Why should oxygen be humidified for long-term use?

Humidifying oxygen for long-term use is essential primarily to prevent mucosal dryness and irritation. When oxygen is delivered at high concentrations, especially in a continuous or prolonged manner, it can dry out the mucous membranes of the respiratory tract. This dryness can lead to discomfort, damage to the mucosal surfaces, and increased risk of respiratory infections due to impaired mucosal function.

The respiratory system is designed to work with humidified air, as the air we breathe naturally contains moisture. When supplementary oxygen is delivered without adequate humidity, the natural balance is disrupted, resulting in symptoms such as a dry throat, nasal irritation, and increased secretions.

Proper humidity levels help maintain the integrity of the mucosal layer, ensuring it remains moist and healthy, which is crucial for effective lung function and overall respiratory health. Thus, the practice of humidifying oxygen in long-term therapy is not just a comfort measure; it is a necessary aspect of respiratory care.