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Classification of vacuum blood collection tubes

Views:1     Author:Site Editor     Publish Time: 2020-03-18      Origin:Site

There are 9 types, which are distinguished according to the color of the hat.



1. Common serum tube with red head cover, blood collection tube without additives, used for routine serum biochemistry, blood bank and serology related tests.


2. The orange-red head cover of the rapid serum tube has a coagulant in the blood collection tube to accelerate the coagulation process. The rapid serum tube can coagulate the collected blood within 5 minutes, which is suitable for serial testing of emergency serum.


3. Golden head cap of inert separation gel accelerating coagulation tube, inert separation gel and coagulant are added in blood collection tube. After the sample 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. keep it steady. Procoagulants can quickly activate the coagulation mechanism and accelerate the coagulation process, which is suitable for emergency serum biochemical tests.


4. Green head cap of heparin anticoagulation tube, heparin added in blood collection tube. Heparin has an antithrombin effect directly, which can prolong the clotting time of the specimen. It is suitable for erythrocyte fragility test, blood gas analysis, hematocrit test, erythrocyte sedimentation and general biochemical measurement, but not suitable for hemagglutination test. Excessive heparin can cause white blood cell aggregation and cannot be used for white blood cell counting. Because it can make the blood stained background light blue, it is not suitable for white blood cell classification.


5. Plasma separation tube with light green head cap, adding lithium heparin anticoagulant in the inert separation tube, can achieve the purpose of rapid plasma separation, is the best choice for electrolyte detection, can also be used for routine plasma biochemical measurement and ICU and other emergency plasma Biochemical testing. Plasma specimens can be used directly on the machine and kept stable for 48 hours in a refrigerated state.


6. Purple head cap of EDTA anticoagulation tube, ethylenediaminetetraacetic acid (EDTA, molecular weight 292) and its salt is an amino polycarboxylic acid, which can effectively chelate calcium ions in blood samples, chelate calcium or react calcium Removal of the site will block and terminate the endogenous or exogenous coagulation process, thereby preventing blood samples from coagulating. Suitable for general hematological tests, not for coagulation tests and platelet function tests, nor for calcium, potassium, sodium, iron, alkaline phosphatase, creatine kinase, and leucine aminopeptidase And PCR tests.


7. The sodium citrate coagulation test tube has a light blue cap. The sodium citrate mainly acts as an anticoagulant by chelating with calcium ions in the blood sample. Suitable for coagulation experiments. The National Committee for Clinical Laboratory Standards (NCCLS) recommends an anticoagulant concentration of 3.2% or 3.8% (equivalent to 0.109mol / L or 0.129mol / L). The ratio to blood is 1: 9.


8. Sodium citrate blood sedimentation test tube Black head cap. The sodium citrate concentration required for the blood sedimentation test is 3.2% (equivalent to 0.109mol / L). The ratio of anticoagulant to blood is 1: 4.


9. Potassium oxalate / sodium fluoride gray head cap. Sodium fluoride is a weak anticoagulant. It is usually used in combination with potassium oxalate or sodium iodate. The ratio is 1 part of sodium fluoride and 3 parts of potassium oxalate. . This mixture of 4mg can prevent 1ml of blood from clotting and inhibit glycolysis in 23 days. It is a good preservative for blood glucose measurement. It cannot be used for urease determination of urea, nor for alkaline phosphatase and amylase. Recommended for blood glucose testing.


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