Table 1 Evaluation criteria for pathological changes in the tracheal ring
Histopathological scores | Histopathological changes in tracheal rings |
|---|---|
0 (no lesion) | Normal cilia movement around the tracheal ring tissue culture, no shedding of epithelial cells |
1 (mild) | 50–95% of cilia around the tracheal ring tissue culture stop moving, epithelial cells do not shed |
2 (moderate) | Tracheal ring tissue cultures with more than 95% cilia cessation of motility around them and incomplete shedding of epithelial cells |
3 (severe) | Tracheal ring tissue cultures without a single ciliary movement around the perimeter, with epithelial cell shedding |