Final answer:
When an AED is available following an adult's collapse, the immediate action is to expose their chest and dry it off if wet, before attaching the AED's electrode pads. CPR is also generally recommended before using an AED, but the AED's instructions should be followed promptly as it guides rescuers through the process.
Step-by-step explanation:
If an AED is immediately available following an adult's collapse, you should expose the person's chest and dry it off if needed before attaching the electrodes. AEDs, or automated external defibrillators, are portable electronic devices found in many public places that deliver a large charge to correct abnormal heart rhythms, such as ventricular fibrillation. These devices provide verbal instructions and are designed to be used by anyone, even those without medical training. The aim is to use the AED to administer a shock that can terminate the arrhythmia and allow the body's natural pacemaker to resume its normal rhythm.
It is also encouraged to perform CPR in many cases before using the AED, as it can help sustain blood flow to the heart and brain until the rhythm can be corrected using the defibrillator. However, the immediate attachment of the AED for analysis of the heart's rhythm is essential, and the unit will advise if a shock is necessary. Remember, if two rescuers are present, one can perform CPR while the other prepares the AED.