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Nutrición Hospitalaria

versión On-line ISSN 1699-5198versión impresa ISSN 0212-1611

Resumen

ATILANO-CARSI, Ximena et al. Bioimpedance vector analysis as a tool for the determination and adjustment of dry weight in patients undergoing hemodialysis. Nutr. Hosp. [online]. 2015, vol.31, n.5, pp.2220-2229. ISSN 1699-5198.  http://dx.doi.org/10.3305/nh.2015.31.5.8649.

Background and objective: Overhydration in hemodialysis patients is associated with cardiovascular mortality. Adequate removal of liquids and achievement of dry weight is one of the main goals of therapy. So far there are no clinical or laboratory parameters that are reliable, simple and affordable for its determination. The bioelectrical impedance vector analysis (BIVE) is a tool that allows identifying and monitoring hydration status, so the aim of this study was to use BIVE to adjust the intensity of ultrafiltration and achieve dry weight in hemodialysis patients. Methods: We studied 26 patients on hemodialysis, which were performed monthly measurements of bioelectrical impedance for four months. Corresponding vectors were plotted to know in an individual way the state of hydration, according to which the dry weight was adjusted when necessary. Results: Dry weight adjustment was performed in 13 patients, 7 of which required increase and 6 decrease of dry weight. The displacement of vectors on the ellipses corresponded to the type of intervention made. Dry weight was reached in 84.6% of patients at the end of the study with a significant decrease in mean arterial blood pressure and an increase in phase angle in the group of decrease of dry weight. Conclusions: Bioelectrical impedance vector analysis is an useful tool for adjusting the dry weight in patients undergoing hemodialysis.

Palabras clave : Bioelectrical impedance; Body composition; Ultrafiltration; Hemodialysis; Edema.

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