Protein C and Protein S
Formal name: Protein C, Functional or Antigen; Protein S Free (Functional) or Antigen (Total)
Related tests: Factor V Leiden; Prothrombin 20210; Homocysteine; Lupus Antibodies; Antithrombin Activity
At a Glance
Why Get Tested?
To help evaluate a thrombotic episode; to determine whether you may have an inherited or acquired Protein C or Protein S deficiency
When to Get Tested?
When you have had an unexplained thromboembolism; when your newborn has a severe clotting disorder, such as disseminated intravascular coagulation (DIC) or purpura fulminans; sometimes when a close relative has an inherited Protein C or Protein S deficiency
Sample Required?
A blood sample drawn from a vein in your arm
