What is the purpose of providing effective ventilation during CPR?

The purpose of providing effective ventilation during CPR is to ensure oxygenation of vital organs. In a cardiac arrest situation, the heart fails to pump blood effectively, which means that oxygen-rich blood is not being delivered to the brain and other essential organs. During CPR, particularly when using rescue breaths, the goal is to supply oxygen directly into the lungs, allowing it to enter the bloodstream. This oxygenation is crucial for preventing brain damage and other organ dysfunction due to hypoxia, which can occur rapidly if oxygen delivery is not restored. By focusing on effective ventilation, rescuers help to maintain critical blood oxygen levels until further medical assistance can restore circulation.