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Type of obstruction in the upper airway.
| Type of collapse in upper airway | Number of patients (N = 51) |
|---|---|
| Palatal collapse | 50 (98.0%) |
| (i) Concentric | 27 (54.0%) |
| (ii) Anteroposterior | 21 (42.0%) |
| (iii) Laterolateral | 2 (4.0%) |
| Oropharyngeal collapse | 45 (88.2%) |
| (i) Concentric | 1 (2.2%) |
| (ii) Laterolateral | 44 (97.8%) |
| Tongue base collapse | 31 (60.8%) |
| (i) Anteroposterior | 31 (100.0%) |
| Epiglottis collapse | 16 (31.4%) |
| (i) Laterolateral | 2 (12.5%) |
| (ii) Anteroposterior | 14 (87.5%) |
