Pathology Handbook

Assay name

Von Willebrand Factor Antigen

Von Willebrand studies

Alternative names

von Willebrand factor, vWF Ag, von Willebrand factor studies

von Willebrand factor, vWF Ag, von Willebrand factor studies, von Willebrand factor activity, Ristocetin activity, collagen binding assay

Request Group

VWA, VWR, F8

VWR, F8

MBS rebatable

No

Yes

Collection & Request Instructions

2 CITRATE REQUIRED. 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.

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

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

Preferred Container Type

Sodium Citrate

Sodium Citrate x 2

Preferred Container Type

Sodium Citrate x 4

Sodium Citrate

Collection & Request Instructions

4 CITRATE REQUIRED. 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.

2 CITRATE REQUIRED. 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.