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Recent changes for von Willebrand Screen
Unassigned
Haematology
Weekly
Fortnightly
Tests included in screen are VWAG, VWFACT and F8.
Specimens for vWD screening kept at room temperature, should be centrifuged and tested within 4 hours of time of collection.
If testing is not complete within 4 hours, plasma should be removed from the cells (6 X 1 mL Eppendorf tubes) and frozen at -20 C for up to 2 weeks or -70 C for up to 6 months.
A frost-free freezer should not be used.
To comply with HIC ruling tests must be requested individually.
2 x Sodium citrate tubes
Includes INR, APTT, von Willebrand Factor, Factor VIII and vW Antigen.
vWF:Ag and vWF:Ristocetin Cofactor Activity (Adult): 50 - 160%
vWF disease investigation for <18 yo, please call laboratory Haematologist to discuss.
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