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- Title
Validation of a newly developed SPL Chirp for intracochlear ECochG measurement.
- Authors
Walkowiak, A.; Lorens, A.; Polak, M.; Skarzynski, P. H.
- Abstract
Introduction: Intracochlear electrocochleography (ECochG) records electrical potentials generated in the inner ear in response to acoustic stimuli. Previous studies have demonstrated that ECochG recordings are related to the remaining inner ear function. Recently intracochlear ECochG measurement tool was applied during CI surgery to gain a better understanding of the impact of the implant on the inner ear function. For the stimulation, a newly developed SPL chirp will be applied. Aim: The aims of this study were to validate SPL chirp and secondly, to perform real time intracochlear EcochG recordings during the electrode advancement and maneuvering during the cochlear implantation Material and methods: Ten patients implanted with the Flex electrodes, with various degree of hearing preservation were postoperatively tested for SPL chirps and tone bursts of 250, 500, 1000, 2000 and 4000 Hz. The recordings was performed for each active electrode in alternating mode. The frequency specific response amplitudes of tone bursts were compared with those of SPL chirpl and SPL chirp2. Results: In every subject we obtained response to tone bursts and SPL chirp responses. Generally, SPL chirp frequency specific amplitudes were equal or lower than those for tone bursts obtained at the same stimuli level. The frequency specific amplitudes varied from more than1µV (noise flor) to about 100uV. Conclusions: SPL chirps are useful stimuli to be used during the intraoperative monitoring of hearing preservation cochlear implant surgery as a time-reduction paradigm comparing to burst stimulation. Such stimuli may provide additional information of cochlea specific information related to hearing preservation.
- Subjects
POLAND; COCHLEA surgery; COCHLEAR implants; EVOKED response audiometry; CONFERENCES &; conventions; INTRAOPERATIVE monitoring; HEARING; ACOUSTIC stimulation; PERIOPERATIVE care
- Publication
Journal of Hearing Science, 2024, Vol 14, Issue 3, p119
- ISSN
2083-389X
- Publication type
Article