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D-Dimer Test
Also Known As : D-Dimer Quantitative, Citrated Plasma
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Brief Details
What Is a D-Dimer Test?
The D-dimer test measures the amount of a protein fragment called D-dimer in your blood. This fragment is produced when a blood clot dissolves naturally in your body. A venous blood sample is collected into a 3.2 % sodium-citrate tube for analysis. The D-dimer test helps doctors detect blood clotting disorders and rule out serious conditions, like deep vein thrombosis (DVT) and pulmonary embolism (PE).
Frequently asked questions
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D Dimer test must be taken to rule out clotting (thrombotic) episodes and to help diagnose conditions linked to thrombosis.
D-dimer testing is often recommended when someone shows symptoms of a serious condition like chest pain and breathing difficulty.
It is also ordered when someone has symptoms of deep vein thrombosis, such as:
- Leg pain or tenderness, mainly in one leg
- Leg swelling
- Discoloration of the leg
Or symptoms of pulmonary embolism such as:
- Sudden shortness of breath, laboured breathing
- Coughing, haemoptysis (presence of blood in sputum)
- Lung-related chest pain
- Rapid heart rate
When a blood vessel or tissue is injured and starts to bleed, a process called haemostasis is started by the body to create a blood clot to restrict and eventually stop the bleeding. This process produces fibrin threads which is a protein which links with the haemostasis to form a fibrin net. That net along with the platelets, helps hold the creation blood clot in place at the injury until the wound is healed.
Once the injury is healed and a clot is no longer needed, the body uses plasmin, an enzyme to break the thrombus (clot) into small pieces so that it can be removed. The pieces of the disintegrating fibrin in the clot are called fibrin degradation products (FDP), which consist of variously sized pieces of crosslinked fibrin. One of the final fibrin degradation products produced is D-dimer. The level of D-dimer in the blood can significantly rise when there is a critical formation and breakdown of fibrin clots in the body.
For a person who is at low or intermediate risk for blood clotting and/or thrombotic embolism, the strength of the D-dimer can help determine the strength of the fibrin and if needed, the person can be hospitalised.
This test is useful in the diagnosis of Disseminated intravascular coagulation and fibrinolysis (DIC), Deep Vein Thrombosis (DVT) & pulmonary embolism (PE) and also in stroke.
The test measures the levels of D-Dimer in the blood.
This test requires a blood sample. A tourniquet (elastic) band is placed tightly on the upper arm. The patient is then asked to make a fist. This helps in the build-up of blood filling the veins. The skin is disinfected before needle insertion and the blood sample is collected in vacutainer.
Elevated D-dimer is seen in hypercoagulability, DVT (Deep Vein Thrombosis, DIC (Disseminated Intravascular Coagulation),
recent surgery, trauma or infection.
False Positive may occur in the elderly, in liver disease, pregnancy, eclampsia, Heart disease, rheumatoid arthritis, and in some cancers, triglycerides, hemolysis,lipemia, hyperbilirubinemia etc.
False Negative may occur in patients on anticoagulant therapy
- Fragment D-dimer test
- Fibrin degradation fragment test
The D Dimer test is a blood test that measures the levels of D-Dimer protein fragments, which are produced when a blood clot breaks down. It helps rule out the presence of serious blood clots.
Yes, D Dimer tests can produce false positives. High D Dimer levels can be caused by conditions other than blood clots, such as infection, heart attack, liver disease, cancer, recent surgery, trauma, pregnancy, or advanced age.
The D Dimer test, or the D Dimer blood test, detects the levels of D Dimer protein fragments in the blood, which are indicative of blood clot formation and breakdown. High levels may suggest the presence of conditions like DVT, PE, DIC, or other clotting disorders.
Yes, the D Dimer test can help rule out pulmonary embolism (PE). However, a positive result does not confirm PE and requires further diagnostic tests to confirm the presence of a clot in the lungs.
A negative D Dimer Test result indicates that a blood clot is highly unlikely. A positive result suggests the possibility of a blood clot or other conditions, but further testing is needed to confirm the diagnosis.
High D-Dimer levels indicate possibility of a blood clot or other clotting disorders. Your healthcare provider will likely order additional tests, such as imaging studies, to determine the exact cause and location of the clot.
The D Dimer test is quick, non-invasive, and helps rule out DVT and PE, especially in patients with low to moderate risk. It can also be used to monitor the effectiveness of treatment for conditions like DIC.
Yes, pregnancy can cause elevated D-Dimer levels due to physiological changes and increased coagulability during pregnancy. This should be considered when interpreting the D Dimer test or D Dimer blood test results.
Symptoms associated with high D Dimer levels can include leg swelling, pain, or redness (DVT); trouble breathing, coughing, fast heartbeat, chest pain (PE); severe muscle and abdominal pain, bleeding gums, nausea, vomiting (DIC); and other symptoms depending on the underlying condition.
A rise in D-Dimer levels can be caused by blood clots (DVT, PE), disseminated intravascular coagulation (DIC), heart attack, liver disease, cancer, infection, recent surgery, trauma, pregnancy or recent childbirth, advanced age, smoking, and obesity.
No specific preparation, such as fasting, is typically required before the D Dimer test. However, it is important to follow any instructions given by your healthcare provider.
D Dimer test results are usually available after 4 hours, although this can vary based on the healthcare provider and the time/day the sample is collected and processed.
The D-dimer normal range is typically below 0.5 µg/mL FEU (Fibrinogen Equivalent Units). However, reference ranges can vary slightly depending on the lab and testing method used. Your doctor will interpret your results based on your specific health conditions.
A D-dimer test does not directly diagnose a heart attack or a stroke. However, D-dimer test normal levels may be elevated in these conditions due to the associated clotting and inflammation. Additional testing is necessary for a definitive diagnosis.
No, fasting is not usually necessary before a D-dimer test. You can eat and drink normally unless instructed otherwise by your doctor.
D-dimer test results are typically available within 4–24 hours depending on lab workflow. Your doctor will explain the results to you and discuss any necessary next steps based on the findings.
Yes, pregnancy, especially in the later stages, can naturally raise D-dimer levels. Your doctor will interpret the results carefully, considering the stage of your pregnancy.
The D-dimer test involves a standard blood draw, similar to other blood tests. Most people feel only minor discomfort or a small pinch during the procedure.
Yes, D-dimer test normal levels can be elevated in many non-clotting conditions, such as infection, inflammation, pregnancy, or recent surgery. This can lead to false-positive results, which is why the test is not used alone for definitive diagnosis.
A D-dimer test is recommended if you have symptoms of a blood-clotting disorder, like unexplained pain, swelling, or shortness of breath, or if your doctor suspects an abnormal clotting condition based on your risk factors and health history.
The D-dimer test measures the breakdown of blood clots, helping rule out active clotting. In contrast, the PT/INR test assesses how long it takes for blood to clot and is used to monitor blood-thinning therapy.
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View your reports and upcoming health checkups at one place.
Please enter the OTP sent to your registered mobile number to verify your identity.
Not sure which tests to take? Share your prescription with us and our team will call you.
Popular Searches
Frequently Booked Tests
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Please share your details, our health advisor will call you or you can call us at 0804-8911-400.
Please share your details, our health advisor will call you or you can call us at 0804-8911-400.