Fibrinogen Level Interpretation

Reference Range and Clinical Context

Normal plasma fibrinogen concentration ranges from 2.0 to 4.0 g/L in healthy individuals, according to the Journal of Thrombosis and Haemostasis 1
Fibrinogen levels below 1.5-2.0 g/L indicate significant deficiency requiring intervention in bleeding scenarios, as stated by Critical Care and the Journal of Thrombosis and Haemostasis 3, 1
Levels <1.0 g/L are critically low, being the first coagulation factor to reach dangerous levels during massive hemorrhage, as reported by the Journal of Thrombosis and Haemostasis 1
The American College of Cardiology recommends maintaining fibrinogen levels >200 mg/dL (2.0 g/L) for effective hemostasis in trauma patients without liver disease, based on findings from the Journal of Hepatology 5, 4

In cirrhosis, fibrinogen levels <100 mg/dL (1.0 g/L) are associated with spontaneous and procedure-related bleeding, according to the Journal of Hepatology 5, 6, 4
The European Association for the Study of the Liver suggests that fibrinogen replacement thresholds in cirrhotic patients should be >120 mg/dL (1.2 g/L), as stated in the Journal of Hepatology 5, 6, 4

The Clauss method is the most frequently recommended laboratory technique for measuring fibrinogen concentration, as recommended by Critical Care and the Journal of Thrombosis and Haemostasis 3, 1
Fibrinogen functions as an acute phase reactant and elevates during inflammatory processes, with levels above 4.0 g/L considered elevated, according to Praxis Medical Insights 2