Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2005
Intraoperative electrophysiologic identification of the nervus intermedius.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Ashram Yasmine A, Jackler Robert K, Pitts Lawrence H, Yingling Charles D
Аннотация
OBJECTIVE: Although enormous attention has been directed to the localization and preservation of the facial nerve in acoustic neuroma surgery, the nervus intermedius has largely been ignored. In this article, we describe a method for intraoperative electrophysiologic identification of the nervus intermedius.
STUDY DESIGN: Retrospective case review.
SETTING: University hospital (tertiary care center).
PATIENTS: Thirty-three patients who underwent intraoperative facial nerve monitoring for various cerebellopontine angle procedures. Recording electrodes were placed in the orbicularis oculi and orbicularis oris muscles. A constant-voltage stimulator was used to stimulate both the facial nerve and the nervus intermedius.
INTERVENTIONS: None.
MAIN OUTCOME MEASURE: Electrophysiologic response after stimulation of the nervus intermedius.
RESULTS: Stimulation of the nervus intermedius produced long-latency, low-amplitude response recorded only on the orbicularis oris channel. The response had a mean threshold 0.4 V, a mean latency of 11.1 ms, and a mean amplitude of 11.1 microV, all significantly different from responses to stimulation the facial nerve.
CONCLUSION: Knowledge of electrophysiologic features of nervus intermedius stimulation can help protect the facial nerve during cerebellopontine angle surgery. The surgeon must recognize that stimulation of the nervus intermedius can cause electromyographic activity in the facial nerve monitoring channels, but the main trunk of the facial nerve may lie in entirely different location in the cerebellopontine angle.
STUDY DESIGN: Retrospective case review.
SETTING: University hospital (tertiary care center).
PATIENTS: Thirty-three patients who underwent intraoperative facial nerve monitoring for various cerebellopontine angle procedures. Recording electrodes were placed in the orbicularis oculi and orbicularis oris muscles. A constant-voltage stimulator was used to stimulate both the facial nerve and the nervus intermedius.
INTERVENTIONS: None.
MAIN OUTCOME MEASURE: Electrophysiologic response after stimulation of the nervus intermedius.
RESULTS: Stimulation of the nervus intermedius produced long-latency, low-amplitude response recorded only on the orbicularis oris channel. The response had a mean threshold 0.4 V, a mean latency of 11.1 ms, and a mean amplitude of 11.1 microV, all significantly different from responses to stimulation the facial nerve.
CONCLUSION: Knowledge of electrophysiologic features of nervus intermedius stimulation can help protect the facial nerve during cerebellopontine angle surgery. The surgeon must recognize that stimulation of the nervus intermedius can cause electromyographic activity in the facial nerve monitoring channels, but the main trunk of the facial nerve may lie in entirely different location in the cerebellopontine angle.
Предметные рубрики MeSH
AdolescentAdultAfferent PathwaysAgedAgeusiaBlinkingChildChorda Tympani NerveCranial Nerve InjuriesCranial NervesEarElectrodiagnosisElectromyographyFacial NerveFacial Nerve InjuriesFacial ParalysisFemaleHumansMaleMiddle AgedMonitoring, IntraoperativeNasolacrimal DuctNeuroma, AcousticPostoperative ComplicationsPrognosisReaction TimeRetrospective StudiesSensory ThresholdsTears