Pathology Handbook

PLEASE NOTE: Recent changes have been made to this Test

Recent changes for von Willebrand factor Antigen

Recent changes for von Willebrand factor Antigen
Date	Field	Changed From	Changed To
14th October 2024	Assay name	Ristocetin Cofactor	von Willebrand factor Antigen
	Alternative names	RiCoF, von Willebrand activity, vWF activity	vWF antigen
	Request Group	VWR	VWA
	Collection & Request Instructions	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.	Usually ordered as part of von Willebrand factor (vWF) studies, which include von Willebrand factor antigen (vWF Ag), FVIII, vWF collagen binding assay (CBA) and Ristocetin (RicoF). If no other tests in vWF studies are ordered, contact request doctor to confirm that no other tests are required.

von Willebrand factor Antigen

Alternative Names:

vWF antigen

Laboratory:

Haematology

Test Code:

VWA

Medicare rebatable:

Yes

Specimen Types:

Plasma

Container Types:

Sodium 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, vWF collagen binding assay (CBA) 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

Assay Frequency:

Weekly

USEFUL LINKS

Frozen Section Booking Form

Printable Pathology Request Form

Order of Draw - Blood Samples

Pathology Handbook

PLEASE NOTE: Recent changes have been made to this Test

Assay name

Alternative names

Request Group

Collection & Request Instructions

von Willebrand factor Antigen