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Test Code FIBR Fibrinogen, LAB314


Clot Based Assay

Performing Laboratory

St. Luke's Hospital Cedar Rapids

Specimen Requirements


Preferred: Full blue-top (sodium citrate) 1.8mL tube-Hemolyzed or short draw specimen is not acceptable.

Specimen Volume: 0.5mL sodium citrate plasma

Stability: Centrifuged specimens at 18-24°C must be tested within 4 hours of specimen collection

Collection Instructions: Centrifuge immediately after draw. Forward promptly. If there is a delay in transport of ≤4 hours or if mailing time is ≤4 hours, send specimen refrigerated.  If testing not performed within 4 hours, plasma should be removed from cells and frozen at -20°C.

NOTE:  Patients with a hematocrit of >55% must be recollected using an altered amount of sodium citrate.

Reference Values

200-500 mg/dL

Critical value: <50 mg/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding


Useful For

A deficiency in fibrinogen is a rare occurrence, but when it does occur, it may produce severe hemorrhage.