Ristocetin cofactor assay

Measures the ability of a patient’s plasma to agglutinate formalin fixed platelets in the presence of ristocetin.

The rate of ristocetin induced agglutination is related to the concentration of Von Willebrand factor, and the percent normal activity is obtained from a standard curve.

Values are determined by comparison to a standard curve, which allows quantization of percent ristocetin cofactor activity.

Leave a Reply

Your email address will not be published. Required fields are marked *