What is the correct compression-to-breath ratio for adult CPR performed by a single rescuer?

In adult CPR performed by a single rescuer, the correct compression-to-breath ratio is 30 compressions to 2 breaths. This ratio is designed to ensure that the victim receives sufficient blood circulation through chest compressions while also allowing for adequate ventilation. The emphasis on a 30:2 ratio promotes effective and efficient CPR, maximizing the chances of restoring circulation and oxygenation to the vital organs.

The rationale behind this specific ratio lies in the importance of maintaining a high compression rate during CPR. Studies have shown that compressions are more critical than breaths in the early stages of cardiac arrest, particularly in adults, where high-quality chest compressions can significantly improve survival outcomes. After performing 30 compressions, the rescuer gives 2 breaths to provide the necessary oxygen to the lungs, which is particularly important in cases of respiratory arrest.

This method balances the need for continuous blood flow through chest compressions with the need for breathing support, making it a standardized approach taught in CPR courses. The other ratios do not align with current CPR guidelines and may not provide the same effectiveness in a real-life emergency situation.