Intrinsic factor assays
One stage factor assays for factors VIII, IX, XI and XII
|Tube||05 (CP) - Citrate|
|Additional Information||The clotting time (APTT) of a sample is adapted to measure the level of a single coagulation factor by the addition of plasma that is deficient only in the required clotting factor.|
|Send to||Specialist Coagulation
Chancellor / Lincoln Wing Link Corridor
St James University Hospital
|Collection Con||Correctly filled citrate tubes. 2 required for multiple factor assays
Samples must be processed within 6 hours of being taken.
|Ref. Range (Male)||50-150iu/dL (FXI 60-150iu/dL)|
|Ref. Range (Female)||50-150iu/dL (FXI 60-150iu/dL)|
|Ref. Range (Paed)||See Note|
|Ref. Range Notes||"For 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 TAT||5 days|
|GP Acute TAT||Contact Laboratory before requesting|
|GP Routine TAT||5 days|
|Telepath||INTJ (F8J, F9J, F11J, F12J)|