title: [Use of frozen thrombocytes for the determination of von willebrand factor with the aid of ristocetin].
abstract: The quantitative assay of von Willebrand factor using ristocetin aggregation is simplified and improved by the use of frozen normal platelets. The main advantages of the method described are excellent reproducibility, maintenance of a stable optimal pH and the possibility of eliminating interfering factors, such as inhibitors, by dilution.
mesh_terms: D001769:Blood; D001779:Blood Coagulation Factors / Q000032:analysis*; D001792:Blood Platelets / Q000187:drug effects*; D005615:Freezing; D006801:Humans; D006863:Hydrogen-Ion Concentration; D010974:Platelet Aggregation / Q000187:drug effects; D012310:Ristocetin / Q000494:pharmacology*; D014842:von Willebrand Diseases / Q000097:blood; D014841:von Willebrand Factor / Q000032:analysis*
chemical_list: D001779:Blood Coagulation Factors; D014841:von Willebrand Factor; D012310:Ristocetin
vernacular_title: Die Verwendung gefrorener Thrombozyten für die Bestimmung des Von-Willebrand-Faktors mit Ristocetin.