Defibrillator Blamed in Deaths

Beth Janicek
Attorney
(866) 735-1102 Ext 395
Posted by Beth JanicekApril 08, 2009 10:32 AM

Zoll Medical Corp. said recently that some of its defibrillators have defective batteries and software. The AED Plus external defibrillator, which is used in public settings such as airports, schools, and health clubs, failed to deliver a shock to two patients, leading to their deaths. The two deaths are among four reports received by Zoll in which a shock failed to be delivered to a patient.

According to Bloomberg.com, Zoll began asking customers on February 12 to download software which can be used to detect a potential defect in their defibrillator’s battery. More than 180,000 defibrillators may be affected, with the greatest risk attributable to 80,000 units that have been installed for more than 3 years. The defects include batteries that do not work and self testing software that fails to detect malfunctioning batteries.

The free software updates designed to check the AED plus defibrillator can be downloaded at this website.

Every year between 250,000 and 450,000 Americans experience a sudden heart stoppage or cardiac arrest. Cardiac arrest is caused by rhythm disturbance or silent coronary artery disease. 95 percent of people who suffer a cardiac arrest die, but defibrillators are designed to deliver a shock to the person and thereby restore normal heart rhythm. Having quick access to a working defibrillator can be the difference between life and death. Hopefully, Zoll is doing everything they can to inform the public of this issue so that no more lives are lost.

9 Comments

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Jeremy
Posted by Jeremy
April 08, 2009 11:56 AM

It sounds like they need to recall all of these devices....or have their service reps go inspect them all....

Jon
Posted by Jon
April 08, 2009 1:03 PM

Yes, these should be recalled. Zoll does not have a field service organization.

Kevin
Posted by Kevin
April 09, 2009 12:19 AM

Yes - did you know that these highly critical medical devices, designed to save lives, use off-the-shelf batteries you can buy at a local grocery store? How can that be? SEems to be no control over how good those batteries are.

Elliot Fisch
Posted by Elliot Fisch
April 09, 2009 8:08 AM

Zoll's "off-the-shelf" batteries are the SAME batteries used by AED manufacturers Philips, Defibtech and Welch-Allyn. Zoll chooses to make the batteries conveniently replaceable by the consumer from any retail store at a very low cost. The other manufacturers use the same battery but package them in a "battery pack" that can only be bought from the manufacturer at a much higher price.

In addition, the Zoll battery configuration has 10 batteries, but the unit only uses 5 thereby having a battery redundancy no other AED has.

The solution in this situation is a simple 5 minute process that can be done on-site by the AED owner. That's less time and effort than it would take them to pack the unit up and ship it back.

All AED manufacturers have had some kind of "recall" or "Field Corrective Action". The occasional problems, while tragic in their individual cases, still do not come close in magnitude to the benefit they have provided in saving hundreds (if not thousands) from sudden cardiac death over the years. Just ask the survivors and their families.

William
Posted by William
April 09, 2009 10:41 AM

Quote from Elliot Fisch:

"Zoll's 'off-the-shelf' batteries are the SAME batteries used by AED manufacturers Philips, Defibtech and Welch-Allyn. Zoll chooses to make the batteries conveniently replaceable by the consumer from any retail store at a very low cost. The other manufacturers use the same battery but package them in a "battery pack" that can only be bought from the manufacturer at a much higher price."

A significant difference and value is that other AED manufacturers have warranties for their proprietary battery packs ranging from 1-5 years (depending on the AED). The camera batteries used in Zoll AEDs have <1 year warranties from the battery manufacturer (i.e. Duracell).

Elliot Fisch
Posted by Elliot Fisch
April 09, 2009 10:57 AM

Per Zoll's technical specifications:
Battery Capacity: Typical new (20°C) = 5 years (300
shocks) or 13 hours continuous monitoring. End of life designated by Red X (typical remaining shocks = 100, 5 hours continuous monitoring).

William
Posted by William
April 09, 2009 11:20 AM

Per Zoll's Indemnification Agreement:

This indemnification does not extend to or cover...the failure of any batteries...

Per Zoll's US Warranty:

This warranty does not cover items subject to normal wear and burnout during use, including but not limited to lamps, fuses, batteries, patient cables and accessories.

Wayne ParsonsInjuryBoard Attorney Member
Posted by Wayne Parsons
April 20, 2009 3:45 AM

Thanks for this article. I need to check the device in my office. These are life and death devices. Thanks Beth.

John
Posted by John
May 06, 2009 7:06 PM

Looks like the ZOLL sales rep is trying hard to save face on here.

Comments for this article are closed.

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