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Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
Published on: January 23, 2017
[The normal values of multiple-frequency tympanometry in normal newborns].
Lihui Huang1, Ruibang Dai, Lingyan Mo
1Department of Clinical Audiology Center, Beijing Institute of Otolaryngology, Affiliated Beijing Tongren Hospital of Capital University of Medical Sciences, Beijing, 100005, China.
Multiple-frequency tympanometry in newborns reveals distinct normal ranges for middle ear admittance, susceptance, and conductance. The 1000 Hz probe tone tympanometry is identified as a sensitive test for assessing newborn middle ear function.
Area of Science:
- Audiology
- Pediatric Otolaryngology
- Neonatal Health
Context:
- Middle earImpedance testing is crucial for evaluating hearing in infants.
- Standard tympanometry uses a single probe tone frequency (226 Hz), which may not fully characterize the developing middle ear in newborns.
Purpose:
- To establish normal ranges for middle ear admittance, susceptance, and conductance using multiple probe tone frequencies (226 Hz, 678 Hz, 1000 Hz) in healthy newborn infants.
- To compare the characteristics of tympanograms obtained with different probe tone frequencies in this population.
Summary:
- Tympanometries were performed on 55 newborn infants using 226 Hz, 678 Hz, and 1000 Hz probe tones.
- Results showed distinct patterns: 226 Hz tympanograms were predominantly W-shaped, while 678 Hz and 1000 Hz tympanograms were mainly single-peaked.
- Significant differences in admittance, susceptance, and conductance were observed across frequencies, with 1000 Hz tympanometry proving sensitive for middle ear function.
Impact:
- Provides normative data for multiple-frequency tympanometry in newborns, aiding in accurate diagnosis.
- Highlights the utility of higher probe tone frequencies (1000 Hz) for a more sensitive assessment of middle ear function in neonates.
- Supports the use of advanced tympanometry techniques for early detection of auditory pathway abnormalities in infants.
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