Skip to content

Fibrinogen (Serum) with Bromocresol Green Method

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

This test measures the amount of fibrinogen in your blood serum, a protein essential for blood clotting. It helps assess your risk of bleeding disorders or clotting issues.

Quick summary

["Fibrinogen levels can indicate how well your blood can clot normally."]

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

Key facts at a glance

LOINC
50750-9
Short code
F13A1 p.V34L Bld/T Ql
Synonyms
F13A1 p.V34L Bld/T Ql
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test to evaluate blood clotting function, diagnose conditions like liver disease (which can affect fibrinogen production), or monitor treatment for bleeding disorders. It’s also used in certain surgical or high-risk medical procedures to check clotting readiness.

What to Expect Before the Test

No special preparation is needed, but avoid strenuous activity 24 hours before. If you’re on blood thinners, check with your doctor first. The test is typically done by drawing blood from a vein in your arm.

What Happens During the Test?

A healthcare provider will clean your arm, insert a needle to draw blood into a tube, and apply pressure afterward to stop bleeding. The blood sample is sent to a lab for analysis using the bromocresol green method to measure fibrinogen levels.

What Are Normal Results?

Results are not provided with specific numeric ranges here, as they vary by lab and patient factors. Your doctor will interpret the results in relation to your health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Fibrinogen (Serum) BCG

Frequently asked questions

How long does it take to get my test results?
Results are usually available within 1–3 business days, depending on your lab. Follow-up with your doctor to discuss the findings and next steps.
Can I eat or drink before this test?
You can eat and drink normally unless instructed otherwise by your doctor. Avoid alcohol 24 hours before the test if it may affect blood clotting.
Does this test require fasting?
No fasting is required for this test. However, if you have other blood tests scheduled, check with your provider to ensure consistency in results.
  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