Ângulo de fase e análise vetorial de impedância bioelétrica em pacientes hospitalizados com sarcopenia

Abstract

This study aimed to evaluate the predictive capacity of Phase Angle and Bioimpedance Vector Analysis in the evaluation of adult and elderly patients hospitalized with sarcopenia. This is a cross-sectional, descriptive and quantitative study, carried out at the Lagarto University Hospital (HUL), in Sergipe. A total of 70 participants composed of adults and elderly individuals were included in the study sample. Anthropometric assessment, muscle strength assessment and electrical bioimpedance were performed, and information for Bioimpedance Vector Analysis and calculation of Appendicular Muscle Mass and Phase Angle were obtained through electrical bioimpedance. To assess muscle strength, a dynamometer was used. Sarcopenia was defined as low muscle strength and low muscle mass according to the guidelines of the European Working Group on Sarcopenia in Older People 2. The statistical program R Core Team was used for data analysis, adopting a 95% confidence interval. In this study, it was observed that 34.3% of the participants were classified as sarcopenic. The vector displacement analysis demonstrated a lower cell mass in sarcopenic men and women. The Phase Angle, in turn, also correlated with the Height-Adjusted Appendicular Muscle Mass in both sexes. The present study showed the good predictive capacity of the Phase Angle as an indicator of muscle strength and quality of muscle mass in hospitalized patients.