Investigation Name:Factor Assays (II,V,VII,VIII,IX,X,XI,XII)

Alias or Abbreviation:FII, FV, FVII, FVIII, FIX, FX, FXI, FXII

Pathology Laboratory:Haematology Ext 88245

Requestable Seperately?No

Lower Reference Range Limit:50

Upper Reference Range Limit:150

Units:iu/dL

Minimum Sample Volume:3 samples

Expected Turnaround Time:9-20 days depending on assay unless urgent

Test Code:eg FVIII

Sample Type:

Maximum Add on Time:4 hours

Collection Conditions / Other Information:Should be tested or frozen within 4 hours of specimen collection. Please contact the haematology laboratory for any Urgent requests. Add on requests - unsuitable. A fresh sample must be sent if required. If PT or APTT results are prolonged and there is no obvious cause eg on anticoagulants please discuss with Consultant Haematologist before requesting Factor assays. 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 are 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