Abstract
To investigate the characteristic differences between disseminated intravascular coagulation (DIC) found in surgical sepsis (septic DIC) and those found in patients with advanced gastrointestinal cancer (cancer DIC), we focused on two substances, endotoxin and platelet- activating factor (PAF). Coagulation test values were determined in 36 patients with DIC, and endotoxin and PAF concentrations in 13 of these patients. Seven septic patients were given a PAF antagonist to evaluate its usefulness in treating thrombocytopenia. Blood PAF and endotoxin concentrations were higher in patients with septic DIC, but they were almost normal in those with cancer DIC. Blood PAF concentrations showed a strong positive relationship to endotoxin only in septic DIC. There was a negative correlation between PAF concentrations and platelet counts in septic patients; platelet counts gradually increased after the administration of a PAF antagonist. PAF is inversely associated with platelet counts in patients with septic DIC. A PAF antagonist showed marked inhibitory effects on the characteristic changes of septic DIC, especially thrombocytopenia.
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