title: Rapid assay for von Willebrand factor activity using formalin-fixed platelets and microtitration technic.
abstract: An inexpensive assay for von Willebrand factor using microtitration plates, formalin-fixed platelets, and ristocetin is described. With this technic, the assay for von Willebrand factor is simple enough to be considered for use in any diagnostic laboratory for patients with prolonged bleeding times.
mesh_terms: D001779:Blood Coagulation Factors / Q000032:analysis*; D001780:Blood Coagulation Tests; D001792:Blood Platelets / Q000032:analysis; D005169:Factor VIII / Q000032:analysis; D005260:Female; D005557:Formaldehyde; D006801:Humans; D008297:Male; D008722:Methods; D012310:Ristocetin; D014842:von Willebrand Diseases / Q000097:blood; D014841:von Willebrand Factor / Q000032:analysis*
chemical_list: D001779:Blood Coagulation Factors; D014841:von Willebrand Factor; D012310:Ristocetin; D005557:Formaldehyde; D005169:Factor VIII