Table 1.

Baseline information of patients before T-tube placement.

Characteristics	Value (N = 11)
Age (years)	48.05 ± 9.30
Gender (%)
Male	4 (36.4)
Female	7 (63.6)
Underlying disease (%)
Cerebral hemorrhage	1 (9.09)
Craniocerebral trauma	1 (9.09)
Traffic accident trauma	3 (27.3)
Electric injury	2 (18.2)
Cerebral infarction	2 (18.2)
Granulomatous polyangiitis	2 (18.2)
Clinical symptoms (%)
Aphasia	10 (90.9)
Cough	4 (36.4)
Expectoration	6 (54.5)
Dyspnea	5 (45.5)
Stenosis types (%)
Granulation tissue development	5 (45.5)
Scarring stenosis	6 (54.5)
Tracheal wall atrophy	7 (63.6)
Tracheal distortion	6 (54.5)
Airway stenosis length (%)
1 ~ 2 cm	2 (18.2)
2 ~ 3 cm	6 (54.5)
>3 cm	3 (27.3)

Multiple clinical symptoms and stenosis types of patients were complicated. SpO2: blood oxygen saturation.