Abstract:

ABSTRACT  The assessment of extracellular fluid volume (ECV) and fluid status is both important and challenging problems in hemodialysis patients. A variety of methods are used to assess the ECV，including tracer dilution techniques，relative blood volume monitoring，measurement of inferior vena cava diameter by ultrasound and biochemical markers, which do not reflect the ECV and fluid status accurately because they are indirect methods. Currently, bioimpedance spectroscopy（BIS） appears to be the most practical method for assessing ECV volume and fluid status in dialysis patients.
  

Key words: Key words , hemodialysis , extracellular fluid volume (ECV) , fluid status , Bioimpedance spectroscopy（BIS）