Wilate use in 47 children with von Willebrand disease: the North London paediatric haemophilia network experience

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Children with von Willebrand disease (VWD) in whom DDAVP is ineffective or contraindicated require treatment with a coagulation factor concentrate containing von Willebrand factor (VWF) and factor VIII (FVIII). The aim of this study was to monitor the safety, efficacy and tolerability of Wilate® (a VWF:FVIII concentrate with a 1:1 ratio) used across the North London Paediatric Haemophilia Network since May 2010. In total, 47 children (aged 0.0–17.0 years) with type 1 (n = 28), type 2 (n = 7), type 3 (n = 10) and acquired VWS (n = 2) have been treated for bleeds, surgery and/or prophylaxis using 260 000 IU Wilate®. Analysis of dose and frequency of treatment show expected responses to treatment with mean doses of 55, 50 and 50 IU kg−1 for bleeds, surgery and prophylaxis respectively. Most bleeds responded to a single treatment. Surgical procedures were covered with clinician approved dosing schedules with 95% (39/41) reported as having excellent or good efficacy. There was no accumulation of FVIII or VWF and no thromboembolic events. This case series confirms the efficacy, safety and tolerability of Wilate® in neonates, children and adolescents when used on-demand, prophylactically and in the surgical setting.

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