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目的：观察超声引导下肌间沟臂丛神经阻滞在肩关节脱位手法复位术中的应用效果。方法将急诊拟行肩关节脱位手法复位术患者80例，按随机数字表法分为超声组和传统异感组各40例，均行肌间沟臂丛神经阻滞，观察2组臂丛神经阻滞起效时间、麻醉效果及不良反应发生情况。结果超声组臂丛神经阻滞时间为（10．0±4．2）min短于传统异感组的（17．7±5．9） min，麻醉成功率为95．0％高于传统异感组的80．0％，不良反应发生率为5．0％低于传统异感组的20．0％，差异均有统计学意义（P＜0．05）。结论超声引导下肌间沟臂丛神经阻滞在肩关节脱位手法复位术中麻醉起效时间快，麻醉效果好，术后不良反应发生率低。“,”Objective To observe the effect of ultrasound-guided interscalene brachial plexus block in reduction of shoulder dislocation .Methods 80 patients underwent radical resection of shoulder dislocation were divided into two groups according to the method of random number table:ultrasound group and traditional group ,each of 40 cases.All of them were per-formed interscalene brachial plexus block .The onset time ,anesthetic effect and adverse reaction of brachial plexus block were observed.Results The time of brachial plexus block in ultrasound group was (10.0 ±4.2)min shorter than (17.7 ±5.9)min in traditional group,the success rate of block in ultrasound group was 95.0%higher than 80.0%of traditional group,the inci-dence of adverse reactions was 5.0%lower than 20.0% of traditional group,the difference was statistically significant (P<0.05).Conclusion Ultrasound-guided interscalene brachial plexus block in reduction of shoulder dislocation has a faster on -set time of anesthesia ,the anesthetic effect is good ,after a low incidence of adverse reactions .