Rescue breaths on adults are given at what rate?

• A. 1 breath every 3 seconds
• B. 1 breath every 5 seconds
• C. 2 breaths per minute
• D. 1 breath every 10 seconds

Answer: (B)

In adult CPR, rescue breaths are given at a rate of about one breath every five seconds, which is roughly 12 breaths per minute. This pace provides enough oxygen to the lungs without interrupting chest compressions too long or causing hyperventilation. Each breath should last about a second and cause visible chest rise.

Rates that are too fast (like one every 3 seconds) can lead to hyperventilation and increased intrathoracic pressure, reducing venous return. Rates that are too slow (like one every 10 seconds or only two breaths per minute) don’t supply enough oxygen. Therefore, one breath every five seconds is the best choice.