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Corresponding author: Yu Sam Won Department of Neurosurgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul 03181, Republic of Korea Tel: +82-2-2001-2450 Fax: +82-2-2001-2157 E-mail: yusam.won@samsung.com Objective: Chronic or shunt-dependent hydrocephalus (SDH) is a hydrocephalus that develops at two weeks or more after onset of subarachnoid hemorrhage (SAH). A recent study has reported that lumbar drainage (LD) can reduce the incidence of SDH after coil embolization of aneurysmal SAH, different from previous studies. The purpose of this study was to determine the effect of LD on incidence of SDH after SAH in patients who underwent coil embolization. Methods: A total of 113 patients who were treated with coil embolization only for SAH from January 2006 to August 2013 were investigated. They were randomly allocated into two groups depending on the management protocol that included LD insertion or not. SDH was defined based on Evans index and bicaudate index on computed tomography. We compared incidence of SDH according to the presence and absence of LD. Results: LD was performed in 53 (46.9%) patients. Of these patients, 14 had SDH measured by Evans index (p=0.089) while seven had SDH measured by bicaudate index (p=0.007). Ventriculoperitoneal shunt was performed in five patients of LD group (p=0.258). Conclusion: LD insertion in patients who underwent coil embolization reduced the risk of SDH after SAH.

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Effect of Lumbar Drainage on Incidence of Shunt-Dependent Hydrocephalus in Patients with Subarachnoid Hemorrhage Due to Ruptured Aneurysm Who Underwent Coil Embolization