The Effect of External Approach Septoplasty on Olfactory Function.

Objective: Septal deviation-induced nasal obstruction is frequently accompanied by hyposmia. The aim of this study was to evaluate the effect of external approach septoplasty on olfactory function. Methods: Thirty patients (23 males, 7 females) who had external approach septoplasty were included in the study. The age interval was 18 to 60 years (mean 33+/-12 years). All subjects had olfactory function and acoustic rhinometry tests in both the pre- and postoperative periods (mean interval 6 weeks +/- 3 weeks). Olfactory function was determined by the "Sniffin Sticks" test. The minimum cross-sectional area from the nostril to 2.20 cm backward was referred to as MCA1, and the minimum cross-sectional area from 2.20 to 5.40 cm was referred to as MCA2, determined by acoustic rhinometry. Results: Olfactory threshold, discrimination, and identification function improved significantly after external approach septoplasty. A statistically significant difference was also detected between pre- and postoperative left MCA1 and left MCA2 of the nasal cavities. Postoperative hyposmic and anosmic patient improvement was statistically significant. Conclusion: External approach septoplasty has a beneficial effect on olfaction and this effect may be partly due to interactions between the increased perception of nasal air flow, as well as surgery-associated improvement in the internal nasal valve area. (C) 2017 by Mutaz B. Habal, MD.

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