• Cochlear implants are surgically placed
electrical device that receive sound and
transmit the resulting electrical signals to
electrodes implanted in the cochlea of the ear.
• The signals stimulate cochlea, allowing patient
• It is also known as Bionic ear.
Parts of cochlear implant
– Speech processor
– Receiver and stimulator
– An array of up to 22 electrodes
• Cochlear implants bypass damaged portion of
the ear & directly stimulate the auditory nerve
and later the brain recognizes it as sound.
Ideal candidate for cochlear
• Having severe to profound sensori-neural
deafness in both ears.
• Having a functioning auditory nerve.
• Approximately 70+ decibel hearing loss.
• Having good speech, language and
• Not benefitting enough from other kinds of
• Having no medical reason to avoid surgery.
• Living in or desiring to live in the “hearing
• Having realistic expectations about result.
• Physically and mentally normal person.
• No medical contra-indications.
• Wound healing problems viz skin breakdown,
infection at surgical site and device coming
• CSF leakage
• Vertigo (temporary dizziness)
• Device failure