What is the standard ratio of chest compressions to rescue breaths in adult CPR?

What is the standard ratio of chest compressions to rescue breaths in adult CPR?

• A. 30 compressions to 2 breaths.
• B. 15 compressions to 2 breaths.
• C. 30 compressions to 5 breaths.
• D. 10 compressions to 1 breath.

Answer: (A)

In adult CPR, keeping blood flowing is the top priority, so the standard cycle is 30 chest compressions followed by 2 rescue breaths, repeated until help arrives or the person starts breathing. This ratio strikes a balance: many compressions help circulate oxygen-poor blood, and the two quick breaths provide needed oxygen without causing long delays between compressions. The alternative of 15 compressions to 2 breaths is used in some pediatric two-rescuer scenarios, not for adults. A ratio of 30:5 would extend breathing pauses and slow the flow of blood, while 10:1 would under-ventilate and again disrupt perfusion. So the correct approach for adult CPR is 30 compressions to 2 breaths.

In adult CPR, keeping blood flowing is the top priority, so the standard cycle is 30 chest compressions followed by 2 rescue breaths, repeated until help arrives or the person starts breathing. This ratio strikes a balance: many compressions help circulate oxygen-poor blood, and the two quick breaths provide needed oxygen without causing long delays between compressions. The alternative of 15 compressions to 2 breaths is used in some pediatric two-rescuer scenarios, not for adults. A ratio of 30:5 would extend breathing pauses and slow the flow of blood, while 10:1 would under-ventilate and again disrupt perfusion. So the correct approach for adult CPR is 30 compressions to 2 breaths.