Keyhole Approach Combined With External Ventricular Drainage for Ruptured, Poor-Grade, Anterior Circulation Cerebral Aneurysms.

Poor-grade ruptured anterior circulation cerebral aneurysms are frequently associated with severe vasospasm and high morbidity rates despite recent remarkable advances in endovascular coiling.Here, we explored the feasibility of keyhole approach combined with external ventricular drainage for ruptured, poor-grade, anterior circulation cerebral aneurysms. We retrospectively assessed the records of 103 patients with ruptured, Hunt and Hess grade IV or V, anterior circulation cerebral aneurysms. The patients were divided into 2 groups (conservative group and surgical group). In surgical group, patients were divided into 2 subgroups according to surgical time (within 24 hours and at 24-48  hours). Clinical outcome was assessed at the 6-month follow-up and categorized according to modified Rankin Scale (mRS) score.Twenty percent of patients (9/44) in conservative group obtained good outcome, while 54% (32/54) in surgical group (P < 0.05). Mortality was 73% in conservative group and 40% in surgical group, respectively. In surgical group, age, Hunt and Hess grade (IV or V), and timing of intervention (<24  hours or later) influenced the clinical outcome of the patients (P < 0.05), while sex, Fisher grade, hydrocephalus, the location of aneurysms, and cerebral vasospasm (CVS) not (P > 0.05). Furthermore, 65% of patients (22/34) operated within 24  hours after onset of hemorrhage had a good outcome compared with 20% of patients (5/25) operated at 24 to 48  hours in surgical group (P < 0.05).The results indicate that keyhole approach combined with external ventricular drainage is a safe and reliable treatment for ruptured, poor-grade, anterior circulation cerebral aneurysms in early stage, which will reduce mortality.