The Interior wall of the tube is evenly sprayed and coated with either EDTA K2, EDTA K3. Compared with other anticoagulant, EDTA anticoagulant has less influence on the blood cells and cellular morphology. Its Laboratory use is mainly for whole blood hematology (Red Blood Cell, While Blood Cell, Blood Platelet, Leukocyte classification, Hemoglobin and Hematocrit) tests.
Heparin tube is used in blood collection and anticoagulation not only for routine clinical biochemistry tests and emergency biochemistry tests but also for some test items in blood theology. It is coated with lithium heparin or sodium heparin.