Fig. 4
Modified from Madney et al. [19] SOLO vibrating mesh nebulizer was connected to the HFNC system upstream just before the humidifier which was connected to the nasal cannula. Cooled Anderson Cascade Impactor (inhalation flow rate of 15 L min−1) was connected to the nasal cannula for particle size characterization
Schematic diagram showing the measurement of the particle size distribution, by Anderson Cascade Impactor, using high flow nasal cannula system at oxygen flow 5 L min−1.