Abstract:Objective To study the applications of acoustic rhinometry and rhinomanometry in evaluation of postoperative nasal function in obstructive sleep apnea-hypopnea syndrome (OSAHS) patients with abnormal nasal structures treated by nasal cavity ventilation expansion techniques. Methods Thirty-six adult patients suffering from polysomnography (PSG)-confirmed OSAHS combined with nasal obstruction and abnormal nasal structures were selected as the study subjects. Endoscopic nasal cavity ventilation expansion techniques were performed individually in all the patients according to the results of the examination. Before surgery and 6 months after surgery, they all filled visual analogue scale (VAS) and took the examinations of acoustic rhinometry and rhinomanometry.Results Preoperative VAS score, total inspiratory resistance, total expiratory resistance, minimal cross-sectional area, nasal volume and the distance between the nostril and minimal cross-sectional area were(6.97±1.27),(2.07±1.07)kPa/L·S-1,(2.15±1.09)kPa/L·S-1,(0.39±0.16)cm2,(2.20±0.97)cm3 and (1.97±0.47) cm, respectively. At 6 months postoperatively, they were (1.33±0.92),(1.69±1.03)kPa/L·S-1,(1.90±1.02)kPa/L·S-1,(0.51±0.17)cm2,(2.73±1.05)cm3 and (2.19±0.46) cm. There were statistically significant differences in all indexes before and after surgery(P<0.05). Conclusions Endoscopic nasal cavity ventilation expansion techniques can significantly improve the subjective and objective nasal ventilation functions in OSAHS patients with abnormal nasal structures. Acoustic rhinometry and rhinomanometry may objectively evaluate the changes of nasal function in these patients managed with endoscopic nasal cavity ventilation expansion techniques.