Which CPR technique involves 30 compressions followed by 2 breaths?

The technique that involves a cycle of 30 chest compressions followed by 2 breaths is the standard method taught for both adult and child CPR when the rescuer is trained in giving rescue breaths. However, in the context of this question focusing specifically on adults, this method is critical because adult cardiac arrest cases often benefit from providing ventilations in conjunction with compressions.

In adult CPR, the recommended compression-to-breath ratio is 30 to 2. This method helps ensure that blood flow is maintained to vital organs while also providing oxygen, which is essential in cases of respiratory obstruction or where the heart is not functioning effectively. This ratio is particularly important when there is a witness to the collapse and the CPR is initiated early, as it can significantly improve chances of survival.

The other options refer to techniques that either do not require breaths (like Hands-Only CPR and Compress-Only CPR) or apply to children, where the ratio may vary. Understanding this distinction is key in recognizing when to apply these techniques appropriately based on the age and condition of the victim.