The time to ventilation of the airway devices in the normal scenario had a median value of 8.8 seconds ( interquartile range , 7.3-10 .5 seconds ) for iGEL , 16.1 seconds ( 13.9-19 .3 seconds ) for LMA , 30.6 seconds ( 24.6-37 .6 seconds ) for AWS , and 35.0 seconds ( 29.5-45 .9 seconds ) for MCL .