Abstract: To investigate the differences of airway space pre-operatively and post-operatively using X-ray projection in patients with hyoid suspension and uvolopalatopharyngoplasty surgeries and to provide a morphological basis for the treatment of glossopharyngeal　stegnosis. Methods30 patients with moderate or serious OSAHS were diagnosed with stegnosis both on glossopharyngeal and palatopharyengeal　planes using polysomnography（PSG） and the Müller test. All patients underwent hyoid suspension and uvolopalatopharyngoplasty surgeries and a pre-and post-operative follow-up of one year, and PSG as well as X-ray projection were used to analyze the therapeutic efficacy. ResultsA one-year follow-up indicated that the apnea hyponea index decreased from 63±11.23 to 19±4.52. Based on the standard set up in the Hangzhou meeting, 12 cases (40.00%) were healed, 10(33.33%) had excellent effects, 3(10.00%) had effects, and 5 had no effects (16.67%), and the total effective rate was 83.33%. X-ray projection showed superioranterior displacement of hyoid bones and enlarged posterior space. ConclusionsHyoid suspension surgery can treat patients with OSAHS suffering from glossopharyngeal stegnosis by dragging the hyoid bone anterior-superiorly to enlarge the airway space on the glossopharyngeal plane.

Key words: obstructive, Hyoid suspendsion, Sleep apnea, Glossopharyngeal plane, X-ray projection measuring