What does ABC stand for in first aid CPR when checking an unconscious person?

In first aid and CPR, the acronym ABC stands for Airway, Breathing, and Circulation. This sequence is crucial when assessing an unconscious individual.

Firstly, checking the airway ensures that there are no obstructions, allowing air to flow into the lungs. An unobstructed airway is vital for effective breathing. Next, evaluating breathing involves checking if the person is inhaling and exhaling adequately. If the person is not breathing, immediate intervention is necessary, typically through rescue breaths or CPR. Lastly, assessing circulation focuses on the heart’s function and blood flow. It's important to determine whether the person has a heartbeat and if blood is circulating properly, as this is essential for the delivery of oxygen to vital organs.

Understanding this sequence—Airway, Breathing, and Circulation—enables first responders to quickly and effectively address life-threatening situations, making it the foundational approach in CPR protocols.