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Fibrinolytic and procoagulant activity in septic and haemorrhagic shock.

Septic and haemorhagic shock carry the risk of high mortality. Failure of microcirculation secondary to alterations of haemostasis and fibrinolysis play a major role in the pathogenesis of shock. The aim of this study was to evaluate the clinical relevance of procoagulatory and fibrinolytic activities referring to survival. Therefore, 39 patients (23 to 80 yrs, 16 females, 23 males) suffering from haemorrhagic (n = 21) and septic shock (n = 18) were screened prospectively for plasmatic coagulation and fibrinolysis parameters. Thirteen patients (33.3%) developed lethal outcome. Concerning fibrinolysis, plasminogen was significantly lower in non-survivors by day 1 and plasmin-antiplasmin complex significantly higher by day 4 compared to survivors. Consecutive increase of plasminogen over day 4 and 7 was significantly stronger in survivors. Concerning haemostasis activation, thrombin-antithrombin complex was higher and D-dimers or fibrinogen levels were lower, but not significantly different, in non-survivors compared to survivors. We conclude from these data, that procoagulant activities are increased, but not significantly predictive for the clinical outcome in septic and haemorrhagic shock. By contrast, fibrinolysis, as measured by enhanced capacity and responsiveness, is clearly predictive and plays a significant role for survival, possibly due to its clearing function in microcirculation.