Aithal Venkatesh, Kei Joseph, Driscoll Carlie, Murakoshi Michio, Wada Hiroshi
a Department of Audiology , Townsville Hospital and Health Service , Douglas , QLD , Australia.
b Hearing Research Unit for Children School of Health and Rehabilitation Sciences , University of Queensland , Brisbane , QLD , Australia.
Int J Audiol. 2017 Mar;56(3):154-163. doi: 10.1080/14992027.2016.1244867. Epub 2016 Oct 26.
International Journal of Audiology To study the developmental characteristics of sweep frequency impedance (SFI) measures in healthy infants from birth to 6 months.
All infants were assessed using high-frequency tympanometry (HFT), distortion product otoacoustic emission (DPOAE) and SFI tests. SFI measures consisted of measurement of resonance frequency (RF) and mobility (ΔSPL) of the outer and middle ear. A mixed model analysis of variance was applied to the SFI data to examine the effect of age on RF and ΔSPL.
Study included 117 ears from 83 infants of different age groups from birth to 6 months.
The mean RF of the outer ear increased from 279 Hz at birth to 545 Hz at 4 months, whereas mean ΔSPL of the outer ear decreased from 7.9 dB at birth to 3.7 dB at 4 months of age. In contrast, the mean RF and ΔSPL of the middle ear did not change significantly with age up to 6 months.
Developmental characteristics should be considered when evaluating the function of the outer and middle ear of young infants (≤6 months) using the SFI. The preliminary normative SFI data established in this study may be used to assist with the evaluation.
《国际听力学杂志》研究出生至6个月健康婴儿的扫频声阻抗（SFI）测量的发育特征。
所有婴儿均使用高频鼓室图（HFT）、畸变产物耳声发射（DPOAE）和SFI测试进行评估。SFI测量包括测量外耳和中耳的共振频率（RF）和导纳（ΔSPL）。对SFI数据应用混合模型方差分析，以检验年龄对RF和ΔSPL的影响。
研究纳入了83名出生至6个月不同年龄组婴儿的117只耳朵。
外耳的平均RF从出生时的279Hz增加到4个月时的545Hz，而外耳的平均ΔSPL从出生时的7.9dB下降到4个月时的3.7dB。相比之下，中耳的平均RF和ΔSPL在6个月前随年龄变化不显著。
使用SFI评估6个月及以下幼儿的外耳和中耳功能时应考虑发育特征。本研究建立的初步SFI规范数据可用于辅助评估。
