Onset time of anesthesia, anesthetic effect, analgesic effect of postoperative 24 hours and adverse effect were observed. The changes of MAP, HR and SpO2 were recorded during brachial plexus block in each group.

• 观察各组麻醉起效时间、麻醉效果、术后24h镇痛效果及不良反应,记录麻醉期间MAP、HR及SpO2的变化。