Suzuki I, Kanabuchi K, Koide S, Kawada S, Shohtsu A
First Department of Surgery, Tokai University School of Medicine, Kanagawa, Japan.
Nihon Geka Gakkai Zasshi. 1988 Jul;89(7):1083-92.
The EEG was monitored in fifty-four patients during and after various surgeries requiring cardiopulmonary bypass (CPB) to assist in the early detection of central nervous system dysfunction (CNSD). Bilateral frontopolar EEG signals were processed with a 2-channel, real-time Fast-Fourier-Transformer (FFT) analyser and Compressed Spectral Arrays (CSA) were obtained. The fifty-four patients were divided into 3 groups based upon clinical outcome; Group 1: patients without CNSD (83%); Group 2: patients with delayed recovery from anesthesia but without CNSD (4%); and Group 3: patients with apparent postoperative CNSD (13%). There was no difference in the CSA among these groups prior to rewarming, but after the rewarming phase, two distinct sets emerged. Groups 1 and 2 showed a shift of the CSA predominant peak from a low frequency to a higher frequency. On the other hand, Group 3 patients demonstrated either stable predominant peaks in the lower frequencies or gradual flattening of the CSA. We conclude that the intra-operative EEG monitoring is a useful tool for the early detection of CNSD during and after CPB.
在54例接受各种需要体外循环（CPB）的手术的患者术中及术后监测脑电图（EEG），以协助早期发现中枢神经系统功能障碍（CNSD）。使用双通道实时快速傅里叶变换（FFT）分析仪处理双侧额极EEG信号，并获得压缩谱阵图（CSA）。根据临床结果将54例患者分为3组；第1组：无CNSD的患者（83%）；第2组：麻醉恢复延迟但无CNSD的患者（4%）；第3组：术后明显出现CNSD的患者（13%）。复温前这些组之间的CSA没有差异，但在复温阶段后，出现了两组不同的情况。第1组和第2组显示CSA主峰从低频向高频转移。另一方面，第3组患者要么在较低频率下有稳定的主峰，要么CSA逐渐变平。我们得出结论，术中EEG监测是CPB期间及术后早期检测CNSD的有用工具。
