Ohshima N, Chinzei M, Mizuno K, Hayashida M, Kitamura T, Shibuya H, Hanaoka K
Department of Neuropsychiatry, Graduate School of Medicine, The University of Tokyo, Shiroganedai, Tokyo, Japan.
Br J Anaesth. 2007 Jan;98(1):100-4. doi: 10.1093/bja/ael309. Epub 2006 Nov 9.
This case report describes a patient with a history of epileptic seizures who showed unusual decreases in the Bispectral Index (BIS) attributable to the induction of abnormal slow electroencephalographic (EEG) waves by photic stimulation, without any associated decrease in his level of consciousness. After starting anticonvulsive therapy, photic stimulation no longer induced abnormal EEG activity nor decreased BIS values. These findings suggest that BIS values may not accurately reflect a patient's actual level of consciousness in the presence of epilepsy-related abnormal EEG activity and that the BIS monitor may be able to track such EEG changes.
本病例报告描述了一名有癫痫发作史的患者，其双谱指数（BIS）出现异常下降，这是由于光刺激诱发了异常的慢脑电图（EEG）波，而其意识水平并未相应下降。开始抗惊厥治疗后，光刺激不再诱发异常的EEG活动，BIS值也不再下降。这些发现表明，在存在癫痫相关异常EEG活动的情况下，BIS值可能无法准确反映患者的实际意识水平，并且BIS监测仪可能能够追踪此类EEG变化。
