What are the patient criteria for totally implantable devices mentioned in the chapter?

Patient criteria for totally implantable devices include bilateral stable sensorineural hearing loss, a speech discrimination score of 40% or higher, a healthy tympanic membrane and ossicles, sufficient ear cavity size, at least 30 days of hearing aid experience, and the absence of certain infections and conditions.

The criteria for patients to be considered for totally implantable devices are specific and include having bilateral stable sensorineural hearing loss and a speech discrimination score of 40% or higher. Additionally, patients must have a healthy tympanic membrane, eustachian tube, and ossicles of the middle ear, as well as a large enough ear cavity to accommodate the device components. They should also have at least 30 days of experience with an appropriate hearing aid and must not have any middle ear, inner ear, or mastoid infections, Ménière disease, recurring vertigo, or sensitivity to the materials used in the device.