Mechanisms Underlying Improvement in Obstructive Sleep Apnea Syndrome by Uvulopalatopharyngoplasty

Figure 2

Three-dimensional model of the upper airway and cross-sectional area data alongside the airway in patient 1. The morphological characteristics of the upper airway are markedly changed after UPPP. However, there is little change in the upper airway volume after UPPP (11.28 cm³ before and 11.78 cm³ after UPPP).