Abstract: Objective To Analyze the causes of abnormal color of plasma,so as to reduce waste of blood and ensure transfusion safety. Method Blood donors information was analyzed and the total bilirubin content of the plasma with abnormal color was detected from 2011 to 2014. Results The total bilirubin of the green anomaly plasma was found to be lower than that of normal plasma. Most plasma abnormalities were temporary,which was frequently seen in the fall and winter seasons.Repeatedly noted plasma color abnormalities accounted for 5.77%. Conclusion Edible pigment is most likely the reason in most of the green plasma. Some repeated abnormalities may be associated with liver metabolism and should not be used in blood donation.

Key words: Abnormal plasma color, Blood donation, Blood safety, Total bilirubin