Long‐term audiologic outcomes and potential outcome predictors of cochlear implantation in cochlear aplasia with dilated vestibule: A case series

Kim, Bong Jik; Jeon, Hyoungwon; Kim, Yehree; Lee, Sang-yeon; Han, Jin Hee; Yi, Nayoung; Chung, Jong Woo; Oh, Seung Ha; Choi, Byung Yoon

doi:10.1111/coa.13952

Cited by 2 publications

(2 citation statements)

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“…The child demonstrated favorable audiological and speech progressions, achieving a 200-word vocabulary and the capacity to form two-word sentences at the one-year follow-up [51]. Previous research has indicated that CI surgery yields audiological and speech advantages for individuals with cochlear aplasia; however, these benefits are noted to be less favorable compared to CI surgery outcomes in individuals with normal inner ears [51,52]. Despite challenges in subgrouping cystic cavities in inner ear malformation cases, the report emphasizes that such complexities should not deter the consideration of CI surgery, especially when there is an acceptable anatomical appearance, the presence of the cochleovestibular nerve, and the use of an appropriate electrode [51].…”

Section: Inner Ear Malformations (Iem)mentioning

confidence: 95%

The Chronological Evolution of Cochlear Implant Contraindications: A Comprehensive Review

Hamed,

Alajmi,

Alkoblan

et al. 2024

JCM

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Cochlear implantation has emerged as a transformative intervention in addressing profound hearing loss, offering a paradigm shift in auditory rehabilitation for individuals with restricted auditory function. Throughout its history, the understanding of contraindications for cochlear implant (CI) surgery has evolved significantly. This review comprehensively analyzes the chronological advancements in the understanding of CI contraindications, examining studies conducted from historical timelines to the present. Recent research has revealed significant developments in the field, prompting a reevaluation of established criteria and resulting in expanded indications for CI. The chronological evolution of contraindications underscores the transformative nature of the field, offering potential improvements in outcomes and enhancing the quality of life for individuals with profound hearing loss. In conclusion, this narrative review emphasizes the dynamic nature of the field, where the reevaluation of contraindications has created new opportunities and broader indications for CI. The emerging prospects, including improved outcomes and enhanced quality of life, hold promise for individuals with profound hearing loss.

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Section: Inner Ear Malformations (Iem)mentioning

confidence: 95%

The Chronological Evolution of Cochlear Implant Contraindications: A Comprehensive Review

Hamed,

Alajmi,

Alkoblan

et al. 2024

JCM

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“…Cavity-type malformation (Figures 1P-R) characterized by a lack of central modiolus trunk requires the placement of an electrode with an appropriate length in a loopy format covering the circumference of the cavity where neuronal elements are distributed along the outer wall (34). In cochlear aplasia (Figure 1S), although placing an electrode in the vestibular portion is contraindicated as per the expert's opinion (31), CI was still attempted with some success as per the report of Kim et al (35).…”

Section: Morphological Variations In Inner Ear and Electrode Choicesmentioning

confidence: 99%

Cochlear implant electrode design for safe and effective treatment

Dhanasingh,

Nielsen,

Beal

et al. 2024

Front. Neurol.

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The optimal placement of a cochlear implant (CI) electrode inside the scala tympani compartment to create an effective electrode–neural interface is the base for a successful CI treatment. The characteristics of an effective electrode design include (a) electrode matching every possible variation in the inner ear size, shape, and anatomy, (b) electrically covering most of the neuronal elements, and (c) preserving intra-cochlear structures, even in non-hearing preservation surgeries. Flexible electrode arrays of various lengths are required to reach an angular insertion depth of 680° to which neuronal cell bodies are angularly distributed and to minimize the rate of electrode scalar deviation. At the time of writing this article, the current scientific evidence indicates that straight lateral wall electrode outperforms perimodiolar electrode by preventing electrode tip fold-over and scalar deviation. Most of the available literature on electrode insertion depth and hearing outcomes supports the practice of physically placing an electrode to cover both the basal and middle turns of the cochlea. This is only achievable with longer straight lateral wall electrodes as single-sized and pre-shaped perimodiolar electrodes have limitations in reaching beyond the basal turn of the cochlea and in offering consistent modiolar hugging placement in every cochlea. For malformed inner ear anatomies that lack a central modiolar trunk, the perimodiolar electrode is not an effective electrode choice. Most of the literature has failed to demonstrate superiority in hearing outcomes when comparing perimodiolar electrodes with straight lateral wall electrodes from single CI manufacturers. In summary, flexible and straight lateral wall electrode type is reported to be gentle to intra-cochlear structures and has the potential to electrically stimulate most of the neuronal elements, which are necessary in bringing full benefit of the CI device to recipients.

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Long‐term audiologic outcomes and potential outcome predictors of cochlear implantation in cochlear aplasia with dilated vestibule: A case series

Cited by 2 publications

References 9 publications

The Chronological Evolution of Cochlear Implant Contraindications: A Comprehensive Review

The Chronological Evolution of Cochlear Implant Contraindications: A Comprehensive Review

Cochlear implant electrode design for safe and effective treatment

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