Methods : In fixed tidal volume, minute volume and fresh gas flow, the recovery time of isoflurane or enflurane anesthesia with or without in-flow anesthetic gas absorber were compared after closing the vaporizer. 方法:在固定潮气量、每分通气量和新鲜气体流量的条件下,术毕关闭挥发罐后,比较使用回路内麻醉气体吸附装置对回路内麻醉气体浓度变化的影响。