Fibrin degradation products (FDPs) — also called fibrin split products — are small pieces of

protein that stay in your blood when a blood clot dissolves inside your body. Doctors can

test for the presence of these small protein fragments and therefore diagnose conditions that

can negatively impact your health.Serum FDP levels were less than 10 mug/ml in normal

control adults, averaging 3.2 +/- 1.2 mug/ml.