Quantitative assay for fibrin monomer was done by use of a chromogenic substrate (S-2390, Coa set fibrin monomer). Samples from DIC prone patients with the underlying disease were assayed and classified into four groups. The pre DIC group showed higher FM values than the control with no laboratory coagulation abnormality, although the FDP . D-dimer showed no significant rise. FM assay is a useful marker for the detection of early coagulopathy in DIC. Administration of the AT III concentrate in the case of low level of plasma ATIII, thrombin . antithrombin complex I (TAT) caused a significant transient rise. The clinical course of DIC by TAT is often affected by the fluctuation of ATIII level in plasma, the usefulness of FM is that it reflects the real thrombin generation in DIC.
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