Objective: to evaluate the changes of airway obstruction. Method: data came from cephalo-metric X-ray, CT scans, and PSG records. Results: 11 cases in this series, which ANB angle changed from -3.47+-3.60掳 to 7.16+-3.41 掳. The A point moved forward 20.27+-8.04mm. The airway section area at PNS level increased from 68.1+-41.1 mm~2 to 278.4+203.1 mm~2 and that at U level changed from 89.6+-72.4 mm~2 to 154.8+-68.3 mm~2 with a significant statistic difference. The total upper airway volume significantly increased from 14.2+-5.6 ml to 23.3+-11.4 ml after midface distraction osteo-genesis. In the PSG records of this group, the apnea hypopnea index (AHI) decreased from 14.1+-9.4/hr to 3.2+-2.2/hr. The SaO2<=90% sleeping time shortened from 56.0+-26.5 minutes to 2.9+-2.7 minutes. The snoring index decreased from 95.9+-79.0 to 21.5+-17.6. Conclusion: comprehensive assessment is efficacy for evaluating the airway obstruction.
展开▼
