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Eustachian tube closing failure in children with persistent middle ear effusion
Insights
Sniffing can unexpectedly clear middle ear fluid in children with persistent middle ear effusion. This study confirms that Eustachian tube closing failure is common in these cases.
Area of Science:
- Otolaryngology
- Pediatric Medicine
- Physiology
Background:
- The Eustachian tube normally protects the middle ear from nasopharyngeal pressure changes.
- Previous studies indicated sniffing could evacuate middle ear effusion in children.
- Persistent middle ear effusion is a common pediatric condition.
Purpose of the Study:
- To investigate the reproducibility of middle ear evacuation by sniffing in a larger cohort of children.
- To characterize Eustachian tube function in children with persistent middle ear effusion.
Main Methods:
- Investigated 156 ears in 100 children with persistent middle ear effusion.
- Observed and recorded middle ear evacuation events occurring during sniffing.
Main Results:
- Middle ear evacuation via sniffing occurred in 63% of ears (73% of subjects).
- Results were reproducible compared to previous investigations.
- Identified a reduced protective function of the Eustachian tube.
Conclusions:
- Eustachian tube malfunction, specifically "Eustachian tube closing failure," is prevalent in children with persistent middle ear effusion.
- This dysfunction impairs the Eustachian tube's protective role.
- Sniffing may serve as an unintentional mechanism for middle ear fluid clearance in affected children.
Abstract:
One important role of the Eustachian tube is to protect the middle ear from the extensive physiological pressure variations that take place in the nasopharynx, for example on sniffing. In a previous investigation in 50 children with persistent middle ear effusion a surprisingly high percentage of ears were evacuated by sniffing. The present study was undertaken in a second series of children, and results were found to be reproducible. In total 156 ears in 100 children have been investigated. In 63% of ears (73% of subjects) evacuation of the middle ear took place on sniffing. Results show that Eustachian tube malfunction in these subjects is characterized by a reduced protective function; a condition denoted "Eustachian tube closing failure".