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DA Noe, WR Bell, PM Ness and J Levin
The plasma clearance rates of factors IX and VIII were determined in
patients with hemophilia A and B who had received factor replacement by
prolonged, continuous infusion of factor concentrates. The clearance rates
were calculated by dividing the factor infusion rates by the steady-state
plasma factor activities corrected for base-line factor activities. The
mean factor IX clearance rate in eight factor IX- deficient patients was
233 mL/h (range 159 to 340 mL/h). The mean normalized clearance rate was
3.4 mL/h/kg. The mean factor VIII clearance rate in eight factor
VIII-deficient patients was 294 mL/h (range 229 to 361 mL/h) and the mean
normalized rate was 5.0 mL/h/kg. Both factors show linear relationships
between the factor infusion rates and the steady-state plasma factor
activities achieved.
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| Copyright © 1986 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||