Post-anesthesia recovery was significantly more rapid in Group A than in Group B , in terms of times to spontaneous breathing return ( 7.2 1.4 min vs. 10.9 1.6 min , P < 0.001 ) , consciousness return ( 7.4 1.5 min vs. 12.3 1.8 min , P < 0.001 ) , removal of tracheal intubation ( 8.1 1.5 min vs. 13.2 1.7 min , P < 0.001 ) and operating room discharge ( 12.7 1.4 min vs. 22.1 1.3 min , P < 0.001 ) .