A 32-year-old male asked:
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Why do anticoagulants sometimes cause a false negative D Dimer? If the thin the blood and don't affect FDP I don't see why they would cause an effect?

1 doctor answer
Dr. Tarik Hadid
17 years experience in Hematology and Oncology
Different : FSP and D Dimer are not synonymous.. D dimer is a by-product of clots and when the anticoagulants prevent formation or clots, d-dimer will be low or falsely negative. D-dimer off anticoagulation can rough predict the risk of recurrent clots.
Answered on Sep 23, 2016
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