数量化脑电参数对异丙酚、咪唑安定或氯胺酮麻醉病人镇静深度监测的准确性  

Quantitative electroencephalographic analysis as a tool for predicting the depth of sedation of sedation induced by propofol, midazolam and ketamine

作　　者：张德林[1] 庄小凤[1] 裘卫东 蒋豪[1] 薛张纲[1] 

机构地区：[1]复旦大学附属中山医院麻醉科 [2]浙江省临海市第一人民医院麻醉科

出　　处：《中华麻醉学杂志》2005年第3期179-182,共4页Chinese Journal of Anesthesiology

摘　　要：目的评价脑电图双频谱指数(BIS)、95%边缘频率(95%SEF)对异丙酚、咪唑安定或氯胺酮麻醉病人镇静深度监测的准确性。方法择期行胸、腹部手术病人45例,ASAⅠ或Ⅱ级,年龄30-59岁,随机分为3组:异丙酚组(P组)、咪唑安定组(M组)和氯胺酮组(K组),每组15例。P、M、K组分别以8、0.5、4mg·kg-1·h-1的速率静脉输注药物,每3min行进行警觉/镇静(OAA/S)评分一次,直到OAA/S评分达1分停止给药。记录每次评分即刻的BIS及95%SEF。分析BIS、95%SEF与OAA/S评分的相关性,计算病人意识消失时BIS50、95%SEF50、相应95%可信区间及BIS、95%SEF预测镇静深度的概率(Pk)。结果P、M组BIS、95%SEF与OAA/S评分间具有相关性,K组BIS和95%SEF与OAA/S评分间无相关性。P、M组BIS50分别为65.9、70.7,但是无法计算K组相应的BIS50和95%SEF50。P、M组BIS和95%SEF的Pk均高于0.5(P<0.01),K组BIS和95%SEF的Px与0.5比较差异无统计学意义(P>0.05);P组BIS及95%SE'的Pk均高于M组(P<0.05);P、M组BIS的Pk均高于95%SEF的Pk(P<0.05)。结论BIS和95%SEF可以准确地监测异丙酚的镇静深度,对咪唑安定镇静深度监测的准确性稍差,而对氯胺酮镇静深度无法监测,BIS对麻醉药镇静深度监测的准确性较95%SEF高。Objective To evaluated the acccuracy of the two quantitative electroencephalographic parameters-bispectral index (BIS) and 95% specrral edge frequency (95% SEF) for measuring the depth of sedation induced by propofol, midazolam and ketamine. Methods Forty-five ASA Ⅰ - Ⅱ patients aged 30-59 yr weighing 46-80 kg scheduled for elective general thoracic or abdominal surgery were randomized to receive an infusion of propofol at a rate of 8 mg·kg-1·h-1 (group P , n = 15) or midazolam at 0.5 mg·kg-1·h-1 (group M, n = 15) or ketamine at 4 mg·kg-1· h-1 (group K, n = 15) . The patients were unpremedicated. The depth of sedation was assessed using OAAS scale (5 = wide awake , 1 = no response to prodding or shaking ) at 3 min intervals. BIS and 95 % SEF were continuously monitored. The BIS and 95% SEF values at each OAAS score (5-1) were recorded. The relations between BIS, 95 % SEF and sedation scores were determined in each group. The ED50 values of BIS and 95% SEF50 for loss of consciousness and their 95% confidence internals were calculated. Prediction probability(Pk) values for BIS and 95% SEF were compared among the drugs. Results There were no significant differences among the 3 groups with respect to age, body weight, sex and duration of drug infusion. With increasing sedation there was a progressive decrease in BIS and 95 % SEF values in group P and M but no significant changes in BIS and 95 % SEF values were seen in group K. The BIS and 95 % SEF positively correlated with OAAS score in group P and M but not in group K. The BIS50 was 65.9 in group P and 70.7 in group M,but inestimable in group K.The 95% SEF50 was 20.4 in group P and inestimable in group M and K. The Pk values for BIS and 95 % SEF were higher in P group than in M group and were not significantly different from 0.5 indicating a very poor predictive performance . Conclusion The accuracy of BIS and 95 % SEF for assessing the depth of sedation is greater with propofol. BIS is more sensitive than 95% SEF for the same anesthesia.

关 键 词：深度监测 咪唑安定 麻醉病人 异丙酚 准确性 氯胺酮 脑电参数 数量化 脑电图双频谱指数 BIS50 OAA/S评分 腹部手术病人 静脉输注药物 镇静深度 SEF 相关性 边缘频率 意识消失 可信区间 ASA 统计学 麻醉药 

分 类 号：R614[医药卫生—麻醉学] R473.6[医药卫生—外科学]