To evaluate the prophylactic efficacy of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in patients with severe hemophilia A.
To evaluate the safety of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in patients with severe hemophilia A.
Secondary purpose:
To evaluate the efficacy of recombinant human coagulation factor Ⅷ-Fc fusion protein for injection (FRSW117) in hemostasis and surgical hemostasis in patients with severe hemophilia A.
To evaluate the pharmacokinetic (PK) characteristics of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in treated patients with severe hemophilia A.
To evaluate the immunogenicity of recombinant human coagulation factor Ⅷ-Fc fusion protein (FRSW117) for injection in treated patients with severe hemophilia A.
12≤ age ≤65 year-old men;
Patients with clinically confirmed severe hemophilia A, i.e. at screening (central laboratory testing) or previous medical records confirm: FⅧ activity < 1%；
Previous documented treatment with any recombinant and/or blood-derived coagulation factor Ⅷ products or cryoprecipitation products and dosed ≥150 exposure days (EDs≥150)
Normal prothrombin time (PT) or International Normalized Ratio (INR)<1.3
Known or suspected allergy to the investigational drug or its excipients, including mouse or hamster proteins;
Hypersensitivity or anaphylaxis after FⅧ or IgG2 injection in the past;
FⅧ inhibitor positive (≥0.6 BU/mL) during the screening period, or have a history of FⅧ inhibitor positive in the past, or a family history of FⅧ inhibitor positive;
Von Willebrand factor (vWF) antigen test results were lower than the lower limit of normal value;