EDTA tube is widely used in clinical haematology , crossmatching , blood grouping as well as various kinds ofblood cell test instruments . It offers a comprehensiveprotection for blood cell , especially for protectingthe blood platelet , so that it can effectively stop thegathering of blood platelet and makes the form andvolume of blood cell influenced within a lona timeEDTA anticoagulant plasma is used for biologicalassay of pathogenic microorganism , parasite andbacterial molecule etc