Comparisons of Auditory and Vestibular Functions After Septorhinoplasty Performed with the Micro-compass Saw...

To evaluate hearing and labyrinth functions following different osteotomy types (micro-compass saw, osteotome, and no osteotomy) performed in septorhinoplasty operations.

The study included 74 patients operated between January 2020 and March 2022, separated into 3 groups: Group 1: 24 patients (16 females and 8 males): osteotome was used for the osteotomy; Group 2: 24 patients (12 females and 12 males): micro-saw was used for osteotomy; and Group 3: 26 patients (17 females and 9 males): open technique septoplasty with no osteotomy. At 1 day before and 1 week after the operation, all the patients underwent audiological examination, tympanometry, vestibular evoked myogenic potentials (c-VEMP), video head impulse test (v-HIT), videonystagmography (VNG), and distortion product otoacoustic emission (DPOAE) tests.

In the c-VEMP tests, significant differences were determined between the groups in respect of N1, P1, and N1-P1 latencies and N1-P1 amplitudes before and after the operation. In the v-HIT test, the change in right-side posterior gain postoperatively was statistically significant in the micro-saw group (p<0.05). The postoperative right lateral canal values were determined to be statistically significantly increased in the micro-saw group compared to the osteotome group (p<0.05).

This is the only study in the literature to have determined vestibular effects with the evaluation of such a wide range of techniques. Previous studies in the literature have found no effect of osteotomy technique on the balance and hearing systems. The results of this study demonstrated that the preoperative and postoperative difference between the osteotomy techniques had an effect on the balance system. The change in the balance tests following an operation with classic osteotomy shows a greater predisposition to benign positional vertigo. In this sense, the micro-saw can be considered safer. Level of Evidence II This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .