D - Dimer

A D-dimer test is a blood test that checks for blood-clotting problems. It measures the amount of D-dimer, a protein your body makes to break down blood clots. A positive test means the D-dimer level in your body is higher than normal. It suggests you might have a blood clot or blood clotting problems.

The results from our study from a pre–COVID-19 patient population suggest that ultra-high plasma D-dimer levels indicate the presence of severe underlying disease. This should be considered when using the plasma D-dimer level as a screening tool or prognostic indicator for COVID-19 infection.

Why the Test is Performed. Your health care provider may order a D-dimer test if you are showing symptoms of blood clots or abnormal bleeding, such as: Swelling, pain, warmth, and changes in skin color of your leg or arm. Sharp chest pain, trouble breathing, coughing up blood, or fast heartbeat.