Ristocetin cofactor assay measures the ability of VWF in plasma to agglutinate platelets in the presence of Ristocetin. Ristocetin cofactor assay measures.

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Ristocetin cofactor assay measures the ability of VWF in plasma to agglutinate platelets in the presence of Ristocetin. Ristocetin cofactor assay measures the ability of VWF in plasma to agglutinate platelets in the presence of Ristocetin. The slope of the aggregation pattern is measured and the activity of VWF is determined from a calibration curve. (From Chrono-log VW Cofactor assay software, Chrono-Log Corporation, Havertown, PA). Larry J. Smith Clin Lab Sci 2017;30:65-74 © Copyright 2017 American Society for Clinical Laboratory Science Inc. All rights reserved.