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Daily impedance audiometric screening of children in a day-care institution. Changes through one month
Insights
Impedance audiometry in daycare children revealed daily tympanometric curve changes. Type C2 curves were most dynamic, while Type B curves showed varied durations, indicating potential middle ear effusion dynamics.
Area of Science:
- Pediatric Audiology
- Otitis Media Research
- Daycare Health Studies
Background:
- Middle ear effusion (MEE) is common in young children, impacting hearing.
- Daycare settings present unique challenges for monitoring children's health.
- Impedance audiometry is a non-invasive tool for assessing middle ear function.
Purpose of the Study:
- To evaluate the daily changes and stability of tympanometric curve types in daycare attendees.
- To specifically assess the frequency and duration of Type B curves, indicative of MEE.
Main Methods:
- Daily impedance audiometry was performed on 57 children over 4 weeks using a Madsen Electronics ZS 330 tympanoscope.
- Tympanometric curves were classified into types A, C1, C2, and B based on pressure and compliance.
- Type B curves were defined by flat patterns or low compliance with absent stapedial reflexes.
Main Results:
- Daily changes were observed in tympanometric types: 4.3% for A+C1, 32.8% for C2, and 9.5% for B.
- A total of 43 episodes of Type B curves occurred, with 16 lasting only one day.
- Some Type B curves persisted for extended periods (8-23 days and 8 cases over 26 days).
Conclusions:
- Tympanometric patterns in daycare children exhibit daily variability, particularly Type C2.
- Type B curves, suggestive of middle ear effusion, show diverse durations, with some persisting long-term.
- Regular impedance audiometry in daycare settings can track middle ear status and identify prolonged effusion.
Abstract:
Fifty-seven children in a fairly new day-care institution were examined daily by impedance audiometry through 4 weeks. A Madsen Electronics ZS 330 tympanoscope was used. The tympanometric curves were divided into types A, C1, C2, and B, indicating pressures over -99 mmH2O, from -100 to -199 mmH2O, below -199 mmH2O and completely flat curves, but in cases in which the compliance was less than 0.25 ml, combined with an absent ipsilateral stapedial reflex, were also interpreted as type B. The object was to ascertain how quickly the types changed and how stable the B curves were. Types A + C1, C2, and B changed daily into other types in 4.3%, 32.8%, and 9.5% respectively. A total of 43 episodes of B curves occurred. Of them 16 lasted for only one day and thereamongst 9 became quite flat. Only a few lasted for 8-23 days and 8 for 26 days or over.
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