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Bilateral Cochlear Implants

Bilateral Cochlear Implantation - Selected Bibliography of Peer-Reviewed Publications 

October 2006

Here's a great resource for people looking for the latest research on bilateral cochlear implants. It's a table summarizing the test population and results of about twenty peer-reviewed studies of bilateral cochlear implants.  Here it is!  

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Bilateral Cochlear Implants go Mainstream

November 2006

Many cochlear implant recipients are happy with hearing from just one ear, but even good-hearing cochlear implant recipients commonly have difficulty hearing in noise. Even in mildly noisy situations, a single cochlear implant does not seem loud or clear enough, in part because two ears are needed to provide direction of sound, focus on a speaker, and suppress extraneous sounds. A growing body of research now shows that many of these deaf individuals benefit from bilateral (two ear) hearing restoration with cochlear implants. Fascinating is that the same physiological tools normal hearing folks use to hear better in noise with two ears (binaural hearing) also help bilateral cochlear implant individuals.  Full Story

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Medicaid Appeal Wins Bilateral Implant Case

January 2007 

An Ardmore family won their appeal on a decision made by medicaid that denied their deaf child a second cochlear implant. At a hearing Tuesday in Oklahoma City, the Johnson's met with a state attorney, who told them that the state had decided to reverse it's decision. KTEN's Andrea Kurys has the story. The Johnson's say this was a landmark case that will pave the way for other deaf children who need bilateral implants. Their son Jacob was born deaf. Medicaid paid for a cochlear implant to be installed in his right ear, but denied them the second implant.    Full Story

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Bilateral Cochlear Implants go Mainstream

January 2007

Many cochlear implant recipients are happy with hearing from just one ear, but even good-hearing cochlear implant recipients commonly have difficulty hearing in noise. Even in mildly noisy situations, a single cochlear implant does not seem loud or clear enough, in part because two ears are needed to provide direction of sound, focus on a speaker, and suppress extraneous sounds. A growing body of research now shows that many of these deaf individuals benefit from bilateral (two ear) hearing restoration with cochlear implants. Fascinating is that the same physiological tools normal hearing folks use to hear better in noise with two ears (binaural hearing) also help bilateral cochlear implant individuals.   Full Story

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Two CIs are Better than One for Kids

June 2007

Campbell feels passionately enough about the importance of having two implants that she took Jared from their home in Massachusetts to Madison to participate in a research project at the university. There, Prof. Ruth Litovsky and others on her audiology research team are trying to understand what difference bilateral implants will make for whom and at what age.   "We are finding that when they go from one to two implants there is significant improvement," Litovsky said. "But how much better does it have to be to justify two implants? That debate is ongoing."   Increasingly the case is being made that two implants can be justified, especially for kids whose brains are still malleable enough to adapt to the electrical signals they get from the tiny little wire threaded into their ears.   Full Story

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'Sicko' Address Question of Bilateral CIs

June 2007

The movie shows parents who were shocked that CIGNA initially approved coverage for only one cochlear implant instead of two for their deaf daughter. The toddler's father says in the film that CIGNA apparently felt it was 'experimental to hear in two ears.' The father calls CIGNA to say Moore has taken an interest in the case and asks, 'Has your CEO ever been in a film before?' The film shows CIGNA's Philadelphia headquarters and replays a taped phone call from a company representative, cheerfully reporting the denial was reversed and two implants would be covered.  Full Story

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Canada Not Yet On Board with Bilateral CIs

June 2007

A couple forced to pay CHEO $30,000 for a procedure to restore their daughter's hearing is lobbying to change the way the government funds expensive medical treatments. As much as she tries, Josee Mondoux can't understand how, in Ontario, a child could be left deaf in one ear simply because the government -- which will spend $37 billion on health care this year -- wants to save $30,000. Ms. Mondoux says there is no excuse for what is happening to many deaf children in Ontario. She says the children, including about 20 in Ottawa and, until recently, her five-year-old daughter, Sydney, are being denied vital cochlear implants because the government is not convinced that spending the money is justified. "If you have problems with your eyes, they don't say we'll give you one glass for one eye," she said. "I don't understand why they are prepared to let children go deaf in one ear for the rest of their lives."  Full Story

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Determining if Two Cochlear Implants are Necessary

September 2008

The human auditory system possesses an amazing ability to accept and integrate sensory information from two ears. The ability to understand sound using two ears allows listeners to hear more effectively in noisy environments and to determine the directionality of sound. In this paper, we will discuss the binaural processing cues that our auditory system uses to recognize sounds and to separate them into different sound sources. We will also talk about ways to determine if two cochlear implants are necessary for optimal speech perception and localization performance or if one cochlear implant or one cochlear implant and one hearing aid on the opposite ear is sufficient.  Full Story

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Bilateral Cochlear Implants

February 2011

Today I'll talk about bilateral cochlear implantation and the benefits of having two implants in terms of speech perception in quiet and in noise, localization ability and implications on language development in children. I'll review the auditory perceptual disadvantages caused by unilateral hearing loss, and the advantages of bilateral hearing, which is the rationale for bilateral cochlear implantation. I'll also contrast simultaneous and sequential implantation, talk about pros and cons of each, and review some published literature. My associate, Dr. Kathleen Highhouse, will review clinical case studies of three adults who use bilateral cochlear implants (CI), two of whom were implanted simultaneously.  Full Story