scholarly journals Estimates of body water compartments with use of bioelectrical impedance analysis

2001 ◽  
Vol 73 (4) ◽  
pp. 845-845 ◽  
Author(s):  
Christopher Nunez
Keyword(s):  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Body Water ◽  
Water Compartments

Estimation of body water compartments in cirrhosis by multiple-frequency bioelectrical-impedance analysis

Nutrition ◽  
2001 ◽  
Vol 17 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Megan E Lehnert ◽  
David D Clarke ◽  
John G Gibbons ◽  
Leigh C Ward ◽  
Sue M Golding ◽  
...  
Keyword(s):  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Body Water ◽  
Multiple Frequency ◽  
Water Compartments

Single- and multifrequency models for bioelectrical impedance analysis of body water compartments

1999 ◽  
Vol 87 (3) ◽  
pp. 1087-1096 ◽  
Author(s):  
R. Gudivaka ◽  
D. A. Schoeller ◽  
R. F. Kushner ◽  
M. J. G. Bolt
Keyword(s):  
Total Body Water ◽  
Bioelectrical Impedance Analysis ◽  
Deuterium Oxide ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Ringer Solution ◽  
Body Water ◽  
Single Frequency ◽  
Water Compartments ◽  
Total Body

The 1994 National Institutes of Health Technology Conference on bioelectrical impedance analysis (BIA) did not support the use of BIA under conditions that alter the normal relationship between the extracellular (ECW) and intracellular water (ICW) compartments. To extend applications of BIA to these populations, we investigated the accuracy and precision of seven previously published BIA models for the measurement of change in body water compartmentalization among individuals infused with lactated Ringer solution or administered a diuretic agent. Results were compared with dilution by using deuterium oxide and bromide combined with short-term changes of body weight. BIA, with use of proximal, tetrapolar electrodes, was measured from 5 to 500 kHz, including 50 kHz. Single-frequency, 50-kHz models did not accurately predict change in total body water, but the 50-kHz parallel model did accurately measure changes in ICW. The only model that accurately predicted change in ECW, ICW, and total body water was the 0/∞-kHz parallel (Cole-Cole) multifrequency model. Use of the Hanai correction for mixing was less accurate. We conclude that the multifrequency Cole-Cole model is superior under conditions in which body water compartmentalization is altered from the normal state.

Bioelectrical Impedance Analysis of Water Reduction in Lower-Limb Lymphedema by Lymphaticovenular Anastomosis

2018 ◽  
Vol 35 (04) ◽  
pp. 306-314 ◽  
Author(s):  
Yoshichika Yasunaga ◽  
Daisuke Yanagisawa ◽  
Erika Ohata ◽  
Kiyoshi Matsuo ◽  
Shunsuke Yuzuriha
Keyword(s):  
Lower Limb ◽  
Bioelectrical Impedance Analysis ◽  
Linear Regression Analysis ◽  
Reduction Rate ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Body Water ◽  
Volume Reduction ◽  
Water Volume ◽  
The Mean

Background Although lymphedema is fundamentally abnormal accumulation of excess water in the extracellular space, previous studies have evaluated the efficacy of physiological bypass surgery (lymphaticovenular anastomosis [LVA]) for lymphedema without measuring water volume. This study clarified the water reductive effect of LVA using bioelectrical impedance analysis (BIA). Methods The efficacy of LVA for unilateral lower-limb lymphedema was evaluated using BIA in a retrospective cohort. The water volume of affected and unaffected legs was measured using multifrequency BIA before and after LVA. Preoperative measurements were undertaken after compression therapy for at least 3 months. The follow-up period after LVA was a minimum of 6 months. Results Thirty consecutive patients with unilateral lower-limb lymphedema were enrolled. The mean water volume reduction of the affected leg by LVA (ΔLBW) was 0.86 L (standard deviation [SD]: 0.86, median: 0.65) with a mean number of 3.3 anastomoses (SD: 1.7). The mean reduction rate of edema was 45.1% (SD: 36.3). Multiple linear regression analysis revealed water volume difference between the affected and unaffected legs before LVA (excess LBW) as the strongest predictor of ΔLBW (R 2 = 0.759, p < 0.01; β = 0.500, p < 0.01). Conclusion The LVA reduces the volume of accumulated body water in lower-limb lymphedema. As excess LBW most strongly predicted the amount of water volume reduction by LVA, body water volume measurement by BIA before LVA might identify patients with low excess LBW not expected to benefit from LVA, regardless of apparent differences in limb circumference.

Effect of skin temperature on multifrequency bioelectrical impedance analysis

1996 ◽  
Vol 81 (2) ◽  
pp. 838-845 ◽  
Author(s):  
R. Gudivaka ◽  
D. Schoeller ◽  
R. F. Kushner
Keyword(s):  
Skin Temperature ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Skin Surface ◽  
Body Water ◽  
Heating And Cooling ◽  
Water Compartments ◽  
Multifrequency Bioimpedance ◽  
Measured Impedance ◽  
Total Body

This study assessed the effects of changes in skin temperature on multifrequency bioimpedance analysis (MF-BIA) and on the prediction of body water compartments. Skin temperature (baseline 29.3 +/- 2.1 degrees C) of six healthy adults was raised over 50 min to 35.8 +/- 0.6 degrees C, followed by cooling for 20 min to 26.9 +/- 1.3 degrees C, by using an external heating and cooling blanket. MF-BIA was measured at both distal (conventional) and proximal electrode placements. Both distal and proximal impedance varied inversely with a change in skin temperature across all frequencies (5–500 kHz). The change in proximal impedance per degree centigrade change in skin surface temperature was approximately 60% of distal impedance. The change in measured impedance at 50 kHz erroneously increased predicted total body water (TBW) by 2.6 +/- 0.9 liters (P < 0.001) and underpredicted fat mass by 3.3 +/- 1.3 kg (P < 0.0001). Computer modeling of the MF-BIA data indicated changes in predicted water compartments with temperature modifications; however, the ratio of extracellular water (ECW) to TBW did not significantly change (P < 0.4). This change in impedance was not due to a change in the movement of water of the ECW compartment and thus probably represents a change in cutaneous impedance of the skin. Controlled ambient and skin temperatures should be included in the standardization of BIA measurements. The error in predicted TBW is < 1% within an ambient temperature range of 22.3 to 27.7 degrees C (72.1–81.9 degrees F).

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