Objective To explore the impact of niaoduqing granules on heme oxygenase- 1( HO-1) in the patients with maintenance hemodialysis( MHD). Methods Two hundred and forty cases with MHD for over half a year were randomized into a dialysis control group,a Chinese medicine group( niaoduqing granules for oral administration) and a western medicine group( vitamin E for oral administration),80 cases in each group. Additionally,a health control group( 30 cases) was set up. HO- 1 level was determined before treatment a...