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Von Willebrand Factor

Von Willebrand disease (vWD) is one of the most common inherited bleeding disorders. In recent years, there have been major advances in our understanding of vWD, which is caused by quantitative and/or qualitative problems with von Willebrand factor (vWF).

To evaluate and confirm problems with von Willebrand factor (vWF) or to monitor vWF therapies, we offer several assay kits along with stand alone assay components such as ristocetin, lyophilized platelets, vW normal reference plasma and, vW normal, and vW abnormal control plasmas.

In addition, we have developed and provide the only complete assay system for von Willebrand Factor activity assessment. Our vW Select®, Ristocetin CoFactor Assay system is CLIA compliant, achieves linear standard reference curves more easily, and includes all required reagents, controls, reference plasmas, and diluents in order to help achieve cost-effective, consistent, and reliable analytical results.

Quick Facts

  • Screen for Von Willebrand Disease
  • Quantify measurement of Ristocetin CoFactor Activity
  • Confirm diagnosis of Type IIB vWD
  • Monitor response to factor concentrate therapy
  • Measure inflammatory response

vW Select is a Ristocetin CoFactor Assay System comprised of optimized reagents, control plasmas, and lot specific technical information for use in the detection of von Willebrand Disease (vWD)...

The vW Factor Assay® is a system of reagents and control plasmas for the evaluation of von Willebrand Syndrome.

von Willebrand Factor Normal Control Plasma is a lyophilized citrated human plasma which has been verified for a von Willebrand Factor activity level of 80 to 120 percent...

von Willebrand Factor Abnormal Control Plasma is lyophilized citrated human plasma which has been selectively depleted of von Willebrand Factor.

von Willebrand Factor Normal Reference Plasma is lyophilized human plasma standardized using World Health Organization reference material to give consistent 90 - 110% of von Willebrand factor activity...