Airway measurements of the volume (V), height (H), and minimum cross sectional area (Min) using Dolphin 11.7 software package.

Abstract

<p>(A). Pink area defines the airway portion of interest, and the green plane locates the minimum cross sectional area. V, H, and Min were automatically calculated; (B). Front view of the evaluated upper airway. The airway was divided into nasopharynx, velopharynx, and hypopharynx by two horizontal planes passing the posterior nasal spine and the tip of the soft palate; (C). Lateral view of the evaluated upper airway.</p