Best assay for deficiency of von Willebamd factor is:: (A) Bleeding time, (B) BT + APTT, (C) BT + APTT + vWF-ristocetin factor assay, (D) PT
Answer is C. Answer is C (BT + APTT + vWF-ristocetin factor assay) Estimation of BT, APTT and VWF-Ristocetin factor assay would provide the maximal information to aid a diagnosis of VWF disease (amongst the options provided)