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Fibrinogen

Fibrinogen Level Clauss Fibrinogen Factor I
Sodium citrate (blue top) g/L

About this test

Key clotting substrate converted to fibrin by thrombin. Measured by Clauss method. Also a positive acute-phase reactant. Reduced in DIC, liver failure, afibrinogenaemia.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs 1.5 – 4 Adult; inflammatory state: may be >4 (acute phase)

Clinical Interpretation

Low / Decreased
Hypofibrinogenaemia — DIC (consumptive), liver failure, fibrinolytic therapy (tPA), congenital afibrinogenaemia.
High / Increased
Elevated fibrinogen — inflammatory/acute-phase reaction, pregnancy, CVD risk marker.

Related Tests

D-Dimer
Specimen
Sodium citrate (blue top)
Reporting Unit
g/L
Category
🩹 Coagulation

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.