What is the main purpose of using a humidifier during mechanical ventilation?

The main purpose of using a humidifier during mechanical ventilation is to maintain adequate moisture in the inspired air. When patients are mechanically ventilated, especially through artificial airways such as endotracheal tubes, the natural humidification process provided by the upper airway is bypassed. This can lead to dryness and irritation of the respiratory tract, which may cause complications such as thick secretions, airway obstruction, or damage to the mucosal lining.

By incorporating a humidifier, the ventilation system delivers air that is adequately warmed and humidified, allowing for better comfort for the patient and promoting the health of the airway. Proper humidification aids in the prevention of complications associated with mechanical ventilation by keeping the secretions moist and more manageable, which in turn supports effective airway clearance and gas exchange.