Baseline functional tests were as follows,mean FEV 1=0.89 L,mean postoperative FEV1 increased by 50% in bilateral LVRS over 32% in unilat-eral LVRS.

• 术前第 1秒用力呼气量 (FEV1)平均 0 89L ,气急指数 2 4 0。 结果 双侧LVRS术后FEV1平均提高 5 0%25 ,单侧LVRS术后FEV1平均提高仅 32%25。