Fibrinogen Activity


Fibrinogen is essential for the formation of a blood clot. Deficiency can produce mild to severe bleeding disorders. Low fibrinogen levels can also cause thrombosis due to an increase in coagulation activity. Thrombosis refers to the formation of a blood clot inside of a blood vessel. The clot blocks the normal flow of blood through the circulatory system. This can lead to serious medical conditions such as heart attack and stroke.

Fibrinogen Activity


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  • Fasting Required: NO
  • Preferred Specimen: Plasma
  • Limitations: Expected impact by therapeutic levels (potential interference depends upon drug concentration): Warfarin: no effect; Heparin (UFH or LMWH): UFH-no effect, LMWH-normal to falsely low; Dabigatran or Argatroban (Thrombin Inhibitors): no effect or falsely low; Rivaroxaban or Apixaban (Factor Xa Inhibitors): no effect.
  • Reference Range(s): 175-425 mg/dL
  • Turnaround Time: 3 Days
  • Test Code: 461