Table 1 Statistics of key dimensions of the upper respiratory tract
Key parts | ARLA model and Weibel A model | Angle (°) | |
|---|---|---|---|
Diameter (mm) | Length (mm) | ||
Soft palate | 27*15 | 24.1 | – |
Uvula | 22.7*14 | 6.8 | – |
Epiglottis | 31.2*15 | 39.8 | – |
Trachea | 14.3 | 267.4 | 0 |
Left main bronchus | 8.7 | 50.6 | 25 |
Right main bronchus | 13.1 | 22.2 | 50 |
Left secondary bronchus | 9 | 12.9 | 37 |
Right secondary bronchus | 8.9 | 16.3 | 37 |
Left third bronchus | 6 | 9.3 | 37 |
Right third bronchus | 6.4 | 11 | 37 |