Laboratory: Hematology
Test Name:
FACTOR VIII CHROMOGENIC ASSAY - HSC - (P)
Test Code: CAF8
Clinical Information:
Clinical Hematology consult required prior to collection or initiate hemostasis (Hematopathologist) consult F140-80-48A.


The Chromogenic Factor VIII assay is used only for monitoring FVIII levels in patients receiving emicizumab.

Collection Devices:
Preferred Device:
1 - Na Citrate 1.8mL Tube(s) - Full Tube Collection
Specimen Required:
Plasma: 1.0 mL

NaCitrate Tubes: Centrifuge according to lab's current process for coagulation sample.  Remove plasma with transfer pipette. Do not disturb buffy coat. Place in plastic tube and re-centrifuge, capped.  Remove plasma again leaving small portion and aliquot into plastic tube, cap and indicate "spun x 2" on labels.  Freeze immediately at -20°C.  Transport frozen on ice.
 
Referral:

Test performed at: HSC Haemostasis Laboratory Ph: 204-787-2105.
Requisition:
Reference Values:
See report.
Availability:
See Also:
More Information:
Samples are to be forwarded to the Hemostasis Lab regardless of sample volume or number of tubes for discussions with the physician and the lab director.