Table 5 Different stages of cicatricial lesions forced expiratory volume in 1 s (FEV1)
Group | n | Internal diameter of tracheal stenosis before the first interventional therapy (FEV1, L, mean ± standard deviation) | Internal diameter of tracheal stenosis Mid-term (3 months after the operation) (FEV1, L, mean ± standard deviation) | Internal diameter of tracheal stenosis Long-term (12 months and above after the operation) (FEV1,L, mean ± standard deviation) |
|---|---|---|---|---|
Scar hyperplasia | 32 | 1.37 ± 0.26 | 1.83 ± 0.32 | 1.82 ± 0.24 |
Repair under scar formation | 32 | 1.45 ± 0.34 | 1.94 ± 0.21 | 1.91 ± 0.23 |
Mature scars | 32 | 1.34 ± 0.41 | 1.87 ± 0.39 | 1.81 ± 0.44 |