Which of the following tests would NOT typically use a light blue top tube?

The correct choice is based on the specific use and requirements of the light blue top tube in laboratory settings. The light blue top tube is typically used for coagulation studies because it contains sodium citrate, which acts as an anticoagulant. This anticoagulant is specifically suited for tests that assess the blood's ability to clot.

Tests such as prothrombin time (PT), partial thromboplastin time (PTT), and activated partial thromboplastin time (APTT) are all coagulation tests. They require the specific conditions provided by sodium citrate that accurately measure the clotting pathways and times.

On the other hand, the Basic Metabolic Panel (BMP) is a series of blood tests that assess various metabolic functions. It typically evaluates levels of electrolytes, glucose, and kidney function and does not measure coagulation. Consequently, a different type of tube, usually a serum separator tube (often with a red or gold top), is utilized for BMP tests.

Understanding the role of the tube colors and the tests they are designated for is crucial in phlebotomy, ensuring accurate results and proper test processing.