Video-EEG monitoring is often used to detect nonconvulsive status epilepticus (NCSE) in critical care patients. Short recording durations may fail to detect seizures. In this study, we investigated the time required to record the first ictal event, and whether it could be correlated with some clinical or EEG parameters. Video-EEG recordings of patients who were followed up in our neurological intensive care unit were evaluated retrospectively. The EEG recordings of patients with NCSE were reviewed to determine the timing of the first seizure occurrence. Demographic data and EEG findings were obtained from patient charts and EEG reports. Possible correlations between the presence of periodic discharges (PD), Glasgow Coma Scale (GCS) score and early seizure detection (defined as a seizure within the first hour of recording) were explored statistically. Out of 200 patients who underwent video-EEG monitoring, we identified 30 cases (15%; 18 male, 12 female; age 24-86 years; mean recording duration 99 hours) with NCSE. The first seizure was recorded within 0 to 1 hour in 22 patients (73%) and within 1 to 12 hours in 6 patients (22%). Interictal PDs were identified in 19 patients (63%). GCS score was ≤8 in 16 patients (53%). There was no correlation between early seizure detection and PDs (p=1.0) or GCS score (P = .22). In our study, >90% of the seizures were captured within 12 hours. This finding suggests that most of the NCSE cases can be identified even in centers with limited resources. The presence or absence of PDs or GCS score does not predict the timing of the first seizure.

中文翻译：

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神经重症监护病房非惊厥性癫痫持续状态患者首次癫痫发作的检测时间

视频脑电图监测常用于检测重症监护患者的非惊厥性癫痫持续状态 (NCSE)。短记录持续时间可能无法检测到癫痫发作。在这项研究中，我们调查了记录第一次发作事件所需的时间，以及它是否与某些临床或 EEG 参数相关。在我们的神经重症监护病房接受随访的患者的视频脑电图记录进行了回顾性评估。对 NCSE 患者的脑电图记录进行审查以确定第一次癫痫发作的时间。人口统计学数据和脑电图结果来自患者图表和脑电图报告。周期性放电 (PD) 存在之间可能存在的相关性，格拉斯哥昏迷量表 (GCS) 评分和早期癫痫发作检测（定义为记录的第一小时内的癫痫发作）进行了统计学探索。在接受视频脑电图监测的 200 名患者中，我们确定了 30 例（15%；18 名男性，12 名女性；年龄 24-86 岁；平均记录持续时间 99 小时）的 NCSE。22 名患者 (73%) 在 0 至 1 小时内和 6 名患者 (22%) 在 1 至 12 小时内记录了首次癫痫发作。在 19 名患者 (63%) 中发现了发作间期 PD。16 名患者 (53%) 的 GCS 评分≤8。早期癫痫检测与 PD (p = 1.0) 或 GCS 评分 (P = .22) 之间没有相关性。在我们的研究中，超过 90% 的癫痫发作是在 12 小时内捕获的。这一发现表明，即使在资源有限的中心，也可以发现大多数 NCSE 病例。