Akademik Veri Yönetim Sistemi
13th Balkan & 3rd Central and West Asian ORL&HNS Association Congress, İstanbul, Türkiye, 6 - 08 Haziran 2024, ss.146, (Özet Bildiri)
Background: The most frequently complained problem in cochlear implant users with inner ear malformations is disturbing non-auditory stimulation. Different programming techniques can be applied for this disorder. Although triphasic electrical stimulation, a new stimulation mode, is frequently used in patients with facial nerve stimulation, no previous studies have been conducted on its spectral-temporal resolution, discrimination in noise, and cortical effect in cochlear implant users with inner ear malformations. Therefore, our aim in our study was to evaluate the spectral-temporal resolution, auditory performance in noise and auditory cortical effect of triphasic electrical stimulation in people with inner ear malformations.
Methods: Our study included 20 cochlear implant users with normal inner ear anatomy and 20 cochlear implant users with inner ear malformations. Turkish Matrix Test (discrimination in noise), electrophysiological auditory cortical tests (p300), spectral resolution (SMRT) and temporal resolution (RGDT) evaluations were performed on the patients in the programs recorded with both biphasic electrical stimulation and triphasic electrical stimulation.
Results: In cochlear implant users with inner ear malformations, MCL and THR levels were obtained higher in the apex, medial and basal regions in triphasic electrical stimulation compared to biphasic stimulation (p<0.05). Similarly, SRT and SDS values were obtained significantly better in triphasic electrical stimulation than in biphasic stimulation in the group with inner ear malformation (p<0.05). Additionally, in cochlear implant users with inner ear malformations, significantly better results (p<0.05) were observed in SMRT, RGDT, Matrix test and p300 amplitude measurements in triphasic electrical stimulation compared to biphasic stimulation.