Table 3 Summary of clinical characteristics of the patients in the retrieved articles and the present study

Total

476

Malignant stricture

85

Bronchial carcinoma

78

Magligance

7

Benign stricture

391

Endotracheal intubation

84

Tracheal tuberculosis

72

Prolonged mechanical ventilation

11

Lung transplantation

166

Lung carcinoma

4

Wegener’s granulomatosis

6

Idiopathic stenosis

4

Post-Tracheostomy

31

Sarcoidosis

3

Amyloidosis

2

Unknown

1

Ventilation mode

Intermittent ventilation

7

Ventilation ducts

13

dilation duration

10-30 s

256

30s-1 min

3

1-3 min

2

40 min

1

Ballon pressure (atm)*

<3

3

3-5

81

>5

3

Outcome

Valid

176

Invalid

25

Follow-up (months)

0-6

79

6-12

2

>12

395

Complication

Granulation tissue formation

30

Tracheoesophegial fistula

1

Tracheal laceration

4

Bronchospasm

1

Laceration of bronchial artery

1