Forced expiratory volume at 1st s (FEV1.0), forced volume capacity (FVC), FEV1.0/ FVC and peak expiratory flow (PEF) were measured preoperatively and then daily after surgery.

• 术前及术后每日测定用力肺活量 (FVC) ,第一秒用力呼气量 (FEV1 0 ) ,第一秒用力呼气量占用力肺活量的百分率 (FEV1 0 FVC)及呼气流量峰值(PEF)。