Which tube is used for blood cultures?

The pale yellow tube is specifically designed for blood cultures. This tube typically contains a nutrient broth that supports the growth of bacteria or fungi, allowing for the detection of infections in the bloodstream. Blood culture testing is crucial in diagnosing conditions like septicemia, where prompt identification of pathogens can significantly impact patient outcomes.

In contrast, other tubes serve different purposes. The light blue tube is primarily used for coagulation tests, containing sodium citrate as an anticoagulant. The red tube is often used for serum tests, as it allows blood to clot and facilitates the collection of serum. The lavender tube is mainly used for hematology tests, often containing EDTA as an anticoagulant to preserve blood cell morphology. Each tube is designed with specific additives to suit their particular testing needs, making the pale yellow tube the appropriate choice for blood cultures.