D-dimer, plasma, mass concentration

What Is D-Dimer Used For?

D-dimer is primarily used to evaluate whether you may have a condition involving abnormal blood clotting, such as deep vein thrombosis (blood clots in veins) or pulmonary embolism (clots in the lungs). It can also help rule out these conditions when combined with other tests and clinical findings.

How Is This Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then processed to separate plasma, and the D-dimer level is measured using a sensitive immunoassay technique to detect its presence.

Why Might You Need This Test?

Your healthcare provider may order a D-dimer test if you have symptoms like swelling, pain, or shortness of breath that could suggest blood clots. It may also be used during investigations of unexplained bleeding or after a suspected clot event to monitor treatment effectiveness.

What Do Results Mean?

Results are not given in absolute numbers but are interpreted in the context of your symptoms, medical history, and other test results. High levels of D-dimer often indicate recent clot formation, while very low levels may suggest no active clotting process.