Abstract: 【Abstract】Bioelectrical impedance is a non- invasive, cheap, safe, and maneuverable technology that displays the electrical characteristics and the rule of electrical changes in biological tissues and organs to reflect biomedical information about human physiological and pathological conditions. Currently, bioelectrical impedance has been widely used in research and clinical practice to measure human body components, such as hydration situation, non-fatty substances and fatty substances, useful for the assessment of body fluid capacity and nutritional status, the early diagnosis of disease and the supervision of disease status during therapeutic period. This article reviews the use of bioelectrical impedance for the evaluation of protein energy wasting in hemodialysis patients, allowing early detection and intervention of the abnormality, and management of hemodialysis patients to reduce hospitalization rate and mortality rate.

Key words: Bioelectrical impedance, Hemodialysis, Protein energy wasting