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Secretory otitis media and high-frequency hearing loss
H Löppönen1, M Sorri, R Pekkala
1Department of Otolaryngology, University of Oulu, Finland.
Insights
Children treated for otitis media with effusion (SOM) may experience high-frequency hearing loss. This conductive hearing impairment, affecting the middle ear, can persist years after treatment.
Area of Science:
- Otolaryngology
- Audiology
- Pediatric Medicine
Background:
- Otitis media with effusion (SOM) is a common childhood condition.
- Tympanostomy tube insertion is a standard treatment for persistent SOM.
- Long-term effects of SOM and its treatment on hearing are not fully understood.
Purpose of the Study:
- To investigate long-term hearing outcomes in children treated for SOM.
- To assess high-frequency hearing thresholds in children with a history of SOM.
- To differentiate between conductive and sensorineural hearing loss following SOM.
Main Methods:
- Follow-up examination of 31 children treated for SOM with tympanostomy tubes.
- Inclusion of 29 age-matched healthy controls.
- Comprehensive audiological assessment including pure-tone audiometry and high-frequency audiometry (6-18 kHz).
Main Results:
- High-frequency hearing loss (6-18 kHz) was identified in the SOM group.
- Hearing loss was primarily conductive, suggesting tympanic membrane and middle ear changes.
- Evidence of sensorineural hearing loss, indicating cochlear involvement, was also observed.
Conclusions:
- SOM and tympanostomy treatment can lead to persistent high-frequency conductive hearing loss.
- Potential cochlear damage may contribute to sensorineural hearing deficits.
- Longitudinal studies are crucial for understanding the full impact of SOM on auditory health.
Abstract:
31 children (mean age 13 years; range 8.5-17.2) who had been tympanostomy treated for SOM during the years 1977-1980 were invited for follow-up examination. 29 normal age peers were enrolled as controls. The test battery included clinical pneumotoscopical examination and conventional pure-tone audiometry as well as air-conduction and electric bone-conduction high-frequency audiometry. High-frequency hearing losses (6-18 kHz) were found as sequels of SOM. The median threshold difference between the SOM group and the controls varied from 0 to 10 dB depending on the frequency. The hearing losses were considered to be of the conductive type, and probably related to changes in the tympanic membrane and the middle ear caused by SOM. On the other hand, we found also sensorineural hearing losses suggesting lesion at the cochlear level.