Biochemical and in vivo properties of commercial virus‐inactivated factor VIII concentrates

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Abstract
The following commerical virus-inactivated factor VII concentrates were studied in vitro: AHF-Kabi and Onctonativ, KabiVitrum; Hemofil T, Hyland; Factorate HP and Monoclate, Armour; Nordiocto, Nordisk Gentofte (dry heated); Kryobulin TIM3, Immuno (steam treated); Profilate, Alpha (heated as dry material slammed in heptane); Hemate P. Behring (wet heated) and Octa-V.I., Octapharma (solvent/detergent treated). The concentration of VIII:C was lowest in AHF-Kabi, whereas it ranged from 24 to 53 IU/ml in the high purity concentrates, except for Monoclate in which it ranged from 91-128 IU/ml. All concentrates but Octa-V.I. had higher values for VIII:Ag than for VIII:C. von Willebrand factor with normal distribution of multimers could only be demonstrated in AHF-Kabi and Hemate P. In vivo studies were performed in 12 severe hemophiliacs. Recovery and half-life of VIII:C did not differ between the various concentrates. Hemate P was given to 5 patients with severe von Willebrand''s disease, in all of whom a correction of the hemostatic defect was seen.