Fig. 2From: Factors influencing nasal airway pressure and comfort in high-flow nasal cannula oxygen therapy: a volunteer studyVisual analog scale. Comfort score. A score of 0 indicates no discomfort; 1, little bit discomfort; 2, little more discomfort; 3, even more discomfort; 4, whole lot more discomfort; 5, worst discomfortBack to article page