Final answer:
The correct procedure in a cardiac emergency is to perform CPR first, and then use an AED. An AED is designed to be user-friendly and will instruct when to deliver a shock, if necessary. The correct answer to the question is D: No, he needs to do CPR first, then use the AED.
Step-by-step explanation:
The procedure for responding to someone in cardiac arrest includes the use of CPR (cardiopulmonary resuscitation) and an AED (automated external defibrillator). The current guidelines suggest that after confirming the scene is safe and the patient is unresponsive and not breathing normally, one should immediately call for emergency help and then begin CPR.
CPR should be performed first to provide blood flow to the heart and brain, which is crucial in a cardiac emergency. After performing CPR, if an AED is available, it should be used as soon as possible. An AED is designed to automatically diagnose the cardiac rhythm and deliver a shock if necessary. It's meant to be user-friendly for laypersons in public settings as well as professionals.
Once the AED is ready, one should follow the voice prompts given by the device, which will guide the user through the process. Importantly, the AED should not be used multiple times before starting CPR unless the device instructs to do so after analyzing the heart rhythm.
In this scenario, the correct answer is D. No, he needs to do CPR first, then use the AED..