In terms of ventilation, what is the compression to ventilation ratio for one rescuer during adult CPR?

• A. 15:2
• B. 30:2
• C. 5:1
• D. 10:1

Answer: (B)

The correct ratio for one rescuer performing adult CPR is 30 compressions to 2 breaths. This compression-to-ventilation ratio is crucial because it emphasizes the importance of maintaining blood circulation through chest compressions while also ensuring that oxygen is delivered to the lungs.

The guideline of 30:2 strikes a balance between delivering a sufficient number of compressions to effectively maintain circulation and providing enough ventilations to oxygenate the blood. In a situation where a single rescuer must perform CPR, focusing on compressions first ensures that vital organs receive adequate blood flow, which is critical for survival until emergency medical services arrive.

This ratio also aligns with the current recommendations set forth by organizations such as the American Heart Association, reinforcing the priority of high-quality chest compressions that are deep and at a rate of 100 to 120 compressions per minute.