Specificity of the test: Absence of interference by fibrin degradation products.

(*) 210 ng/mL is the detection limit of the STA Liatest. (**) the levels of D-dimer in untreated plasmas and in t-PA treated plasmas being beneath the detection limit of D-dimer (i.e., 210 ng/mL), we conclude only that the SF concentration in this group was ≤200 ng/mL. Fibrin degradation products (D-dimer) were added to normal plasma at the indicated final concentrations. SF was then determined. For each sample, D-dimer measurement was performed in duplicate (but this is not strictly necessary).