15/ v03p115.pdfCochlear Implant can be used in patients with sensorineural hearing loss on the side contralateral to the acoustic tumorwho have a functionally intact cochleovestibular nerve on that side. Patient must also have anadequate surviving spiral ganglion cell population on the side of implantation, if it is to be successful.Often of no help on the affected side, since the cochleovestibular nerve is usually functionallycompromised during the surgical removal of the lesion. However, in rare cases when the nerve is leftfunctionally intact but the cochlea is left damaged, the cochlear implant has been used successfully.Auditory# Brainstem Implant is currently used only in patients with NF-2 and is always implanted simultaneously with tumorremoval (usually during excision of the patient's second tumor). It is useful in patients who have hadboth cochleovestibular nerves sacrificed, since this implant stimulates the cochlear nuclear complexin the brainstem directly">