Objective To compare the efficacy of ultrasound guided interscalene brachial plexus block(IBPB)with 0.5%ropivacaine hydrochloride and with 0.596%ropivacaine mesylate. Methods Sixty patients under interscalene brachial plexus anesthesia for upper limb operation, were randomly assigned to group A received 0.596% ropivacaine mesylate 30 ml and group B received 0.5%ropivacaine hydrochloride 30 ml with 30 cases each.The efficacy of IBPB was recorded. Results The onset time of ulnar nerve sensory block in group A was significantly shorter than that in group B [(38.30±14.65)min vs.(48.03±22.34)min](P<0.05).The percentage of complete ulner nerve sensory block within 60 min in group A was 96.7%(29/30),which was higher than 66.7%(20/30)in group B(P<0.05).Conclusion Ultrasound guided IBPB with 0.596% ropivacaine mesylate has better ulnar nerve sensory bloc[cade than that with 0.5%ropivacaine hyarochloride.%目的 观察0.596%甲磺酸罗哌卡因和0.5%盐酸罗哌卡因在超声引导下行肌间沟臂丛神经阻滞的效果.方法 60例上肢手术行肌间沟臂丛麻醉的患者,随机均分成两组:A组给予0.596%甲磺酸罗哌卡因30 ml;B组给予0.5%盐酸罗哌卡因30 ml.比较两组感觉及运动阻滞起效时间、阻滞程度、运动恢复时间、镇痛持续时间和不良反应.结果 A组尺神经感觉阻滞起效时间显著快于B组[(38.30±14.65)min vs.(48.03±22.34)min](P<0.05).注药60 min A组尺神经感觉完全阻滞29例(96.7%),显著多于B组的20例(66.7%)(P<0.05).结论 0.596%甲磺酸罗哌卡因的尺神经感觉阻滞优于0.5%盐酸罗哌卡因.
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