What is the indication for using a lavender top tube?

The lavender top tube is specifically designed for hematology tests because it contains EDTA (ethylenediaminetetraacetic acid) as an anticoagulant. EDTA effectively prevents blood from clotting, which allows for a clear analysis of the blood's formed elements, such as red blood cells, white blood cells, and platelets. These elements are crucial for a range of hematological assessments, including complete blood counts (CBC) and blood smears.

The specific use of this tube is crucial because other tubes with different additives serve distinct purposes. For example, blood cultures require sterile tubes that promote microorganism growth, while coagulation tests need citrated tubes to assess clotting factors. Blood banking procedures also rely on different types of tubes to ensure proper handling and storage of blood products. Therefore, the lavender top tube's unique role in facilitating accurate hematology test results underscores its importance within the collection of blood specimens.