Time required for pre-oxygenation before tracheal intubation
(A) 3 min (B) 5 min (C) 2 min (D) 1 min
(A) 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.