3-7 days after setup at PeaceHealth Laboratories’ reference lab.
Specimen Collection Details
One 4.5 mL light blue top tube (sodium citrate).
Within one hour of collection centrifuge and separate plasma. Centrifuge plasma again and separate platelet-poor plasma into a plastic vial. Freeze immediately. CRITICAL FROZEN.
14 days frozen.
2 mL plasma.
1 mL plasma.
Frozen ond dry ice.
Useful in differentiating between a normal multimeric pattern, and an abnormal one, where the High Molecular Multimers are missing, such as in type II vWD. It is necessary to test for vWF:Ag as well as a Ristocetin Cofactor at the same time as the multimer analysis if an interpretation of the pattern is needed.