Specimen Collection And Handling

For plasma, place the whole blood sample in the collection tube with anticoagulant, gently reverse and mix well, and then fully mix with the blood. The supernatant is the plasma sample after centrifugation at 3000 rpm for 10 min. For serum, it is lack fibrinogen compared with plasma. Collect the whole blood sample in a collection tube without anticoagulant, and put it at room temperature for 2-4 hours, or place it inclined at 4 ℃ in the refrigerator overnight. The blood coagulates and naturally precipitates serum, which can be centrifuged at 3000 rpm for 10 minutes to preserve. The serum and plasma are all light yellow and translucent liquid. When sampling, prevent the blood cells from breaking into the hemolytic state.