Cormack-Lehane classification system for assessment of laryngeal view
| Grade | Description | Best C-L grade in control videos (n=30), n (%) | Best C-L grade in intervention videos (n=15), n (%) | C-L grade when inserting ETT in control videos (n=25)*, n (%) | |
| 1 | Full view of glottis | 17 (57) | 11 (73) | 8 (32) | 8 (57) |
| 2 | Partial view of glottis | 6 (20) | 2 (13) | 11 (44) | 4 (29) |
| 3 | Only epiglottis seen, none of glottis seen | 5 (17) | 0 (0) | 2 (8) | 0 (0) |
| 4 | Neither glottis nor epiglottis seen | 2 (7) | 2 (13) | 4 (16) | 2 (14) |
*In five attempts there was no insertion of ETT.
†In one attempt there was no insertion of ETT.
C-L, Cormack-Lehane classification system.