Everything You Need to Know About Defibrillator PadsMay 21st 2025

Your Guide to Defibrillator Pads

Defibrillator pads are a vital part of any Automated External Defibrillator (AED) setup, yet they’re often overlooked until an emergency strikes. Whether you manage a workplace, a school, or a community space, understanding how defibrillator pads work, when to replace them and how to use them correctly could be the difference between life and death.

In this guide, we explain what defibrillator pads are, how they’re used, the differences between adult and paediatric pads, and why using the right ones matters more than you might think.

What Are Defibrillator Pads?

Defibrillator pads, also known as AED electrode pads, are the adhesive components that connect the patient to the AED device. They’re pre-gelled and designed to stick to the chest to:

• Detect and monitor the heart’s electrical rhythm

• Allow the AED to assess whether a shock is necessary

• Safely deliver a shock if needed

When someone experiences sudden cardiac arrest (SCA), the AED analyses the heart’s rhythm through the pads. If a shockable rhythm is detected, the device will prompt the responder to stand clear and then deliver an electric shock – restarting or stabilising the heart.

Without working, well-placed pads, the AED cannot do its job.

Why Proper Pad Placement Matters

For defibrillator pads to work effectively, they must have firm, uninterrupted contact with the skin. This ensures the AED receives an accurate reading of the heart’s rhythm and can deliver a shock through the heart muscle.

To achieve this:

• Clothing must be removed from the upper body

• Sweat, moisture, or water should be dried off

• Hair should be shaved if it’s excessive in the pad areas

Most AED prep kits include scissors, a razor, and a towel for this exact reason. Hair can lift the pad, creating a gap that interferes with current delivery or monitoring — potentially preventing the shock.

Where Do You Place AED Pads?

Pad placement depends on the age and size of the patient.

Defibrillator Pad placement for adults

Adult Pad Placement (Age 8+, over 25kg):

• Pad 1: Upper right chest, just below the collarbone

• Pad 2: Lower left side, below the armpit

This positioning allows the shock to pass directly through the heart.

Paediatric/Child Pad Placement (Under 8 years old or <25kg):

• Pad 1: Centre of the chest (between nipples)

• Pad 2: Middle of the back, directly behind the chest pad

This anterior-posterior placement prevents pads from overlapping on smaller torsos.

Only use adult pads on a child if child pads are unavailable and the AED allows it. Always follow manufacturer guidance.

Adult vs. Paediatric Defibrillator Pads

AED pads come in two main types: adult and paediatric.

Adult Pads:

• Standard default for most AEDs

• Delivers full shock energy

• Used for anyone over 8 years old or heavier than 25kg

Paediatric Pads:

• Designed for smaller bodies

• Reduce the energy output of the shock

• Ensure safe delivery for infants and young children

Some AED models (like the Zoll AED 3) have a child mode button or switch that adjusts shock strength without needing separate pads — but most require dedicated paediatric electrodes.

🟢 Always keep the correct pads in stock and clearly labelled in your defibrillator kit.

Why You Should Use Manufacturer-Approved Pads Only

It can be tempting to look for cheaper alternatives or generic pads – especially for large organisations managing multiple devices. But using non-manufacturer-approved pads can cause serious issues:

• Incompatibility with the AED’s detection and feedback system

• Incorrect shock levels or failed delivery

• Potential voiding of warranties or legal liability

AEDs are calibrated for use with specific pads. Even if another brand’s pads “fit,” they may not perform safely or effectively. That’s why it’s essential to use only approved pads for your specific AED model.

🛠️ Examples include:

• Zoll CPR-D-padz

• Philips HeartStart SMART Pads

• Powerheart G5 Adult Electrodes

• iPAD SP1 Paediatric Electrodes

🔗 Browse all defibrillator pads by brand and model here

How Long Do AED Pads Last?

Defibrillator pads are single-use and have an expiry date, typically 2 to 5 years from manufacture. After this, the conductive gel can dry out, reducing effectiveness or causing skin burns.

To stay ready:

• Set a calendar reminder to check expiry dates every 6 months

• Always replace used pads immediately

• Consider buying a spare set for high-traffic environments

We stock a wide range of AED pads with long shelf lives, ready for immediate dispatch.

Additional Things to Know About AED Pads

✅ AED Training Pads

Training pads are separate from live units and do not deliver a shock. They’re reusable and compatible with training devices – ideal for first aid sessions, schools, and simulations.

✅ Pads After Use

Once a set of pads has been used in a rescue attempt, they must be replaced, even if no shock was delivered. AEDs log every event, and proper pad function must be guaranteed for the next emergency.

Summary: Why Defibrillator Pads Matter

Defibrillator pads are the critical connection between an AED and the person who needs it. To ensure your AED works when it matters most:

• Always use the correct pads for your specific device

• Understand where and how to place them

• Replace expired or used pads immediately

• Store adult and child pads together if your AED is in a public space

• Never substitute with unofficial brands

💬 Don’t See the Pads You Need?

We stock a wide range of defibrillator pads from all major manufacturers. If you’re unsure which set is right for your device – or you don’t see it listed – use our live chat or contact us directly. Our team will be happy to help source exactly what you need.

📦 We have plenty of stock available for fast dispatch.
🛒 Shop AED pads now or speak to us for expert advice on keeping your defibrillator ready.