D-dimer test

Key facts 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. It’s important to discuss blood test results with your doctor, who can explain what the results mean in your situation. What is a D-dimer test? A D-dimer test is a blood test that checks for blood-clotting problems. This test measures the amount of D-dimer,