[Treatment for serious cases of ruptured intracranial aneurysms with severe subarachnoid clot].

Forty-one serious cases of ruptured intracranial aneurysms with severe subarachnoid clot were clinically analyzed, with special emphasis on the prognosis, pathophysiology, and surgical indications. All cases had thick subarachnoid clot without concurrent intracerebral hematoma and/or intraventricular hematoma causing mass signs on the CT scan. In this series, 23 cases underwent radical surgery while in the acute stage, 18 cases were treated conservatively (including 5 cases treated only by continuous ventricular drainage). The criterion for determining the degree of severity was defined as either a "semicoma" or "coma" state just prior to radical surgery for the radically-operated group, with the same designations for the conservative group at their time of admission. All patients except two in the conservatively-treated group died due to primary brain damage caused by massive subarachnoid hemorrhage. The two remaining cases died from other complications. On the other hand, the outcome for the 23 surgically-treated patients was as follows: Three (13%) fully recovered; three (13%) were capable of self-management; eight (34.8%) were partially or fully dependent. Nine (39.1%), died. In the radically-treated group, pre-operative factors that might predict clinical outcome were investigated. Those factors were the neurological grade, the brain-stem response, the response after the rapid administration of 20% Mannitol (300-900 ml), and the length of time from the last bleeding episode to the time that radical surgery was performed. It was recognized that there was no relationship between the neurological grade just prior to radical surgery and the outcomes in the serious cases.(ABSTRACT TRUNCATED AT 250 WORDS)