インピーダンス法による日本人の体水分量推定式

DOI NDLデジタルコレクション PubMed 被引用文献7件

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  • Equation for Estimating Total Body Water by Bioelectrical Impedance Measurements in Japanese Subjects.

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This article reports a study in which the equation for total body water (TBW) estimated from deuterium(2H20)-dilution method and bioelectrical impedance measurement (BIM) is described. Subjects were 60 healthy males aged 30±l8.3yr (18-74) and 31 healthy females aged 37±17.5yr (19-70). Total body water determined by the analysis of the dilution of orally ingested deuterium oxide (1g2H20, 99.75 atom % excess/kg body weight) in urine. Bioelectrical impedance was measured for each subjects in a supine position using an electrical impedance analyzer (500/lA, 50kHz, T-1988K, Toyo Physical Inc.) with a four electrodes (Y-250, Nihon Kohden). The mean values of total body water and the impedance in males and females subjects were 34.l±4.27l and 25.7±2.42l, 567±28.5Ω and 562±32.5Ω, respectively. Height squared divided by resistance (Ht2/R) correlated well with TBW as measured by 2H2 O, r=0.530 (p<0.001) in males and r=0.782 (p<0.001) in females. The best-fitting regression equation to predlct TBW comprised Ht2/R(X1) and body w-eight(X2) (R =0.915, SEE= 1.70 l in males and R =0.834, SEE=1.28 l in females). Equation were provided with BIM instrument for the predrctlon of TBW for males TBW l=0.1983X1-0.4004X2 0.7938 and for females TBW, l =0.3536X1+0.1269X2+3.3417. These results suggest that bioelectrical impedance measurement is a useful measure of total body water in Japanese subjects.

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