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Either bacterial or viral labyrinthitis can cause a permanent hearing loss in rare cases. [7] This appears to result from an imbalance of neuronal input between the left and right inner ears. [ 8 ]
Labyrinthine fistula can be both congenital or develop over time with the thinning of the otic capsule by the persistent pulsations of the intracranial pressures against the bones of the skull. Finally, medical conditions (e.g. cholesteatoma ) can result in a labyrinthine fistula. [ 3 ]
Studies that measured recovery time have noted that the time required is related to the magnitude of the initial hearing loss. [12] The most significant recovery was found to occur during the first 15 minutes following cessation of the noise exposure. [13] [14] When sufficient recovery time is not allotted, the effects become permanent ...
Recovery of hearing is usually within 24 hours but may take up to a week. [8] Both constant exposure to loud sounds (85 dB(A) or above) and one-time exposure to extremely loud sounds (120 dB(A) or above) may cause permanent hearing loss. [9]
Otitis interna, or labyrinthitis, involves the inner ear. The inner ear includes sensory organs for balance and hearing. When the inner ear is inflamed, vertigo is a common symptom. Other symptoms in adults include pain and drainage from ear or problems with hearing. [8]
Diseases of the vestibular system can take different forms and usually induce vertigo [citation needed] [13] and instability or loss of balance, often accompanied by nausea. The most common vestibular diseases in humans are vestibular neuritis, a related condition called labyrinthitis, Ménière's disease, and BPPV.
In cases where hearing loss and continuing severe episodes of vertigo occur, a chemical labyrinthectomy, in which a medication such as gentamicin is injected into the middle ear and kills parts of the vestibular apparatus, may be prescribed. [4] [25] [26] This treatment has the risk of worsening hearing loss. [25]
Hearing loss is likely, or inflammation of the labyrinth of the inner ear (labyrinthitis) may occur, producing vertigo and an ear ringing may develop along with the hearing loss, making it more difficult to communicate.
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