Abstract: Objective To investigate the effect of chyle levels of plasma turbidity plate and degrees of plasma hemolysis shadeguide for reducing the unnecessary retirement of plasma due to objective incorrect assessment in the process of blood collection and supply. Methods Fifteen staffs were randomly grouped to compare the chyle and hemolysis samples in critical level at different light by chyle plasma turbidity plate and plasma hemolysis shadeguide in order to check the influence of the natural or artificial light. The chyle and hemolysis plasma discarding data were analyzed from 2012 to 2013. Results There was no difference between the natural light and the light of lamp（P>0.05）whereas a significant difference was seen between chyle levels of plasma turbidity plate and degrees of plasma hemolysis shadeguide（P<0.05）. In the year of 2012,the rate of chyle plasma discarding was 0.46%,and that of hemolysis plasma discarding was 0.26%. In 2013,however,the rate of chyle plasma discarding was 0.41%,and that of hemolysis plasma discarding was 0.18%.The rates of both plasma discarding have been obviously reduced after using chyle levels of plasma turbidity plate and degrees of plasma hemolysis shadeguide （P≤0.01）. Conclusion The chyle levels of plasma turbidity plate and degrees of plasma hemolysis shadeguide may effectively control the unnecessary retirement of chyle and hemolysis plasma,and can be used as a convenient and effective method to distinguish the chyle and hemolysis plasma in the process of blood collection and supply.

Key words: Chyle, Turbidity plate, Hemolysis, Shadeguide, Plasma discarding