Methods: 75 cases subject to selective modified radical mastectomy under epidural anesthesia were randomly divided into 3 groups: Droperidol and pethidine group(group A, n=25) , midazolam group(group B, n=25), propofol group(group C, n=25).

• 方法:75例择期于硬膜外麻醉下行改良乳癌根治术的老年患者随机分为3组,氟杜组(A组,n=25),咪达唑伦组(B组,n=25)及丙泊酚组(C组,n=25)。