The interior of heparin tubes wall is coated with lithium heparin or sodium heparin. The anticoagulant heparin activates antithrombins, thus blocking the coagulation cascade and producing a whole blood / plasma sample instead of clotted blood plus serum.
green cap vacutainer vacuum blood test tubes is Plasma Tubes with Lithium Heparin and Gel contain a barrier gel in the heparin tubes. The specific gravity of this material lies between the blood cells and plasma. During centrifugation the gel barrier moves upward providing a stable barrier separating the plasma from cells. Plasma may be aspirated directly from the collection tube, eliminating the need for manual transfer to another container.
Hebei Chaoran Medical also produce vacutainer blood collection tube, vacutainer blood collection tubes no additive, MEDICAL TUBES, lab tubes, edta tubes, plain tube, sodium citrate tube, red vap tubes, serum tube, edta blood tube, Gel+Clot adtivator, Sodium Heparin tubes, Lithium Heparin tubes, Sodium citrate 9NC/ 3.2％ Sodium Citrate, Sodium Fluoride & Potassium Oxalate tubes, Sodium Citrate 4NC blood tube, EDTA K3 tubes, EDTAK2 test tubes, Sodium Fluoride & EDTA lab tubes, Fluoride & Potassium Oxalate PET tubes and ect, Glucose Tubes.