D-dimer, Serum/Plasma Mass Concentration

What Is D-Dimer Used For?

Doctors use the D-dimer test primarily to evaluate whether you have a condition involving abnormal blood clotting. It can help determine if you’re at risk for deep vein thrombosis (DVT) or pulmonary embolism (PE), which are serious blood clot problems in the legs or lungs. This test is often used alongside other tests to guide decisions about further medical care.

How Is the D-Dimer Test Performed?

A blood sample is taken from a vein in your arm. The blood is then processed to measure D-dimer levels. The test is usually done in a lab and can be completed quickly. You may need to fast for a few hours before the test, but this depends on your doctor’s instructions.

What Might Affect Your Results?

Several factors can influence D-dimer levels, including recent blood clotting events, pregnancy, certain medications (like anticoagulants), infections, or inflammatory conditions. If you have any of these factors, it’s important to discuss them with your healthcare provider before or after the test.

When Might You Need This Test?

Your doctor may recommend a D-dimer test if you have symptoms like swelling, pain in your legs, shortness of breath, or chest pain that could suggest a blood clot. It may also be used as part of a screening process for people at higher risk of clots, such as those with a history of DVT or PE.