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[Stapedius reflex audiometry as an objective screening test in newborn infants]
Laryngologie, Rhinologie, Otologie
|January 1, 1987
Summary
The stapedial reflex is reliable in newborns using higher probe tone frequencies. A 1200 Hz frequency is optimal for assessing neonatal hearing and identifying hearing loss.
Area of Science:
- Audiology
- Neonatal Medicine
- Otoacoustic Emissions
Context:
- The reliability of the stapedial reflex in neonates has been historically questioned.
- Previous research suggested higher probe tone frequencies may improve detection.
- Neonatal hearing screening is crucial for early intervention.
Purpose:
- To evaluate the efficacy of higher probe tone frequencies (800 and 1200 Hz) for assessing the stapedial reflex in neonates.
- To determine the optimal frequency for reliable stapedial reflex measurements in newborns.
- To differentiate between normal hearing and hearing loss in neonates using impedance audiometry.
Summary:
- Forty neonates were tested using 800 Hz and 1200 Hz probe tone frequencies to measure impedance change amount and phase.
- Results indicated that 1200 Hz is more suitable for investigating neonatal stapedial reflex activity.
- The Niemeyer-Sesterhenn equation was used, successfully identifying normal hearing in 29 infants, with limitations noted in 7 due to movement and 4 false positives.
Impact:
- Establishes 1200 Hz as a more effective probe tone frequency for neonatal stapedial reflex testing.
- Provides objective data for early identification of hearing impairments in newborns.
- Highlights the need to address factors contributing to false positive results in neonatal hearing assessments.