How to Use an AED on an Infant: Updated 2025 UK Resuscitation Guidelines

Although infants rarely experience a shockable rhythm, the use of an AED can still be lifesaving when needed. High-quality CPR remains the most important intervention, but if an AED is available, it should be used without hesitation or delay.

Key Steps for Using an AED on an Infant

1. Call 999 immediately.
   As soon as you recognise that the infant is not breathing, call 999. Ask someone nearby to fetch an AED if one is available.
2. Begin CPR straight away.
   Do not wait for the AED to arrive. Start chest compressions and rescue breaths immediately.
3. Keep CPR going while preparing the AED.
   When the AED arrives, switch it on. Continue compressions and breaths while the pads are being prepared. Avoid unnecessary pauses.
4. Apply the AED pads.
   If paediatric pads are available, use them. If not, adult pads are still safe to use—do not delay treatment.
5. Pad placement (2025 update).
   Place:
   • One pad on the front of the chest, slightly to the left side
   • One pad on the back, between the shoulder blades
   This ensures the heart is positioned “between” the pads for effective shock delivery.
6. Follow the AED prompts.
   The device will analyse the rhythm. Ensure no one touches the infant during analysis or when a shock is delivered.
7. Resume CPR immediately after any shock.
   Perform CPR for two minutes before the AED re-analyses. Continue until help arrives or the infant begins to show signs of life.

Why Rapid Action Matters

In an infant cardiac arrest, every second is critical. Quick CPR, early AED use, and following the device prompts give the best chance of survival.

Important 2025 Guideline Updates

• AED use on infants is now explicitly supported in the 2025 UK Resuscitation Council updates.
• Pad position has been adjusted: many AED pads still show a central chest placement on their diagrams, but current guidance requires the front pad to be positioned slightly left of centre.
• Some AEDs may not reference infant use, but they are still safe to use on infants when required.

With confident, rapid action—CPR started immediately, AED pads applied correctly, and voice prompts followed—you can make a lifesaving difference.