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KMID : 0371919930060010273
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Journal of Wonju College of Medicine
1993 Volume.6 No. 1 p.273 ~ p.278
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Clinical Application of Bioelectrical Impedance Method Total Body Water
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Abstract
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The assessement method of human body composition by bioelectrical impedance is very simple, safe, rapid and noninvasive but there were few reports for human basic data and clinical application has been questionable. In addition measuring apparatus was not developed in Korea. So determination of impedance were made in 100 patients by self-designed apparatus (23 healthy volunteers, 26 cardiac surgical patients under cardiopulmonary bypass, 27 general surgical patients and 24 non surgical patients). There were 71 male and 29 female patients. Their ages ranged from 1 to 78 years (mean 34.1 ± 18.4). 50 kHz 800uA current was applied via the distal electrodes of each pair and the voltage drop was measured by proximal electrodes and impedance was derived from Ohm´s law. It can be used to predict for body fluid balance. We measure on 2 hour and 11 hour after eating, immediate post operative state and 1 day after operation for trend.
Impedance of each age group shows no statistical difference and female shows higher than male. Body weight change between 2 and 11 hour after eating is 1.45±1.43 kg(mean±standard deviation), which is body fluid loss and corresponded to about 30 Ohm change. Continous measuring of 7 individual volunteers show smaller standard deviation.
In conclusion clinical application of bioelectrical impedance method for individual patient by continous monitoring is useful to assess total body water.
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