In CPR, what is the correct ratio of chest compressions to rescue breaths?

In CPR, what is the correct ratio of chest compressions to rescue breaths?

• A. 60:0
• B. 2:30
• C. 15:1
• D. 30:2

Answer: (D)

In adult CPR with a single rescuer, the pattern is thirty chest compressions followed by two rescue breaths, and you repeat this cycle. This ratio balances keeping blood flowing to vital organs with providing enough oxygen to the lungs. Chest compressions sustain circulation, delivering oxygen to the brain and heart, while the breaths refresh the lungs so oxygen can be carried by the blood. The 30:2 sequence is simple to remember and fits the recommended compression rate of about 100–120 compressions per minute. The other options don’t provide that balance. Continuous compressions without breaths would deprive the body of oxygen, making long-term survival harder. Starting with breaths or reversing the order disrupts the typical rhythm used to maintain perfusion. The 15:2 pattern is used in different scenarios, such as two rescuers and often for children, not the standard for an adult performing CPR alone.

In adult CPR with a single rescuer, the pattern is thirty chest compressions followed by two rescue breaths, and you repeat this cycle. This ratio balances keeping blood flowing to vital organs with providing enough oxygen to the lungs. Chest compressions sustain circulation, delivering oxygen to the brain and heart, while the breaths refresh the lungs so oxygen can be carried by the blood. The 30:2 sequence is simple to remember and fits the recommended compression rate of about 100–120 compressions per minute.

The other options don’t provide that balance. Continuous compressions without breaths would deprive the body of oxygen, making long-term survival harder. Starting with breaths or reversing the order disrupts the typical rhythm used to maintain perfusion. The 15:2 pattern is used in different scenarios, such as two rescuers and often for children, not the standard for an adult performing CPR alone.