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分娩第一产程时布比卡因硬膜外镇痛最低有效浓度的研究 |
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曹小平
摘要 目的:探讨并比较硬膜外布比卡因分娩镇痛在第一产程不同阶段的最低局麻药镇痛浓度(MLAC)。方法:随机将60例产妇分为A(潜伏期)、B(活跃期)组,首例均用0.1%布比卡因15ml,其后根据前一例产妇对高或低浓度布比卡因药液的反应,依次变动局麻药的浓度,VAS≤10mm为有效。结果:A组MLAC为0.05%,B组MLAC为0.142%;B组MLAC显著高于A组(P<0.0001)。结论:第一产程硬膜外布比卡因镇痛的有效浓度为0.05%~0.142%,随产程进展而增高。 关键词 分娩镇痛 硬膜外腔 布比卡因
Clinical Investigation of Minimum Local Analgesic Concentration of Extradural Bupivacaine in Labor
Cao Xiaoping Department of Anaesthesiology,Affiliated Hospital of North Sichuan Medical College 637007
Abstract Objective:To investigate the MLAC of bupivacaine at first stage of labor.Methods:60 parturients at labor were randomily,divided into group A(early stage)and B(active stage).The first dose was 15ml of 0.1% bupivacaine.The concentration of bupivacaine used in the following parturients was determined by the previous womans respones and was readjusted to a higher or lower concentration with 0.01% stepwise of bupivacaine according to up-down sequential allocation.Efficacy was assessed using VAS 100mm.VAS≤10mm to be judged effective.Results:In group A,the MLAC of bupivacaine was 0.05%,and 0.142% in group B.The MLAC of bupivacaine in group B was greater compared with the MLAC in group A(P<0.0001).Conclusion:The MLAC of bupivacaine at first stage of labor is at the range of 0.05%-0.142%,and subjected to increase with the advance of labor. Key words Obstetric analgesia Extradural space Bupivacaine
硬膜外分娩镇痛所用局麻药浓度与镇痛强度、运动神经阻滞、器械助产率直接相关,目前有关硬膜外分娩镇痛药物剂量-效应关系方面的资料尚少。本研究旨在探讨并比较硬膜外布比卡因分娩镇痛在第一产程不同阶段的最低局麻药镇痛浓度(MLAC),以期作为临床用药参考。
资料与方法
一般资料 60例产妇,ASAⅠ~Ⅱ级,单胎、头位,均未使用阿片类药或镇静药,第一产程要求硬膜外镇痛。随机分为A、B两组,L2~3间隙直入法硬膜外穿刺,头向置管3cm,均不给试验量。用药前均用VAS法对疼痛评分并作记录。 方法 A组:第一产程潜伏期,有规律宫缩开始至宫口开至2cm时给药;B组:第一产程活跃期宫口开至5cm时给药,A、B组第一例均用生理盐水配制的0.1%布比卡因药液15ml。其后,按0.01%级差用生理盐水分别配制0.01%~0.20%布比卡因局麻药液15ml备用,并根据前一例产妇对所接受的布比卡因浓度的VAS镇痛评分而变动局麻药浓度(0.01%为一递增或递减梯度),监测产妇的BP、HR、宫缩频率及胎心。如果给药后有效,下一例产妇直接按0.01%布比卡因浓度递减;若给药后3[1] [2] 下一页 上一个医学论文: 罗比卡因硬膜外分娩镇痛的临床研究 下一个医学论文: 硬膜外连续泵注芬太尼与布比卡因用于分娩镇痛的临床研究
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