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Sensorineural hearing loss in otitis media
Abstract:
Additional evidence is presented to support the hypothesis that both acute purulent otitis media (POM) and chronic suppurative otitis media (COM) can cause high frequency sensorineural hearing loss. In selected patients and in animals (chinchillas) in a pilot study using electrophysiological methods, both temporary threshold shifts and permanent threshold shifts of basal cochlear turn involvement were demonstrated in POM. Data of cochlear involvement in 475 ears with bilateral COM, 607 ears with unilateral COM, and 607 ears serving as controls were obtained from six centers in five countries. In group 1 (15 dB or greater), 43% of ears with unilateral COM and 42% of ears with bilateral COM showed losses, for a combined odds ratio eight times that in controls. In group 2 (30 dB or greater), 16% of ears with unilateral COM and 17% of ears with bilateral COM demonstrated, respectively, seven and ten times that in controls. These statistically significant findings influence clinical considerations.
Insights
Acute and chronic suppurative otitis media can cause high-frequency sensorineural hearing loss. This study found significant cochlear involvement and hearing loss in patients with otitis media compared to controls.
Area of Science:
- Otolaryngology
- Audiology
- Neuroscience
Background:
- Otitis media, encompassing acute purulent otitis media (POM) and chronic suppurative otitis media (COM), is a common condition affecting the middle ear.
- Previous research suggests a link between otitis media and hearing impairment, but the specific mechanisms and extent of cochlear involvement require further elucidation.
Purpose of the Study:
- To investigate the association between acute purulent otitis media (POM) and chronic suppurative otitis media (COM) and high-frequency sensorineural hearing loss.
- To evaluate cochlear involvement and hearing threshold shifts in patients with POM and COM using electrophysiological methods and large-scale data analysis.
Main Methods:
- A pilot study utilizing electrophysiological methods in selected patients and chinchillas demonstrated temporary and permanent threshold shifts in POM.
- A multi-center, cross-sectional study analyzed data from 475 ears with bilateral COM, 607 ears with unilateral COM, and 607 control ears.
Main Results:
- In POM, temporary and permanent threshold shifts of basal cochlear turn involvement were observed.
- Statistically significant hearing losses (15 dB or greater) were found in 43% of unilateral COM and 42% of bilateral COM ears, with odds ratios eight times higher than controls.
- More severe hearing losses (30 dB or greater) were present in 16% of unilateral COM and 17% of bilateral COM ears, showing seven and ten times the odds compared to controls, respectively.
Conclusions:
- Both acute purulent otitis media and chronic suppurative otitis media are significant contributors to high-frequency sensorineural hearing loss.
- The findings underscore the importance of considering otitis media as a cause of hearing impairment and highlight the need for clinical vigilance and management.