Potential errors in the application of mixture theory to multifrequency bioelectrical impedance analysis.
Potential errors in the application of mixture theory to the analysis of multiple-frequency bioelectrical impedance data for the determination of body fluid volumes are assessed. Potential sources of error include: conductive length; tissue fluid resistivity; body density; weight and technical errors of measurement. Inclusion of inaccurate estimates of body density and weight introduce errors of typically < +/- 3% but incorrect assumptions regarding conductive length or fluid resistivities may each incur errors of up to 20%.
Ward
L C
LC
Department of Biochemistry, University of Queensland, Brisbane, Australia. ward@florey.biosci.uq.edu.au
Elia
M
M
Cornish
B H
BH
D000328:Adult; D000465:Algorithms; D001823:Body Composition; D001827:Body Height; D001835:Body Weight; D003627:Data Interpretation, Statistical; D004553:Electric Conductivity; D017097:Electric Impedance; D006801:Humans; D008297:Male; D008954:Models, Biological