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目的研究超声引导下锁骨上臂丛神经阻滞在肥胖患者上肢手术应用中的可行性，为临床治疗提供理论指导。方法选择2012年6月~2014年6月于我院就诊的72例行上肢手术的肥胖患者为研究对象。随机平均分为观察组和对照组各36例，其中观察组在超声引导下进行锁骨上臂丛神经阻滞，对照组采用传统的异感法进行锁骨上臂丛神经阻滞。比较两种操作完成时间，臂丛神经阻滞起效时间、阻滞效果以及并发症发生情况。结果观察组的操作完成时间和臂丛神经阻滞起效时间均明显短于对照组，差异具有统计学意义(<0.05)。观察组阻滞效果的得优率也显著高于对照组(<0.05)。与对照组相比，观察组的并发症发生率明显较低，差异具有统计学意义(<0.05)。结论与传统异感法相比，在肥胖患者上肢手术中行超声引导下锁骨上臂丛神经阻滞能够显著地缩短操作时间和阻滞起效时间，效果好且并发症少，安全可靠。“,”Objective To study the feasibility of brachial plexus block guided by ultrasound in obese patients with limb surgery,providing theoretical guidance for clinical treatment.Methods Selected 72 cases obese patients with limb surgery from June 2012 to June 2014 in our hospital 72 routine for the study and randomly divided them into observation group and control group,36 cases of each group.The observation group conduct brachial plexus block guided by ultrasound,the control group conduct brachial plexus block with the traditional susceptibility positioning method.Compared the time to complete the operation,brachial plexus block starting time,block ef ects and postoperative complications.Results The time of completing the operation and brachial plexus block starting the observation used was significantly shorter than the control group,the dif erence was statistical y significant ( <0.05).The superior rate of observation group with block ef ects was significantly higher ( <0.05).Compared with the control group,the rate of postoperative complications were significantly lower,the dif erence was statistical y significant ( <0.05).Conclusion Compared with the traditional susceptibility positioning method,brachial plexus block guided by ultrasound in obese patients with limb surgery can significantly decrease the operating time and block starting time.It has bet er ef ect and less complications and ti is quite safe.