Factor XI Activity LabCorp

This Factor XI Activity test helps check how well your blood clots, which can explain why you might be bleeding or bruising easily.

Finding the cause(s) of:

• Bleeding easily: This test measures Factor XI, a protein crucial for blood clotting, helping identify if its deficiency is causing excessive bleeding.
• Bruising easily: Low Factor XI levels can impair clot formation, leading to easy bruising, which this test helps diagnose.
• Family history of bleeding disorders: Factor XI deficiency can be inherited, so this test can confirm if a family history of bleeding is related to this specific clotting factor.
• Heavy periods: Impaired clotting due to low Factor XI can cause unusually heavy menstrual bleeding, which this test can help identify.
• Nosebleeds: Difficulty forming clots due to Factor XI issues can result in frequent or severe nosebleeds, which this test can help diagnose.