Factor IX
| About This Test |
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Department: Haematology Requirement: COAGULATION TUBES MUST BE FILLED TO LINE. Specialist coagulation testing, would not normally be requested as a first-line test.
Turnaround Time: Up to two weeks if non urgent |
Deficiency of factor IX causes haemophilia B, also known as 'Christmas Disease'.
Requests must be vetted by a Consultant Haematologist or Paediatrician.
Other Comments:
Reference range: 50-150 IU/dL