Cochlear Implants (CI)

Cochlear Implants (CI)

Cochlear Implants and Vestibular Anomalies

Cushing et al (2013) reported on 153 children with profound sensorinerual hearing loss (SNHL), 119 of whom had unilateral cochlear implants (CI) at the time of testing. Cushing and colleagues reported vestibular end-organ dysfunction was present in half of the subjects, and of note, none of the children reported signs or symptoms of vestibular injury after receiving their CI.

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Children with Congenital Deafness, Cochlear Implants (CIs), and Auditory Learning

Mishra, Boddupally, and Rayapati (2015) evaluated 27 children with congenital deafness who received cochlear implants to examine and characterize training-induced changes in speech-in-noise (SIN) perception. Thirteen children and 5 adults with normal hearing were also evaluated. Of note, 13 children with cochlear implants were trained (40 hours of training over 5 weeks) and 14 children with CIs were not trained.

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Characteristics of Children Less Likely to Achieve Open Set WRS Through Cochlear Implants

In general, cochlear implantation is phenomenally successful. That is, when children are identified and implanted early (preferably ages 6 to 12 months), the outcomes of cochlear implantation are typically good to excellent. Geers et al (2008) reported that “the best (CI) outcomes correlated with lower pure-tone averages obtained with their cochlear implant, younger age at implantation and higher nonverbal IQ.

 

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Cochlear Implants, Normal Hearing, and Single-Sided Deafness

Many reports in the literature have demonstrated that cochlear implants are a reasonable, successful, and viable option for people with severe-to-profound unilateral hearing loss (Arndt et al 2011; Baguley, 2010; Buechner et al 2010; Popelka et al 2010; Van Zon et al 2015; Van De Heyning et al 2008).


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When to Recommend Cochlear Implants vs Hearing Aids?

Lovett, Vickers, and Summerfield addressed the delineation point at which a child is four times more likely to excel with cochlear implants (CIs) as compared to hearing aids. Of note, CI outcomes for an individual cannot be predicted ahead of time as the variation in outcomes (among individuals) is huge (Davidson, 2011). Nonetheless, we can make statistical predictions for the population.

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Pediatric Cochlear Implant Failures and Vestibular Anomalies

Beck et al (2015) reported vestibular and balance disorders are highly associated with SNHL in children, however, most professionals don’t screen for vestibular dysfunction in (these same) children. The authors estimated the prevalence of vestibular and balance disorders in children may be as high as 15 percent of all children, and up to 70 percent children with SNHL.  

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CROS and BiCROS Hearing Aids

Contralateral routing of signal (CROS) amplification systems are intended to be used when (essentially) one ear is normal or has a mild/moderate hearing loss (i.e., is generally a candidate for amplification) and the other ear is (more-or-less) not “aidable.” CROS hearing aids might be recommended for single-sided deafness (SSD) or for people with very poor unilateral word recognition scores.

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Cochlear Implants, Brain Reorganization, and Hearing Loss: Interview with Anu Sharma, PhD

Douglas L. Beck, AuD, spoke with Dr. Sharma about cochlear implants, brain reorganization after hearing loss, and early stage hearing loss (mild hearing loss) correlating with brain changes.

Academy: Good morning, Anu. Always great to chat with you!

Sharma: Hi, Doug. Nice to speak with you, too.

Academy: Anu, if I recall, you earned your doctorate from Northwestern University?

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Wireless Mics Improve Word Recognition for Hearing Aids and Cochlear Implants

Beck and Holmberg (2011) reported that there are significant benefits to wireless microphones (WM), such as (1) reduction of background noise, (2) reduction of reverberation, and (3) maintenance of the signal-to-noise ratio (SNR) as measured at the sound source (i.e., the person talking).

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Cochlear Implants and Music Perception: 2015

Wang, Zhou, and Xu (2011) evaluated 19 adult cochlear implant (CI) uses with regard to pitch perception. They reported that normal hearing listeners could identify changes in pitch of 0.4 semitones (the difference in two neighboring keys on a piano is one semitone). However, on average, people with CIs required 5.5 semitones (i.e., 5.5 keys white keys on a piano) to notice a change in pitch. Of note, the range of performance for the CI group was from 0.8 semitones to 19.6 semitones.  

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