Objective: We examined the current status of ruptured cerebral aneurysm treatment and results of coil embolization in a district.
Methods:We conducted a prospective, multicenter, cooperative observational study involving 169 patients with ruptured cerebral aneurysms who were treated in the acute phase between September 2013 and March 2016. Predictive factors for poor outcome (90-day modified Rankin Scale 3-6) were investigated, and the results were compared between craniotomy and coil embolization.
Results:Coil embolization was performed for 39 patients (23.1%). In all, 63 (37.3%) patients had poor outcome. Univariate analysis showed that predictive factors for poor outcome included an advanced age, pre-onset disability, history of cerebral infarction, poor grade on admission, modified Fisher grade 4, acute hydrocephalus, cerebrospinal fluid drainage, craniotomy, craniotomy-related complications, the absence of fasudil hydrochloride administration, delayed cerebral ischemia, delayed cerebral infarction, shunting, pneumonia, and heart failure. On multivariate analysis, predictive factors for poor outcome included pre-onset disability, poor grade on admission, modified Fisher grade 4, delayed cerebral infarction, and heart failure, whereas the prophylactic administration of intravenous fasudil hydrochloride and coil embolization were independent factors associated with good outcome. In patients who underwent craniotomy, the incidences of cerebral vasospasm and cerebral infarction were significantly higher than in those who underwent coil embolization.
Conclusion:This was an observational study, and the indication of treatment or strategies differed among institutions, which was a limitation. However, coil embolization was an independent factor associated with good outcome.Keywords▶ subarachnoid hemorrhage, outcome, prognostic factor, endovascular therapy
IntroductionRuptured cerebral aneurysm-related subarachnoid hemorrhage is a serious disease, with a high mortality rate. Although there have been no marked changes in its incidence during the past 30 years, the mortality rate has decreased to 1/2. 1,2) This may have been related to advances in diagnostic imaging procedures, such as CT, and treatment, such as clipping and coil embolization. However, there are still many patients complaining of sequelae. Early brain injury (EBI), which occurs in the acute phase, and delayed cerebral ischemia (DCI) may be primarily involved in such sequelae related to subarachnoid hemorrhage. [3][4][5][6] As the simplest parameter that represents the grade of EBI, the World Federation of Neurological Surgeons (WFNS) grade has been used. A study reported that the outcome was poorer in highergrade patients. 7) Various predictive factors for poor outcome have been reported, but most factors are present on admission; there are few factors for which intervention is possible. 8) On the other hand, as a treatment modality, the International Subarachnoid Aneurysm Trial (ISAT) indicated the advantage of coil embolization. 9) However, the Diag...