EVALUATE THE CHANGING OF SERUM FERRITIN AND TRANSFERRIN SATURATION IN CHRONIC RENAL DISEASE PATIENTS UNDERGOING HEMODIALYSIS Background: In patients with end-stage renal disease (ESRD) undergoing hemodialysis, the iron index is affected by blood lost, iron supply to the bone marrow and iron therapyevaluate the changing iron index in patients undergoing the first-three month hemodialysis.