“…These are described by many terms: soluble fibrin, soluble fibrin monomer complexes [88], circulating fibrin or thrombin-altered fibrinogen [124], and fibrinogen-fibrin complex [205]. Heparinprecipitable fraction [75,100] and cryofibrinogen probably reflect these complexes. It has been suggested that fibrin monomer can complex with fibrin monomer or fibrinogen (slowly clottable), with FSP X and Y (incoagulable), and with FSP D and E (grossly abnormal fibrin formation [58]).…”