What Are Blood Draw Tube Colors?
Blood draw tube colors are the differently-colored stoppers on the tops of the tubes used to collect blood samples. These are important because the color of the stopper indicates the type of sample being collected and the preservatives or additives that are in the tube. This is important so that laboratory professionals can determine the treatment of the sample before testing. Each color has a specific meaning, and without the correct tube, the sample can be contaminated or rendered useless.
Common Blood Draw Tube Colors
The most common blood draw tube colors are red, grey, green, yellow, blue, and lavender. Each of these colors has a specific meaning and purpose. For example, the red-topped tube is used for collecting serum, the grey-topped tube is for collecting heparinized blood, and the green-topped tube is for collecting EDTA blood. The yellow-topped tube is for collecting sodium-citrate blood, the blue-topped tube is for collecting plasma, and the lavender-topped tube is for collecting EDTA-sodium heparinized blood.
Red-Topped Tubes
The red-topped tube is the most commonly used tube in blood collection. This tube is used to collect serum, which is the clear yellow liquid found in the blood. It is used in many different types of tests, including cholesterol and glucose levels, electrolyte levels, complete blood count, and liver function tests. The red-topped tube contains no preservatives or additives, so the sample must be separated and processed quickly.
Grey-Topped Tubes
The grey-topped tube is used to collect heparinized blood, which is blood that has been treated with heparin, an anticoagulant. This tube is used for tests that require an anticoagulant, such as blood chemistry tests, blood gas tests, and certain types of immunoassays. The heparin in the tube prevents the blood from clotting and ensures the accuracy of the test.
Green-Topped Tubes
The green-topped tube is used to collect EDTA blood, which is blood that has been treated with EDTA, an anticoagulant. This tube is used for tests that require an anticoagulant, such as blood chemistry tests, blood gas tests, and certain types of immunoassays. The EDTA in the tube prevents the blood from clotting and ensures the accuracy of the test.
Yellow-Topped Tubes
The yellow-topped tube is used to collect sodium-citrate blood, which is blood that has been treated with a solution of sodium citrate. This tube is used for tests that require a solution of sodium citrate, such as prothrombin time tests and activated partial thromboplastin time tests. The sodium citrate in the tube prevents the blood from clotting and ensures the accuracy of the test.
Blue-Topped Tubes
The blue-topped tube is used to collect plasma, which is the clear yellow liquid found in the blood. It is used in many different types of tests, including cholesterol and glucose levels, electrolyte levels, complete blood count, and liver function tests. The blue-topped tube contains no preservatives or additives, so the sample must be separated and processed quickly.
Lavender-Topped Tubes
The lavender-topped tube is used to collect EDTA-sodium heparinized blood, which is blood that has been treated with EDTA and sodium heparin. This tube is used for tests that require an anticoagulant, such as blood chemistry tests, blood gas tests, and certain types of immunoassays. The EDTA and heparin in the tube prevents the blood from clotting and ensures the accuracy of the test.
Conclusion
Blood draw tube colors are an important part of the blood collection process. They indicate the type of sample being collected and the preservatives or additives that are in the tube. Each color has a specific meaning and purpose, and it is important that the correct tube is used in order to ensure the accuracy of the test. It is also important to ensure that the sample is processed quickly, as some tubes contain no preservatives or additives.
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