For the RAST test, what does "SST" stand for in relation to sample collection?

The designation "SST" stands for Serum Separator Tube, which is significant for the RAST (Radioallergosorbent Test) as it pertains to the collection and processing of blood samples. The SST is designed to facilitate the separation of serum from the blood cells after centrifugation, allowing for efficient retrieval of serum that is necessary for testing.

When blood is drawn into an SST, the tube contains a gel that forms a barrier between the serum and the cellular component after centrifugation. This is critical for tests like the RAST, which require clear serum to accurately measure allergen-specific IgE antibodies. Proper serum separation is essential to avoid contamination and ensure precise test results. The other options listed do not correctly define the role of SST in the context of blood sample collection.