Hearing Preservation After Cochlear Implantation May Improve Long-term Word Perception in the Electric-only Condition

Dalbert, Adrian; Huber, Alexander; Baumann, Naemi; Veraguth, Dorothe; Röösli, Christof; Pfiffner, Flurin

doi:10.1097/mao.0000000000001193

Cited by 28 publications

(22 citation statements)

References 31 publications

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“…In fact, the results for speech perception and sound localization tests appeared relatively better than those for other standard CI listeners (data not shown). Likewise, Dalbert et al demonstrated that CI recipients with preserved low frequency hearing had significantly better speech perception scores with electric stimulation alone at 18 months or more after surgery [17]. With regard to the amplification of residual low frequency hearing, we previously reported that acoustic amplification might contribute to improved hearing abilities using an EAS audio processor, even within a limited range of low frequencies [18].…”

Section: Discussionmentioning

confidence: 68%

Feasibility of hearing preservation for residual hearing with longer cochlear implant electrodes

Moteki

Nishio

Miyagawa

et al. 2018

Acta Oto-Laryngologica

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Background: Hearing preservation is thought to be achievable following atraumatic surgery with thin cochlear implant electrodes; therefore, the surgical approach and implant electrode design are crucial considerations. Objective: To assess the feasibility of hearing preservation with long electrodes for patients meeting the criteria for conventional cochlear implantation. Methods: One hundred and two patients (132 ears) who underwent cochlear implant surgery were analyzed. Inclusion criteria included measurable residual hearing in the low frequency before implantation and not meeting the criteria for electric acoustic stimulation (EAS). Results: Of the 18 patients with residual hearing in the low frequency enrolled, 17 subjects (94.4%) retained low frequency hearing. A younger age at surgery tended to contribute to better hearing preservation than that observed in older patients. There was no clear trend regarding the influence of insertion depth angle of the electrode on hearing preservation. Conclusion: It is possible to achieve hearing preservation in the lower frequency by the use of longer electrodes. This study underscores the importance of atraumatic surgery, even for patients with only limited residual hearing, and longer electrodes should be adopted for EAS. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 68%

Feasibility of hearing preservation for residual hearing with longer cochlear implant electrodes

Moteki

Nishio

Miyagawa

et al. 2018

Acta Oto-Laryngologica

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“…Single centre prospective studies allow for greater control over confounding variables, but the results are not always representative of what can be expected from a broader clinical sample in real-world practice. The results are encouraging at the 6-month point, and further improvement in some subjects can be expected over the course of the first year of implant use and beyond [5,35]. The results in noise were compromised by the highmissing data rates and the number of different tests used.…”

Section: Discussionmentioning

confidence: 90%

“…Improved surgical techniques and cochlear implant (CI) electrode designs minimise cochlear trauma and can allow preservation of residual hearing: When residual hearing is preserved patient outcomes tend to be better, regardless of whether that residual hearing is useable [4][5][6]. Nonetheless, a recent systematic review by Hoskison et al [7] shows that trauma to the cochlea does occur in 18% of implantations and in most cases occurs when the electrode array passes from the scala tympani to the scala vestibuli.…”

Section: Introductionmentioning

confidence: 99%

Outcomes for a clinically representative cohort of hearing-impaired adults using the Nucleus® CI532 cochlear implant

Hey¹,

Neben²,

Stöver

et al. 2020

Eur Arch Otorhinolaryngol

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Purpose Hearing performance data was collected from a large heterogeneous group of subjects implanted with the Coch-lear™ Nucleus® CI532 with Slim Modiolar Electrode, for the purposes of postmarket clinical follow-up. Data was analysed for factors which may predict postoperative speech recognition scores. Methods Data was collected retrospectively from five German clinics for 159 subjects from March 2017 to August 2018. Hearing thresholds and recognition scores for monosyllabic words in quiet and sentences in noise were measured preoperatively and at 3 and 6 months postoperatively. Results There was a mean gain of 44% points (95% CI 39-49%) at 6 months in monosyllable scores in quiet for implanted ears. Preoperative hearing thresholds in implant ears increased systematically with decreasing age; however, younger subjects had better baseline monosyllable scores with hearing aids compared with older subjects. Baseline performance alone explained 14% of the variation in postoperative scores. Residual hearing was preserved on average to within 22 dB at 250 Hz and 30 dB at 500 Hz of preoperative levels. Conclusions In a large and varied cohort of routinely treated hearing-impaired adults, speech recognition with the CI532 for German monosyllabic words in quiet at 6 months was equivalent to performance reported at one year or more in other published studies. Although younger subjects had poorer preoperative pure-tone thresholds, they had better preoperative word recognition scores compared with older subjects, and also had higher post implant scores. Further research is required to identify if this phenomenon is just applicable to German health system assessment and referral practices.

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“…Overall, our results support the notion that an electrical charge applied at levels used in the clinical routine does not have an acute deleterious effect on cochlear function. Preserving residual acoustic hearing is among the current frontiers in cochlear implant (CI) surgery and should be attempted in all CI recipients with residual hearing capacities (1,2). Preservation of residual hearing allows electric-acoustic stimulation (EAS) (3)(4)(5) in CI recipients with considerable residual hearing in the low frequencies and seems to lead to better speech understanding in the electric-only condition in conventional CI recipients (1,2).…”

Section: Discussionmentioning

confidence: 99%

Electrocochleographic Responses Before and After Short-Term Suprathreshold Electrical Stimulation in Human Cochlear Implant Recipients

Hoesli

Huber

Pfiffner

et al. 2018

Otology &Amp; Neurotology

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In a majority of cases, electrophysiological responses to acoustic stimuli remain unchanged in the earliest postoperative phase. However, deterioration of cochlear function occurs in this phase. Neural as well as hair cell components of the ECoG signal are affected. Such deterioration is not associated with unusually high electrical charge levels during CI telemetry. Overall, our results support the notion that an electrical charge applied at levels used in the clinical routine does not have an acute deleterious effect on cochlear function.

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Hearing Preservation After Cochlear Implantation May Improve Long-term Word Perception in the Electric-only Condition

Cited by 28 publications

References 31 publications

Feasibility of hearing preservation for residual hearing with longer cochlear implant electrodes

Feasibility of hearing preservation for residual hearing with longer cochlear implant electrodes

Outcomes for a clinically representative cohort of hearing-impaired adults using the Nucleus® CI532 cochlear implant

Electrocochleographic Responses Before and After Short-Term Suprathreshold Electrical Stimulation in Human Cochlear Implant Recipients

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