年次大会
Online ISSN : 2424-2667
ISSN-L : 2424-2667
2018
セッションID: J0240302
会議情報

振動子を用いた耳小骨直接加振による蝸牛マイクロホン電位(CM)の術中計測
*藤城 孝明海老根 崚入江 優花徐 世傑肥後 武展大山 工作池上 元林 正晃神埼 晶小池 卓二
著者情報
会議録・要旨集 フリー

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抄録

Cochlear microphonic (CM) is known to faithfully correspond to the frequency and level of sound pressure applied to the cochlea. If the CM is measured and compared before and after the treatment during an otologic surgery, the improvement of hearing of patients can be evaluated, and the risk of reoperation can be decreased. However, in some operations the sound transmission mechanism of the middle ear is temporarily disabled, and sound pressure cannot be applied to the cochlea with a speaker. In this study, a system for measuring the CM during surgery was constructed. The system consists of a vibration probe, electrodes, amplifier, and controller. The ossicles are vibrated by the vibration probe instead of sound from speaker, and the CM signals generated by the vibration are measured. The CM amplitude increased in proportion to the input voltage to the vibrator in the vibration probe as is the case with sound stimulation. This result suggests that the intraoperative assessment of improvement of hearing is possible by using the vibration probe.

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