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Fibrinogen (089-0038)
Test Mnemonic:


Specimen Requirements:



Blue-topped (3.2% sodium-citrate) tube. Routine venipuncture; discard 1st mL of blood by collecting a discard tube prior to collecting the blue-topped (3.2% sodium-citrate) tube.  For collections with butterfly blood collection sets, a discard tube should also be collected prior to collection of the blue top to ensure sufficient sample volume. Drawing a discard tube will displace the air from the blood collection set tubing to ensure proper blood draw volume. 


Blue-topped (3.2% sodium-citrate) tube


Viable for 4 hours at room temperature. If time from draw to receipt in lab is to be greater than 4 hours, centrifuge the sample, separate the plasma from cells, and freeze the plasma.

Specimen Preparation:

Centrifuge the specimen for 15 minutes at 2000-2500g


Whole blood 4 hours at room temperature.  Plasma storage: 8 hrs at 20 +/- 5 oC.  1 month at -20oC.  


Causes for Rejection:

QNS, clotted, severe hemolysis, specimen greater than 4 hours old, worng tube (3.8% sodium citrate), high hematocrit (>55%), identification error, improper processing/ storage/ transport.

Reference Range:

214 - 470 mg/dL

Galveston & Clear Lake Campus: 167 - 453 mg/dL


Turnaround Time:

STAT 1 hour, Routine: 4 hours


Electromagnetic Viscosity Detection

Galveston and Clear Lake Campus: Optical Density


Samples are accepted 24 hours



CPT 4 Code:


When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.
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