During adult CPR, as a second rescuer, you should prepare to administer two ventilations after:

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Multiple Choice

During adult CPR, as a second rescuer, you should prepare to administer two ventilations after:

In two-rescuer adult CPR, the cycle is high-quality chest compressions followed by a brief ventilation pause. After completing 30 chest compressions, you deliver two ventilations, then immediately resume compressions and repeat the cycle. This 30:2 rhythm maximizes blood flow to the heart and brain while providing oxygen, without excessive interruptions. Ventilating after only a few compressions or every few seconds would disrupt blood flow too often, lowering perfusion. Ventilating every 5 seconds would also create too many breaths and keep stopping compressions, which isn’t as effective. So the best approach is to administer two ventilations after 30 chest compressions.

In two-rescuer adult CPR, the cycle is high-quality chest compressions followed by a brief ventilation pause. After completing 30 chest compressions, you deliver two ventilations, then immediately resume compressions and repeat the cycle. This 30:2 rhythm maximizes blood flow to the heart and brain while providing oxygen, without excessive interruptions.

Ventilating after only a few compressions or every few seconds would disrupt blood flow too often, lowering perfusion. Ventilating every 5 seconds would also create too many breaths and keep stopping compressions, which isn’t as effective. So the best approach is to administer two ventilations after 30 chest compressions.

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