2014
DOI: 10.1097/mao.0000000000000375
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Electrically Evoked Auditory Brainstem Response–Based Evaluation of the Spatial Distribution of Auditory Neuronal Tissue in Common Cavity Deformities

Abstract: The results of EABR testing suggested that auditory neuronal elements are distributed to the anteroinferior part of CC deformity, mainly around or near the inner wall of the cavity. In cases with CC deformity, EABR testing is useful to achieve the optimal electrode array placement and to adjust programming parameters of the implanted device, which might be essential to maximize CI outcomes and to decrease facial nerve stimulation.

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Cited by 31 publications
(13 citation statements)
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“…It should be noted that identification of soft tissue at the core of the cystic cochlea does not necessarily indicate a need for use of a modiolar hugging electrode array because the precise distribution of neuronal elements is uncertain in this type of malformed cochleae. However, when the entire modiolus is absent, as for the left cochlea in our patient, the standard straight electrode array is recommended because neuronal tissue may be distributed near the inner wall of the cystic cochlea, as we previously showed in patients with a common cavity deformity [36].…”
Section: Discussionmentioning
confidence: 74%
“…It should be noted that identification of soft tissue at the core of the cystic cochlea does not necessarily indicate a need for use of a modiolar hugging electrode array because the precise distribution of neuronal elements is uncertain in this type of malformed cochleae. However, when the entire modiolus is absent, as for the left cochlea in our patient, the standard straight electrode array is recommended because neuronal tissue may be distributed near the inner wall of the cystic cochlea, as we previously showed in patients with a common cavity deformity [36].…”
Section: Discussionmentioning
confidence: 74%
“…This issue is supported by findings from Yamazaki et al, in which the electrically evoked auditory brainstem response as tested via the CI electrode suggested that the auditory neural elements are mainly distributed to the anteroinferior part of the single cavity, that is, the cochlear portion, 27 whereas in cases of CA only vestibular parts are histologically present 23 . Structured reports on hearing outcomes after cochlear implantation in CC cases are rare, and varying results are reported.…”
Section: Discussionmentioning
confidence: 78%
“…We have performed ABRs in all our cases before implantation but had positive responses in only one case. Some scholars suggest that intra-operative electrically evoked ABR (EABR) can be used to detect evoked waves stimulated by biphasic electrical stimuli with various stimulus pulse intensities ( Yamazaki et al., 2014 , Minami et al., 2015 ). Only one patient with CCD had residual hearing by ABR in our study, although meaningful evoked waves could be detected in all patients by intra-operative telemetry.…”
Section: Discussionmentioning
confidence: 99%