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Bioelectrical Impedance Analysis (BIA) of the Esrimation of Total Body Water and Lean Body Mass in Patients with Renal Failure

 Kinch Cha  ;  Seunghoon Choi  ;  Gyubok Choi  ;  Kyunill Yoon  ;  Douglas W Wilmore  ;  J Michael Lazarus 
 Korean Journal of Nephrology (대한신장학회지), Vol.16(3) : 495-500, 1997 
Journal Title
 Korean Journal of Nephrology (대한신장학회지) 
Issue Date
Bioelectrical impedance analysis (BIA) was used to determine total body water (TBW) and lean body mass (LBM) in patients with renal failure. The bodys electrical resistance (R) was measured by the voltage to current ratio, injecting an 800 p A alternating current with a frequency of 50KHZ and detecting a voltage drop between the wrist and the ankle. Impedance index (Height/Resistance) compared favorably with TBW measured by deuterium (DzO) dilution method as the reference, giving the correlation coefficient (r) of 0.966 and standard error estimation (SEE) of 2.71 liter. The index was compared with LBM determined by dual-energy x-ray absorptiometry (DEKA) as the reference, giving r of 0.970 and SEE of 3.00kg. The r of 0.985 and SEE of 2.15kg were found between the reference method. BIA appeared to have a somewhat lower accuracy than those of the reference method. However, it is a useful clinical tool for estimating body composition, because it is easy, rapid and non-invasive. The existing BIA method is based on an extremely simple conductor model of the body. The accuracy may be improved further, based on a more realistic model for the body.
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1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
Yonsei Authors
Choi, Seung Hoon(최승훈)
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