Mechanism of Hearing Disturbance after Microvascular Decompression Study with Intraoperative Brain-stem Auditory Evoked Potential Monitoring and Postoperative Otoneurological Examinations

Takayuki OHIRA; Shigeo TOYA; Jin KANZAKI; Yoshiki NAKAMURA; Hiromichi MIYAZAKI; Masashi NAKATSUKASA; Yukio IBATA; Takeshi KAWASE; Moriichirou TAKASE

doi:10.2176/nmc.27.749

Mechanism of Hearing Disturbance after Microvascular Decompression

Study with Intraoperative Brain-stem Auditory Evoked Potential Monitoring and Postoperative Otoneurological Examinations

Takayuki OHIRA, Shigeo TOYA, Jin KANZAKI, Yoshiki NAKAMURA, Hiromichi MIYAZAKI, Masashi NAKATSUKASA, Yukio IBATA, Takeshi KAWASE, Moriichirou TAKASE

Author information

Takayuki OHIRA
Departments of Neurosurgery, Keio University
Shigeo TOYA
Departments of Neurosurgery, Keio University
Jin KANZAKI
Departments of Otorhinolaryngology, Keio University
Yoshiki NAKAMURA
Departments of Neurosurgery, Keio University
Hiromichi MIYAZAKI
Departments of Neurosurgery, Keio University
Masashi NAKATSUKASA
Departments of Neurosurgery, Keio University
Yukio IBATA
Departments of Neurosurgery, Keio University
Takeshi KAWASE
Departments of Neurosurgery, Keio University
Moriichirou TAKASE
Departments of Electroencephalography, Keio University

Keywords: microvascular decompression, auditory evoked potentials, hearing loss, internal auditory artery, auditory nerve

JOURNAL FREE ACCESS

1987 Volume 27 Issue 8 Pages 749-755

DOI https://doi.org/10.2176/nmc.27.749

Details

Abstract

In 35 posterior fossa operations with intraoperative brain-stem auditory evoked potential (BAEP) monitoring, there were seven microvascular decompression (MVD) operations performed for five cases of hemifacial spasm and two of trigeminal neuralgia. Among these seven patients, three cases, two of hemifacial spasm and one of trigeminal neuralgia, showed postoperative hearing disturbance. In these cases, intraoperative BAEPs showed aggravations of all waveform components including wave I. Otoneurological examinations revealed the hearing disturbances were caused not only by retrocochlear lesions but also by cochlear lesions. These findings suggest that postoperative hearing disturbance after MVD surgery is deeply related to circulatory disturbance of the internal auditory artery.

Corresponding author

Register with J-STAGE for free!