D-dimer (Plasma) – Quantitative Measurement

What Is D-Dimer Used For?

D-dimer is primarily used to evaluate the risk of blood clots (thrombosis) or disseminated intravascular coagulation (DIC), a rare but serious condition where clots form throughout the body. It can also assist in diagnosing conditions like pulmonary embolism (blockage in the lungs) or deep vein thrombosis (clot in a vein).

How Is the Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The blood is processed to separate plasma, where the D-dimer levels are measured using a sensitive immunoassay technique.

What Does a High or Low Level Mean?

Elevated D-dimer levels often suggest recent clot formation or breakdown, which may indicate conditions like a pulmonary embolism or deep vein thrombosis. However, false positives can occur due to pregnancy, surgery, or other inflammatory conditions. Low or normal levels generally mean there is less likelihood of active clotting, but they don’t rule out all clot-related issues entirely.

When Might You Need This Test?

Your healthcare provider may order a D-dimer test if you have symptoms like shortness of breath, chest pain, leg swelling, or if you’ve had recent surgery, trauma, or a history of blood clots.