Health Encyclopedia

Fibrin degradation products

Definition

Fibrin degradation products (FDPs) are the substances left behind when clots dissolve in the blood. This article discusses the blood test to measure these products.

Alternative Names

FDPs; FSPs; Fibrin split products; Fibrin breakdown products

How the test is performed

The health care provider uses a needle to take blood from one of your veins. The blood collects into an airtight container. You may be given a bandage to stop any bleeding.

The laboratory specialist will run tests on the blood sample to measure the products that are left behind when blood clots dissolve.

How to prepare for the test

Your health care provider may tell you to stop taking certain drugs before the test. Drugs that may increase FDPs include barbiturates, heparin, streptokinase, and urokinase.

Do not stop taking any medicine without first talking to your doctor.

How the test will feel

When the needle is inserted to draw blood, some people feel moderate pain, while others feel only a prick or stinging sensation. Afterward, there may be some throbbing.

Why the test is performed

This test is done to see if your clot-dissolving (fibrinolytic) system is working properly. Your doctor may order this test if you have signs of disseminated intravascular coagulation (DIC) or another primary fibrinolytic disorder.

Normal Values

The result is normally less than 10 mcg/mL.

Note: mcg/mL = micrograms per milliliter

What abnormal results mean

Increased FDPs may indicate primary or secondary fibrinolysis (clot-dissolving activity) from such conditions as:

Abruptio placentae
Burns
Congenital heart disease
Disseminated intravascular coagulation (DIC)
Following cardiopulmonary (heart and lungs) pump surgery
Following massive blood transfusion
Hypoxia
Infections
Intrauterine fetal death
Leukemia
Liver disease (see cirrhosis)
Portacaval shunt
Preeclampsia
Renal disease (see kidney failure)
Septicemia
Thromboembolic states
Transplant rejection
Transfusion reaction

What the risks are

Excessive bleeding
Fainting or feeling light-headed
Hematoma (blood accumulating under the skin)
Infection (a slight risk any time the skin is broken)
Multiple punctures to locate veins

Special considerations

Veins and arteries vary in size from one patient to another, and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.

Review Date:3/9/2007
Reviewed By:Mark Levin, MD, Hematologist and Oncologist, Newark, NJ. Review provided by VeriMed Healthcare Network.

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