D-dimer (Serum/Plasma) Mass Concentration

What Is D-dimer Used For?

D-dimer is primarily used to evaluate blood clotting activity. A high level may suggest recent clot formation, while a low level may indicate no active clotting process. It’s often ordered alongside imaging tests to support a diagnosis of conditions like deep vein thrombosis (DVT) or pulmonary embolism (PE).

How Is This Test Performed?

Blood is drawn from a vein in your arm, and the serum or plasma sample is sent to a lab for analysis. The test measures the mass concentration of D-dimer using a specialized laboratory technique, often a turbidimetric or nephelometric assay.

Why Might Your Doctor Order This Test?

Your doctor may recommend a D-dimer test if you have symptoms like swelling, pain in the legs, shortness of breath, or a history of blood clots. It can also be used in certain screening or monitoring situations, such as before surgery or in patients with suspected clotting disorders.

What Are Common Results and Next Steps?

Results are not typically provided as absolute numbers but are interpreted in the context of your symptoms and medical history. High levels may prompt further testing (like imaging) to confirm a clot, while low levels may suggest no clot activity. Follow-up care depends on your doctor’s findings and recommendations.