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Specimen Collection

Von Willebrand Disease (VWD) Screen (includes vWF antigen, Collagen Binding Assay (CBA) & Ristocetin Cofactor (RiCoF))


Test Name
Von Willebrand Disease (VWD) Screen (includes vWF antigen, Collagen Binding Assay (CBA) & Ristocetin Cofactor (RiCoF))
Test Code
VWS
Specimen Type

Whole Blood in Citrate tube. Must be venous or arterial collection, NOT capillary. Fill to line indicated on collection tube.

Minimum Volume
1 x 3mL tube OR 2 x 1.4mL tubes - filled to the line
Comments

Must arrive in the RCH laboratory within 1 hr of collection

Factor VIII assay must be ordered separately

LAB NOTES:

Coagulation Workstation to process according to CH-P-057

Add-On Tests - check with Haematology first (see CH-W-148)

Assay Performed
Haematology
RCH
9345 4200
Laboratory Hours: 24/7
Assay Frequency

Wednesdays. 

Note: Test reported on Thursdays following completion of Factor VIII assay.

VWF: CBA assay may be performed fortnightly due to sample numbers.

ADAMTS13 Activity