Evaluation of a foot-to-foot impedance meter measuring extracellular fluid volume in addition to fat-free mass and fat tissue mass

Jaffrin, Michel Y.; Kieffer, Roland; Moreno, Marie-Valérie

doi:10.1016/j.nut.2004.11.016

Cited by 21 publications

(13 citation statements)

References 14 publications

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“…Both were not significantly different from V ex with respective p values of 0.545 and 0.096. When using Sergi's equation (9) and R 50b , ECW volumes V es were, respectively, 18.7 L for men (p/V ex = 0.689) and 15.14 L for women, an overestimation of 1.24 L relatively to the Xitron (p = 8 9 10 -7 ). As with the first and second groups, Hannan's method with R 50b overestimated ECW by 1.8 L in men and by 2.4 L in women.…”

Section: Comparison Of Ecw Volumes In the Third Group By Bodyexplorermentioning

confidence: 96%

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Extracellular volume measurements using bioimpedance spectroscopy-Hanai method and wrist–ankle resistance at 50 kHz

Jaffrin

Morel

2008

Med Biol Eng Comput

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A method for extrapolating the extracellular water (ECW) resistance from wrist-ankle resistance at 50 kHz (R (50)) is proposed in this paper, in order to enable 50 kHz impedancemeters to use the BIS-Hanai equation for determination of ECW. Values of R (50) and the ECW resistance extrapolated at zero frequency R (e) were measured in a first group of 57 healthy volunteers, using a Xitron 4200 multifrequency impedancemeter and mean values (b) of the ratio R (50)/R (e) in men and women were used to determine individual values of R (e50), the ECW resistance extrapolated from R (50), which were substituted to R (e) in the BIS-Hanai equation. For validation, the method was compared against ECW measured with the Xitron (V (ex)) in a second group of 31 healthy volunteers, using values of b of first group. Values of R (e50) in this second group were found to be not significantly different from corresponding values of R (e) with p-values of Student test of 0.346 for men and 0.300 for women. ECW volumes (V (e50)) calculated from R (e50) were also found not significantly different from those of the Xitron with Student paired test p values of 0.277 in men and 0.393 in women. Our method gave a better agreement with V (ex) than two bioimpedance analysis methods from the literature, especially in women. It was also tested on a 50 kHz single frequency impedancemeter (BodyExplorer, Juwell Medical) on a third group of 21 subjects and gave ECW volumes not significantly from those of the Xitron with p = 0.531 for men and 0.096 for women.

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Section: Comparison Of Ecw Volumes In the Third Group By Bodyexplorermentioning

confidence: 96%

“…In a recent paper [9], we have used Eq. (4) to calculate ECW volumes from the provided by a single frequency foot-to-foot impedancemeter which featured a square signal at 114 kHz, using the low frequency resistance R lf extracted from the top of the square signal.…”

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confidence: 99%

Extracellular volume measurements using bioimpedance spectroscopy-Hanai method and wrist–ankle resistance at 50 kHz

Jaffrin

Morel

2008

Med Biol Eng Comput

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“…Height (H) was measured to within 0.5 cm using a wall-mounted stadiometer. Weight, fat-free mass (FFM T ) were measured with the BodyVision FFI, which had been previously tested against DXA measurements [2,8]. A whole body DXA scan was performed right after impedance measurements using a Hologic Delphi W8/N71224 system with 40 and 100 kev energy levels (Hologic Inc., Waltham Ma, USA) equipped with a Hologic 11.2 whole body software.…”

Section: Subjects and Measurement Protocolmentioning

confidence: 99%

“…Thus, even a relatively large variation in trunk resistance due to a different morphology will have a small effect on the hand-tofoot resistance. Whole body resistance is influenced by body position, and will be lower in standing than in supine position, due to the effect of gravity on body fluids which accumulate in the legs and lower their resistance [8,13].…”

Section: Introductionmentioning

confidence: 99%

Comparison of body fat-free masses calculated from hand-to-foot and foot-to-foot resistances with DXA measurements

Bousbiat

Jaffrin

Dongmo

2011

Med Biol Eng Comput

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This article compares the determination of body fat-free-mass (FFM) by impedance, using either hand-to-foot resistance (R₁₃) or foot-to-foot one (R₃₄) from comparison with dual X-ray absorptiometry (DXA) measurements in a normal population. The first goal was to see if the foot-to-foot resistance used in body fat analysers provides less accurate information for body FFM than the hand-to-foot one used by medical impedance-meters. Another goal was to compare the prediction accuracy of six different regression equations of FFM for each sex and for each resistance relatively to DXA. The impedancemeter used in this study was a Tefal prototype with 4 plantar electrodes and 4 additional electrodes for the hands and providing hand-to-foot and foot-to-foot resistances. Coefficients of these correlations were determined by comparison with FFM measured by DXA in a 1st cohort of 170 healthy adults. For an independent validation, these equations were tested in a 2nd cohort of 86 adults who underwent the same impedance and DXA protocols, using Student's paired t-tests. The accuracy of FFM prediction increased generally with the number of physiologic parameters included in the regression, but none of our equations gave FFM predictions significantly different from DXA. FFM calculated from the foot-to-foot resistance were closer to DXA values than those calculated from hand-to-foot resistance, as their average P-value of comparison with DXA was higher at 0.695 against 0.387 for R₁₃.

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“…Among bioimpedance applications, noninvasive estimate of body fluids (extracellular fluid -ECF, intracellular fluid -ICF, and total body water -TBW) has been used in monitoring patients and athletes. Particularly, the ratio between ECF and ICF has been suggested as an effective index for controlling health status [2]. These estimates are used independently and associated with others variables to follow-up patients with HIV [3], in the assessment of hydration status in patients undergoing hemodialysis [4], controlling the health status of patients affected by hyperthyroidism [5], dengue fever [6], in studies of hydration during cellular aging [7], and for monitoring levels of obesity and nutrition [8], among others.…”

Section: Introductionmentioning

confidence: 99%

Effects of Intense Physical Activity with Free Water Replacement on Bioimpedance Parameters and Body Fluid Estimates

Neves

Ulbricht

Krueger

et al. 2012

J. Phys.: Conf. Ser.

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Evaluation of a foot-to-foot impedance meter measuring extracellular fluid volume in addition to fat-free mass and fat tissue mass

Cited by 21 publications

References 14 publications

Extracellular volume measurements using bioimpedance spectroscopy-Hanai method and wrist–ankle resistance at 50 kHz

Extracellular volume measurements using bioimpedance spectroscopy-Hanai method and wrist–ankle resistance at 50 kHz

Comparison of body fat-free masses calculated from hand-to-foot and foot-to-foot resistances with DXA measurements

Effects of Intense Physical Activity with Free Water Replacement on Bioimpedance Parameters and Body Fluid Estimates

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