blood collection tubes with anticoagulant

blood collecting tubes with anticoagulant in the tube:

tubes for blood collection(green head collection tubes for blood) containing sodium heparin or lithium heparin: Heparin is a mucopolysaccharide containing a sulfate group with a molecular weight of 15000. Blood enzymes inactivate serine proteases, thereby preventing the formation of thrombin, and have various anticoagulant effects such as preventing platelet aggregation. Heparin is an excellent anticoagulant, which has little interference with blood components, does not affect the volume of red blood cells, and does not cause hemolysis. Because heparin has the effect of antithrombin, it is not suitable for blood coagulation tests. Excessive heparin can cause the aggregation of leukocytes and cannot be used for leukocyte counting. It is not suitable for leukocyte classification because it can make the blood film stained with a light blue background. Since heparin cannot disperse the isolated platelets and become single particles or cells passing through the micropores, the platelet count can be reduced, and the white blood cell count and lymphocyte count can be high. Commercial heparin often contains phosphate, which can make the determination of inorganic phosphorus on the high side. Heparin anticoagulation should be used for a short period of time, otherwise, the blood may coagulate if left for too long.