High frequency immittance for neonates: a normative study

Autor:	René Hugo, Rina H. Owen, Sonia Werner, Brenda Louw, Andre Swanepoel, De Wet Swanepoel
Rok vydání:	2007
Předmět:	Male medicine.medical_specialty Normative study Distortion product Otoacoustic Emissions Spontaneous Audiology Sensitivity and Specificity Neonatal Screening Reference Values Evoked Potentials Auditory Brain Stem otorhinolaryngologic diseases Humans Medicine Acoustic reflex medicine.diagnostic_test business.industry Infant Newborn Auditory Threshold General Medicine Tympanometry Reflex Acoustic medicine.anatomical_structure Acoustic Impedance Tests Otorhinolaryngology Immittance Reflex Middle ear Female sense organs Middle ear fluid business
Zdroj:	Acta Oto-Laryngologica. 127:49-56
ISSN:	1651-2251 0001-6489
DOI:	10.1080/00016480600740563
Popis:	High frequency immittance measurements demonstrate promise in clarifying middle ear status for neonates but age- and gender-specific norms should be consulted.To describe high frequency immittance measurements using a 1000 Hz probe tone for a sample of 278 neonatal ears (0-4 weeks of age) in order to compile normative tympanometric and acoustic reflex criteria.Assessment of neonatal ears included 1000 Hz probe tone immittance measurements (tympanograms and ipsilateral acoustic reflexes), and distortion product oto-acoustic emission (DPOAE) screening. Results were compared and normative values were compiled for immittance measures in ears controlled for normal middle ear functioning (n=250).Comparison of immittance results to OAE screening outcome provides estimates of sensitivity and specificity for middle ear fluid with tympanometry of 57% and 95%, and 57% and 90% for acoustic reflex presence, and 58% and 87% for combined tympanogram and acoustic reflex results, respectively. Normative data indicate that static peak admittance values differ significantly across gender and age with the 5th percentile cut-off value for the entire sample at 1.4 mmho. The 90% range of tympanic peak pressure normative values increases with increasing age from 140 daPa for neonates 1 week of age to 210 daPa for neonates 2-4 weeks of age. Acoustic reflexes were elicited at 93+/-9 dB with a 90% normality range of 80-105 dB.
Databáze:	OpenAIRE
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