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Transcript
Cochlear Implants • What is a cochlear implant? • How do they work? • Candidacy • Cochlear implants and the Deaf Community Aural Rehabilitation Cochlear Implants 1 How Cochlear Implants Work • Overview • Styles of Cochlear Implants • How the CI processes speech Aural Rehabilitation Cochlear Implants 2 Overview Aural Rehabilitation Cochlear Implants 3 Styles • External Speech Processor Aural Rehabilitation Cochlear Implants 4 Styles (continued) • Ear Level Speech Processor Aural Rehabilitation Cochlear Implants 5 How the CI processes speech • Sound is picked up by ear level microphone. • Sound is delivered to processor (either ear level of external). • Speech is processed in similar manner to that of a digital hearing aid. Aural Rehabilitation Cochlear Implants 6 How the CI processes speech (continued) • Processor is programmed by computer • Signal is sent back to a magnetic transmitter. • Signal is sent via FM signal to subcutaneous receiver. • Delivered to multichannel electrode in cochlea. Aural Rehabilitation Cochlear Implants 7 How the CI processes speech (continued) Aural Rehabilitation Cochlear Implants 8 How the CI processes speech (continued) • Electrodes stimulate soma of VIIIth cranial nerve located in spiral ganglion. QuickTime™ and a Sorenson Video decompressor are needed to see this picture. Aural Rehabilitation Cochlear Implants 9 What does a cochlear implant sound like? • One channel implant • Four channel implant • Eight channel implant Aural Rehabilitation Cochlear Implants 10 Surgical Implantation • Play video here Aural Rehabilitation Cochlear Implants 11 Candidates for CI • Adults – Any adults with an intact cochlea. – Severe to profound post-lingual hearing loss. – Time between hearing loss onset and implantation could be a factor – Should be in relatively good health – Age not a factor Aural Rehabilitation Cochlear Implants 12 Candidates for CI • Children – Ages 6 to 18 months or older – Time between hearing loss onset and implantation could be a factor – Profound bilateral hearing loss – Intact cochlea & auditory nerve – Good general health – No otitis media Aural Rehabilitation Cochlear Implants 13 Cochlear Implants and Deaf Community • Hearing Viewpoint – Cochlear Implants “cure” deafness – Allows child to live in hearing world • Deaf Viewpoint – Deafness not a disease but a culture – CIs = genocide, i.e., death of Deaf Culture – NAD is not anti-CI but feels parents need to make an informed choice. Aural Rehabilitation Cochlear Implants 14 Summary Aural Rehabilitation Cochlear Implants 15
