6 Factors That Determine When to Replace Your AED

Automated external defibrillators (AEDs) have become essential for saving lives in sudden cardiac arrest (SCA) cases. These devices deliver an electric shock to the heart to restore its normal rhythm. However, like any other medical device, AEDs have a limited lifespan and require periodic maintenance and replacement. In this article, we will explore the factors determining when to replace your AED.

Lifespan of AEDs

The average lifespan of an AED is between five and seven years. The lifespan of an AED is affected by various factors such as usage, storage conditions, and maintenance. AEDs subjected to frequent use or harsh environmental conditions may have a shorter lifespan than those used less frequently and properly maintained.

Manufacturer Recommendations

Manufacturers of AEDs provide guidelines for the replacement of their devices. These recommendations are based on the expected lifespan of the device and the estimated frequency of use. It is important to follow the manufacturer's recommendations to ensure your AED is always in good working condition.

Maintenance and Testing

Regular maintenance and testing of your AED are essential to ensure it functions correctly. AEDs should be inspected and tested at least once a month to ensure the battery is fully charged, the pads are not expired, and the device is functioning correctly. If any issues are detected during the testing process, the AED should be taken out of service immediately and replaced or repaired.

Frequency of Use

The frequency of use of your AED is a significant factor in determining when it is time to replace it. AEDs that are used frequently may have a shorter lifespan than those that are used less frequently. If your AED has been used to treat multiple SCA events, consider replacing it.

Changes in Technology

Advances in technology can make older AEDs obsolete. Newer models may have features that make them more effective or easier to use. It is essential to stay up to date with the latest advancements in AED technology to ensure that you use the best device for your needs.

Changes in Regulations

Regulations regarding AEDs may change over time. It is essential to stay informed about any changes in regulations that may affect the use or maintenance of your AED. Failure to comply with regulations can result in fines or legal liabilities.

Replacing an AED

Replacing an AED is an important task that needs to be carried out regularly. An AED might lose effectiveness over time due to wear and tear or other factors. Therefore, replacing an AED as per the manufacturer's recommendations or if it shows any signs of malfunctioning is important. This ensures that the AED is ready to use in an emergency and can help save a life. Replacing an AED is a simple process and involves checking the expiry date of the device, inspecting it for any damage, and replacing the batteries and electrode pads if required.


Automated external defibrillators are a critical tool for saving lives in cases of sudden cardiac arrest. However, like any other medical device, they have a limited lifespan and require periodic maintenance and replacement. By staying informed and following the manufacturer's recommendations, you can ensure that your AED is always in good working condition and ready to save a life.

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