Objective To evaluate the clinical effects of butorphanol preemptive analgesia on brachial plexus block with ropivacaine.目的评价布托啡诺超前镇痛对罗哌卡因臂丛阻滞效果的影响....

布托啡诺...

butorphanol的音标：butorphanol的英式发音音标为：[bju:'tɔ:fənəl]butorphanol的美式发音音标为：[bju'tɔfənəl]...