Medical Technology


Factor Molecular Weight Functional Activity Biologic Half-Life Site of Production Vitamin K Dependent Plasma Concentration
Fibrinogen 340,000 --------- 90 hrs. Liver No 300-400mg/dL
Prothrombin 72,000 Serine Protease 60 hrs. Liver Yes 10-15 mg/dL
Factor V 330,000 Cofactor 12-36 hrs. Liver No 0.5-1.0 mg/dL
Factor VII 48,000 Serine Protease 4-6 hrs. Liver Yes 0.1 mg/dL
Factor VIII:C 70-240,000 Cofactor 12 hrs. Liver (?) No 1-2 mg/dL
Factor IX 57,000 Serine Protease 20 hrs. Liver Yes 4 µg/mL
Factor X 58,000 Serine Protease 24 hrs. Liver Yes 0.75 mg/dL
Factor XI 160,000 Serine Protease 40 hrs. Liver No 1.2 mg/dL
Factor XII 80,000 Serine Protease 48-52 hrs. Liver No 0.4 mg/dL
Prekallikrein 80,000 Serine Protease 48-52 hrs. Liver No 0.29 mg/dL
High Molecular Weight Kininogen 120,000 Cofactor 6.5 days Liver No 0.70 mg/dL
Factor XIII 320,000 Trans Glutaminase 3-5 days Liver No 2.5 mg/dL
Protein C 62,000 Serine Protease 8-12 hrs. Liver Yes 4-5 µg/mL
Protein S 84,000 Cofactor -------- Liver Yes 25 mg/L

Hemostasis Fig. 2: Characterisctics of Coagulation Factors

Hematology/Hemostasis

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