Table I.

VOTE Classification according de Vries et al. ²⁸ (shaded boxes reflect the fact that a specific structure-configuration cannot be seen). Degree of obstruction:

0 No obstruction/vibration < del 50%

1 Partial obstruction/vibration >del 50%< del 75%

2 Complete collapse

X Not visualised

STRUCTURE	DEGREE OF OBSTRUCTION	CONFIGURATION
		A-P	Lateral	Concentric
Velum
Oropharynx lateral walls
Tongue base
Epiglottis