Objective To establish the method for assay plasma heparin(Hp) concentration and approach into the reliability of clinical application.Method Concentration of plasma Hp is determinated by micromethod chromogenic substrate and is oberserved in 18 hemodialysis patients suffering from in nephrosis and 2 DIC patients treated in Hp.Result The standard curve is linear in the 0 1~0 8u/ml range.The respective recovery rate are 90 1%,93 2%and 91 4% in hight,middle and low concentration.The within run CV ...