Generation | Supine | Standing | Generation | Supine | Standing |
---|---|---|---|---|---|
FEV1 | Â | Â | RV | Â | Â |
 Trachea | 0.22 | 0.24 |  Trachea | 0.10 | 0.06 |
 Main bronchus | 0.25 | 0.32** |  Main bronchus | – 0.04 | – 0.08 |
 3rd | 0.43** | 0.50** |  3rd | – 0.18 | – 0.08 |
 4th | 0.38** | 0.50** |  4th | – 0.11 | – 0.07 |
 5th | 0.38** | 0.43** |  5th | – 0.12 | – 0.06 |
 6th | 0.32* | 0.40** |  6th | – 0.05 | – 0.09 |
%FEV1 | Â | Â | %RV | Â | Â |
 Trachea | 0.05 | 0.23 |  Trachea | – 0.13 | – 0.16 |
 Main bronchus | 0.21 | 0.39** |  Main bronchus | – 0.25 | – 0.21 |
 3rd | 0.44** | 0.45** |  3rd | – 0.39* | – 0.33* |
 4th | 0.41** | 0.41** |  4th | – 0.26 | – 0.22 |
 5th | 0.34* | 0.38** |  5th | – 0.21 | – 0.16 |
 6th | 0.21 | 0.29* |  6th | – 0.12 | – 0.13 |
 |  |  | IC/TLC |  |  |
 |  |  |  Trachea | 0.07 | 0.11 |
 |  |  |  Main bronchus | 0.17 | 0.07 |
 |  |  |  3rd | 0.26 | 0.20 |
 |  |  |  4th | 0.12 | 0.08 |
 |  |  |  5th | – 0.01 | – 0.06 |
 |  |  |  6th | – 0.05 | – 0.03 |