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Multifrequency bioelectrical impedance estimates the distribution of body water

Principle/Accuracy
Author
Cha K, Duglas W. Wilmore et al.
Used Parameters : TBW, ECW, ECW/TBW
Publication Year : 1995
Country : Korea
Journal : Journal of Applied Physiology
Multifrequency bioelectrical impedance analysis was used to estimate the ratio of extracellular water (ECW) to total body water in subjects with end-stage renal disease. The body's resistance was measured at frequencies ranging from 1 kHz to 1 MHz. The impedance index (height2/resistance) determined at low frequency (5 kHz) correlated most closely with ECW (r= 0.886) using sodium bromide dilution as the standard of comparison. In contrast, the ratio of height squared to resistance determined at high frequency (500 kHz) …
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