Table 2.
Percentage of mass aerosol deposition across compartments with different flow rates using the heated/humidified HFNC system.
| Compartment | 10 L/min (n = 8) |
30 L/min (n = 7) |
50 L/min (n = 8) |
p-Value |
|---|---|---|---|---|
| Lung (%) | 17.23 ± 6.78 | 5.71 ± 2.04 * | 3.46 ± 1.24 ** | <0.001 # |
| Upper airway (%) | 34.48 ± 10.25 | 42.10 ± 13.92 | 46.07 ± 8.45 | 0.213 |
| Stomach (%) | 0.37 ± 0.15 | 1.05 ± 1.12 | 0.35 ± 0.49 | 0.116 |
| Nebulizer (%) | 13.57 ± 7.42 | 9.43 ± 6.30 | 10.30 ± 7.12 | 0.437 |
| Cannula (%) | 8.78 ± 3.63 | 13.18 ± 3.32 *** | 18.40 ± 3.48 ** | <0.001 |
| Tubing (%) | 21.93 ± 4.90 | 24.99 ± 9.31 | 23.41 ± 7.17 | 0.720 |
| Humidifier (%) | 12.21 ± 5.47 | 16.79 ± 9.68 | 10.95 ± 1.87 | 0.201 # |
| Exp Filter (%) | 11.40 ± 3.65 | 5.68 ± 3.17 * | 6.82 ± 4.00 | 0.014 |
Data is expressed as percentage (mean ± standard deviation). One-way ANOVA and # Kruskal–Wallis Test. p < 0.05. * 10 L/min × 30 L/min, ** 10 L/min × 50 L/min, *** 30 L/min × 50 L/min.