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Relationship between middle ear pressure, mucosal lesion, and mastoid pneumatization
1Department of Otorhinolaryngology, Jikei University School of Medicine, Tokyo, Japan.
The Laryngoscope
|December 16, 1998
Summary
Inflammation in otitis media with effusion (OME) affects mastoid cell growth and gas exchange. Treatment improves these functions, indicating healing of the middle ear mucosa.
Area of Science:
- Otolaryngology
- Pediatric Otitis Media Research
- Middle Ear Physiology
Background:
- Inflammatory changes in middle ear mucosa are implicated in otitis media with effusion (OME) development and healing.
- Mucosal alterations may impact pneumatic space development and transmucosal gas exchange.
Purpose of the Study:
- To determine if histopathologic mucosal changes in OME affect mastoid cell growth and middle ear gas exchange.
- To assess if OME treatment influences these factors.
Main Methods:
- Middle ear mucosal specimens were collected from 65 children with OME during tympanic tube insertion.
- Histopathologic changes were correlated with radiographic mastoid cell growth area and middle ear total pressure (METP) changes.
Main Results:
- Greater mucosal lesions correlated with suppressed mastoid cell growth and lower METP.
- Mastoid pneumatic area significantly expanded after 2 years of tube indwelling.
- Peak METP increased significantly after 1.5 years, indicating recovered gas exchange via CO2 and O2 diffusion/absorption.
Conclusions:
- Subepithelial histopathologic changes in middle ear mucosa significantly impact mastoid cell growth and transmucosal gas exchange.
- These functions show recovery following OME treatment.