Cochlear implant
Cochlear implant (CI) is a surgically implanted electronic device that provides a sense of sound to a person who is profoundly deaf or severely hearing impaired. Cochlear implant is often called the bionic ear.
In April 2009 there were approximately 188,000 people worldwide have received cochlear implants;. United States, about 40,000 adults and 30,000 children are the beneficiaries The vast majority are in developed countries due to the high cost of device therapy, surgery and post-implantation. A small but growing segment of recipients of bilateral implants (one implant in each cochlea) .
Cochlear implants can restore hearing in patients with deafness due to loss of sensory cells in the cochlea. In these patients, can often be enough to restore hearing to the understanding of spontaneous speech in a quiet area, but restoring the power of the audience is much less rich than natural hearing, and offers only the appreciation of the musical melody very limited, or understanding speech in noisy environments.
People with mild or moderate hearing loss of perception are generally not candidates for cochlear implantation. Their needs can often be greeted with hearing aids alone and hearing aids with an FM system. When the implant is put in place sound does not travel more around the ear canal and middle ear, but it will be picked up by a microphone and sent through the device of speech processing to implant electrodes in the inside the cochlea. Thus, most candidates have been diagnosed with profound sensorineural hearing loss.
The presence of auditory nerve fibers is essential for a functioning device: if they are so damaged they can not receive electrical stimulation, the implant does not work. A small number of people with severe auditory neuropathy can also benefit from a cochlear implant
t was estimated in 2002 that nearly 10,000 children in the United States and another 49 000 people worldwide have received cochlear implants. At the end of 2008, the total number of cochlear implant recipients has grown to about 150,000 worldwide. A story in 2000 said that one of ten deaf children in the United States have a cochlear implant, and that the projection was the ratio would increase to one in three in ten years.
In April 2009 there were approximately 188,000 people worldwide have received cochlear implants;. United States, about 40,000 adults and 30,000 children are the beneficiaries The vast majority are in developed countries due to the high cost of device therapy, surgery and post-implantation. A small but growing segment of recipients of bilateral implants (one implant in each cochlea) .
Cochlear implants can restore hearing in patients with deafness due to loss of sensory cells in the cochlea. In these patients, can often be enough to restore hearing to the understanding of spontaneous speech in a quiet area, but restoring the power of the audience is much less rich than natural hearing, and offers only the appreciation of the musical melody very limited, or understanding speech in noisy environments.
People with mild or moderate hearing loss of perception are generally not candidates for cochlear implantation. Their needs can often be greeted with hearing aids alone and hearing aids with an FM system. When the implant is put in place sound does not travel more around the ear canal and middle ear, but it will be picked up by a microphone and sent through the device of speech processing to implant electrodes in the inside the cochlea. Thus, most candidates have been diagnosed with profound sensorineural hearing loss.
The presence of auditory nerve fibers is essential for a functioning device: if they are so damaged they can not receive electrical stimulation, the implant does not work. A small number of people with severe auditory neuropathy can also benefit from a cochlear implant
t was estimated in 2002 that nearly 10,000 children in the United States and another 49 000 people worldwide have received cochlear implants. At the end of 2008, the total number of cochlear implant recipients has grown to about 150,000 worldwide. A story in 2000 said that one of ten deaf children in the United States have a cochlear implant, and that the projection was the ratio would increase to one in three in ten years.
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