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Published in:
2016 | OriginalPaper | Chapter
21. Cochlear Implants
Author : Vinod Kumar Khanna
Published in: Implantable Medical Electronics
Publisher: Springer International Publishing
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Abstract
Cochlear implantation is a multidisciplinary therapy capable of treating acute-to-overwhelming sensorineural hearing loss in children and adults. The cochlear implant system comprises a two-piece equipment. The equipment consists of an internal part that requires surgical placement, and an external part generally worn behind the ear. The internal part of the implant consists of a receiver–stimulator containing the electronic circuitry, the receiving antenna, a magnet, and an electrode array. Direct electrical stimulation is provided to the auditory nerves by inserting the electrode array inside the cochlea. The external part is battery-powered. It consists of a microphone to pick up sound, a speech processor with manual controls, and a transmitting coil to convey information to the internal part of the implant. The two parts work in tandem. Following this implantation, most adults can converse on the telephone, while children can pursue mainstream classrooms.