Following axillary plexus blockade , neither patient group showed any statistically significant difference in the percentage of functionally successful blockade ( @ mL , @ % : @ mL , @ % ; P = @ ) , surgically successful blockade ( @ mL , @ % ; @ mL , @ % ; P = @ ) , cumulative sensory or motor blockade surgical time , block performance time , preoperative midazolam use , or intraoperative propofol use .