In the past, in order to get enough
clotting factors, a person with
hemophilia had to be injected with large amounts of
the liquid part of blood (plasma).
Clotting factor concentrates have changed this by providing large
amounts of clotting factor in smaller doses. Clotting factor is collected from
donors or is produced in a lab (using recombinant
DNA technology) and concentrated into a powder form
that is then mixed with sterile water and injected.
One type of clotting factor (clotting factor VIII) is made to treat
hemophilia A, and one type is made to treat hemophilia B (factor IX).