What are anticoagulant blood collection tubes?

1) Heparin tube (green cap) blood collection tube: 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. It is suitable for red blood cell osmotic fragility test, blood gas, plasma permeability , hematocrit, erythrocyte sedimentation rate and general biochemical determination.
2) Blood collection tube (purple cap): EDTA is chelated with calcium ions in the blood, so that the blood does not coagulate. Generally, 1.0~2.0 mg can prevent 1 ml of blood from coagulating. This anticoagulant does not affect the count and size of white blood cells, has minimal effect on the morphology of red blood cells, and can inhibit the aggregation of platelets, so it is suitable for general hematological tests. Usually, the method of spraying is adopted to make the reagent evenly adhere to the tube wall, so that the blood sample can be quickly and fully mixed after sampling. Blood collection tube classification
3) Blood coagulation tube (blue cap) blood collection tube: quantitative liquid sodium citrate anticoagulant buffer is added to the blood collection tube. Anticoagulant and the rated blood collection volume are added in a ratio of 1:9 for the examination of coagulation mechanism items (such as PT, APTT). The principle of anticoagulation is to combine with calcium to form soluble calcium chelate and prevent blood from coagulating. The recommended anticoagulant concentration required for hemagglutination assays is 3.2% or 3.8%, which is equivalent to 0.109 or 0.129 mol/L. For the blood coagulation test, if the blood ratio is too low, the APTT time will be prolonged, and the prothrombin time (PT) results will also be significantly changed. Therefore, whether the ratio of anticoagulant to the rated blood collection volume is accurate or not depends on this type of product. important standard of quality.
4) ESR tube (black cap) blood collection tube: The anticoagulation system of the blood collection tube is the same as that of the blood coagulation tube, except that the sodium citrate anticoagulant and the rated blood collection volume are added in a ratio of 1:4 for ESR examination.
5) Blood glucose tube (gray cap) blood collection tube: fluoride is added to the blood collection tube as an inhibitor. Due to the addition of the inhibitor and the special treatment of the inner wall of the test tube, the original properties of the blood sample are maintained for a long time, and the metabolism of blood cells is basically stagnant. It is widely used in the examination of blood glucose, glucose tolerance, erythrocyte electrophoresis, anti-alkali hemoglobin, and glucose hemolysis.