Cases in which cochlear implantation cannot be done for deafness include inner ear malformations, auditory nerve defects, and so on.
Absolute contraindications for cochlear implantation: severe inner ear deformity, auditory nerve defects, severe mental illness, acute suppurative otitis media, etc. These conditions are absolute contraindications to cochlear implantation.
Relative contraindications for cochlear implantation: poor general condition due to concomitant diseases; uncontrollable epilepsy; patients with chronic suppurative otitis media, patients with tympanic membrane perforation and so on.
A cochlear implant is an electronic device that is currently a more mature means of treating deafness. Whether or not it is possible to undergo this treatment needs to be evaluated by a doctor, and it is recommended that patients with deafness seek out regular hospitals to inquire about it.