A parent tells the school nurse that his child has had extensive hearing tests and has been found to have a sensorineural hearing loss. The nurse will respond to the parent based on the knowledge that this type of hearing loss:
a. can be helped by one or more of the four types of hearing aids available today
b. has benefited in some cases by the relatively new technique of a cochlear implant
c. has not been helped by hearing aids or other techniques
d. is best adapted to by learning to speak sign language and attending a school for people who are deaf
B
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A Incorrect. A sensorineural hearing loss does not improve with amplification of a hearing aid. The defect is not one of intensity of sound. Children with this type of hearing loss have damage to the tiny hairs lining the cochlea or to nerve cells that transmit auditory stimuli to the brain. Hearing aids provide little benefit because even amplified sounds cannot be processed as a result of damage to the inner ear.
B Correct. A sensorineural hearing loss results from damage to the inner ear structures or the auditory nerve. This type of hearing loss results in distortion of sound and problems in discrimination. Although the child hears some of everything, the sounds are distorted, severely affecting discrimination and comprehension. This hearing loss has benefited in some cases by the relatively new technique of a cochlear implant.
C Incorrect. A sensorineural hearing loss will not have been helped by hearing aids, but other techniques such as cochlear implantation have helped.
D Incorrect. Implantation of cochlear devices as early as possible in children with sensorineural hearing loss appears to facilitate development of speech.
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