Effect of Functional Endoscopic Sinus Surgery on the Voice Quality among Patients with Rhinosinus Polyposis

Introduction: Rhinosinus polyposis is associated with voice quality reduction. There has been little evidence about the efficacy of rhinosinus polyps surgery on patients' voice quality so far. The aim of the present study was to evaluate the nasality and acoustic voice changes after rhinosinus polyposis surgery.   Materials and Methods: The population in this study composed of 30 eligible patients with rhinosinusitis and rhinosinus polyposiss. The functional endoscopic sinus surgery (FESS) was the therapeutic intervention. Acoustic voice parameters were jitter (%), shimmer (db), noise to harmonic ratio (NHR), and fundamental frequency (F0) for the vowels [a, o, e, aa, ie, and ou]. For nasality evaluation, the articulation of vowel [a] was examined using nasometer device. The changes regarding the patients’ voice were evaluated one day before and one month after the surgery. Results: The mean age of the participants was 41.2±14.3 years. Considering gender distribution, 20 (66.7%) subjects were men. After the operation, the nasality increased significantly from 40.8% to 74.3% (P<0.001). In addition, the findings revealed the increase of shimmer and F0 (P>0.05). On the other hand, jitter and NHR changes were insignificant.   Conclusion: The findings of the current study showed that hyponasality decreased a month after the treatment of rhinosinus polyposis with FESS. However, the acoustic quality of voice had no significant changes after the surgery.