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- W1994744646 abstract "Summary. Background: The pharmacokinetics of factor VIII replacement therapy in preschool previously treated patients (PTPs) with hemophilia A have not been well characterized. Objectives: To assess the pharmacokinetics, efficacy and safety of a plasma-free recombinant FVIII concentrate, ADVATE [Antihemophilic Factor (Recombinant), Plasma/Albumin-Free Method, rAHF-PFM], in children < 6 years of age with severe hemophilia. Patients/methods: Fifty-two boys, one girl, mean (± SD) age 3.1 ± 1.5 years and ≥ 50 days of prior FVIII exposure, were enrolled in a prospective study of ADVATE rAHF-PFM at 23 centers. Results: The mean terminal phase half-life (t1/2) was 9.88 ± 1.89 h, and the mean adjusted in vivo recovery (IVR) was 1.90 ± 0.43 IU dL−1 (IU kg−1)−1. Over the 1–6-year age range, t1/2 of rAHF-PFM increased by 0.40 h year−1. IVR increased by 0.095IU dL−1(IU kg−1)−1 (kg m−2)−1 in relation to body mass index (BMI). Patients primarily received prophylaxis. Median (range) annual joint bleeds were 0.0 (0.0–5.8), 0.0 (0.0–6.1) and 14.2 (0.0–34.5) for standard prophylaxis, modified prophylaxis and on-demand treatment, respectively. Bleeds were managed in 90% (319/354) of episodes with one or two rAHF-PFM infusions; response was rated excellent/good in 93.8% of episodes. Over a median 156 exposure days, no FVIII inhibitors were detected and no related severe adverse events or unusual non-serious adverse events were seen. Conclusions: Children < 6 years of age appear to have shorter FVIII t1/2 and lower IVR values than older subjects. However, these parameters increased with age (t1/2) and BMI (adjusted IVR), respectively. rAHF-PFM was clinically effective and well tolerated, with no signs of increased immunogenicity in previously treated young children with hemophilia A." @default.
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- W1994744646 date "2008-08-01" @default.
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- W1994744646 title "Plasma and albumin‐free recombinant factor VIII: pharmacokinetics, efficacy and safety in previously treated pediatric patients" @default.
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- W1994744646 doi "https://doi.org/10.1111/j.1538-7836.2008.03032.x" @default.
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