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Fibrinogen (Serum) with Bromocresol Green Method

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of fibrinogen, a protein in your blood that helps blood clot. It’s often checked when you have bleeding problems or if you’re at risk for clots.

Quick summary

["Fibrinogen helps control bleeding and prevents excessive clotting—levels can signal bleeding disorders or clotting risks."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
33131-4
Short code
GA from TC.Chitkara87
Synonyms
GA from TC.Chitkara87
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-estimated-from-tc-chitkara
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Matters

Fibrinogen is a key protein in your blood’s clotting process. Low levels may suggest bleeding disorders, while high levels could indicate conditions like inflammation or liver disease. Your doctor may order this test if you have symptoms like easy bruising, excessive bleeding, or a history of clots.

What to Expect Before the Test

No special preparation is needed, but avoid aspirin or other blood thinners for 48 hours before testing unless directed otherwise. You’ll provide a blood sample drawn from a vein in your arm.

What the Results Mean

Results help diagnose bleeding disorders (like hemophilia), liver disease, or inflammatory conditions. Your doctor will compare your results to your health history and other tests to interpret them accurately.

Common Conditions Monitored

Fibrinogen levels are checked in people with suspected bleeding disorders (e.g., von Willebrand disease), liver disease, or after trauma/surgery to assess clotting risk.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Fibrinogen’s Role in Health

Short name

Fibrinogen (Serum)

Frequently asked questions

What causes low fibrinogen levels?
Low fibrinogen can result from liver disease (since it’s produced in the liver), severe infections, pregnancy, or certain medications. It may also be inherited in bleeding disorders like hemophilia.
What causes high fibrinogen levels?
High fibrinogen is often linked to inflammation (e.g., rheumatoid arthritis), infections, or liver disease. It can also be a normal response to stress or injury.
Can diet affect fibrinogen levels?
Dietary factors like high-fat or processed foods may influence inflammation, indirectly affecting fibrinogen. However, diet alone won’t change your test results unless your doctor advises a specific diet for a condition like liver disease.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy