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Preoperative assessment
| PARAMETERS | GROUPS | No. of PATIENTS |
|---|---|---|
| Sex | Male | 3 |
| Female | 1 | |
| Duration of intubation + tracheostomised period | Less than 15 days | 2 |
| More than 15 days | 2 | |
| Grade of stenosis | III | 2 |
| IV | 2 | |
| tracheal involvement | - | 3 |
| Vocal cord mobility | normal | 3 |
| Bilateral paralysis | 1 |
