The upper ranges of normal vestibular aqueduct widths

Plane and PercentileSize (mm)
All Ears(n = 146)Left Side(n = 73)Right Side(n = 73)
Opercular
    Maximum3.43.42.7
    99th2.73.42.7
    97.5th2.32.32.4
    95th1.92.01.9
    90th1.71.71.5
    75th1.21.21.1
    50th0.90.90.8
Midpoint
    Maximum1.81.81.3
    99th1.31.81.3
    97.5th1.21.21.2
    95th0.90.81.0
    90th0.70.70.7
    75th0.40.40.4
    50th0.20.20.2