Antifibrinolytic Therapy in Ruptured Intracranial Aneurysm Through Repeated Monitoring of Fibrinolytic Activity of Blood

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Streptkinase euglobulin lysis time (SK-ELT), fibrin and fibrinogen degradation products (FDP) and fibrinogen in blood were measured to determine the proper dosage of t-AMCHA which would not cause ischemic complications but yet would suffice to prevent rebleeding in ruptured intracranial aneurysm. SK-ELT was almost doubled (130 sec) by the administration of 6-8 g/day of t-AMCHA within 24 h in normal control. On the other hand, SK-ELT in SAH patients fluctuated markedly during ten days after first bleeding. FDP demonstrated high value soon after first bleeding in Grade IV and V patients. Increase in FDP was also observed following rebleeding, severe vasospasm, and progressive neurological deterioration. Usually the increase in FDP was most obvious between 4-14 days after SAH. Fibrinogen showed the tendency to increase gradually by the administration of t-AMCHA, and this increased fibrinogen would be one of the alarm signs to indicate development of ischemic complications. From these results, it was suggested that doses of t-AMCHA should be determined precisely according to the result of repeated monitoring, and doses should be as such that it could keep SK-ELT constant between 130-150 sec.
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