Time required for pre-oxygenation before tracheal intubation
3 min
5 min
2 min
1 min
Preoxygenation before intubation : Process of replacing nitrogen in the lungs with oxygen. Preoxygenation with tidal volume breathing of 3 mins is required before tracheal intubation. This delays the onset of critical hypoxia during the period of apnea by 5-8 minutes.