Sensori-neural Deafness

Sensory hearing loss sensory nerve impairment is medically irreversible. It is due to dysfunction of the inner ear. Therefore, as sound reaches the inner ear, they will not advance any further. Under normal conditions, sound is transmitted to the brain. Hearing impairment has various forms. When a chromosome from either parent is destroyed like a genetic blueprint. This is the main reason for children born before the birth of a child.

There are three kinds of hearing loss. Conductive hearing loss, sensory nerve loss, and mixing. Conductive hearing loss is caused by problems with the external or middle ear. Most conductive hearing loss can be treated medically or surgically. However, these can not be treated with the cochlear implant. Sensory hearing loss is caused by inner ear and auditory nerve problems. If the cochlea is damaged, the sound may be distorted. In addition, the extent of hearing loss depends on the degree of damage it is in and the location within the cochlea (NIDCD3). Mixed hearing loss is a combination of electrical and sensory nerve loss. When it becomes deep hearing loss, we usually talk about hearing loss, but sometimes this also applies to mixed hearing loss.

There are 15 million severe hearing impaired people in the United States. However, less than 1% of them are potential candidates for the cochlear implant. Preferred signs of implantation are severe bilateral sensory deafness on both sides (both ears). In other words, even with the help of a hearing aid, hearing impaired people will still become hearing impaired. Sensor with sound processed brain - nerve connection should still be feasible. Traditionally, regular candidates are adults who live healthy and live longer. Medical history and clinical laboratory tests are used to plan the entire program. Many physical limitations may be discovered later, which will preclude the porting of candidates (NIDC D 10 - 12). Further complexity is that the degree of success of the cochlear implant in a particular population can not be predicted in advance.