Factor IX Activity

What is the Factor IX Activity Plasma Test?

The Factor IX Activity Plasma Test measures the activity of Factor IX, a protein necessary for blood clotting. It is used to diagnose and monitor hemophilia B and other clotting disorders.


Who should undergo this test?

Individuals with a family history of hemophilia B, unexplained bleeding, or prolonged clotting times should consider this test. It is also recommended for monitoring treatment in hemophilia patients.


How is the test performed?

A blood sample is collected and analyzed using a clot-based assay to measure Factor IX activity levels.


What do abnormal results indicate?

Low Factor IX activity suggests hemophilia B or other clotting disorders, while high levels may indicate an acute-phase response or thrombosis.


What steps follow abnormal results?

Abnormal results may require additional coagulation tests, genetic counseling, and possible treatment with clotting factor concentrates or gene therapy.