Emergency First Aid Training - Resuscitation with a Defibrillator
April 13, 2017

What Are the Key AED Safety Considerations in an Emergency?

Automated External Defibrillators (AEDs) are life-saving devices used in cases of sudden cardiac arrest.

While AEDs are designed to be safe and easy to use, understanding key safety considerations is essential for first aiders and workplace responders.

Training in courses such as HLTAID009 CPR and HLTAID010 Provide Basic Emergency Life Support helps ensure safe and confident use of defibrillators in real emergencies.

Is It Safe to Use an AED on a Wet or Metal Surface?

Will Water or Metal Affect AED Safety?

Recent evidence shows that if:

  • The patient’s chest is dry
  • AED pads are correctly attached

the risk of electrical shock to the rescuer is extremely low.

AEDs are designed to deliver electricity directly between the pads on the chest, not to “earth” through the surrounding environment like household electricity.

However, as an extra precaution, always ensure:

  • No one is touching the patient during shock delivery

Do not delay defibrillation due to the patient being on a wet surface or metal floor if the chest itself is dry.

What Should You Do About Medication Patches During Defibrillation?

Can Patches Interfere With AED Use?

Yes.

Some patients may have medication patches on their chest, including:

  • Nicotine patches
  • Glyceryl trinitrate (GTN) patches

These should be removed before applying AED pads.

Certain patches may ignite or interfere with electrical conduction during defibrillation.

Can AEDs Be Used in Flammable Environments?

Are There Risks of Sparks From an AED?

AEDs can produce a small electrical discharge when delivering a shock.

Because of this, they should NOT be used in:

  • Petrol fumes
  • Highly flammable environments
  • Areas with explosive gases

Scene safety must always be confirmed before defibrillation.

How Should Jewellery Be Managed During AED Use?

Does Jewellery Affect Defibrillation?

Yes, it can.

AED pads should never be placed directly over:

  • Necklaces
  • Metal jewellery
  • Conductive objects on the chest

This can:

  • Interfere with shock delivery
  • Cause skin burns

Pierced jewellery generally does not need to be removed unless it interferes with pad placement.

What About Pacemakers and Implanted Defibrillators?

Can You Use an AED on Someone With a Pacemaker?

Yes, but with caution.

Some patients may have implanted devices such as:

  • Pacemakers
  • Internal defibrillators

These are often located just below the left collarbone.

When applying AED pads:

  • Avoid placing pads directly over implanted devices
  • Adjust pad placement slightly if needed

This ensures effective shock delivery without damaging the device.

Why Must the Patient Be Still During AED Analysis?

Can Movement Affect AED Accuracy?

Yes.

AEDs analyse heart rhythms and require the patient to be completely still.

Do not use an AED while:

  • The patient is moving excessively or “fitting”
  • There is vibration from machinery
  • The environment is unstable (e.g., moving vehicle)

Movement can interfere with rhythm analysis and delay shock delivery.

Why Should AED Use Never Be Delayed?

Is Early Defibrillation Important?

Yes — early defibrillation is one of the most critical factors in survival from cardiac arrest.

AEDs are designed to be used immediately once available.

Delays should only occur for:

  • Confirming scene safety
  • Ensuring pads are correctly placed
  • Removing obvious hazards like medication patches

What Is the Key Principle of AED Safety?

What Should First Aiders Always Remember?

The key principle is simple:

Use the AED early, safely, and without unnecessary delay.

AEDs are designed for public use and provide clear voice instructions to guide responders step-by-step.

Why Is AED Training Important?

Should You Learn How to Use an AED?

Yes.

Formal training through courses such as:

  • HLTAID009 CPR
  • HLTAID010 Basic Emergency Life Support

ensures responders understand:

  • Safe pad placement
  • Shock delivery procedure
  • Scene safety assessment
  • Emergency response flow

Final Reminder

AEDs are safe, effective, and designed to save lives when used correctly.

Understanding safety considerations ensures first aiders can act confidently and effectively in a cardiac emergency.