"Evaluation of the Abnormal Platelet Function in von Willebrand Disease by the Blood Filtration Test."

According to the authors' abstract of an article published in Thrombosis and Haemostasis, "We have evaluated platelet function in different subtypes of von Willebrand disease (vWD) by pushing blood through the capillary-sized channels of a glass filter. Patients, including those with type IIB vWD, showed lower than normal platelet retention and increased cumulative number of blood drops passing through the filter as a function of time. In contrast, shear-induced platelet aggregation, measured in the cone-and-plate viscometer, was paradoxically increased in type IIB patients. Treatment with 1-desamino-8-D-arginine vasopressin (DDAVP) tended to normalize the filter test in patients with...

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