AJCN Tufts Nutrition Symposium, Boston Sept 24-26
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American Journal of Clinical Nutrition, Vol 64, 405S-412S, Copyright © 1996 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Overview of bioelectrical impedance analyzers

NM Oldham
Electricity Division, National Institute of Standards and Technology, Gaithersburg, MD Technology Administration, US Department of Commerce 20899, USA. oldham@eeel.nist.gov

Six commercial bioelectrical impedance analyzers were evaluated to determine their accuracy as impedance meters, their sensitivity to contact impedance, and other operating parameters such as maximum current amplitude and test wave-form. Over a range of impedances that simulate human body impedance, analyzer errors varied from < 1% to nearly 20%. Larger errors were observed when the contact impedance was at the limits of the operating range of the analyzer. Body models, sources of error, and several simple tests that the user can perform are also discussed.




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Copyright © 1996 by The American Society for Nutrition