Intralabyrinthine Penetrating Ventilation Tube with Preservation of Hearing: An Unusual Clinical Situation

Abstract

Introduction Traumatic perilymphatic fistula is not a rare event with regards to sport activities or traffic accident. However, iatrogenic damage to the inner ear can occur following the common use of grommets and ventilation tube insertion. Objectives To report an unusual case of insertion of aeration tube into the vestibule trough the stapes footplate. Resumed Report A 62-year-old woman experienced iatrogenic penetration into the vestibule from a ventilation tube inserted for retraction pocket management. The event was misdiagnosed both by the surgeon and by the emergency room physicians, leading to delay in the management. However, preservation of the hearing function lasted for 2 weeks prior to deafness, thanks to the valve of Bast, which preserved the cochlear fluid. Conclusion This case gives us the opportunity to stress the need for systematic clinical examination of traumatic injury to the ear and to recommend performing multiplanar millimetric computed tomography scan with accurate interpretation. Traumatic injuries should be referred to a dedicated traumatic emergency referral center.

The Vestibular Implant: Hearing Preservation during Intralabyrinthine Electrode Insertion—A Case Report

“…These forces could violate the other inner ear structures (32). Fourth, a competent valve of Bast could preserve hearing, at least for some period of time (33). A combination of these factors might explain the initial only little timeshift of the ABR signal after completely opening the semicircular canals during this experiment and the apparent reoccurrence of peak V (with altered morphology) after opening the vestibulum.…”