Protein S Antigen - Free

Protein S exists in two forms in the blood - 'free' and 'bound'. Only the free Protein S is active and able to assist in preventing blood clots. Hence, the test for 'Free' Protein S gives a more accurate representation of the clotting potential.

This test is performed using a blood sample, which is usually taken from a vein in the arm.

A low level of free Protein S can indicate an increased risk of abnormal blood clotting. However, this result needs to be interpreted in the context of clinical symptoms and other laboratory tests.

No special preparation is required for the test. However, you should inform your healthcare provider of any medications or supplements you're taking as they may affect the test results.

Levels of Protein S can be affected by various factors including pregnancy, oral contraceptive use, hormone replacement therapy, certain medications, liver disease, and vitamin K deficiency.

Normal values can vary depending on the laboratory, but generally, the normal range for free Protein S is around 60-150%.

The frequency of this test depends on your health status and history of clotting disorders. Your healthcare provider will recommend when and how often you should have this test.

There are no specific precautions to take after the test. You can resume your normal activities immediately after the test.

Yes, certain medications, including oral contraceptives, hormone replacement therapy, and anticoagulants, can affect the test results.

If your test results are abnormal, your healthcare provider will discuss the results with you in the context of your overall health and may recommend further testing or treatment as necessary.

If your test results are abnormal, you should consult a hematologist, who is a specialist in blood disorders.

No, this test is not typically part of routine health check-ups. It's performed in individuals with a history of abnormal blood clotting or those with a family history of clotting disorders.

No, this test alone cannot diagnose specific diseases. However, it can help your healthcare provider understand the cause of abnormal blood clotting and guide treatment.

The risk of excessive bleeding from the blood draw for this test is minimal. The phlebotomist will apply pressure and a bandage to the puncture site to prevent any bleeding.

In conclusion, the Protein S Antigen - Free test plays a crucial role in assessing an individual's propensity for blood clotting. While it does not diagnose a specific disease, it can guide further investigations and treatments when coupled with a thorough clinical evaluation and other laboratory tests. Regular consultations with your healthcare provider will ensure optimal health management, particularly if you have a personal or familial history of clotting disorders.