Phlebotomy Tubes

Phlebotomy tubes are essential for collecting blood specimens and ensuring accurate testing in laboratories. Each tube color corresponds to specific additives that play a crucial role in blood collection and serum separation. The yellow top tube is primarily used for blood cultures and contains sodium polyanethol sulfonate, which is vital for growth of certain bacteria in culture tests. Additionally, the light blue top tube contains sodium citrate, utilized for coagulation studies by binding calcium in the blood, making it an essential tool in testing for bleeding disorders. The red top tubes are commonly used for serum testing, particularly in chemistry and blood banking. These tubes can come with or without a clot activator, which influences how the blood is processed after collection. Gold-topped tubes, also known as serum separator tubes (SST), are equipped with a gel that separates serum from blood cells, ensuring that only the liquid portion is used for tests after centrifugation. Understanding which tube to use is fundamental for both phlebotomists and medical professionals involved in diagnostics. Misuse of these tubes can lead to inaccurate test results, affecting patient diagnoses and treatment plans. As a phlebotomist-in-training, mastering the types of tubes and their correct applications is key to your future success in the field.