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Degree of tracheal stenosis according to Cotton- Mayer
| Degree of tracheal stenosis (%) | Number of patients | Percentage % |
|---|---|---|
| Grade: luminal narrowing <50% | 03 | 18.75 |
| Grade 2: luminal narrowing 51…. < 71% | 06 | 37.5 |
| Grade 3: luminal narrowing 71…. < 99% | 05 | 31.25 |
| Grade 4: luminal narrowing >99% | 02 | 12.5 |
| Total | 16 | 100 |
