What does a positive D-dimer test indicate?
A positive D-dimer result may indicate the presence of an abnormally high level of fibrin degradation products. It indicates that there may be significant blood clot (thrombus) formation and breakdown in the body, but it does not tell the location or cause.
What does it mean when D-dimer is elevated?
An elevated D-dimer level is not normal. It’s usually found after a clot has formed and is in the process of breaking down. 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.
What is normal range of D-dimer?
A normal D-dimer is considered less than 0.50. A positive D-dimer is 0.50 or greater. Since this is a screening test, a positive D-Dimer is a positive screen.
Can infection cause elevated D-dimer?
A significant positive correlation was found between age and D-dimer. Infection was the most frequent diagnosis (15.6%), followed by VTE (12.1%), syncope (9.4%), heart failure (8.9%), trauma (8.2%) and cancer (5.8%).
How accurate are D-dimer tests?
D-Dimer test is more than 90% accurate for detecting blood clots. It could be complemented with platelets count,prothrombin time,activated partial trombhoplastin time, fibrinogen , and FDP test for detecting the existence of blood clot. The normal value should be <500 ng/ml.
What are the normal ranges of a D-dimer test?
The normal range for D-dimer is approximately 0.5 mg/l of blood or 500 mg/ml of blood . Testing of d-dimer range is usually not done when suspicions of individuals who have symptoms of scattered intra-vascular coagulation have been confirmed and have been diagnosed to be suffering from the condition.
How reliable is a D-dimer blood test?
He says medical info indicates d dimer tests are 95% accurate and did not suggest a lung scan unless the condition returned, As one might imagine, I am a little paranoid after my previous experience and the fact if I am in the other 5% it could be life threatening.
Why is a positive D-dimer is not always a blood clot?
Why a Positive D-Dimer Is Not Always a Blood Clot. A blood clot causes a breakdown product called D-dimer . A negative blood result means you don’t have a pulmonary embolism. But with increasing age comes an increased likelihood of a positive result, even if there are no blood clots.