Change in endolymphatic hydrops 2 years after endolymphatic sac surgery evaluated by MRI

This study was performed to determine whether endolymphatic sac surgery improves vestibular and cochlear endolymphatic hydrops 2 years after sac surgery and to elucidate the relationship between the degree of improvement of endolymphatic hydrops and the changes in vertigo symptoms, the hearing level, and the summating potential/action potential ratio (−SP/AP ratio) by electrocochleography (ECochG) in patients with Ménière's disease (MD).

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