Blue Top Blood Tubes: Additives and Preservatives for Phlebotomy Tests
Summary
- Blue top blood tubes are commonly used in phlebotomy for various tests and require specific additives and preservatives.
- The most common additive found in blue top blood tubes is Sodium Citrate, which is used for coagulation studies.
- Other additives include EDTA and Sodium Fluoride, which are used for different types of blood tests.
Introduction
Phlebotomy is the process of drawing blood from a patient for diagnostic or therapeutic purposes. Blue top blood tubes are a common type of blood collection tube used in phlebotomy, particularly for coagulation studies. These tubes contain specific additives and test preservatives that are essential for accurate Test Results. In this article, we will explore the specific additives and test preservatives found in a blue top blood tube used in phlebotomy.
Specific Additive: Sodium Citrate
Sodium Citrate is the most common additive found in blue top blood tubes. It is an Anticoagulant that is used to prevent blood clotting by binding to calcium ions in the blood. This additive is essential for coagulation studies, such as Prothrombin Time (PT) and Activated Partial Thromboplastin Time (aPTT) tests.
Prothrombin Time Test
The Prothrombin Time test measures how long it takes for blood to clot and is used to assess the function of the extrinsic and common coagulation pathways. By adding Sodium Citrate to the blood sample in a blue top tube, it prevents clotting and ensures accurate Test Results.
Activated Partial Thromboplastin Time Test
The Activated Partial Thromboplastin Time test measures the time it takes for blood to clot through the intrinsic and common coagulation pathways. Sodium Citrate in the blue top tube is crucial for this test as well, as it prevents the blood sample from clotting prematurely.
Other Additives in Blue Top Blood Tubes
In addition to Sodium Citrate, blue top blood tubes may also contain other additives and test preservatives for different types of blood tests. Some of these additives include:
- EDTA (Ethylenediaminetetraacetic Acid): EDTA is an Anticoagulant that is used to preserve blood cell morphology and inhibit platelet aggregation. It is commonly used in hematology tests, such as complete blood count (CBC) and Blood Smears.
- Sodium Fluoride: Sodium Fluoride is an additive that inhibits glycolysis in the blood sample, preventing the breakdown of glucose. It is often used in Blood Glucose tests to ensure accurate and stable glucose levels.
Conclusion
Blue top blood tubes are an essential tool in phlebotomy for collecting blood samples for coagulation studies and other types of tests. These tubes contain specific additives and test preservatives, such as Sodium Citrate, EDTA, and Sodium Fluoride, that are necessary for accurate Test Results. Understanding the function of these additives in a blue top blood tube is crucial for healthcare professionals to ensure quality and reliable laboratory Test Results.
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