Quick answer
The Fibrinogen Test costs ₹1,000 at Live Line Health Care. Measures fibrinogen, the protein that forms the mesh of a blood clot. No fasting is needed. It uses a blood sample and the report is usually ready within 24 hours. Book home sample collection or visit any of our 45 centres.
Also known as: Plasma Fibrinogen, Serum Fibrinogen, Fibrinogen Level, Fibrinogen Activity, Factor I
What is the Fibrinogen Test?
The fibrinogen test measures how much of this clotting protein is in your plasma. Fibrinogen, also called factor I, is made in the liver and is the raw material of every blood clot. At the last step of clotting, an enzyme called thrombin turns fibrinogen into strands of fibrin, which weave through platelets to form a strong mesh. If there is too little fibrinogen, or if it does not work properly, clots can be weak and bleeding can continue.
Doctors usually ask for it when bleeding is hard to explain or when PT and APTT are long. It is especially useful in serious illness, as DIC can use up fibrinogen rapidly, and in heavy bleeding after childbirth, where a falling level warns of worsening haemorrhage. It is also checked in severe liver disease. A level that is too high has a different meaning. Fibrinogen is an acute phase protein, so it rises with infection, inflammation, smoking and pregnancy, and long-term high levels are linked with heart disease and clots. Most people never need this test, so it is normally requested by a doctor for a specific reason.
What it measures: The concentration of fibrinogen (factor I) in your plasma, in mg/dL.
Parameters included (1)
- Plasma Fibrinogen (mg/dL)
Why is this test done?
- Investigating unexplained bleeding or long PT and APTT results
- Assessing DIC, along with platelets, PT/INR and D-dimer
- Checking how severe liver disease is affecting clotting
- Looking for an inherited low or abnormal fibrinogen in a family
- Guiding care in heavy bleeding after childbirth or major surgery
- Monitoring treatments that lower fibrinogen, such as L-asparaginase chemotherapy or clot-dissolving medicines
When should you get tested?
- Bleeding that seems out of proportion to an injury or surgery
- A prolonged PT or APTT on an earlier report
- Repeated miscarriages along with abnormal clotting tests
- A family member with a known fibrinogen disorder
- Severe infection or liver disease, when your doctor has requested it
How to prepare for the Fibrinogen Test
- 1You do not need to fast or change your meals for this test.
- 2Tell staff about any blood transfusion or plasma product in the past few weeks, as these contain fibrinogen.
- 3Mention blood thinners, clot-dissolving treatment, chemotherapy or oestrogen-containing pills.
- 4If you are pregnant, tell staff how many weeks along you are, because fibrinogen rises through pregnancy.
Fibrinogen Test normal range
| Parameter | Typical reference range |
|---|---|
| Adults | 200–400 mg/dLthe same as 2.0–4.0 g/L |
| Late pregnancy | About 370–620 mg/dLhigher than the non-pregnant range |
| Markedly low | Below 100 mg/dLraises concern for bleeding and needs urgent medical review |
A value that looks normal for a non-pregnant adult can be low for late pregnancy, which is why doctors read it against the stage of pregnancy. Ranges are typical adult values and vary between labs, age and sex. Always use the range printed on your report and discuss results with your doctor.
Understanding your results
- Low fibrinogen can come from being used up too fast, as in DIC or major bleeding, from poor production in advanced liver disease, or from an inherited condition.
- In DIC, doctors expect low fibrinogen alongside low platelets, high D-dimer and prolonged clotting times. This is an emergency managed in hospital.
- A high fibrinogen often reflects infection, inflammation, smoking or pregnancy. It usually settles as the cause resolves and does not need treatment by itself.
- Because it rises during inflammation, a normal value in a very sick patient may hide a falling trend, so your doctor may repeat it to watch the direction.
- Sometimes the amount of protein is normal but it does not work properly. This rare condition, called dysfibrinogenaemia, needs specialist tests.
Fibrinogen Test – FAQs
What is the price of the Fibrinogen Test?
The Fibrinogen Test costs ₹1,000 at Live Line Health Care, at all 45 centres and for home sample collection.
What does low fibrinogen mean?
It means there may be too little raw material to build a strong clot. Common causes are DIC, major bleeding, severe liver disease and, rarely, an inherited condition. Some medicines also lower it. A very low level, especially with bleeding, needs urgent hospital assessment, where replacement can be given if needed.
What does high fibrinogen mean?
Most often it is a response to something else, such as infection, inflammation, smoking or pregnancy. Long-term high levels are linked with heart disease and clots, but this test is not used alone to judge that risk. Your doctor will focus on finding and treating the underlying cause.
How is fibrinogen different from fibrin?
Fibrinogen is the soluble protein that circulates in your blood. During clotting, thrombin converts it into fibrin, the sticky strands that hold a clot together. This test measures fibrinogen, the starting material, while a D-dimer test looks at fragments left over after fibrin breaks down.
Why is fibrinogen checked after childbirth bleeding?
Fibrinogen falls quickly with heavy bleeding, and a low level after childbirth warns that bleeding may become more severe. Hospitals use it to guide urgent replacement. Heavy bleeding after delivery is an emergency, so go to the hospital immediately rather than booking a test.
Is fibrinogen part of the PT or APTT?
It is not reported by them, but both depend on it. They need enough working fibrinogen to form a clot, so a very low level can prolong either one. This test gives the actual amount, which helps your doctor work out why a PT or APTT is long.
Can a fibrinogen test predict heart disease?
High fibrinogen is linked with higher heart risk in large studies, but it is not a routine screening test. Doctors rely more on blood pressure, cholesterol, blood sugar, smoking and family history. If you are concerned about your heart, ask your doctor which checks suit you.
Where can I get the Fibrinogen Test done?
At any of our 45 Live Line Health Care centres in 40 cities across Andhra Pradesh and Telangana, including Hyderabad, Visakhapatnam, Warangal, Kakinada and Nellore, or book home sample collection.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.