Modified stapes surgery for otosclerosis: An evaluation of auditory results and post-operative complications

Abstract

Background: The senior author Shiao, had introduced a modified version of the traditional stapes surgery, called minimally traumatic stapes surgery (MTSS), and explored its effectiveness in reducing postoperative vertigo. However, MTSS exhibited no significant breakthrough in terms of audiometric results. Building upon the original MTSS through slight modifications and the use of the Medtronic Big Easy® Piston as the prosthesis, this study evaluates a refined version of the original MTSS technique. In particular, this research sought to investigate the impact of this refined approach on hearing outcomes and postoperative complications among patients diagnosed with otosclerosis. Methods: This research comprehensively examined the medical records of individuals diagnosed with otosclerosis who underwent MTSS. The postoperative outcomes assessed encompassed hearing outcomes and the occurrence of any new complications. Results: Overall, 95 patients diagnosed with otosclerosis (comprising 106 affected ears) underwent MTSS. Significant improvements in both the average air conduction threshold (40 ± 16.82 dB after vs. 60 ± 14.56 dB before surgery; p < 0.0001) and average air–bone gap (11.99 ± 7.24 dB after vs. 29.65 ± 9.47 dB before surgery; p =0.003) were observed after the surgery. Conversely, no significant change in the average bone conduction threshold was observed after the procedure (28 ± 13.81 dB after vs. 29 ± 12.31 dB before surgery; p = 0.149). Among the 106 affected ears, 102 showed postoperative air–bone gap measurements <20 dB, indicating an impressive 96.2% overall hearing improvement. Notably, only a few postoperative complications were observed, including vertigo, chorda tympani injury, facial weakness, and a slight hearing deterioration. Conclusion: The refined MTSS technique promoted significant postoperative hearing improvements with minimal complications. This approach showed potential for addressing the surgical challenges in Asian patients with otosclerosis, emphasizing the importance of further research on this advanced procedural method.