Which of the following is correct for 1-rescuer Adult CPR?

The proper ratio for 1-rescuer adult CPR is 30 compressions followed by 2 breaths. This guideline is established to maximize blood circulation and oxygen delivery during cardiac arrest. The chest compressions help maintain blood flow to vital organs, resulting in a higher chance of survival during emergencies. After every 30 compressions, providing 2 rescue breaths allows for ventilation to deliver oxygen to the lungs, which is crucial for resuscitation.

The choice of 30 compressions to 2 breaths is based on recommendations from organizations like the American Heart Association and is designed for optimal performance during life-saving situations. This systematic approach simplifies the CPR process, making it easier for rescuers to remember and apply effectively, enhancing the chances of restoring circulation until professional medical help arrives.