What is the preliminary step before delivering a shock with an AED?

Before delivering a shock with an AED, the critical preliminary step is ensuring that no one is touching the patient. This is essential for the safety of both the patient and those assisting in the resuscitation. If someone is in contact with the patient at the moment the AED delivers a shock, they could also receive a potentially harmful electrical jolt. Therefore, having a clear verbal command and visual confirmation that everyone is standing clear is paramount for a safe and effective shock delivery.

Other aspects, such as connecting the AED pads or checking for a pulse, are important but occur after ensuring safety. Calling for advanced medical support is essential in the overall resuscitation process, but it doesn't directly impact the immediate action of delivering a shock. Thus, focusing on safety first is crucial in the protocol for using an AED effectively.