Table 1.
Basic Characteristics of patients
| The Cause of obstruction | Total | Primary tumor | Tumor metastasis | Artificial airway | P value |
|---|---|---|---|---|---|
| Number | 29 | 17 | 7 | 5 | |
| Age | 52 (46–69) | 57 (43–68) | 57 (51–71) | 27 (19–52) | 0.040 |
| Gender (male, %) | 18 (62.1) | 11 (64.7) | 4 (57.1) | 3 (60) | 0.939 |
| ASA Classification | 0.280 | ||||
| II | 1 (3.4) | 0 | 1 (14.2) | 0 | |
| III | 15 (51.7) | 11 (64.7) | 1 (14.2) | 3 (60) | |
| IV | 11 (37.9) | 6 (35.3) | 3 (42.8) | 2 (40) | |
| V | 2 (6.8) | 0 | 2 (28.6) | 0 | |
| Position of obstruction | 0.830 | ||||
| I | 12 (41.4) | 6 (35.3) | 3 (42.8) | 3 (60) | |
| II | 8 (27.6) | 5 (29.4) | 2 (28.6) | 1 (20) | |
| III | 2 (6.8) | 1 (5.9) | 1 (14.2) | 0 | |
| IV | 5 (17.2) | 3 (17.6) | 1 (14.2) | 1 (20) | |
| V | 2 (6.8) | 2 (11.8) | 0 | 0 | |
| Narrowest Airway Diameter (mm) | 4.5 (2–5) | 3 (2–4) | 3 (2–5) | 5 (2.5–5.5) | 0.268 |
| Artificial Airway (Yes, %) | 16 (55.1%) | 9 (52.9%) | 3 (42.9%) | 4 (80%) | 0.438 |
Position of obstruction: I = Upper third of the trachea; II = Middle third of the trachea; III = Lower third of the trachea; IV = Right main bronchus; V = Left main bronchus
ASA Classification, American Society of Anesthesiologists Physical Status Classification System