Understanding AEDs
Shock Levels: Fixed Energy Vs Escalating Energy As mentioned previously public access defibrillators deliver a biphasic shock, however, AEDs deliver this life saving shock differently by using different energy levels.
Some have fixed energy levels meaning the first and subsequent shocks will be delivered at the same energy level, typically 150 joules of energy. Others deliver escalating energy levels, the first shock may be delivered at 150 joules and any subsequent shocks will be delivered at higher energy levels, typically 200 joules for the second shock and 300 joules for the third and remaining shocks.
Battery Life Battery life is a very important consideration when purchasing an AED. Whichever AED you choose to buy, you can expect to replace the battery at least once during its life, even if the AED is never used. This could have a significant impact on the total cost of AED ownership over a 5 – 7 year period.
Rechargeable batteries Rechargeable batteries are available to a few, certainly not all of the AEDs. Typically these AEDs are more professional units with additional features such as ECG screens and manual override capability.
These units would be used on a regular basis by healthcare professionals and so would require rechargeable batteries to ensure full battery levels and to help reduce the ongoing cost of ownership.
“You can expect to replace the battery in an AED at least ONCE during its life, even if it is never used”
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