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Mayo Clinic researchers find PDAs okay with pacemakers
With the dynamic evolution of wireless technology, Mayo Clinic researchers have been concerned about the potential
effects of electromagnetic interference on heart pacemakers and implantable cardioverter-defibrillators. In the current issue
of Mayo Clinic Proceedings, researchers report they did not detect interference from personal digital assistants (PDAs).
The findings are important because wireless communication has grown and advanced quickly. Hospitals and clinics have
installed wireless local area networks (WLAN), which enable users to establish a wireless network connection with computers
or other data devices throughout a building or multiple buildings that have the necessary data infrastructure in place. The
wireless capabilities allow physicians and other health care professionals immediate access to a variety of information when
evaluating and treating patients. Patients also are carrying wireless devices and need to understand if there would be any
adverse reactions to implantable cardiac devices.
David Hayes, M.D., a Mayo Clinic physician and lead researcher in the study, says researchers did not expect to find
interference based on their past experiences with other devices they have tested.
"When new devices are used near a patient with a life-sustaining implantable device, there is a potential of electromagnetic
interference, and assessment of potential interactions is critical," says Dr. Hayes. "Despite the increasing sophistication
of sensing circuitry in contemporary pacemakers and implantable cardioverter-defibrillators, these devices are still
susceptible to electromagnetic interference and physicians need good data telling them which ones are or aren't. And as
technology advances, we'll need continual testing to stay up to date."
In the Mayo Clinic study, testing was conducted between March 6 and July 30, 2003, using devices outside of the body. The
cardiac devices were exposed to an HP Compaq iPAQ Pocket PC personal digital assistant fitted with a Cisco Aironet WLAN card.
The testing of devices that had not been implanted was done for clinical safety purposes, says Dr. Hayes. However, he says
testing of devices inside a patient's body would be easy to design and conduct.
"Such testing is necessary to provide definitive answers for individual patients," says Dr. Hayes. "For example, a patient
who is pacemaker dependent may ask whether a specific WLAN device can be used and/or carried safely in a coat pocket when
turned on near the patient's implanted device."
Dr. Hayes suggests that a template for further study could be from the cellular telephone study he led which was published in
1997 in the New England Journal of Medicine. That study tested numerous implanted devices with the most commonly available
cellular telephones and with cellular telephones not yet commercially available but representing a different "frequency" or
design. Testing for the PDA study followed methods provided in the American National Standards Institute/Association for the
Advancement of Medical Instrumentation Pacemaker Committee protocol.
"As other wide local area network products are developed and made commercially available, additional testing will be needed
to ensure clinical safety," Dr. Hayes says.
Researchers involved in the study were Jeffrey Tri, Jane Trusty and Dr. Hayes.
A peer-review journal, Mayo Clinic Proceedings publishes original articles and reviews dealing with clinical and laboratory
medicine, clinical research, basic science research and clinical epidemiology. Mayo Clinic Proceedings is published monthly
by the Mayo Foundation for Medical Education and Research as part of its commitment to the medical education of physicians.
The journal has been published for more than 75 years and has a circulation of 130,000 nationally and internationally. Copies
of the articles are available online at http://www.mayoclinicproceedings.com.
To obtain the latest news releases from Mayo Clinic, go to http://www.mayoclinic.org/news. MayoClinic.com (http://www.mayoclinic.com) is available as a resource for your health stories.
Contact: John Murphy
newsbureau@mayo.edu
507-284-5005 (days)
507-284-2511 (evenings)
Mayo Clinic
Clinica Mayo cercetatorii gãsi bine PDA-uri cu pacemaker - Mayo Clinic researchers find PDAs okay with pacemakers - articole medicale engleza - startsanatate