True about endotracheal intubation is:
A i.e. It reduces the normal anatomical dead space - Endotracheal tube decreases the anatomical dead space (150 ml) to as less as 25 ml. - Endotracheal intubation increases the resistance to respiration; obstruction from kinking, foreign body or secretions fuher increase resistance. Subglottic edema, though a complication, is not the most common one.
It reduces normal anatomical dead space
It produces decrease in resistance to respiration
Subglottic edema is most common complication
All of the above
It reduces normal anatomical dead space