What is the primary purpose of using a humidifier in oxygen therapy?

The primary purpose of using a humidifier in oxygen therapy is to prevent drying of the airways. When oxygen is delivered in high concentrations, especially via devices that provide dry gas, it can lead to irritation and dehydration of the respiratory mucosa. This can result in discomfort and complications, such as airway inflammation or increased secretion thickness, which can hinder effective breathing and clearance of secretions.

Humidifiers add moisture to the oxygen, ensuring that the airways remain hydrated and that mucus membranes maintain their natural function. This is particularly important for patients on long-term oxygen therapy, as it helps to keep the airway passages moist and comfortable, minimizing the risk of complications associated with dry airways.

While the other options may present relevant information regarding oxygen therapy, they do not directly address the key function of the humidifier in maintaining airway moisture, which is essential for patient comfort and respiratory health.