An Algorithmic Approach to Preoxygenation

Patients who could not reach ETO2 value 90 with tidal volume breathing for 3 min were included in Group TVB tidal volume breathing was continued for 2 min.

Preoxygenation was continued by providing 6cmH2O pressure support to the patients included in this group.

At the 4th minute, preoxygenation was continued by adding 4 cmH2O positive end-expiratory pressure to the same 6 cmH2O pressure support for 1 min in patients whose end-tidal O2 value still reached 90% and who were included in this group.