Canadian Red Cross Basic Life Support (BLS) Practice Test

The recommended ratio of compressions to breaths during adult CPR is 30 compressions for every 2 breaths. This approach aligns with current guidelines emphasizing the importance of chest compressions, which are crucial for maintaining blood circulation during a cardiac arrest. The 30:2 ratio enables rescuers to deliver effective compressions while also ensuring that ventilation is provided to the victim in a timely manner.

This method prioritizes high-quality chest compressions, allowing for adequate blood flow, and the infrequent breaths help to ventilate the lungs without significantly interrupting compressions. The cadence of this ratio also allows the rescuer to maintain a rhythm that is manageable and effective in an emergency situation.

Other ratios would not align with the established best practices for CPR, which focus on maximizing the efficiency of compressions while providing essential ventilations.