These are some risks associated with Cochlear Implant
Injury to the facial nerve: facial nerve goes through the middle ear to give movement to the muscles of the face. An injury during surgery can cause a temporary or permanent facial paralysis on the side of the implant.
Meningitis: cases found of meningitis after cochlear implant. People who have abnormally formed inner ear structure are at greater risk.
Tinnitus: ringing or buzzing sound in the ear.
Taste disturbance: the nerve that gives taste sensation to the tongue also goes through middle ear and might be injured during the surgery.
Loss of residual hearing: permanent loss of residual/remaining hearing in implanted ear.
Failure of the internal equipment: contact sport, accident, slips and falls near the ear can damage the implant.
May not be able to have MRI: MRI and some other medical examinations and treatments can not be done due to the presence of magnetic field.
Recipient will have to be careful of electrostatic field and devices.
Source:FDA
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