Whole Blood Vacuum Blood Collection Tube
▶EDTA tubes are coated with EDTA-K2 or EDTA-K3.they are for the examination of whole blood in haematology and can be used in direct sampling analyzers without actually being opened.EDTA binds the calcium ions and therefore blocks the coagulation cascade. Erythrocytes,leucocytes and thrombocytes in an EDTA anticoagulated blood sample are stable for up to 24 hours.
▶ESR tubes contain a 3.8% buffered tri-sodium citrate solution (0.129mol/L)with the mixing ratio of 1 part citrate solution to 4 parts blood.They are used for blood collection and anticoagulation for sedimentation rate test. ESR Tube with Sandwich Material consists of inner tube made of PP and outer tube made of PET. Inner tube made of PP can avoid the additive decrease, which maintains the concentration of sodium citrate stable. Outer tube made of PET can guarantee vacuum stable for long time.