Implications statement
apnea
This trial evaluates the effect of the association of reverse Trendelenburg position and non-invasive positive pressure ventilation versus beach-chair position without positive pressure ventilation during pre-oxygenation on safe non-hypoxic apnea period. The combination of reverse Trendelenburg and non-invasive positive pressure ventilation increases the safe non-hypoxic apnea period by 41,5 s (19,2%) compared to the ramp position with zero end-expiratory positive pressure ventilation.