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- W4220879355 abstract "As the most commonly used FVIII concentrate in China, the individualized pharmacokinetics (PK) and clinical outcomes of Kovaltry (BAY81-8973) are not fully investigated in this population.Pediatric patients with severe hemophilia A were enrolled in Beijing Children's Hospital. After a three-day washout, they received PK tests after a single-dose infusion of 50 IU/kg. The blood samples were collected with a six-point assay. One-stage-based activated partial thromboplastin time was used for FVIII activity. The PK parameters were generated by WinNonlin software. The bleeding rates were calculated by their routine therapy record. The ultrasound was used to evaluate their both sides of knees, elbows and ankles.Sixty-one boys with severe hemophilia A were enrolled and their median age was 5.73 years. Twenty-nine of them were blood group-O. Compared with blood group-O patients, those non-O patients showed longer t1/2 (15.26 vs. 13.03 h, P < 0.001) and reduced CL (3.04 vs. 3.66 mL/kg/h, P < 0.05). Patients with higher VWF:Ag level had longer half-life time (t1/2) (r = 0.60, P < 0.0001) and lower clearance (CL) (r = -0.45, P < 0.001). Patients with higher trough level showed decreased bleeding rates compared with those owning a trough level below 1 IU/dL (P < 0.05). In general, the zero bleeding rates raised with elevation of trough level. However, 20-30% of patients with low trough level (<1 IU/dL) also showed no bleeds and 10-20% of patients with high trough level (>5 IU/dL) still suffer bleeds. An inconsistency of 28% between joint bleeds and ultrasound evaluation was showed.This study revealed the great inter-individual variability in PK parameters, clinical bleeding phenotype and joint vulnerability, which all should be considered in treating hemophilia A." @default.
- W4220879355 created "2022-04-03" @default.
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- W4220879355 date "2022-05-01" @default.
- W4220879355 modified "2023-10-17" @default.
- W4220879355 title "Inter-individual variability in pharmacokinetics and clinical features in pediatric patients with severe hemophilia A" @default.
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- W4220879355 doi "https://doi.org/10.1016/j.thromres.2022.03.008" @default.
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