Assessment of differences in pressure and comfort using different nasal cannulas
EEP
The EEP, EIP, and comfort were measured with different nasal cannulas using the HFT-300 device. The flow rate was gradually increased from 0 to 60 L/min in increment of 10 L/min, and the recording began after the participant had taken five stable breaths. The respiratory pressure was recorded for 2 minutes, with a 5-minute rest before each flow rate adjustment (washout period). After measurement of each flow rate, comfort was assessed using a visual analogue scale (Fig. Visual 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 discomfort