瑞芬太尼抑制患儿臂丛神经阻滞穿刺诱发体动反应的半数有效血浆靶浓度  

Median effective target plasma concentration of remifentainil inhibiting body movement evoked by puncture during brachial plexus block in pediatric patients

作　　者：朱志鹏[1] 沈颖彦[1] 吴军民[1] 肖旺频[1] 

机构地区：[1]嘉兴学院附属第二医院麻醉科,314000

出　　处：《中华麻醉学杂志》2013年第10期1236-1238,共3页Chinese Journal of Anesthesiology

摘　　要：目的 确定瑞芬太尼抑制患儿臂丛神经阻滞穿刺诱发体动反应的半数有效血浆靶浓度（Cp50）.方法 择期前臂或手外科手术患儿,年龄5～12岁,性别不限,发育正常,麻醉前30 min口服咪达唑仑0.2 mg/kg.瑞芬太尼初始血浆靶浓度5.0 ng/ml,采用序贯法确定其血浆靶浓度,穿刺诱发体动反应时下一例上调1级浓度,否则下调1级浓度,相邻浓度比值1.2.血浆靶浓度和效应室浓度达到平衡时,行臂丛神经阻滞穿刺.体动反应判断标准：穿刺诱发的肢体或/和头颈部的运动反应.计算其Cp50及95％可信区间.结果 瑞芬太尼抑制臂丛神经阻滞穿刺诱发体动反应的Cp50为3.9ng/ml,其95％可信区间为3.6～ 4.2 ng/ml.结论 瑞芬太尼抑制患儿臂丛神经阻滞穿刺诱发体动反应的Cp50为3.9 ng/ml.Objective To determine the median effective target plasma concentration （Cp50） of remifentainil inhibiting body movement evoked by puncture during brachial plexus block in pediatric patients.Methods Pediatric patients of both sexes,aged 5-12 yr,who grown normally,scheduled for elective forearm or hand surgery,were enrolled in this study.Children were premedicated with oral midazolam 0.2 mg/kg at 30 min before anesthesia.The initial target Cp of remifentainil was 5.0 ng/ml.The target Cp was determined by up-and-down sequential method.Each time Cp increased/decreased by 20％ in the next patient depending on the response of the previous patient to puncture.The ratio between the two successive concentrations was 1.2.The puncture was performed after the target effect-site and plasma concentrations were balanced.Body movement was defined as puncture-induced movement of truncus,limbs and/or head and neck.The Cp50 and 95 ％ confidence interval of remifentainil were calculated by Dixon method.Results Cp50 of remifentainil inhibiting body movement evoked by puncture during brachial plexus block was 3.9 ng/ml,and 95 ％ confidence interval was 3.6-4.2 ng/ml.Conclusion Cp50 of remifentainil inhibiting body movement evoked by puncture during brachial plexus block is 3.9 ng/ml in pediatric patients.

关 键 词：哌啶类 运动活动 剂量效应关系 药物 药物投与系统 儿童 臂丛 神经传导阻滞 

分 类 号：R726.1[医药卫生—儿科]