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Read Important Information on Helixate® FS, Antihemophilic Factor (Recombinant)

Read Important Information on Helixate® FS, Antihemophilic Factor (Recombinant)

Monitor Factor VIII Activity Using Either the Chromogenic or One-stage Clotting Assay

Chromogenic assay
One-stage clotting assay

Use chromogenic assay if available to measure Factor VIII activity

  • Most accurately reflects the clinical hemostatic potential of AFSTYLA
  • Should be used if available

One-stage assay results can be used with a simple calculation

The one-stage clotting assay result underestimates the Factor VIII activity level compared to the chromogenic assay result by approximately one-half.

If the one-stage clotting assay is used, multiply the result by a conversion factor of 2 to determine the patient’s Factor VIII activity level.

One-stage assay results x 2 = Activity level
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