Protein C Antigen

This test measures the levels of the Protein C Antigen test in your blood. Protein C is an important component of your body's natural clotting system. Low levels of Protein C can increase the risk of blood clots and certain clotting disorders.

• To diagnose inherited or acquired Protein C deficiency
• To assess the risk of developing blood clots or thrombosis
• To monitor the effectiveness of treatment for conditions like deep vein thrombosis or pulmonary embolism
• To evaluate liver function in specific cases

Your doctor may recommend this test if you:

• Have a personal or family history of blood clots or clotting disorders
• Experience recurrent miscarriages
• Develop abnormal blood clots at a young age
• Are on anticoagulant therapy and need to monitor its effectiveness

The normal range for the Protein C Antigen test levels is usually between 70% and 140% of the reference range. Abnormal results may indicate Protein C deficiency, which increases the risk of excessive clotting. Your doctor will interpret the results considering your medical history, symptoms, and other diagnostic tests.

During this test:

• A small blood sample will be collected from a vein in your arm
• The procedure is relatively quick and involves minimal discomfort
• The sample will be sent to the laboratory for analysis
• Your doctor will discuss the results with you during a follow-up appointment

Before the test:

• No specific preparations are necessary.
• It is advisable to inform your doctor about any medications or supplements you are taking, as they might affect the test results.
• You may be asked to refrain from eating or drinking for a few hours before the blood draw.

• Protein S Antigen: This test measures another component of the natural clotting system and helps evaluate the risk of blood clots.
• PT (Prothrombin Time) and APTT (Activated Partial Thromboplastin Time): These tests assess overall clotting function and can help diagnose clotting disorders.

Protein C Assay, Protein C Test

Deep vein thrombosis (DVT) is a condition characterised by the formation of blood clots in the deep veins, usually in the legs. If left untreated, these clots can break loose and travel to the lungs, causing a potentially life-threatening condition called pulmonary embolism.