1. Ordinary serum tube has a red cap. The blood collection tube does not contain additives. It is used for routine serum biochemistry, blood bank and serological tests.
2. The orange-red cap of the fast serum tube, with a coagulant in the blood collection tube, can activate the fibrinase and turn soluble fibrin into insoluble fibrin polymer, and then form a stable fibrin clot. The rapid serum tube can coagulate the collected blood within 5 minutes, which is suitable for serialized emergency serum test.
3. The golden cap of the inert separating gel coagulation promoting tube, and the inert separating gel and coagulant are added in the blood collection tube. After the specimen is centrifuged, the inert separation gel can completely separate the liquid components (serum or plasma) and solid components (red blood cells, white blood cells, platelets, fibrin, etc.) in the blood and completely accumulate in the center of the test tube to form a barrier. The specimen is within 48 hours keep it steady. The coagulant can quickly activate the coagulation mechanism and accelerate the coagulation process, which is suitable for emergency serum biochemical tests.
4. The heparin anticoagulation tube has a green cap, and heparin is added to the blood collection tube. Heparin directly has the effect of antithrombin, which can prolong the clotting time of the specimen. It is suitable for red blood cell fragility test, blood gas analysis, hematocrit test, erythrocyte sedimentation rate and general energy biochemical determination, not suitable for blood coagulation test. Excessive heparin can cause the accumulation of white blood cells and cannot be used for white blood cell counting. Because it can stain the blood slice with a light blue background, it is not suitable for white blood cell classification.
