Fibrinogen Lvl (FBG)
Department: Coagulation
Test Synonym(s): LAB314, FBG, Fibrinogen Level
CPT Codes: 85384
Methodology: Clotting
Reference Range: 200 - 415 mg/dL
Tube Type: One 2.7mL Light blue top - 3.2% Sodium Citrate
Specimen: Citrated platelet poor plasma - Requires double centrifugation if sending a plasma aliquot. Aliquot(s) must be frozen if not received by lab within 4 hours of collection.
Alternate Specimen: None
Pediatric Requirements: Pediatric: One 2.7mL Light blue top - 3.2% Sodium Citrate. Neonatal: One 1.8mL Light blue top - 3.2% Sodium Citrate.
Volume: 1.0 mL plasma
Minimum Volume: 1.0 mL plasma
Temperature: Room Temperature for Light blue top tube, must be received within 4 hours of draw. Plasma aliquot(s) must be frozen if not received by lab within 4 hours of collection.
Stability: Room temperature: 4 hours, Frozen: -70° C for one month
Reasons for Rejection: Clotted sample, incorrectly filled tubes, incorrect tube type, grossly hemolyzed sample, grossly lipemic sample, grossly icteric sample, whole blood >4.0 hours old
Days Performed: Daily
Times Performed: Continuous
TAT: 2 hours, once received into lab
Significance: At fibrinogen levels < 150 mg/dL, very high levels of circulating fibrin degradation products (such as those seen in thrombolytic therapy) may interfere with the accurate measurement of fibrinogen.
Special Instructions: The Fibrinogen test can have its results falsely lowered by Dabigatran or Argatroban. Collect partial waste tube if using butterfly device. Do not send on ice. Deliver to lab immediately.
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