CPT® Code 84431

Thromboxane is a bioactive lipid produced by platelets that plays a crucial role in hemostasis, primarily by promoting blood clotting and causing the constriction of blood vessels. There are two main forms of thromboxane: Thromboxane A2, which is biologically active but highly unstable, and Thromboxane B2, which is an inactive metabolite of Thromboxane A2. The measurement of thromboxane metabolites, particularly Thromboxane B2, in urine is significant for evaluating various pathological conditions. The excretion of these metabolites can provide valuable insights into several disease states, including liver disease, inflammatory lung diseases, and organ rejection in transplant patients, among other medical conditions. For accurate assessment, a 24-hour urine sample is typically collected, allowing for comprehensive testing of thromboxane B2 metabolites. Additionally, the specimen may also be analyzed for the presence of Thromboxane A2, further enhancing the diagnostic utility of this test.