Fig. 3

Changes of respiratory parameters after inflation during operation. 5 min, 10 min, 20 min, 1 h are the post-inflatable time period. A–E showed the intraoperative changes of Peak AP, ETCO₂, OI, PH and PaCO₂, respectively. After inflation, Peak AP, ETCO₂ and PaCO₂ increased significantly, while OI and PH decreased significantly. The baseline level can be gradually restored after gas shutdown