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  • Title: Detection of hydration status by total body bioelectrical impedance analysis (BIA) in patients on hemodialysis.
    Author: Oe B, De Fijter WM, De Fijter CW, Straver B, Oe PL, Stevens P, De Vries PM.
    Journal: Int J Artif Organs; 1997 Jul; 20(7):371-4. PubMed ID: 9298408.
    Abstract:
    The purpose of the present study was to investigate whether total body bioelectrical impedance analysis (BIA) could be appropriate to assess normohydration (i.e. dry weight) in hemodialysis patients. This study is warranted, because the simultaneous assessment of both hydration and nutritional status by BIA requires the presence of a situation of normohydration in order to guarantee valid conclusions about the nutritional analysis. Segmental bioelectrical impedance was performed to classify patients according to their hydration status. BIA measurements revealed significant differences in TBW, ECW and ICW/ECW between three hydration subgroups (under-, normo-, and overhydration), whereas ICW was similar. Therefore, TBW, ECW and ICW/ECW appear appropriate variables to assess hydration status in patients on hemodialysis. Hemodialysis diminished ECW significantly, whereas ICW did not change, suggesting that a decrease of ECW explains the fluid loss during hemodialysis.
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