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Fibrinogen Degradation Products (FDP) in Blood

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

This test measures small fragments of fibrin, which form when blood clots break down. It helps assess your risk of excessive bleeding or clotting disorders.

Quick summary

["Fibrin degradation products indicate whether your body is breaking down clots too quickly or forming abnormal clots."]

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

Key facts at a glance

LOINC
39154-0
Short code
FFDM Brst-Bl Dx
Synonyms
FFDM Brst-Bl Dx
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
mg-ffd
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

What Does This Test Measure?

Fibrinogen is a protein in your blood that helps form clots. When clots dissolve, they release tiny fragments called fibrin degradation products (FDPs). This test detects these fragments to check if your body is breaking down clots abnormally.

Why Might You Need This Test?

Doctors may order this test if you have symptoms like excessive bleeding, unexplained bruising, or signs of clotting problems. It can also be used during pregnancy to monitor clotting risks or after surgery to prevent excessive bleeding.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm or vein to draw blood. If you’re on blood thinners, let your doctor know before the test.

What Are the Possible Results?

Results are not given in a single number range since they depend on clinical context. High levels may suggest recent clot formation or breakdown, while low levels could indicate bleeding disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

FDP Blood Test

Frequently asked questions

What Are Common Causes of Abnormal Results?
High levels of FDPs can be caused by conditions like disseminated intravascular coagulation (DIC), severe infections, or certain cancers. Low levels may occur with bleeding disorders or excessive anticoagulant use.
How Often Should This Test Be Done?
This test is typically done as needed based on your symptoms or medical condition. Your doctor will determine the best timing and frequency for follow-up.
Can I Avoid This Test?
If you have symptoms related to clotting or bleeding, your doctor may recommend this test to guide treatment. Avoiding it could delay necessary diagnosis and care.
  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