Humidifier Use with Oxygen Therapy in COPD Patients

Introduction to Humidification in COPD

The British Thoracic Society recommends that dry (non-humidified) oxygen is the standard approach for most COPD patients, with humidification only considered in specific circumstances 3

COPD patients with a tracheostomy must receive humidified oxygen because the natural upper airway warming and moistening mechanisms are bypassed, as recommended by the British Thoracic Society 1, 2, 3
Heated humidification should be considered in COPD patients with viscous secretions and difficult expectoration, based on expert opinion rather than randomized trials, as stated by the British Thoracic Society 2, 4
Heated humidification may be considered in COPD patients receiving high-flow oxygen (> 24 hours) with patient-reported significant upper airway discomfort, according to the British Thoracic Society guidelines 3, 4

Bubble bottles should never be used for humidification due to infection risk without clinical benefit, as warned by the British Thoracic Society 1, 2, 3
Water used in heated humidifiers must be sterile to prevent infection, as recommended by the British Thoracic Society 4
Target oxygen saturation should be 88-92% in COPD patients at risk of hypercapnic respiratory failure, according to the British Thoracic Society guidelines 5
When nebulized bronchodilators are needed, compressed air (not oxygen) should be used to drive nebulizers to avoid worsening hypercapnia, as recommended by the British Thoracic Society 1, 5