Protein S Antigen Total and Free Blood Test
Test Code: 164517
Specimen Type: Blood
Protein S Antigen Total and Free Blood Test (Labcorp)
This test provides measurements for Total and Free levels of Protein S Antigen in the blood. Protein S is one of 2 proteins that work together to regulate the formation of blood clots. Protein S along with Protein C helps ensure proper clotting to stop bleeding when the body is injured as well as ensuring that excessive unnecessary clotting does not take place. People who do not have enough of either Protein S or C or have proteins that are not functioning properly can suffer from clotting disorders such as deep venous thrombosis or pulmonary embolism. A deficiency in protein S can be due to an inherited condition or caused by underlying disorders such as liver disease, kidney disease, cancer, or severe infection.
Free protein S is the portion of protein S antigen which is not bound to other proteins on the blood. Measuring both total and free levels can help to determine what type of deficiency a person has. This test is often ordered along with or as a follow-up to a Protein S Activity test. Results of both tests can provide a person and their doctor with more information to determine the cause of their deficiency. A Protein S Deficiency Panel which measures both antigen and activity is also available.
Turnaround for this test is typically 3-5 business days.
Where can I find a Protein S Antigen Total and Free test near me?
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Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.
Avoid Warfarin (Coumadin) therapy for 2 weeks and Heparin therapy for 2 days prior to specimen collection. Consult your doctor prior to discontinuing any medication.