pharmacokinetic study of advate 3000 iu in previously treated patients with severe hemophilia a

Conditions: Hemophilia A

Summary: the objective of this clinical study is to compare the pharmacokinetic parameters of 3000 iu advate using one 3000 iu potency vial dissolved in 5 ml diluent with that of 3000 iu advate using two vials of 1500 iu potency dissolved in 5 ml diluent each (administered in 10 ml diluent in total) in previously treated patients with severe hemophilia a (factor viii level \< 1%).


Eligibility criteria:
inclusion criteria: * participant is 18 to 65 years old, at the time of screening * participant has provided signed informed consent * participant has severe hemophilia a, defined by a baseline fviii level \< 1% of normal, as tested at screening at the central laboratory * participant's weight is between 55-65 kg * participant was previously treated with fviii concentrate(s) for a minimum of 150 exposure days prior to study entry * if participant is hiv positive, he must be immunocompetent as determined with a cd4 count ≥ 200 cells/mm³ (cd4 count at screening) * participant is willing and able to comply with the requirements of the protocol exclusion criteria: * participant has a detectable fviii inhibitor at screening, with a titer ≥ 0.4 bethesda unit (bu) (nijmegen modification of the bethesda assay) measured at the central laboratory * participant has a history of fviii inhibitors with a titer ≥ 0.4 bu (by nijmegen assay) or ≥ 0.5 bu (by bethesda assay) at any time prior to screening * participant has undergone a surgery within 21 days prior to screening or within 6 weeks prior to the anticipated first pharmacokinetics(pk) infusion * participant has an abnormal renal function (serum creatinine \> 1.5 mg/dl) * participant has active hepatic disease (alanine aminotransferase (alt) or aspartate aminotransferase (ast) levels \>5 times the upper limit of normal) * participant has severe chronic liver disease as evidenced by, but not limited to, any of the following: international normalized ratio (inr) \> 1.4, hypoalbuminemia, portal vein hypertension including presence of otherwise unexplained splenomegaly, and history of esophageal varices * participant has clinical and/or laboratory evidence of abnormal hemostasis from causes other than hemophilia a (eg, late-stage chronic liver disease, immune thrombocytopenia purpura) * participant is currently receiving, or is scheduled to receive during the course of the clinical study, an immunomodulating drug other than anti-retroviral chemotherapy (eg, alfa-interferon, or corticosteroid agents at a dose equivalent to hydrocortisone greater than 10 mg/day) * participant has a known hypersensitivity to mouse or hamster proteins * participant has participated in another clinical study involving an investigational product or investigational device within 30 days prior to enrollment or is scheduled to participate in another clinical study involving an investigational product or investigational device during the course of this clinical study * participant is identified by the investigator as being unable or unwilling to cooperate with study procedures * participant is a member of the team conducting this clinical study or is in a dependent relationship with one of the study team members. dependent relationships include close relatives (ie, children, partner/spouse, siblings, or parents) as well as employees of the investigator or site personnel conducting the clinical study.