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Ristocetin Cofactor

Alternative Names:RiCoF
von Willebrand activity
vWF activity
Laboratory:Haematology
Test Code:VWR
Medicare rebatable:Yes
Specimen Types:Plasma
Container Types:
Sodium CitrateSodium Citrate
Adults Volume or Mass:2.7 mL
Minimum/Paediatric Volume or Mass:1.7 mL
Collection & Request Instructions:Retrospective testing within 6 hours

Usually ordered as part of von Willebrand factor (vWF) studies, which include von Willebrand factor antigen (vWF Ag), FVIII and Ristocetin (RicoF).

If no other tests in vWF studies are ordered, contact request doctor to confirm that no other tests are required.

Transport Instructions:Room Temperature
Send to lab immediately
Processing Instructions:

Centrifuge immediately for 15 minutes at 2000-2500 g.

Then aliquot plasma into a separate tube. Centrifuge again for 15 minuts at 2000-2500 g.

Assay Frequency:Weekly