An Automated External Defibrillator (AED) is designed to be simple and safe to use. The device will guide you through every step with clear voice and visual prompts until emergency services arrive. Knowing how to use a defibrillator can save a life during sudden cardiac arrest.
1. Call 999 or 112 Immediately
If you see someone collapse, call 999 or 112 straight away to contact emergency services -National Ambulance Services (NAS) Ireland. If others are present, point to one person and clearly instruct them to make the call and explain the situation. This avoids confusion and ensures help is on the way as quickly as possible.
2. Check Breathing and Airway
Check if the person is breathing normally.
- If they are breathing, they likely have a pulse.
- If they are not breathing, ensure the airway is clear and begin CPR.
Start with 30 chest compressions followed by 2 rescue breaths, compressing the chest to a depth of 4–5 cm.
3. Locate an AED / Defibrillator
If an AED defibrillator is nearby, ask a bystander to continue CPR while you retrieve and prepare the AED. Continuous CPR is critical and should only stop when the AED is analysing the heart rhythm or delivering a shock.
4. Turn On the AED
Switch on the AED / defibrillator and follow the voice and visual instructions provided by the device.
5. Attach the AED Pads to the Bare Chest
Expose the person’s bare chest (male or female).
Ensure the electrode pads are connected to the AED, then place them on the patients bare chest, one upper right, one lower left, most AED defibrillators clearly indicate correct pad placement to help guide you.
6. Always follow the AED Instructions.
The AED will tell you when to stand clear, when to deliver a shock, and when to resume CPR.
Important: CPR should continue while the AED pads are being applied and should only pause when instructed by the AED.
