Effects of cardiopulmonary bypass and hypothermia on electroencephalographic variables
Effects of cardiopulmonary bypass and hypothermia on electroencephalographic variables
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DOI：
10.1111/j.1365-2044.1997.229-az0364.x
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发表时间：
1997-11-01
期刊：
影响因子：
10.7
通讯作者：
Kenny, GNC
中科院分区：
文献类型：
--
作者：
Doi, M;Gajraj, RJ;Kenny, GNC
我们研究了低温和体外循环（CPB）对12名患者在无事件心脏麻醉期间四种麻醉深度监测仪的影响：频谱边缘频率（SEF），中值频率（MF），脑电双频指数（BIS）和听觉诱发电位指数（AEPIndex）。在麻醉期间的10个阶段同时记录每个变量。所有四个变量都没有受到过渡到CPB的影响。低温时AEPIndex、MF和SEF值分布较紧密，而BIS值变化较大，与麻醉诱导前重叠。复温期间变异性降低。AEPIndex在整个麻醉过程中的值从未与麻醉诱导前的值重叠。在心脏搭桥手术的四个变量中，AEPIndex是最稳定和可靠的麻醉深度监测。
We studied the effects of hypothermia and cardiopulmonary bypass (CPB) on four depth of anaesthesia monitors; spectral edge frequency (SEF), median frequency (MF), bispectral index (BIS) and auditory evoked potential index (AEPIndex) in 12 patients during uneventful cardiac anaesthesia. Each variable was recorded simultaneously at 10 periods during anaesthesia. All four variables were not affected by the transition to CPB. During hypothermia, values of AEPIndex, MF and SEF were tightly distributed but values of BIS were very variable and overlapped with those before induction of anaesthesia. The variability decreased during rewarming. The values of AEPIndex throughout the anaesthesia never overlapped with those before induction of anaesthesia. The AEPIndex was the most stable and reliable as a depth of anaesthesia monitor among the four variables in cardiac bypass surgery.