Investigation Name:FVIII Inhibitor Assay

Alias or Abbreviation:Bethesda assay

Pathology Laboratory:Haematology Ext 88245

Requestable Seperately?No

Units:Bethesda (BU)

Minimum Sample Volume:Bethesda (BU)

Expected Turnaround Time:3 weeks

Test Code:F8IS

Sample Type:

Complex Reference Range:No inhibitor present <1 BU, Weak inhibitor present 1-10 BU, Strong FVIII inhibitor present >10 BU

Collection Conditions / Other Information:Should frozen within 4 hours of specimen collection. Please discuss with Consultant Haematologist before requesting this test. Paediatric sample tubes are available from the laboratory for children and difficult to bleed patients. These tubes require 1ml of blood to be taken (5 paediatric tubes required) Underfilled or overfilled samples will not be processed as the ratio of anticoagulant to blood in the tube will be incorrect. Clotted and grossly haemolysed samples cannot be processed. Haemolysis, Icterus and lipaemia may interfere with testing and so manual methods may be required to gain results.

Referred to Another Laboratory?No