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Fujimoto A, Matsumaru Y, Masuda Y, Marushima A, Hosoo H, Araki K, Ishikawa E. Endovascular Electroencephalogram Records Simultaneous Subdural Electrode-Detectable, Scalp Electrode-Undetectable Interictal Epileptiform Discharges. Brain Sci 2022; 12:brainsci12030309. [PMID: 35326265 PMCID: PMC8946704 DOI: 10.3390/brainsci12030309] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 12/03/2022] Open
Abstract
Introduction: We hypothesized that an endovascular electroencephalogram (eEEG) can detect subdural electrode (SDE)-detectable, scalp EEG-undetectable epileptiform discharges. The purpose of this study is, therefore, to measure SDE-detectable, scalp EEG-undetectable epileptiform discharges by an eEEG on a pig. Methods: A pig under general anesthesia was utilized to measure an artificially generated epileptic field by an eEEG that was able to be detected by an SDE, but not a scalp EEG as a primary outcome. We also compared the phase lag of each epileptiform discharge that was detected by the eEEG and SDE as a secondary outcome. Results: The eEEG electrode detected 113 (97%) epileptiform discharges (97% sensitivity). Epileptiform discharges that were localized within the three contacts (contacts two, three and four), but not spread to other parts, were detected by the eEEG with a 92% sensitivity. The latency between peaks of the eEEG and right SDE earliest epileptiform discharge ranged from 0 to 48 ms (mean, 13.3 ms; median, 11 ms; standard deviation, 9.0 ms). Conclusion: In a pig, an eEEG could detect epileptiform discharges that an SDE could detect, but that a scalp EEG could not.
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Affiliation(s)
- Ayataka Fujimoto
- Comprehensive Epilepsy Center, Seirei Hamamatsu General Hospital, Shizuoka 988-056, Japan;
- School of Rehabilitation Sciences, Seirei Christopher University, Shizuoka 988-056, Japan
| | - Yuji Matsumaru
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan; (Y.M.); (A.M.); (H.H.); (K.A.); (E.I.)
- E.P. Medical Inc., 403 Nihonbashi-Life-Science Building, 2-3-11, Honcho, Nihonbashi, Chuo-ku, Tokyo 103-0023, Japan
- Correspondence: ; Tel.: +81-29-853-3900; Fax: +81-29-853-3214
| | - Yosuke Masuda
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan; (Y.M.); (A.M.); (H.H.); (K.A.); (E.I.)
| | - Aiki Marushima
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan; (Y.M.); (A.M.); (H.H.); (K.A.); (E.I.)
| | - Hisayuki Hosoo
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan; (Y.M.); (A.M.); (H.H.); (K.A.); (E.I.)
| | - Kota Araki
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan; (Y.M.); (A.M.); (H.H.); (K.A.); (E.I.)
| | - Eiichi Ishikawa
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1, Tennodai, Tsukuba 305-8575, Japan; (Y.M.); (A.M.); (H.H.); (K.A.); (E.I.)
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El-Sewify IM, Khalil MMH. Mesoporous nanosensors for sensitive monitoring and removal of copper ions in wastewater samples. NEW J CHEM 2021. [DOI: 10.1039/d0nj05338d] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
FHNS nanosensors allow for the ultra-sensitive monitoring and capture of Cu2+ ions with a low detection limit and high adsorption capacity.
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Affiliation(s)
- Islam M. El-Sewify
- Department of Chemistry
- Faculty of Science
- Ain Shams University
- Abbassia
- Egypt
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