Risk Factors for Loss of Ipsilateral Residual Hearing After Hybrid Cochlear Implantation

Kopelovich, Jonathan C.; Reiss, Lina A. J.; Oleson, Jacob; Lundt, Emily S.; Gantz, Bruce J.; Hansen, Marlan R.

doi:10.1097/mao.0000000000000389

Cited by 52 publications

(46 citation statements)

References 12 publications

(15 reference statements)

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“…Age at implantation and duration of high frequency hearing loss have a negative effect on performance. In addition, a history of noise exposure and male gender also has a negative impact on performance with the implant 31 . When this research was initiated, some of these demographic features were important in standard cochlear implant patient counseling, however, it was not appreciated that similar factors would impact the Hybrid implant subjects as they had residual hearing 32 .…”

Section: Discussionmentioning

confidence: 99%

Multicenter clinical trial of the Nucleus Hybrid S8 cochlear implant: Final outcomes

et al. 2016

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Objective The concept expanding electrical speech processing to those with more residual acoustic hearing with a less invasive shorter cochlear implant has been ongoing since 1999. A multi-center study of the Nucleus Hybrid S8 CI took place between 2002–11. This report describes the final outcomes of this clinical trial. Study Design Multi-Center longitudinal single subject design Methods Eighty-seven subjects received a Nucleus® Hybrid™ S8 implant in their poorer ear. Speech perception in quiet (CNC words) and in noise (BKB-SIN) was collected pre- and post-operatively at 3, 6, and 12 months. Subjective questionnaire data using the APHAB was also collected. Results Some level of hearing preservation was accomplished in 98% subjects with 90% maintaining a functional low-frequency pure-tone average (LFPTA) at initial activation. By 12 months, 5 subjects had total hearing loss and 80% of subjects maintained functional hearing. CNC words demonstrated that 82.5% and 87.5% of subjects had significant improvements in the Hybrid and Combined conditions. The majority of had improvements with BKB-SIN. Results also indicated that as long as subjects maintained at least a severe LFPTA, there was significant improvement in speech understanding. Furthermore, all subjects reported positive improvements in hearing in three of the 4 subscales of the APHAB. Conclusion The concept of hybrid speech processing has significant advantages for subjects with residual low-frequency hearing. In this study, the Nucleus® Hybrid™ S8 provided improved word understanding in quiet and noise. Additionally, there appears to be stability of the residual hearing after initial activation of the device. Level of evidence 2c

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Section: Discussionmentioning

confidence: 99%

Multicenter clinical trial of the Nucleus Hybrid S8 cochlear implant: Final outcomes

et al. 2016

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“…If we extrapolate from the FDA S8 trial and accept the prevalence of late acceleration of hearing loss in hearing preservation implantees as 20%, we can estimate the relative risk of late hearing loss as roughly three times higher in those exposed to high charge relative to those who are not exposed. This univariate analysis may be confounded by additional variables, such as implant type, materials or patient health status – which our dataset does not address 17 . Finally, intracochlear pathologies (e.g.…”

Section: Discussionmentioning

confidence: 99%

Hearing Loss After Activation of Hearing Preservation Cochlear Implants Might Be Related to Afferent Cochlear Innervation Injury

Kopelovich¹,

Reiss²,

Etler³

et al. 2015

Otology &Amp; Neurotology

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“…This phenomenon, referred to as bimodal benefit or electricacoustic stimulation (EAS) benefit, has received considerable attention in recent years as a possible alternative to traditional cochlear implantation. Bimodal hearing is most often configured with a cochlear implant in one ear and a hearing aid on the opposite ear; however, recent improvements in surgical techniques also allow for the use of residual hearing in the implanted ear in some patients (e.g., Lenarz et al, 2013;Kopelovich et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Effects of contextual cues on speech recognition in simulated electric-acoustic stimulation

Kong

Donaldson

Somarowthu

2015

The Journal of the Acoustical Society of America

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Low-frequency acoustic cues have shown to improve speech perception in cochlear-implant listeners. However, the mechanisms underlying this benefit are still not well understood. This study investigated the extent to which low-frequency cues can facilitate listeners' use of linguistic knowledge in simulated electric-acoustic stimulation (EAS). Experiment 1 examined differences in the magnitude of EAS benefit at the phoneme, word, and sentence levels. Speech materials were processed via noise-channel vocoding and lowpass (LP) filtering. The amount of spectral degradation in the vocoder speech was varied by applying different numbers of vocoder channels. Normal-hearing listeners were tested on vocoder-alone, LP-alone, and vocoder þ LP conditions. Experiment 2 further examined factors that underlie the context effect on EAS benefit at the sentence level by limiting the low-frequency cues to temporal envelope and periodicity (AM þ FM). Results showed that EAS benefit was greater for higher-context than for lower-context speech materials even when the LP ear received only low-frequency AM þ FM cues. Possible explanations for the greater EAS benefit observed with higher-context materials may lie in the interplay between perceptual and expectation-driven processes for EAS speech recognition, and/or the band-importance functions for different types of speech materials.

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Risk Factors for Loss of Ipsilateral Residual Hearing After Hybrid Cochlear Implantation

Cited by 52 publications

References 12 publications

Multicenter clinical trial of the Nucleus Hybrid S8 cochlear implant: Final outcomes

Multicenter clinical trial of the Nucleus Hybrid S8 cochlear implant: Final outcomes

Hearing Loss After Activation of Hearing Preservation Cochlear Implants Might Be Related to Afferent Cochlear Innervation Injury

Effects of contextual cues on speech recognition in simulated electric-acoustic stimulation

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