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[Sensorineural hearing loss in chronic otitis media].

K Y Ho1, Y K Chen, K H Juan

  • 1Department of Otorhinolaryngology, Kaohsiung Medical College, Taiwan, Republic of China.

Gaoxiong Yi Xue Ke Xue Za Zhi = the Kaohsiung Journal of Medical Sciences
|September 1, 1991
PubMed
Summary

Chronic otitis media (COM) can cause mixed hearing loss. Raised bone conduction thresholds in COM are likely due to the Carhart effect, not inner ear damage.

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Area of Science:

  • Otolaryngology
  • Audiology

Context:

  • Chronic otitis media (COM) frequently presents with mixed hearing impairments.
  • The cause of elevated bone conduction thresholds in COM remains unclear, with debate on whether it reflects middle ear pathology or inner ear damage.

Purpose:

  • To investigate the relationship between the severity of chronic otitis media and sensorineural hearing loss.
  • To determine if elevated bone conduction thresholds in COM are indicative of inner ear damage or conductive hearing loss.

Summary:

  • A review of 65 patients with unilateral COM categorized into simple COM, COM with granulation, and COM with cholesteatoma was conducted.
  • Sensorineural hearing loss was most pronounced in the cholesteatoma group (20.3 dB PTA) and air conduction loss was highest overall (66.8 dB).
  • Sensorineural hearing loss exceeded normal contralateral ears across all groups, suggesting middle ear disease can impact inner ear function, though often not clinically significant.

Impact:

  • Findings suggest that more severe middle ear disease in COM may contribute to sensorineural hearing loss.
  • Elevated bone conduction thresholds in COM are more likely attributed to the Carhart effect than inner ear damage.
  • The study indicates that while sensorineural hearing loss can occur in COM, it is typically not clinically significant for most patients.

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