D-dimer test
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What is a D-dimer Test?
A D-dimer test is a type of blood test used to detect levels of a protein fragment (known as a D-dimer) created when a blood clot breaks down. Doctors may use this test to help diagnose a pulmonary embolism (PE), deep vein thrombosis, or other conditions that involve clotting. This test uses a sample of blood to determine levels of D-dimmer in the bloodstream.
Who gets a D-dimer Test?
A doctor may order a D-dimer test if they suspect a person has a blood clot. The signs and symptoms of DVT or PE include sudden pain in the calf, warmth or redness in the legs, and difficulty breathing. The doctor may order imaging tests such as an ultrasounds to confirm the diagnosis or a D-dimer test to help establish the presence of a clot.
Preparing for a D-dimer Test
Typically, no special preparation is required for this test. However, doctors may advise their patients to avoid taking certain medications, such as aspirin, for a few days prior to the test. It's important to follow all the instructions given by the doctor.
Procedure for a D-dimer Test
A D-dimer test is a simple procedure that usually involves drawing a sample of blood from a vein in the arm. The sample is then sent to a lab, where technicians measure the level of D-dimer in the blood. Results are generally available within a few days.
Types of D-dimer Tests
There are two types of D-dimer tests: rapid D-dimer tests and quantitative D-dimer tests. Rapid D-dimer tests are generally done in a doctor’s office or hospital and the results are available in a few minutes. Quantitative D-dimer tests are more accurate and a more reliable indicator of whether or not a person has a blood clot. Results can take several days.
Risks of a D-dimer Test
Generally, no risks are associated with this type of test. It is a quick procedure that involves drawing a small sample of blood.
Why get a D-dimer Test?
A D-dimer test is useful for determining if a person has a blood clot. Because a blood clot can be dangerous, this test helps diagnose the condition quickly and accurately. Without treatment, blood clots can become more serious and potentially cause life-threatening complications.
When to get a D-dimer Test?
A doctor will typically order a D-dimer test if they suspect a person has DVT or PE. However, the test may also be ordered for other conditions, such as stroke, cancer or sepsis. It’s important to follow the doctor’s instructions and understand the reasons for getting the test.
