Abstract
to compare the body composition of patients undergoing hemodialysis with that of healthy individuals using different methods. cross-sectional study assessing male individuals using anthropometric markers, electrical bioimpedance and vector analysis. the healthy individuals presented larger triceps skinfold and arm circumference (p<0.001). The bioimpedance variables also presented significant higher values in this group. Significant difference was found in the confidence interval of the vector analysis performed for both the patients and healthy individuals (p<0.0001). The tolerance intervals showed that 55.20% of the patients were dehydrated, 10.30% presented visible edema, and 34.50% were within normal levels of hydration. Bioimpedance and vector analysis revealed that 52% of the patients presented decreased cell mass while 14.00% presented increased cell mass. the differences in the body composition of patients and healthy individuals were revealed through bioimpedance and vector analysis but not through their measures of arm circumference and arm muscle area.
Highlights
The number of studies addressing the body composition of chronic renal patients undergoing hemodialysis (HD) due to changes in fat tissue and muscle metabolism, and presenting water-electrolyte imbalances that pose the risk of mortality and morbidities, has recently increased[1,2].The methods commonly used to assess body compartments are skinfold thickness, bioelectrical impedance (BIA), and bioelectrical impedance vector analysis (BIVA) for being simple, fast, reproducible and less costly[3]
Some studies report that results may be overestimated when BIA is employed in hemodialysis patients[3,5]
The participants’ profiles show that 55% of the PG were former smokers, 69% had an income below five times the minimum wage, 62% completed primary school, 72% were married, and 52% were 60 years old or younger
Summary
The number of studies addressing the body composition of chronic renal patients undergoing hemodialysis (HD) due to changes in fat tissue and muscle metabolism, and presenting water-electrolyte imbalances that pose the risk of mortality and morbidities, has recently increased[1,2].The methods commonly used to assess body compartments are skinfold thickness, bioelectrical impedance (BIA), and bioelectrical impedance vector analysis (BIVA) for being simple, fast, reproducible and less costly[3]. The vector’s length reflects the individual’s level of hydration, so that the higher the vector the lower the quantity of water and the greater the resistance (R), while a larger phase angle is associated with a better nutritional state[6]. This technique permits assessing the patient’s level of hydration and distinguishing body tissues with greater contents of water (muscles) and those with lower contents of water (fat tissue, lungs and bones)(3). Cell membranes act as conductors and cell content acts as dielectric material, storing the charge when the current passes between intra and extracellular compartments[3]
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