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Test Code VIII Factor VIII Assay

Cerner Test Code

FAC VIII

Acceptable Collection Tube(s) or Specimen

Blue

Specimen Draw Volume

2.7 mL

Processing Instructions

Draw 2.7 ml in a Blue Top tube. Tube must be filled appropriately to the fill line to ensure accurate results. Centrifuge tube, aliquot 1.0 mL plasma, centrifuge plasma again, and place 1 ml of platelet-poor plasma in an aliquot and freeze. Plasma is only stable at Room Temperature for 4 hours. If testing will be delayed >4 hours, freeze.

Stability

Stability: Plasma: Room temp 2 hrs, Refrigerated 2 hrs, Frozen 3 months Whole Blood: tubes left capped/unspun are stable for 2 hours at room temperature.

Performed Test Frequency

Weekdays,0600-1400|Everyday,0000-2359|Stat testing performed 24 hrs.

CPT(s)

85240

Methodology

aPTT Clot-Based Assay

Performing Location

MercyOne Des Moines Laboratory, Hematology

Rejection Criteria

Rejection criteria: Hemolyzed and refrigerated plasma.