Fibrinogen Activity
Fasting Required: No

Specimen: Blood

Lab: Quest Diagnostics

Results: Test run Wed & Fri only; Report available in 3 business days

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

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.

Description: Used to detect suspected bleeding disorders or abnormal blood clotting. Fibrinogen is often significantly increased in conditions involving tissue damage, infection, or inflammation. Increased levels may be seen in smokers, during pregnancy, and in women taking oral contraceptives. Fibrinogen levels can be diminished in advanced liver disease.

Alternative Name(s): Factor I