Contribution of Nonimplanted Ear to Pitch Perception for Prelingually Deafened Cochlear Implant Recipients

Chen, Joshua Kuang Chao; Chuang, Ann Yi Chiun; McMahon, Catherine M.; Tung, Tao Hsin; Li, Lieber Po Hung

doi:10.1097/mao.0000000000000407

Cited by 11 publications

(9 citation statements)

References 16 publications

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“…Cochlear implantation is an important surgical technique for patients with severe to profound sensorineural hearing loss, and even in patients with inner ear malformation [ 1 , 2 ]. Hearing/speech performance and music perception can be improved after surgery [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Evolution of impedance field telemetry after one day of activation in cochlear implant recipients

Chen

Tsai

et al. 2017

PLoS ONE

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ObjectivesChanges in impedance between 24 hours and one month after cochlear implantation have never been explored due to the inability to switch on within one day. This study examined the effect of early activation (within 24 hours) on the evolution of electrode impedance with the aim of providing information on the tissue-to-electrode interface when electrical stimulation was commenced one day post implantation.MethodsWe performed a retrospective review at a single institution. Patients who received a Nucleus 24RECA implant system (Cochlear, Sydney, Australia) and underwent initial switch-on within 24 hours postoperatively were included. Impedance measurements were obtained intraoperatively and postoperatively at 1 day, 1 week, 4 weeks, and 8 weeks.ResultsA significant drop in impedance was noted 1 day after an initial activation within 24 hours followed by a significant rise in impedance in all channels until 1 week, after which the impedance behaved differently in different segments. Basal and mid-portion electrodes revealed a slight increase while apical electrodes showed a slight decrease in impedance from 1 week to 8 weeks postoperatively. Impedance was relatively stable 4 weeks after surgery.ConclusionsThis is the first study to report the evolution of impedance in all channels between initial mapping 1 day and 1 month after cochlear implantation. The underlying mechanism for the differences in behavior between different segments of the electrode may be associated with the combined effect of dynamics among the interplay of cell cover formation, electrical stimulation, and fibrotic reaction.

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Section: Introductionmentioning

confidence: 99%

Evolution of impedance field telemetry after one day of activation in cochlear implant recipients

Chen

Tsai

et al. 2017

PLoS ONE

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“…Bimodal MCI performance was significantly better than CI-only performance, in agreement with previous studies that showed a bimodal advantage for music perception [ 5 , 10 , 11 , 13 , 19 , 46 , 47 ]. Previous studies have shown that adding low-frequency acoustic hearing in the contralateral ear can improve CI users' pitch perception ([ 46 , 48 , 49 ]). Chen et al [ 48 ] also found a significant correlation between HA experience and bimodal pitch perception in pediatric CI users, suggesting that HA experience before and/or implantation may help to develop pitch pattern perception.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have shown that adding low-frequency acoustic hearing in the contralateral ear can improve CI users' pitch perception ([ 46 , 48 , 49 ]). Chen et al [ 48 ] also found a significant correlation between HA experience and bimodal pitch perception in pediatric CI users, suggesting that HA experience before and/or implantation may help to develop pitch pattern perception. However, other studies have not shown significant bimodal advantages for music perception.…”

Section: Discussionmentioning

confidence: 99%

The Benefits of Residual Hair Cell Function for Speech and Music Perception in Pediatric Bimodal Cochlear Implant Listeners

et al. 2018

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Objective The aim of this study was to investigate the benefits of residual hair cell function for speech and music perception in bimodal pediatric Mandarin-speaking cochlear implant (CI) listeners. Design Speech and music performance was measured in 35 Mandarin-speaking pediatric CI users for unilateral (CI-only) and bimodal listening. Mandarin speech perception was measured for vowels, consonants, lexical tones, and sentences in quiet. Music perception was measured for melodic contour identification (MCI). Results Combined electric and acoustic hearing significantly improved MCI and Mandarin tone recognition performance, relative to CI-only performance. For MCI, performance was significantly better with bimodal listening for all semitone spacing conditions (p < 0.05 in all cases). For tone recognition, bimodal performance was significantly better only for tone 2 (rising; p < 0.05). There were no significant differences between CI-only and CI + HA for vowel, consonant, or sentence recognition. Conclusions The results suggest that combined electric and acoustic hearing can significantly improve perception of music and Mandarin tones in pediatric Mandarin-speaking CI patients. Music and lexical tone perception depends strongly on pitch perception, and the contralateral acoustic hearing coming from residual hair cell function provided pitch cues that are generally not well preserved in electric hearing.

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“…For nearly five decades, CI has been the treatment of choice for patients with severe-to-profound hearing loss. [7][8][9] Although lately, the effects of CI on tinnitus in users have gained attention among both researchers and clinicians. 10,11 Although variable, the degree of tinnitus suppression can, in some patients, be remarkable.…”

Section: Introductionmentioning

confidence: 99%

Early effects of very early cochlear implant activation on tinnitus

Chau

Li²,

Shiao

et al. 2023

Journal of the Chinese Medical Association

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Background: Cochlear implantation (CI) has long been the standard of care for patients with severe-to-profound hearing impairment. Yet the benefits of CI extend far beyond speech understanding, with mounting recent literature supporting its role in tinnitus abatement. However, those studies have uniformly analyzed the effects of tinnitus after the traditional 3-4 week waiting period between CI surgery and device activation. As many clinics are shifting these waiting intervals to become shorter (in some cases within 24 hours, little is known about tinnitus abatement very early in the post-operative period. The aim of this study is to compare pre- and post-operative tinnitus handicap in this unique but growing population of very early activated patients. Methods: Twenty-seven adults with severe-to-profound hearing impairment with chronic tinnitus (> 6 months) were included. Patients with concomitant psychiatric disorders were excluded. All patients were implanted with the same array and were switched on within 24 hours after the surgery. Tinnitus Handicap Inventory (THI) was recorded pre-operatively, immediately after activation at 24 hours post-operatively, at 1 week, 2 weeks, and I month after activation. Wilcoxon signed-rank test was used to compare values between pre-operative assessment and respective fitting sessions. Results: Mean THI 24 hours after implantation increased in comparison to that assessed pre-operatively (77.6 vs. 72.5, p = .001). By one week after surgery, the THI had decreased to 54.9 (p<0.001). This trend continued and was statistically significant at 2 weeks (36.0, p < .001) and 1 month (28.5, p < .001). Conclusion: On average, most patients with tinnitus will note a significant improvement in their tinnitus handicap when activated within 24 hours of cochlear implantation. However, tinnitus does increase between surgery and 24 hours, most likely reflecting not only intracochlear changes, but modulation of the entire auditory pathway. Following this early rise, the tinnitus continues to abate over the following month. Patients with tinnitus may benefit from early activation, though should be counseled that they may experience an exacerbation during the very early post-operative period.

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Contribution of Nonimplanted Ear to Pitch Perception for Prelingually Deafened Cochlear Implant Recipients

Cited by 11 publications

References 16 publications

Evolution of impedance field telemetry after one day of activation in cochlear implant recipients

Evolution of impedance field telemetry after one day of activation in cochlear implant recipients

The Benefits of Residual Hair Cell Function for Speech and Music Perception in Pediatric Bimodal Cochlear Implant Listeners

Early effects of very early cochlear implant activation on tinnitus

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