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ID:1048 Intrinsic factor assays
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DescriptionOne stage factor VIII, IX, XI and XII
IndicationTo investigate a bleeding tendency
Additional InfoUses an APTT based clotting method to
Concurrent TestsCoagulation screen
Dietary Requirementsna
InterpretationReported against a normal range

DepartmentSpecialist Laboratory Medicine
Tube Picture
Collection ConditionsCorrectly filled citrate tubes. 2 required for multiple factor assays
Min. Vol

Ref. Range (Male)50-150iu/dL
Ref. Range (Female)50-15iu/dL
Ref. Range (Paed)See Note
Ref. Range NotesFor paediatric reference ranges please refer to Thromb Haemost 2006, 95, 362-72. Developmental haemostasis Critical telephone values: Any abnormal factor assay with clinical details: bleeding. Factor assays less than 10% (unless on a patient known to have a factor deficiency)
IP Acute TAT** Contact Laboratory before requesting **
IP Routine TAT5 days
GP Acute TAT** Contact Laboratory before requesting **
GP Routine TAT5 days
Turnround CommentNA

Originally edited by : CW. Review due on 05/07/2019 14:49:29. Published By LH on 05/07/2018 14:49:29.