Fibrinogen is a topic covered in the Davis's Lab & Diagnostic Tests.

To view the entire topic, please or purchase a subscription.

Davis’s Laboratory and Diagnostic Tests Online, powered by Unbound Medicine, provides nurses and students access to 400+ test monographs containing reference ranges, indications, patient preparation and result interpretation. Explore these free sample topics:


-- The first section of this topic is shown below --


Factor I.

Common Use:
Commonly used to evaluate fibrinolytic activity as well as identify congenital deficiency, disseminated intravascular coagulation (DIC), and severe liver disease.

Plasma collected in a completely filled blue-top (3.2% sodium citrate) tube. If the patient’s hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted.

Normal Findings:
(Method: Photo-optical clot detection)

AgeConventional UnitsSI Units (Conventional Units × 0.0294)
Newborn200–500 mg/dL5.9–14.7 micromol/L
Adult200–400 mg/dL5.9–11.8 micromol/L
Values are higher in older adults.

-- To view the remaining sections of this topic, please or purchase a subscription --