QA4 Factor assays

This package consists of 8 surveys per year. Two samples for Factor VIII and one for Factor IX assay are dispatched on a six weekly basis. Assays for other coagulation factors (e.g. X, XII) are provided at less frequent intervals at no extra charge.

Within the cost of this package, participants may also register for von Willebrand Factor Antigen and, if performed in the laboratory, Ristocetin Co-Factor. Three samples for von Willebrand Factor Antigen and, if required, 3 for Ristocetin Co-Factor are dispatched every 12 weeks with a 4 week closing date to allow for batch testing.

Report issued within 7 days of closing date.

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