• N Sato, H Takahashi, and A Shibata.
• First Department of Internal Medicine, Niigata University School of Medicine, Japan.
• Am. J. Hematol. 1995 Mar 1; 48 (3): 168-74.

AbstractIn clinical practice, occasionally some patients show dissociated values of fibrinogen/fibrin degradation products (FDP) and D-dimer (cross-linked fibrin degradation products). In an attempt to assess the frequency, clinical backgrounds, and hemostatic states of these cases, FDP and D-dimer were simultaneously measured together with other hemostatic parameters in 371 samples from patients with various diseases. As a whole, FDP were elevated in parallel with the progress of activation of blood coagulation and fibrinolysis. However, in patients with elevated FDP and/or D-dimer, 11.5% of samples showed relatively lower D-dimer values than those expected from FDP levels, and these were regarded as an apparently dissociated group. In the dissociated group, activation of coagulation and fibrinolysis occurred to a lesser extent than others. Analysis of these samples suggested that the possible reasons for the dissociation between FDP and D-dimer values were accelerated fibrinogenolysis with or without secondary fibrinolysis, accelerated fibrinogenolysis by non-plasmic proteinases, elevated soluble fibrin, and possibly false-positive FDP levels due to unclottable fibrinogen remaining in the serum samples. In practice, simultaneous measurements of FDP and D-dimer are useful for more accurate estimation of hyperfibrinolytic states.

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