This test determines Factor XI levels, a clotting protein involved in the intrinsic pathway.

Diagnostic Value: Low levels may indicate Factor XI deficiency, causing mild to moderate bleeding tendency, particularly after surgery or trauma.

Clinical Significance: Helps diagnose bleeding disorders and differentiate between various coagulation factor deficiencies.

Symptom Correlation: Patients may experience nosebleeds, heavy menstrual bleeding, or prolonged bleeding after injury.

The Factor XI Activity test aids in identifying subtle bleeding disorders that might otherwise go undetected.