cochleosacculotomy

An operation for Ménière disease performed through the round window to create a shunt between the cochlear duct and the saccule.

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coch·leo·sac·cu·lot·o·my (kok″le-o-sak″u-lotґə-me) creation of a fistula between the saccule and cochlear duct by means of a pick introduced through the round window, in order to relieve endolymphatic hydrops.