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International Journal of Nutrology
Articles
DOI: 10.1055/s-0040-1704007
Submitted: 01-26-2022
Published: 01-26-2022

Bioelectrical Impedance Phase Angle: Utility in clinical practice

Universidade Federal do Rio Grande do Sul, Graduate Program in Medicine, Department of Medical Sciences, Porto Alegre, RS, Brazil
Universidade Federal do Rio Grande do Sul, Medical School, Porto Alegre, RS, Brazil
Hospital de Clínicas de Porto Alegre, Porto Alegre, RS, Brazil
Phase angle Malnutrition Nutrition assessment

Abstract

The choice of the best nutrition assessment method in hospitalized patients remains a challenge. The aim of this study was to review the use of phase angle (PA) in clinical practice. PA is a parameter obtained from bioelectrical impedance analysis, being a derived measure from the relationship between resistance and reactance. Because PA is dependent on body cell mass (BCM) and cell membrane functions, it has been considered a prognostic marker in several clinical conditions. BCM reflects the cellular components responsible for energy transfer and biochemical activity and is considered an excellent reference for expressing the rates of physiological processes, such as energy expenditure and proteolysis. Low PA values suggest cell death or decreased cell integrity, whereas higher PA values suggest a large amount of intact cell membranes, with a consequently better prognosis. The literature lacks studies determining PA reference values, which has prevented its use in routine clinical practice. Reference values are therefore necessary to properly evaluate possible deviations from the population mean.

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How to Cite

Oliveira, P. G. de, Santos, A. S. P. dos, & Mello, E. D. de. (2022). Bioelectrical Impedance Phase Angle: Utility in clinical practice. International Journal of Nutrology, 5(3), 123–127. https://doi.org/10.1055/s-0040-1704007