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von Willebrand Factor Antigen (Factor VIII Related Antigen)

Mnemonic:    [vWF Ag]
Name:    von Willebrand Factor Antigen (Factor VIII Related Antigen)
Specimen:    2 mL plasma from a FULL sodium citrate Blue top tube. Allow tube to fill to proper capacity. Mix immediately by gentle inversion 4 times.
The sample must be centrifuged immediately in a precalibrated, authorized centrifuge. The sample must be doubly spun to insure that it is platelet poor plasma. We recommend that patients be sent to the outpatient phlebotomy lab, so the samples can be processed appropriately.
Minimum Spec:    1 mL
Transport Temp:    FREEZE
Ref Lab/Code:    ARUP 0030285
  Method:    Enzyme Immunoassay
Processing Info:    Take the sample to Coagulation for processing.

Separate samples must be submitted when multiple tests are ordered.