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Novel Electrode Architecture for Subgaleal Electroencephalography: A Feasibility Study
medRxiv - Neurology Pub Date : 2021-08-28 , DOI: 10.1101/2021.08.25.21262594
Arman Ahnood , Nhan Duy Truong , Bobbi Fleiss , Armin Nikpour , Omid Kavehei

Electroencephalography (EEG) has been widely used to understand the nervous system and as a clinical diagnostic tool. In the case of neurological conditions with intermittent episodes, such as epilepsy, long-term EEG monitoring outside the clinics and in the community setting is vital. Subgaleal EEG (sgEEG) has emerged as an essential tool for long-term monitoring over several years. Current sgEEG solutions share a need for at least a 10 cm long lead wire, resulting in a bulky and invasive device. This work introduces a novel electrode architecture for subgaleal EEG recording, which forgoes the need for lead wires. A back-to-back electrode configuration with an electrode spacing of less than 1 mm is proposed. Compared to the current side-by-side approaches with an electrode spacing of several cm, our proposed approach results in at least one order of magnitude reduction in volume. The efficacy of the proposed electrode architecture is investigated through finite element modeling, phantom measurements, and cadaver studies. Our results suggest that compared to the conventional side-by-side electrode configuration, the source signal can be recorded reliably. Lead wires have posed a significant challenge from a device reliability and measurement quality perspective. Moreover, lead wires and the associated feedthrough connectors are bulky. Our proposed lead-free EEG recording solution may lead to a less invasive surgical placement through volume reduction and improve EEG recording quality.

中文翻译:

用于帽下脑电图的新型电极结构:可行性研究

脑电图 (EEG) 已被广泛用于了解神经系统并作为临床诊断工具。对于间歇性发作的神经系统疾病,例如癫痫,在诊所外和社区环境中进行长期 EEG 监测至关重要。多年以来,帽状脑电图 (sgEEG) 已成为长期监测的重要工具。当前的 sgEEG 解决方案需要至少 10 厘米长的引线,从而导致设备体积庞大且具有侵入性。这项工作引入了一种用于帽状下脑电图记录的新型电极结构,它不需要引线。提出了一种电极间距小于 1 mm 的背对背电极配置。与目前电极间距为几厘米的并排方法相比,我们提出的方法导致体积至少减少一个数量级。通过有限元建模、体模测量和尸体研究来研究所提出的电极结构的功效。我们的结果表明,与传统的并排电极配置相比,可以可靠地记录源信号。从设备可靠性和测量质量的角度来看,引线已经构成了重大挑战。此外,引线和相关联的馈通连接器体积庞大。我们提出的无铅 EEG 记录解决方案可能会通过减小体积和提高 EEG 记录质量来减少侵入性手术放置。和尸体研究。我们的结果表明,与传统的并排电极配置相比,可以可靠地记录源信号。从设备可靠性和测量质量的角度来看,引线已经构成了重大挑战。此外,引线和相关联的馈通连接器体积庞大。我们提出的无铅 EEG 记录解决方案可能会通过减小体积和提高 EEG 记录质量来减少侵入性手术放置。和尸体研究。我们的结果表明,与传统的并排电极配置相比,可以可靠地记录源信号。从设备可靠性和测量质量的角度来看,引线已经构成了重大挑战。此外,引线和相关联的馈通连接器体积庞大。我们提出的无铅 EEG 记录解决方案可能会通过减小体积和提高 EEG 记录质量来减少侵入性手术放置。
更新日期:2021-08-31
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