Use

This test is useful as a reflex component of several coagulation consultation unit codes when results of complementary laboratory tests are low or discordant. It is primarily used to subtype von Willebrand disease (VWD), particularly to identify variants of type 2 VWD, and to aid in determining appropriate treatment. VWD is the most common hereditary bleeding disorder, characterized by quantitative or qualitative defects in von Willebrand factor (VWF), leading to easy bruising, mucocutaneous bleeding, and post-trauma or surgical bleeding.