Cochlear implants

Cochlear implants

Last Reviewed : 12/25/2020
Cochlear  implants

A cochlear implant (CI) is a surgically implanted electronic device that provides a sense of sound to a person who is profoundly deaf or severely hard of hearing in both ears. Cochlear implants bypass the normal hearing process; they have a microphone and some electronics that reside outside the skin, generally behind the ear, which transmits a signal to an array of electrodes placed in the cochlea, which stimulate the cochlear nerve.

The procedure in which the device is implanted is usually done under general anesthesia. Risks of the procedures includemastoiditis, otitis media (acute or with effusion), shifting of the implanted device requiring a second procedure, damage to the facial nerve, damage to the chorda tympani, and wound infections. People may experience problems with dizziness and balance for up to a few months after the procedure; these problems generally resolve, but for people over 70, they tend not to.

Evidence is of low to moderate quality that when CIs are implanted in both ears at the same time, they improve hearing in noisy places for people with severe loss of hearing but other measures are mixed. Implanting the CIs sequentially instead of simultaneously makes things worse or causes no change. There is some evidence that implanting CIs to improve hearing, may also improve tinnitus but there is some risk that it may cause people who never had tinnitus to get it.

There is some controversy around the devices; much of the strongest objection to cochlear implants has come from the Deaf community, which consists largely of pre-lingually deaf people whose first language is a sign language. For some in the Deaf community, cochlear implants are an affront to their culture, which as they view it, is a minority threatened by the hearing majority.


We researched this topic for you and found the following best online resources. They are categorized into basic, advanced, and research level based on the extent of information you need. You will be taken to the respective websites by pressing on the links below.


Basic information: about hearing cochlear implant benefits & working national institute on deafness and other communication disorders cochlear implants amrican speech language hearing association cochlear implants kids what is a cochlear implant? cochlear implant us food and drug administration cochlear implant healthy hearing cochlear implant hearing what is a cochlear implant? hearing loss association of america cochlear implant university of maryland medical center cochlear implant baby cochlear implant american academy of otolaryngology – head and neck surgery cochlear implant cochlear implant ear cochlear implant new zealand audiological society cochlear implant cochlear implant very well cochlear implant surgery nhs uk treating hearing loss


Advanced information: medscape indications for cochlear implants advanced bionics cochlear implant dizziness and vertigo from cochlear implants (ci) history of cochlear implants use of vaccines to prevent meningitis in persons with cochlear implants national association for deaf nad position statement on cochlear implants (2000) deaf cochlear implant. mri cochlear implants

Nyu langone medical center / new york university school of medicine. "early evidence suggests hybrid cochlear implants may benefit millions with common form of hearing loss: multicenter study shows that device leads to major improvements in hearing, speech recognition." sciencedaily. Sciencedaily, 28 july 2015. . ear surgry information center cochlear implant patient cochlear implant health care cochlear implants radiopedia cochlear implant advantages & disadvantages: hearing aids vs. Cochlear implants for those with severe hearing loss by personal thoughts of ellen a. Rhoades are cochlear implant patients suffering from perceptual dissonance? By gerald e. Loeb, m.d. (ear & hearing 2005;26;435– 450 britannica cochlear implant



Bajwa ss, kulshrestha a. The cochlear implantation surgery: a review of anesthetic considerations and implications. Int j health allied sci [serial online] 2013 [cited 2016 may 26];2:225-9. Available from:

Tanamati lf, costa oa, bevilacqua mc. Long-term results by using cochlear implants on children: systematic review. Int. Arch. Otorhinolaryngol. 2011;15(3):365-375

Al sabellha rm, hager a. The value of torch screening in children with bilateral profound sensorineural hearing loss. Indian j otol [serial online] 2012 [cited 2016 may 26];18:62-4. Available from: j. Appl. Oral sci. Vol.19 no.6 bauru nov./dec. 2011 systematic review:instruments to assess the oral language of children fitted with a cochlear implant: a systematic review by mariane perin da silva et al., braz. J. Otorhinolaryngol. Vol.81 no.1 são paulo jan./feb. 2015 review articles:performance of hearing skills in children with auditory neuropathy spectrum disorder using cochlear implant: a systematic review by nayara freitas fernandes et al., review article front. Neuroeng., 15 october 2010 | neuroengineering tools/applications for bidirectional interfaces, brain–computer interfaces, and neuroprosthetic implants – a review of recent progress by ryan mark rothschild et al., review article front. Psychol., 14 may 2013 | training to improve language outcomes in cochlear implant recipients by erin m. Ingvalson et al., bittencourt ag, torre aagd, bento rf, tsuji rk, brito r. Prelingual deafness: benefits from cochlear implants versus conventional hearing aids. Int. Arch. Otorhinolaryngol. 2012;16(3):387-390 martins mbb, lima fvf, júnior rcs, santos acg, barreto vmp, jesus epf, et al. Cochlear implants: our experience and literature review. Int. Arch. Otorhinolaryngol. 2012;16(4):476-481 review article front. Syst. Neurosci., 26 november 2013 | functional and structural changes throughout the auditory system following congenital and early-onset deafness: implications for hearing restoration by blake e. Butler et al., review article front. Psychol., 26 september 2013 | sensitive and critical periods in visual sensory deprivation by patrice voss. pediatrics october 2005, volume 116 / issue 4 cochlear implantation in children younger than 12 months by susan b. Waltzman, j. Thomas roland, jr radiol bras vol.46 no.3 são paulo may/june 2013 review article cochlear implant: what the radiologist should know by natália delage gomes et al., quality of life among cochlear implant recipients


Other helpful resources(support groups): cochlear implant childrens support group


Related videos: how a cochlear implant works by advanced bionics cochlear implants: people hearing for the first time! cochlear implant surgery thomas jefferson cochlear implant: simulation on speech and music simulation of cochlear implants


Presentations/quiz/newspaper articles: deafness: not everyone wants to be 'fixed' cost of cochlear implant operation may go down to rs 1 lakh what cochlear implants did for my son cochlear implants done at madurai grh depression symptoms may improve with cochlear implants infants may benefit from advanced cochlear implants cochlear implants - an introduction r.ranjith audiologist madras ent research foundation chennai

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