Rapid hemostasis tests can be used to monitor heparin therapy, identify disseminated intravascular coagulation (DIC), and detect deep vein thrombosis and pulmonary embolism. The activated clotting time (ACT) test evaluates coagulation status in response to heparin and can help monitor heparin therapy. Elevated levels of fibrin degradation products (FDP) and D-dimer indicate the breakdown of blood clots and can help diagnose DIC and other thrombotic disorders. DIC results from widespread thrombosis and bleeding caused by trauma, infection, and other conditions that deplete coagulation factors and platelets.