caa a22 4500 606214291 CHVBK 20210128101052.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00701-015-2435-3 doi (NATIONALLICENCE)springer-10.1007/s00701-015-2435-3 Superficial subarachnoid cerebrospinal fluid space expansion after surgical drainage of chronic subdural hematoma [Elektronische Daten] [Masahiko Tosaka, Yoshito Tsushima, Saiko Watanabe, Kazuya Sakamoto, Masahiko Yodonawa, Hideo Kunimine, Haruyasu Fujita, Takashi Fujii] Background: The present study examined the computed tomography (CT) findings after surgery and overnight drainage for chronic subdural hematoma (CSDH) to clear the significance of inner superficial subarachnoid CSF space and outer subdural hematoma cavity between the brain surface and the inner skull. Methods: A total of 73 sides in 60 patients were evaluated. Head CT was performed on the day after surgery and overnight drainage (1st CT), within 3weeks of surgery (2nd CT), and more than 3weeks after surgery (3rd CT). Subdural and subarachnoid spaces were identified to focus on density of fluid, shape of air collection, and location of silicone drainage tube, etc. Cases with subdural space larger than the subarachnoid CSF space were classified as Group SD between the brain and the skull. Cases with subarachnoid CSF space larger than the subdural space were classified as Group SA. Cases with extremely thin (<3mm) spaces between the brain and the skull were classified as Group NS. Results: Group SA, SD, and NS accounted for 31.9, 55.6 and 12.5% of cases on the 1st CT. No statistical differences were found between Groups SA, SD, and NS in any clinical factors, including recurrence. Group SA were found significantly more on 1st CT than on 2nd and 3rd CT. Conclusions: Subarachnoid CSF space sometimes expands between the brain and skull on CT after surgical overnight drainage. Expansion of the arachnoid space may be a passive phenomenon induced by overnight drainage and delayed re-expansion of the brain parenchyma. Springer-Verlag Wien, 2015 Chronic subdural hematoma nationallicence Computed tomography nationallicence Subarachnoid space nationallicence Subdural space nationallicence Surgical drainage nationallicence Tosaka Masahiko Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut Tsushima Yoshito Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan aut Watanabe Saiko Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut Sakamoto Kazuya Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut Yodonawa Masahiko Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut Kunimine Hideo Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut Fujita Haruyasu Department of Public health, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan aut Fujii Takashi Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut Acta Neurochirurgica Springer Vienna 157/7(2015-07-01), 1205-1214 0001-6268 157:7<1205 2015 157 701 https://doi.org/10.1007/s00701-015-2435-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00701-015-2435-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tosaka Masahiko Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut NATIONALLICENCE 700 1- Tsushima Yoshito Department of Diagnostic Radiology and Nuclear Medicine, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Watanabe Saiko Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut NATIONALLICENCE 700 1- Sakamoto Kazuya Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut NATIONALLICENCE 700 1- Yodonawa Masahiko Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut NATIONALLICENCE 700 1- Kunimine Hideo Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut NATIONALLICENCE 700 1- Fujita Haruyasu Department of Public health, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan aut NATIONALLICENCE 700 1- Fujii Takashi Fujii Neurosurgical Hospital, Utsunomiya, Tochigi, Japan aut NATIONALLICENCE 773 0- Acta Neurochirurgica Springer Vienna 157/7(2015-07-01), 1205-1214 0001-6268 157:7<1205 2015 157 701