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  • Title: Preservation of cochlear potentials in a deaf patient fifteen months after excision of an acoustic neuroma.
    Author: Sabin HI, Prasher D, Bentivoglio P, Symon L.
    Journal: Scand Audiol; 1987; 16(2):109-11. PubMed ID: 3629171.
    Abstract:
    Intraoperative electrocochleographic monitoring has been used in an attempt to protect cochlear nerve function during acoustic neuroma excision. One patient is presented with an apparently intact cochlear nerve and waves N1 and N2 preserved at the end of surgery, but no hearing on subsequent testing. Fifteen months after operation, cochlear microphonics and the summating potential were still present, but N1 and N2 had disappeared. There had been no improvement in her hearing and there were no consistent brainstem auditory evoked potentials on the affected side. A possible explanation for these findings is given.
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