Methods:30 patients who received thoracic operation were divided randomly into the observation group(group A,n=15) and the control group(group B,n=15).

• 方法:30例胸科手术患者随机分为观察组(A组n=15)和对照组(B组n=15),A组采用全身麻醉联合硬膜外阻滞的方法,B组仅用全麻。