The potential dysfunction of otolith organs in patients after mumps infection
by Yu-Juan Zhou, Jing Yu, Yong-Zhen Wu, Liang Tian, Zhao Han, Jing Wang, Fang-Lu Chi
ObjectiveTo investigate the relationship between mumps and the extent of hearing impairment and otolith organ damage.
MethodsA total of 27 patients with unilateral hearing impairment following mumps were enrolled. The degrees of hearing loss and otolith organ damage were confirmed by audiometric and vestibular evoked myogenic potential [VEMP] tests. All the results were compared and analyzed using Stata 13.0 software for Windows.
ResultsThe VEMP thresholds of the affected ears were significantly higher than those of the unaffected ears in both tests (cervical VEMP [cVEMP] test and ocular VEMP [oVEMP] test; p = 0.000 and 0.001, respectively). The mean cVEMP and oVEMP threshold values of the affected ears with hearing impairment for ≤10 years were significantly lower than those of affected ears with hearing impairment for >10 years [p = 0.009 and 0.004, respectively].
ConclusionsDeafness resulting from mumps is usually profound and permanent, which indicates severe damage to the cochlea due to the disease. The functions of otolith organs in the vestibular system are also impaired. Over time, the function of the otolith organs or their neural pathway may suffer secondary damage.
Publisher URL: http://journals.plos.org/plosone/article
DOI: 10.1371/journal.pone.0181907
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