Which of the following best describes the "compression to ventilation" ratio for adult CPR?

The "compression to ventilation" ratio for adult CPR is 30:2. This means that for every 30 chest compressions given, rescuers should provide 2 rescue breaths. This ratio is established to optimize the efficacy of CPR by ensuring that the heart receives adequate blood circulation through compressions while also providing oxygen to the lungs through ventilations.

The 30:2 ratio is significant because it allows providers to deliver a high number of compressions within a short timeframe, which is crucial in maintaining circulation and keeping oxygenated blood flowing to vital organs during cardiac arrest. This approach is supported by guidelines from resuscitation organizations and is aimed at maximizing the chances of survival for the patient.

The other options present ratios that are not the recommended standard for adult CPR. While variations exist for CPR in different situations, such as for children or infants, the adult CPR standard is firmly established as 30 compressions followed by 2 breaths. Understanding this ratio is essential for efficient CPR application and ultimately for improving outcomes in cardiac arrest situations.