Which test is performed using the orange top tube?

The orange top tube is specifically designed for certain types of tests that require a rapid clotting process, primarily due to its additive, which is thrombin. The thombin is a clotting factor that helps to hasten the coagulation of blood, allowing for quicker serum separation. This is particularly useful in emergency situations where prompt results are necessary, such as in the case of tests for certain hormones or therapeutic drug levels.

While other tests listed may use different types of tubes with various additives, they do not correlate with the use of an orange top tube. Electrolyte tests typically require green or lavender tubes, blood typing is usually performed with a red top or pink top tube, and complete blood counts (CBC) utilize lavender top tubes containing EDTA as an anticoagulant. The configuration of the orange top tube makes it uniquely suited for tests that rely on thrombin’s rapid action for effective results.