Test Description: Protein S – Functional

The Protein S Functional test measures the activity of Protein S, a natural anticoagulant that works alongside Protein C to regulate blood clotting. This test evaluates how well Protein S is functioning in preventing abnormal clot formation. Deficiencies or reduced activity of Protein S can increase the risk of developing blood clots, leading to conditions such as deep vein thrombosis (DVT) or pulmonary embolism (PE). The test is commonly used to diagnose clotting disorders, assess genetic risk factors for thrombophilia, or monitor patients with a history of abnormal clotting events.