When preparing to use an AED, which of the following should be checked first?

When preparing to use an AED, it is crucial to ensure that the area around the victim is safe and that the device can function properly once applied. The correct step involves checking for the presence of body hair on the victim, as excessive hair can prevent the AED pads from adhering properly to the skin, which is essential for delivering a shock effectively. If the pads do not make proper contact, the AED may not be able to analyze the victim's heart rhythm accurately or deliver a necessary shock, which could hinder the chances of saving the victim's life.

While considering safety is always important, making sure that the AED is applied correctly and efficiently is the immediate next step after verifying that the environment is safe. This helps to ensure that you are prepared to provide effective assistance without delay.