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Automated external defibrillators (AEDs)

What is an automated external defibrillator (AED)?

An automated external defibrillator (AED) is a small portable electronic device that analyzes the heart's rhythm and tells the user to deliver a defibrillation shock only if it is needed.

Unlike defibrillators used by health care professionals, AEDs are designed to allow trained non-professionals to respond to medical emergencies like sudden cardiac arrest. The devices are programmed to analyze the heart's electrical function. Voice prompts and screen displays explain how to attach electrodes onto the victim, then instruct users to stay clear while the AED analyzes his or her heart rhythm.

How safe are AEDs?

Automated external defibrillators (AEDs) are very accurate and will not shock someone who is not in cardiac arrest.

When used properly and with appropriate precautions, AEDs pose no risk to the rescuer or the patient.

Who can use an AED?

Automated external defibrillators (AEDs) can be used by anyone who has completed a short, usually four-hour training that covers both AED use and cardiopulmonary resuscitation (CPR).

Police officers, firefighters, security officers, athletic trainers, flight attendants, lifeguards -- people who are often first on the scene when sudden cardiac arrest occurs -- often receive AED training.

What is the legal liability of using an AED?

Most experts agree that the benefits of prompt automated external defibrillator (AED) use outweigh the liability risks for three reasons:

• If sudden cardiac arrest is left untreated, the victim will die.
• AEDs on the market today are difficult to misuse.
• AED use is becoming a legal standard of care. Failure to have access to an AED may cause greater legal exposure than the potential misuse of the device.

Good Samaritan laws in all 50 states offer immunity for AED users who have completed the required training. For example, Minnesota State Statute 604A.01, subdivision 2, states that the non-professional user is exempt from civil liability.

The United States Food and Drug Administration requires AED labeling to indicate that the device should only be used by trained individuals.

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Allina Medical Transportation
167 Grand Avenue
St. Paul, MN 55102
651-228-8470

First published: 05/06/2004
Last updated: 02/19/2007

Reviewed by: Charles Lick, MD, medical director, Allina Medical Transportation