How often should rescue breaths be given during CPR?

In the context of Basic Life Support (BLS), rescue breaths should be delivered every 5 to 6 seconds for adults during CPR. This timing ensures that the breaths are given at an appropriate rate to allow for effective ventilation without interrupting the circulation provided by chest compressions. The recommended ratio is typically 30 chest compressions followed by 2 rescue breaths, and the breaths should be administered at this specified interval to maintain adequate oxygenation of the patient's lungs.

This approach targets both the prevention of hyperventilation—where too much air is provided, potentially leading to complications—and the need for continuous chest compressions that help circulate blood. The correct frequency helps optimally manage the patient’s oxygen needs while still maintaining effective circulation.