What is the correct compression to ventilation ratio for 1-rescuer CPR?

The correct compression to ventilation ratio for 1-rescuer CPR is 30:2. This means that for every 30 chest compressions given to a victim, the rescuer should provide 2 rescue breaths. This ratio is designed to ensure that the victim receives an adequate amount of blood flow during compressions while also supplying necessary oxygen through rescue breaths.

The ratio reflects the current guidelines recommended by organizations such as the American Heart Association for adult CPR in a one-person scenario. It optimizes the balance between effective chest compressions, which are vital for maintaining circulation, and the timely provision of ventilations, necessary for oxygenation.

In contrast, other potential ratios such as 15:2 or 20:2 deviate from these established guidelines, and a ratio of 30:1 does not provide sufficient ventilation compared to compressions. Thus, adhering to the 30:2 ratio is crucial for effective CPR in emergency situations.