On whom should an Automated External Defibrillator (AED) be used?

An Automated External Defibrillator (AED) is designed to be used on individuals who are experiencing cardiac arrest, which is characterized by a sudden loss of heart function, leading to an absence of pulse and unresponsiveness. The correct answer emphasizes the importance of using an AED on a person who is at least 8 years old and showing clear symptoms of cardiac arrest.

This is crucial because AEDs are equipped with child and adult settings to adjust the shock delivered based on the size and weight of the victim. While the device can also be used on adults and older children, the threshold of 8 years takes into account both the developmental stage and the greater efficacy of defibrillation in older children, who generally have a more advanced cardiovascular system.

Utilizing the AED on someone clearly exhibiting symptoms of cardiac arrest ensures that it is being used appropriately, maximizing the chances of survival and recovery. This scenario confirms the need for quick action in emergency situations, making awareness and training paramount for all flight attendants.

Other options reflect misunderstandings of AED applicability or limits that are not suitable; namely, AEDs can be used by trained individuals, but the general protocol allows for any person assisting in an emergency to access and use the device on the right individuals.