Safety and efficacy of BAY 94-9027, an extended-half-life factor VIII, during surgery in patients with severe hemophilia A: Results of the PROTECT VIII clinical trial

Elena Santagostino, Shadan Lalezari, Mark T. Reding, Jonathan Ducore, Heng Joo Ng, Lone H. Poulsen, Lisa A. Michaels, Camila C.G. Linardi

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Introduction: Ensuring hemostasis during invasive procedures is a challenge in patients with severe hemophilia A. This analysis evaluated efficacy and safety of BAY 94-9027, an extended-half-life recombinant factor VIII (FVIII), in the surgical setting. Materials and methods: Patients participating in an open-label BAY 94-9027 clinical trial who underwent major surgery were included in the analysis. Investigator/surgeon assessment of hemostasis during surgery was the primary outcome. In addition, information about FVIII use, FVIII levels during perioperative period, bleeding complications and FVIII inhibitor development were collected. Results: Data were analyzed for 26 major surgeries (orthopedic, n = 21) in 20 patients aged 13–61 years. BAY 94-9027 provided effective hemostasis during all procedures. FVIII levels 6–8 h post preoperative infusion and prior to the first follow-up infusion were in the range expected to maintain protection in the major surgery setting. The median time from preoperative infusion to the first follow-up infusion (the first infusion administered after the preoperative infusion) was 12.33 (3.6–49.9) h. No intraoperative bleeding complications occurred, and no new inhibitors developed following any surgery. Conclusions: The results of the study demonstrate that BAY 94-9027 was efficacious and well tolerated in the treatment of patients undergoing major surgeries. Advantages of BAY 94-9027 include the potential for less frequent infusion and reduced factor consumption, which should simplify the management of patients during major surgery.

Original languageEnglish (US)
Pages (from-to)13-19
Number of pages7
JournalThrombosis research
StatePublished - Nov 1 2019
Externally publishedYes



  • Extended-half-life factor VIII
  • Hemophilia A
  • Recombinant protein
  • Surgery

ASJC Scopus subject areas

  • Hematology

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