Acute cochleovestibular toxicity due to topical application of potassium iodide

We present a case report of a patient who suffered from an acute cochleoves tibular deficit after topical application of potassium iodide solution into the left ear. Although the vestibular symptoms progressively disappeared, severe sensorineural hearing loss persisted after treatment with hyperbaric oxygen therapy and intravenous administration of corticosteroids and vasod ilating agents. The mechanisms of ototoxicity after topical application of solutions are discussed with emphasis on the particular features of the pre sent case: a patulous Eustachian tube syndrome and the presence of a tympan ostomy tube in the left ear.