Fact-sheet: Perilymphatic fistula
Updated on 08/04/2017 at 8:28 AM
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Definition
Complication of a translabyrinthine fracture or trauma to the windows (oval or round) or of stapedovestibular dislocation.
Clinical features
Triad: sensorineural hearing loss + vertigo + tinnitus
CT
May be normal.
Intravestibular incarceration of the stapes.
Pneumolabyrinth.
Fluid in the tympanic cavity (hemotympanum, perilymphatic fluid)
Management
Tympanometry and videonystagmography: screening.
Demonstration of nystagmus by pressurization of the external auditory canal.
Exploratory tympanotomy followed by sealing of the leak (temporal fascia graft)
+/- total stapedectomy with piston placement and interposition of temporal fascia over the oval window in case of fracture or dislocation of the stapes.
