title: Replacement therapy for congenital Factor X deficiency.
abstract: We studied a young woman with severe (less than 1%) congenital factor X deficiency during a 2-year period in order to document the levels of factor X required to provide hemostasis for vaginal bleeding, epistaxis, and hemarthroses, as well as during surgery. Factor X levels of 9 to 17 percent, achieved with fresh-frozen plasma (FFP) were satisfactory for minor bleeding. Hemostasis was achieved during emergency surgery for hemoperitoneum by increasing the factor X level to 35 percent with a Factor IX concentrate, followed with infusions of FFP to maintain levels between 10 and 20 percent for 6 days postoperatively. These data suggest that factor X levels of 10 to 20 percent are sufficient for hemostasis in factor X-deficient patients even in the immediate postoperative period.
mesh_terms: D000328:Adult; D001803:Blood Transfusion; D004844:Epistaxis / Q000628:therapy; D005171:Factor X Deficiency / Q000151:congenital / Q000628:therapy*; D005260:Female; D006395:Hemarthrosis / Q000628:therapy; D006465:Hemoperitoneum / Q000601:surgery; D006801:Humans; D007020:Hypoprothrombinemias / Q000628:therapy*; D008595:Menorrhagia / Q000628:therapy; D010949:Plasma