Detection of Hydration Status by Total Body Bioelectrical Impedance Analysis (BIA) in Patients on Hemodialysis

1997 ◽  
Vol 20 (7) ◽  
pp. 371-374 ◽  
Author(s):  
B. Oe ◽  
W.M. De Fijter ◽  
C.W.H. De Fijter ◽  
B. Straver ◽  
P.L. Oe ◽  
...  
Keyword(s):  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Dry Weight ◽  
Impedance Analysis ◽  
Hydration Status ◽  
Fluid Loss ◽  
Nutritional Analysis ◽  
Total Body ◽  
Segmental Bioelectrical Impedance ◽  
Simultaneous Assessment

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.

scholarly journals Application of Multifrequency Bioelectrical Impedance Analysis Method for the Detection of Dehydration Status in Professional Divers

Medicina ◽  
2012 ◽  
Vol 48 (4) ◽  
pp. 29 ◽  
Author(s):  
Sermin Sengun ◽  
Atilla Uslu ◽  
Salih Aydin
Keyword(s):  
Bioelectrical Impedance Analysis ◽  
Decompression Sickness ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Extracellular Water ◽  
Analysis Method ◽  
Fluid Shift ◽  
Predisposing Factor ◽  
Deep Diving ◽  
Total Body

Background and Objective. The level of dehydration has been known to be a predisposing factor for the development of decompression sickness in divers. The aim of this study was to determine the level of dehydration in divers who dove with heliox and to determine whether the source of this dehydration was intracellular and/or extracellular by means of multifrequency bioelectrical impedance analysis (MF-BIA). Material and Methods. Eleven male professional divers were enrolled in the study. In order to determine the level of dehydration, MF-BIA was carried out (at 5, 50, and 100 kHz) and capillary hematocrit (Hct) was measured two times: one before diving and the other after leaving the pressure room. Results. When prediving and postdiving parameters were compared, significant increases in the resistance at 5 kHz (P<0.001), 50 kHz, (P<0.001), and 100 kHz (P<0.01) and Hct (P<0.01) were observed after the diving. Similarly, a statistically significant fluid shift was found: total body water, –1.30 L (P<0.001), extracellular water, –0.85 L (P<0.001); and intracellular water, –0.45 L (P=0.011). Conclusions. Our results showed that mild dehydration occurred both in the intracellular and extracellular compartments in divers after deep diving. This study also indicates that MF-BIA could be a reliable new method for determining the dehydration status in divers.

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