Clinics and Departments

Laboratory Services

Lab Dept:

Coagulation

Test Name:

FIBRINOGEN ANTIGEN

General Information

Lab Order Codes:

FIBB

Synonyms:

Fibrinogen Ag; Factor 1 Antigen

CPT Codes:

85385 – Fibrinogen; Antigen

Test Includes:

Immunologic antigen determination reported in mg/dL.

Logistics

Test Indications:

Useful for identifying congenital afibrinogenemia, dysfibrinogenemia, disseminated intravascular coagulation (DIC), fibrinolytic activity and severe liver disease.

Lab Testing Section:

Coagulation - Sendouts

Referred to:

Fairview University Medical Center and Fairview forward to ARUP.
(Fairview test: FIBAG)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Daily, 24 hours

Turnaround Time:

2 - 4 days, Activity performed daily, 24 hours; Antigen performed twice weekly

Special Instructions:

N/A

Specimen

Specimen Type:

Whole blood

Container:

Light Blue top tube (Buffered Na Citrate 3.2%)

Draw Volume:

Minimum: 2.7 mL in a 3 mL tube

Processed Volume:

Specimen will be processed by the reference lab facility.

Collection:

Do Not use the first 2 mL’s of blood collected.

Patients with hematocrit levels >55% must have a special tube designed to adjust for the hematocrit. Contact lab for special tube.

Deliver specimen to lab immediately. Mix thoroughly by gentle inversion.

Special Processing:

Lab Staff: Do Not centrifuge. Send in original container. Specimen must arrive within 24 hours after collection. Protect from extreme temperatures during shipping.

Patient Preparation:

If the patient has a coagulation abnormality, apply direct pressure on the puncture site for 10 minutes; apply pressure bandage. Instruct the patient to leave the bandage on for 12 hours.

Sample Rejection:

Improper tube; clotted samples; underfilled tubes; overfilled tubes; mislabeled or unlabeled specimens

Interpretive

Reference Range:

Antigen:

149 – 353 mg/dL

Critical Values:

N/A

Limitations:

N/A

Methodology:

Fibrinogen Antigen: Radial immunodiffusion

References:

Fairview University Medical Center Web Page http://labguide.fairview.org/diagnostic.asp March 2014

Update:

3/18/2005: Change in Fibrinogen Antigen reference range, previously listed as 200 - 420 mg/dL.
5/24/2010: Tubing patient specimens is no longer prohibited.
3/28/2012: Updated Fibrinogen Ag ref range, now referred to ARUP. Updated Fibrinogen Activity Critical value.
3/26/2014: Fibrinogen activity no longer performed with this test.



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