Factor IX assay

Christmas factor assay; Serum factor IX; Hemophilic factor B; Plasma thromboplastin component; PTC

The factor IX assay is a blood test that measures the activity of factor IX. This is one of the proteins in the body that helps the blood clot.

How the Test is Performed

How to Prepare for the Test

How the Test will Feel

Why the Test is Performed

Normal Results

What Abnormal Results Mean

Risks