the opportunity for successful resuscitation without permanent brain damage. It is indicated for individuals who are unresponsive and not breathing normally, such as in cardiac arrest cases.
CPR does not usually restart the heart by itself but supports vital organ function until further interventions, such as defibrillation, can be applied to restore a viable heart rhythm. It is critical to perform high-quality chest compressions at a recommended rate and depth to keep blood circulating, as the brain can sustain damage within minutes if blood flow stops.
In summary, the purpose of CPR is to:
- Maintain blood flow and oxygen delivery to vital organs during cardiac or respiratory arrest.
- Delay brain and tissue death.
- Provide a window of opportunity for advanced resuscitation efforts like defibrillation.