Pneumo‐Membranous Labyrinth After Hyperbaric Oxygen Therapy for Sudden Sensorineural Hearing Loss

Pneumo‐membranous labyrinth is an almost unique condition, in which air extends into the membranous labyrinth, filling the endolymphatic sac through the vestibular aqueduct. In this manuscript, we describe and discuss a case of pneumo‐membranous labyrinth, with air bubbles extending also to the endolymphatic sac, resulting in anacusis, following hyperbaric oxygen therapy for sudden sensorineural hearing loss. The patient was successfully rehabilitated with a cochlear implant, obtaining a pure‐tone average of 30 dB, with a speech discrimination score of 100% at 70 dB. Laryngoscope, 134:3773–3777, 2024 Pneumo‐membranous labyrinth is an almost unique condition, in which air extends into the membranous labyrinth, filling the endolymphatic sac through the vestibular aqueduct. In this manuscript, we describe and discuss a case of pneumo‐membranous labyrinth, with air bubbles extending also to the endolymphatic sac, resulting in anacusis, following hyperbaric oxygen therapy for sudden sensorineural hearing loss. The patient was successfully rehabilitated with a cochlear implant, obtaining a pure‐tone average of 30 dB, with a speech discrimination score of 100% at 70 dB.