Whole body impedance measurements reflect total body water changes. A study in hemodialysis patients

1990 ◽  
Vol 7 (3) ◽  
pp. 163-169 ◽  
Author(s):  
Olle Ljungqvist ◽  
Gunilla Hedenborg ◽  
Stefan H Jacobson ◽  
Lars-Eric Lins ◽  
Kickan Samuelson ◽  
...  
Keyword(s):  
Total Body Water ◽  
Hemodialysis Patients ◽  
Body Water ◽  
Whole Body ◽  
Impedance Measurements ◽  
Body Impedance ◽  
Total Body

Correlation of whole-body impedance with total body water volume.

1969 ◽  
Vol 27 (4) ◽  
pp. 531-534 ◽  
Author(s):  
E C Hoffer ◽  
C K Meador ◽  
D C Simpson
Keyword(s):  
Total Body Water ◽  
Body Water ◽  
Whole Body ◽  
Water Volume ◽  
Body Impedance ◽  
Total Body

A RELATIONSHIP BETWEEN WHOLE BODY IMPEDANCE AND TOTAL BODY WATER VOLUME

1970 ◽  
Vol 170 (2 International) ◽  
pp. 452-461 ◽  
Author(s):  
Earl C. Hoffer ◽  
Clifton K. Meador ◽  
David C. Simpson
Keyword(s):  
Total Body Water ◽  
Body Water ◽  
Whole Body ◽  
Water Volume ◽  
Body Impedance ◽  
Total Body

TOTAL BODY WATER REDUCTION IS ASSOCIATED WITH BLOOD PRESSURE DROP IN HEMODIALYSIS PATIENTS

2004 ◽  
Vol 22 (Suppl. 1) ◽  
pp. S193
Author(s):  
Marcospaulo Milagres ◽  
Caciane Souza ◽  
Clarissa Carvalho ◽  
Claudio Amaral ◽  
Cynthia Soares ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Pressure Drop ◽  
Total Body Water ◽  
Hemodialysis Patients ◽  
Body Water ◽  
Water Reduction ◽  
Total Body

scholarly journals Anthropometrically estimated total body water volumes are larger than modeled urea volume in chronic hemodialysis patients: Effects of age, race, and gender

2003 ◽  
Vol 64 (3) ◽  
pp. 1108-1119 ◽  
Author(s):  
John T. Daugirdas ◽  
Tom Greene ◽  
Thomas A. Depner ◽  
Cameron Chumlea ◽  
Michael J. Rocco ◽  
...  
Keyword(s):  
Total Body Water ◽  
Hemodialysis Patients ◽  
Chronic Hemodialysis ◽  
Body Water ◽  
Race And Gender ◽  
Water Volumes ◽  
Total Body ◽  
And Gender

Segment-specific resistivity improves body fluid volume estimates from bioimpedance spectroscopy in hemodialysis patients

2006 ◽  
Vol 100 (2) ◽  
pp. 717-724 ◽  
Author(s):  
F. Zhu ◽  
M. K. Kuhlmann ◽  
G. A. Kaysen ◽  
S. Sarkar ◽  
C. Kaitwatcharachai ◽  
...  
Keyword(s):  
Gold Standard ◽  
Total Body Water ◽  
Body Fluid ◽  
Hemodialysis Patients ◽  
Fluid Volume ◽  
Whole Body ◽  
Bioimpedance Spectroscopy ◽  
Specific Resistivity ◽  
Body Fluid Volume ◽  
Total Body

Discrepancies in body fluid estimates between segmental bioimpedance spectroscopy (SBIS) and gold-standard methods may be due to the use of a uniform value of tissue resistivity to compute extracellular fluid volume (ECV) and intracellular fluid volume (ICV). Discrepancies may also arise from the exclusion of fluid volumes of hands, feet, neck, and head from measurements due to electrode positions. The aim of this study was to define the specific resistivity of various body segments and to use those values for computation of ECV and ICV along with a correction for unmeasured fluid volumes. Twenty-nine maintenance hemodialysis patients (16 men) underwent body composition analysis including whole body MRI, whole body potassium (40K) content, deuterium, and sodium bromide dilution, and segmental and wrist-to-ankle bioimpedance spectroscopy, all performed on the same day before a hemodialysis. Segment-specific resistivity was determined from segmental fat-free mass (FFM; by MRI), hydration status of FFM (by deuterium and sodium bromide), tissue resistance (by SBIS), and segment length. Segmental FFM was higher and extracellular hydration of FFM was lower in men compared with women. Segment-specific resistivity values for arm, trunk, and leg all differed from the uniform resistivity used in traditional SBIS algorithms. Estimates for whole body ECV, ICV, and total body water from SBIS using segmental instead of uniform resistivity values and after adjustment for unmeasured fluid volumes of the body did not differ significantly from gold-standard measures. The uniform tissue resistivity values used in traditional SBIS algorithms result in underestimation of ECV, ICV, and total body water. Use of segmental resistivity values combined with adjustment for body volumes that are neglected by traditional SBIS technique significantly improves estimations of body fluid volume in hemodialysis patients.

scholarly journals An improved method for estimating changes in whole-body fat and protein mass in man

1989 ◽  
Vol 62 (2) ◽  
pp. 311-314 ◽  
Author(s):  
P. R. Murgatroyd ◽  
W. A. Coward
Keyword(s):  
Total Body Water ◽  
Compartment Model ◽  
Body Water ◽  
Whole Body ◽  
Water Yield ◽  
Protein Mass ◽  
Body Composition Change ◽  
Three Compartment Model ◽  
Total Body ◽  
Mass Volume

Sequential measurements of body density or total body water yield inaccurate estimates of body composition change unless the proportions of protein, water and mineral in lean tissue remain constant. Since rates of change of bone mass in adults are likely to be small compared with those of fat or protein mass, volume and total body water measurements can be combined in a three-compartment model to estimate fat and protein changes assuming constant mineral mass. This new model minimizes the bias inherent in estimates of fat or protein changes made from separate density or total body water measurements.

scholarly journals Development of a population-specific regression equation to estimate total body water in hemodialysis patients

1997 ◽  
Vol 51 (5) ◽  
pp. 1578-1582 ◽  
Author(s):  
Glenn M. Chertow ◽  
J. Michael Lazarus ◽  
Nancy L. Lew ◽  
Lihong Ma ◽  
Edmund G. Lowrie
Keyword(s):  
Total Body Water ◽  
Hemodialysis Patients ◽  
Body Water ◽  
Regression Equation ◽  
Total Body
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