ABSTRACT
Objective To compare the upper airway changes after H-uvulopalatopharyngoplasty (H-UPPP) combined with transpalatal advancement pharyngoplasty (PA) in patients with obstructive sleep apnea hypopnea syndrome (OSAHS).Methods Eighty-six patients with OSAHS were selected,39 patients were treated with H-UPPP alone (control group),and 47 patients were treated with H-UPPP combined with PA (observation group).The upper airway changes were measured by CT and apnea hypopnea index (AHI) change in the 2 groups were compared before and after operation.Results The surgery effective rate in observation group was 80.9％ (38/47),in control group was 56.4％ (22/39),there was statistical difference (P ＜ 0.05).The AHI depressed value before and after operation in observation group and control group were (40.5 ± 14.6) times/h and (16.7 ± 12.0) times/h respectively,the hard palate length depressed value were (5.5 ± 3.2) mm and (1.6 ± 0.2) mm respectively,the anteroposterior diameter incremental value of hard palate were (3.6 ± 2.3) mm and (-1.6 ± 3.4) mm respectively,the anteroposterior diameter incremental value of palate and pharynx were (1.6 ± 1.2) mm and (-1.2 ± 1.8) mm respectively,the above indexes in observation group were significantly better than those in control group,there were statistical differences (P ＜ 0.05).The minimum diameter incremental value of retropalatal airway in control group was (13.2 ± 3.1) mm,in observation group was (4.9 ± 1.6) mm,there was statistical difference (P ＜ 0.05).Conclusion H-UPPP combined with PA offers benefit over H-UPPP alone in patients with OSAHS,which may be achieved by increasing anteroposterior diameter of palate and pharynx.
ABSTRACT
Objective To investigate voicing changes of adult patients with obstructive sleep apnea hypopnea syndrome (OSAHS) before and after H-uvulopalatopharyngoplasty (H-UPPP). Methods 56 adult OSAHS pa-tients and 40 healthy people were included in the study. Acoustic parameters and formant frequencies were measured for each patient before and after H- UPPP, and also for the control group. Results Acoustic parameters: each group demonstrated no differences in all the parameters except for normalized noised energy (NNE). NNE increased after H-UPPP. Formant frequency: F1, B1, F2, B2, F3 of OSAHS patients were significantly lower than normal control. There was no significant difference in the formant frequency before operation and one week after; however, F1 and F2 were lower than the normal control one week after surgery. One month after surgery, F1 and F2 were ob-viously higher than that obtained in one week. All the other parameters compared with normal controls showed no significant discrepancies. Conclusion Acoustic characteristics of adult OSAHS patients were different from healthy person. After H-UPPP, the vocal tracts of patients changed, thus causing improvement to the acoustic parameters and voicing qualities, especially at the formant frequency. After the surgery, the formant frequencies of the patients increased gradually to the range of healthy people.