Formal name:Protein C, Functional or Antigen; Protein S, Functional or Antigen (Free or Total)
Related tests:Factor V Leiden; Prothrombin 20210; Homocysteine; Lupus Anticoagulant Testing; Antithrombin Activity
Why should I do it?
To help evaluate a thrombotic episode; to determine whether you may have an inherited or acquired Protein C or Protein S deficiency
When should I do it?
When you have had an unexplained blood clot (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
What Kind of Sample is Needed?
A blood sample obtained by inserting a needle into a vein in the arm
Test Preparation Needed?
You must wait at least 10 days after a thrombotic episode and be off oral anticoagulant therapy for 2 weeks before having this test done.