• Tsutomu Yoshikane, Takeshi Miyazaki, Shinichi Yasuda, Masahiro Uchimura, Yuta Fujiwara, Fumio Nakagawa, Mizuki Kambara, Hidemasa Nagai, and Yasuhiko Akiyama.
• Department of Neurosurgery, Shimane University Faculty of Medicine, Izumo, Shimane, Japan. Electronic address: tsutomuz3000@gmail.com.
• World Neurosurg. 2021 Mar 1; 147: e482-e490.

BackgroundAneurysmal subarachnoid hemorrhage (aSAH) in the elderly often has a poor prognosis even after surgical treatment in the acute phase. Additionally, subarachnoid clots are the strongest predictors of cerebral vasospasm and tend to be thicker and heavier due to cerebral atrophy. We aimed to compare the conventional surgical treatment in such patients and identify the independent predictors of a favorable outcome after aggressive surgical clot removal.MethodsWe included 40 patients with aSAH aged 70 or older. Each patient underwent aneurysmal clipping. We used the modified Rankin Scale to assess the primary outcome of neurologic status at discharge. We performed univariate analysis using the following factors: sex, age, neurologic, and general medical condition, radiographic data, aneurysm location, treatment approach, and timing of the aneurysm surgery. We divided the patients into irrigation and nonirrigation groups. We focused mainly on subarachnoid clots and analyzed them semiquantitatively using computed tomography.ResultsClot removal was significantly greater in the irrigation group (n = 21) than in the nonirrigation group (n = 19). The period of intrathecal drainage was significantly shorter in the irrigation group (P = 0.002). The rate of occurrence of new low-density areas on CT scans was higher in the nonirrigation group. Outcomes were better in the irrigation group (P = 0.010).ConclusionsIn elderly patients with aSAH in the acute phase, aggressive surgical clot removal after clipping showed favorable outcomes by facilitating early out-of-bed mobilization.Copyright © 2020 Elsevier Inc. All rights reserved.

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