What is the most common reason for an error occurring while using an AED?

The most common reason for an error occurring while using an AED is often attributed to battery failure, which can frequently stem from operator error. AEDs are designed to be user-friendly, but improper handling or failure to regularly check and replace the batteries can lead to device malfunction when it is needed most. Operators may mistakenly assume the AED is powered when it is not or might overlook the importance of maintaining the device, including ensuring the battery is charged and functional.

While other factors like the microchip malfunction or misinterpretation of the patient's cardiac rhythm can lead to issues, they are less common compared to the straightforward issue of battery maintenance. Excessive movement during the analyze phase can affect the readings, but this typically occurs after the AED is powered on and ready for use, whereas battery failure can prevent the AED from operating at all, making it a more prevalent issue in practice.