D-Dimer - Health Encyclopedia - University of
If you are having significant formation and breakdown of blood clot in your body, your D-dimer may be elevated. A negative D-dimer test means that a blood clot is highly unlikely. A positive D-dimer test doesn't mean that you have a clot. There may be other reasons it is positive. More testing is usually needed. How is this test done? The test requires a blood sample, which is drawn through a needle …
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