What is the purpose of using an AED?

The purpose of using an Automated External Defibrillator (AED) is to analyze the heart's rhythm and deliver electric shocks if necessary. When a person experiences a sudden cardiac arrest, the heart may go into an abnormal rhythm that can lead to ineffective pumping of blood. The AED is designed to assess whether this rhythm is one that can be corrected with a shock, such as ventricular fibrillation or pulseless ventricular tachycardia.

If the AED detects a shockable rhythm, it will prompt the responder to deliver a shock, which can help restore a normal rhythm and potentially save the person's life. This function of rhythm analysis and shock delivery is crucial in emergency situations, as timely defibrillation can greatly increase the chances of survival.

The other options do not represent the function of an AED. While providing oxygen, chest compressions, and preventing airway obstruction are important elements of CPR and first aid, they do not pertain to the specific role of the AED in cardiac emergencies.