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von Willebrand Panel

Mnemonic:    [vW Pan]
Name:    von Willebrand Panel
Specimen:    4 mL plasma from a FULL sodium citrate Blue top tube. Allow tube to fill to proper capacity. Mix immediately by gentle inversion 4 times. Collect 2 full 4.5 mL blue tops.

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.
Transport Temp:    FREEZE
Spec Stability:    Stable 4 hours ambient.
Ref Lab/Code:    ARUP 0030125
  Method:    Clotting/Enzyme Immunoassay
Note:    Panel includes:
-- Factor VIII Activity
-- von Willebrand Factor Antigen (vWF Ag)
-- von Willebrand Factor Activity (Ristocetin Cofactor or RCF)
Processing Info:    Take the tubes to Coagulation for processing.

Separate sample must be submitted when multiple tests are ordered.