D-dimer plasma mass concentration (quantitative)

Why Is This Test Done?

Your healthcare provider may order this test to check for signs of blood clots, especially if you have symptoms like swelling, pain, or shortness of breath. It can also be used to evaluate conditions like deep vein thrombosis (DVT) or pulmonary embolism (PE). Sometimes, it’s part of a screening or diagnostic process for other blood-related issues.

What Does a High or Low Level Mean?

A high D-dimer level often suggests recent clot formation, which can guide treatment decisions. However, a normal result doesn’t always mean you don’t have a clot—it may just mean no significant breakdown of clots was detected at the time of testing. False positives can occur, so results should be reviewed by a healthcare provider.

How Is This Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The plasma portion is tested for D-dimer using a sensitive laboratory method to detect its presence.

What Are Common Causes of Abnormal Results?

Elevated D-dimer levels can be caused by active blood clots, certain cancers, infections, or other conditions that increase clot breakdown. Low levels may be normal or could indicate conditions like severe bleeding or certain blood disorders.