Table 3. The sites and degrees of obstruction determined by drug-Induced sleep endoscopy.
| Classification of obstruction | Overall (n = 36) | Degree of obstruction |
||
|---|---|---|---|---|
| Patency | Partial obstruction | Complete obstruction | ||
| Site of obstruction- the VOTE classification39 | ||||
| Velopharynx | 36 (100) | 0 (0) | 18 (50) | 18 (50) |
| Oropharynx | 32 (89) | 4 (11) | 27 (75) | 5 (14) |
| Tonsils | 18 (50) | 18 (64) | 15 (42) | 3 (8) |
| Lateral walls | 13 (36) | 23 (63) | 11 (31) | 2 (6) |
| Tongue base | 24 (67) | 12 (33) | 3 (8) | 21 (58) |
| Epiglottis | 14 (39) | 22 (61) | 14 (39) | 0 (0) |
| Level of obstruction | ||||
| Simple velopharynx obstruction | 21 (58) | 0 (0) | 12 (33) | 9 (25) |
| Multi-level obstructionA | 15 (42) | 0 (0) | 0 (0) | 15 (42) |
NOTE: Numbers are n (%).
APatients with at least two sites of complete obstruction.
VOTE, velopharynx, oropharynx, tongue base, and epiglottis.