This test detects the active/recent (IgM) 'first-responder' antibodies against phospholipids. A positive result signals a current autoimmune response, which is linked to an increased risk of blood clotting. It is an essential test for a timely and accurate diagnosis of Antiphospholipid Syndrome, especially when investigating an acute clotting event. This simple blood test provides the 'real-time' data your doctor needs to make a fast, accurate diagnosis and create an immediate action plan.