Semin Thromb Hemost 2006; 32(5): 456-471
DOI: 10.1055/s-2006-947859
Copyright © 2006 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA.

Laboratory Identification of von Willebrand Disease: Technical and Scientific Perspectives

Emmanuel J. Favaloro1
  • 1Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR), Westmead Hospital, Westmead, New South Wales, Australia
Further Information

Publication History

Publication Date:
24 July 2006 (online)

ABSTRACT

The correct diagnosis and classification of von Willebrand disease (von Willebrand disorder; vWD) is crucial because the presenting biological activity of von Willebrand factor (vWF) determines both the hemorrhagic risk and subsequent clinical management. Many laboratory assays are employed, given that assay limitations and vWD heterogeneity results in no single test being able detect all forms of vWD. Minimal laboratory identification requires assessments of vWF:antigen, factor (F) VIII:coagulant activity, and functional vWF (using vWF:ristocetin cofactor activity and vWF:collagen-binding activity). Tests to help subclassify vWD include ristocetin-induced platelet aggregation, vWF:multimers, and vWF:FVIII binding assays. New diagnostic developments are now influencing vWD diagnosis, including advancements in methodologies, automation, new platelet function analyzers, genetic mutational analysis, and a better understanding of therapeutic pharmacokinetics. This review focuses on the current recommended laboratory process for investigation of vWD from a practical scientific technical laboratory perspective. Selection of appropriate combination test panels and testing sequence is crucial for the proper diagnosis and classification of congenital vWD.

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 Dr.
Emmanuel J Favaloro

Department of Haematology, Institute of Clinical Pathology and Medical Research (ICPMR)

Westmead Hospital, SWAHS, Westmead, NSW 2145, Australia

Email: emmanuel@icpmr.wsahs.nsw.gov.au

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