D-Dimer

During an injury, the body uses proteins to clot the blood and stop bleeding. Once the bleeding stops, the body sends other proteins to break down the clot slowly. D-dimer is a protein fragment generated during the breakdown of blood clots. A D-Dimer test determines the presence of D-dimer and helps assess the blood clot formation and breakdown in the body.

This test may be needed in individuals presenting with symptoms suggestive of blood clots, such as leg swelling, pain, redness, shortness of breath, chest pain, rapid heartbeat, or signs of abnormal bleeding. Higher than normal D-dimer levels can indicate the presence of an active blood clot, and hence, a D-Dimer test helps diagnose or rule out blood clot-related conditions such as DVT, PE, stroke, and DIC. Sometimes, this test is also used to monitor the effectiveness of treatment for these conditions. In addition, a D-dimer test also helps understand the risk and progression in cases of pneumonia and COVID-19.

No fasting is required for this test. You can eat and drink normally as per your routine. However, a duly filled coagulation requisition form is mandatory for sample collection. Before getting tested, let your doctor know if you are taking any medications, as they might interfere with the test results, and you may have to stop taking them for some time.

Test result ranges are approximate and may differ slightly between labs depending on the methodology and laboratory guidelines. Talk to your doctor about your specific test results to understand your condition, and narrate your complete medical history to your doctor to help formulate an effective treatment plan.