Measurement of total body water by bioelectrical impedance in chronic renal failure.

Abstract

BIA is less accurate for the measurement of TBW in patients with CRF than in healthy subjects, though in some groups of patients the effect of CRF on the validity of this technique may be only mild. Abnormalities of reactance suggest that abnormal variability in the distribution of fluid between intra- and extracellular compartments is the major cause of reduced accuracy of TBW calculated by BIA in CRF patients.