Tolgahan ÇATLI, Taşkın TOKAT, Ergül BAŞARAN BOZKURT, Zehra Hilal ADIBELLİ, Uğurtan ERGÜN, Enver ALTAŞ, Levent OLGUN

Surgical considerations and audiological results of cochlear implantation in patients with otosclerosis

Background/aim: To emphasize the role of cochlear implantation CI in the auditory rehabilitation of patients with otosclerosis OS and share our surgical experiences on this rare group of patients. Materials and methods: Retrospective analysis of the patients who have a diagnosis of otosclerosis and implanted between January 1998-May 2019 was performed. Preoperative and postoperative clinical, radiological, audiological and surgical findings are presented. Results: Among 2195 patients who have been implanted in our institution, 12 0.54% met the diagnostic criteria of OS according to their preoperative clinical, radiological, audiological and peroperative surgical findings. Electrode insertion was performed via "round window membrane and cochleostomy"in 8 and 4 patients, respectively. No major complications occured. All patients showed satisfactory performances by means of audiometric scores postoperatively. Nonauditory stimulation NAS which manifested as "facial twitching"was a challenging problem in one patient during the surgery and subsided after the operation. Conclusion: Our experience on CI in patients with OS revealed that the implantation was a relatively safe procedure and had satisfactory impact on audiological performances.

Keywords:

Otosclerosis, cochlear implantation, cochlear ossification, facial twitching,

___

1. Faranesh N, Magamseh E, Zaaroura S, Zeidan R, Shupak A. Hearing and otoacoustic emission outcome of stapedotomy: does the prosthesis diameter matter? Journal of International Advanced Otology 2017; 13: 162-170.
2. Yetiser S. Bilateral vestibulopathy due to severe cochlear otosclerosis: a well-known condition without any favorable solution. Turkish Archives of Otorhinolaryngology 2018; 56 (3): 174-176.
3. West N, Brand M, Foghsgaard S, Cayé-Thomasen P. Surgical results and complications of cochlear implantation in faradvanced otosclerosis. Journal of International Advanced Otology 2017; 13: 304-307.
4. Laske RD, Röösli C, Chatzimichalis MV, Sim JH, Huber AM. The influence of prosthesis diameter in stapes surgery: a metaanalysis and systematic review of the literature. Otology and Neurotology 2011; 32: 520-528.
5. Semaan MT, Gehani NC, Tummala N, Coughlan C, Fares SA et al. Cochlear implantation outcomes in patients with far advanced otosclerosis. American Journal of Otolaryngology 2012; 33: 608-614.
6. Bayrak F, Çatlı T, Atsal G, Tokat T, Olgun L. Waardenburg syndrome: an unusual indication of cochlear implantation experienced in 11 Patients. Journal of International Advanced Otology 2017; 13: 230-232.
7. Sainz M, Garcia-Valdecasas J, Ballesteros JM. Complications and pitfalls of cochlear implantation in otosclerosis: a 6-year follow-up cohort study. Otology and Neurotology 2009; 30: 1044-1048.
8. Rotteveel LJ, Snik AF, Cooper H, Mawman DJ, Van Olphen AF et al. Speech perception after cochlear implantation in 53 patients with otosclerosis: multicentre results. Audiology and Neurootology 2010; 15: 128-136.
9. Ruckenstein MJ, Rafter KO, Montes M, Bigelow DC. Management of far advanced otosclerosis in the era of cochlear implantation. Otology and Neurotology 2001; 22: 471-474.
10. Kwok OT, Nadol JBJ. Correlation of otosclerotic foci and degenerative changes in the organ of Corti and spiral ganglion. American Journal of Otolaryngology 1989; 10: 1-12.
11. Swartz JD, Mandell DW, Wolfson RJ, Marlowe FI, Popky GL et al. Fenestral and cochlear otosclerosis: computed tomographic evaluation. American Journal of Otology 1985; 6: 476-481.
12. Fayad J, Moloy P, Linthicum FH Jr. Cochlear otosclerosis: does bone formation affect cochlear implant surgery? American Journal of Otology 1990; 11: 196-200.
13. Purohit B, Hermans R, Op de Beeck K. Imaging in otosclerosis: a pictorial review. Insights Imaging 2014; 5 (2): 245-252.
14. Shea JJ III, Domico EH. Facial nerve stimulation after successful multichannel cochlear implantation. American Journal of Otology 1994; 15: 752-756.