Friday, June 27, 2008

Cool Technology Commentary - RFID Safety

On Wednesday, JAMA published an article about the risks of active and passive RFID to other hospital equipment.

The Associated Press and ABC News issued major stories about it.

Although the study focused on RFID tags, the issue is more generic. Electronic Magnetic Interference (EMI) is generated by many devices including cell phones, laptops, and microwave ovens. Such devices emit RF energy which may interfere with the operation of sensitive electronic components used in medical equipment. The interference may be frequency related (signal jamming) or cause the device to fail because a chip or wire is exposed to too much energy from an emitting device. The very best defense is to have adequate shielding for medical equipment. It's inconceivable that hospitals can keep patient care areas free of RF emitters. Thus, it is important for hospital Clinical Engineering departments to be constantly vigilant in identifying potentially unsafe devices.

CareGroup addressed this issue 7 years ago with a global EMI guideline and summary, which we developed by inviting 100 industry experts and the FDA to a consensus conference in Boston.

Of course, we continue to test new EMI emitting technologies as they are introduced into the hospital. Our RFID use is well documented. The Active RFID tags deployed at BIDMC have been tested by Clinical Engineering for interference with other hospital devices and do not cause a problem.

In addition to thinking about the risks of new technologies, we should also consider the benefits. Remember that every activity in life has a risk (which I measure in Morts). If the risk of patient harm is 1 in a million, but the benefit of using the technology prevents harm to every patient, the hospital needs to carefully assess the balance. In the case of RFID, we have deployed the technology with significant testing and adherence to our guidelines, mitigating the risks and maximizing the benefits.

4 comments:

Michael J. Wilson said...

Hi John

I am MSc. ehealth student at McMaster. In our biomedical informatics class we were asked to study ehealth blogs, when I came across geekdoctor. I was a bit surprised to see your blog because I have been studying the literature on RFID in hospitals for the past 3 months for a course project. I am writing about the ethics, privacy and security of RFID. Interesting to read your response to the JAMA article. Not sure myself why a high impact journal like that would want to jam the airwaves with information most everybody is refuting. I enjoyed reading some postings in your blog.

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