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Study of middle ear disease using tympanometry in general practice
Insights
Tympanometry identified middle ear effusions in 31% of children, with nearly half persisting for three months. European children and those with a family history of otitis media were more likely to have effusions.
Area of Science:
- Pediatrics
- Otolaryngology
- General Practice
Background:
- Middle ear effusion (MEE) is a common condition in children.
- Accurate diagnosis and understanding risk factors are crucial for effective management.
- Tympanometry is a key diagnostic tool for MEE.
Purpose of the Study:
- To investigate the prevalence and persistence of middle ear effusions in young children using tympanometry.
- To identify risk factors associated with middle ear effusion in a general practice setting.
- To compare the diagnostic accuracy of tympanometry with pneumatic otoscopy.
Main Methods:
- Prospective study of 264 children aged 3 months to 6 years.
- Tympanometry performed to detect middle ear effusions.
- Pneumatic otoscopy used for comparison.
- Follow-up to assess persistence of effusions.
Main Results:
- Middle ear effusion detected in 31% of children at study entry.
- 42% of effusions persisted for at least three months.
- European descent, sibling history of otitis media, and younger age (<3 years) were associated with higher MEE prevalence.
- MEE was associated with recent respiratory infection or otalgia, but not previous child history of otitis media.
- Pneumatic otoscopy sensitivity for MEE was 55% (appearance alone) and 76% (with mobility).
Conclusions:
- Tympanometry is valuable for detecting middle ear effusions in children.
- Persistence of middle ear effusion is common.
- Risk factors like ethnicity and family history influence MEE prevalence.
- Further research is needed to establish the natural history and referral guidelines for pediatric middle ear effusion.
Abstract:
Tympanometry was used to provide evidence of middle ear effusions in a prospective study of middle ear disease in 264 children aged 3 months to 6 years in general practice. Adequate measurements on both ears were obtained in 220 children, of whom 68 (31%) had evidence of middle ear effusion in one ear (29 children) or both ears (39 children) at entry to the study. In 28 (42%) of the 68 children persistence of the tympanometric findings was recorded for at least three months. Children of European descent were more likely to have evidence of middle ear effusion at the initial examination compared with African and West Indian children, as were those children whose siblings had a positive history of otitis media compared with those whose siblings had no such history. Children under 3 years were more likely to have evidence of an effusion than older children. Middle ear effusion as shown by tympanometry was not associated with a previous history of otitis media in the child but was associated with recent symptoms of respiratory infection or otalgia. A previous consultation for otitis media was, however, strongly associated with a greater likelihood of a consultation for otitis media during the follow up period. Comparing evidence of effusion by tympanometry with that by pneumatic otoscopy showed that using the appearance of the eardrum alone the sensitivity of otoscopy was 55%; the addition of mobility improved the sensitivity to 76% with little reduction in specificity. Further studies on populations using tympanometry are needed to determine the natural history, aetiology, and indications for referring children with middle ear effusion.