Aithal Venkatesh, Kei Joseph, Driscoll Carlie, Swanston Andrew, Murakoshi Michio, Wada Hiroshi
Audiology Department, Townsville Hospital and Health Service, Douglas, Australia; Hearing Research Unit for Children, School of Health and Rehabilitation Sciences, University of Queensland, Brisbane, Australia.
Hearing Research Unit for Children, School of Health and Rehabilitation Sciences, University of Queensland, Brisbane, Australia.
Int J Pediatr Otorhinolaryngol. 2015 Jul;79(7):1024-9. doi: 10.1016/j.ijporl.2015.04.017. Epub 2015 Apr 18.
Despite high prevalence of otitis media in Aboriginal children, the acoustic-mechanical properties of their outer and middle ear during the neonatal period remain obscured. The objective of this study was to compare the acoustic-mechanical properties of outer and middle ear using Sweep Frequency Impedance (SFI) measures between Australian Aboriginal and Caucasian neonates.
SFI data from 40 ears of 24 Aboriginal neonates (16 males, 8 females) with mean gestational age of 39.57 weeks (SD = 1.25) and 160 ears of 119 Caucasian neonates (57 males, 62 females) with mean gestational age of 39.28 weeks (SD = 1.25) serving as controls were analysed. SFI data in terms of resonance frequency (RF) and mobility of the outer and middle ear (ΔSPL) were collected from neonates who passed a test battery that included automated auditory brainstem response, distortion product otoacoustic emissions test and 1000-Hz tympanometry. SFI data were analysed using descriptive statistics and analysis of variance.
There was no significant difference in mean gestational age, age of testing and birth weight between the Aboriginal and Caucasian neonates. The mean resonance frequencies for the outer ear (mean RF1 = 264.9 Hz, SD = 58.6 Hz) and middle ear (mean RF2 = 1144 Hz, SD = 228.8 Hz) for Aboriginal neonates were significantly lower than that of Caucasian neonates (mean RF1 = 295.3 Hz, SD = 78.4 Hz and mean RF2 = 1241.8 Hz, SD = 216.6 Hz). However, no significant difference in the mobility of outer ear (ΔSPL1) and middle ear (ΔSPL2) between the two groups was found. Middle ear resonance was absent in 22.5% (9 ears) of Aboriginal ears but present in all Caucasian ears.
This study provided evidence that despite passing the test battery, Aboriginal neonates had significantly lower resonance frequencies of the outer and middle ear than Caucasian neonates. Furthermore, 22.5% of Aboriginal neonates showed no middle ear resonance, indicating the possibility of subtle middle ear issues not detected by the test battery. Reasons for the different acoustic-mechanical properties between the two ethnic groups remain unclear and require further investigation.
尽管原住民儿童中耳炎患病率很高，但其新生儿期外耳和中耳的声机械特性仍不清楚。本研究的目的是使用扫频阻抗（SFI）测量方法比较澳大利亚原住民和白种人新生儿外耳和中耳的声机械特性。
分析了24名原住民新生儿（16名男性，8名女性）40只耳朵的SFI数据，其平均胎龄为39.57周（标准差=1.25），以及119名白种人新生儿（57名男性，62名女性）160只耳朵的SFI数据作为对照，其平均胎龄为39.28周（标准差=1.25）。从通过包括自动听性脑干反应、畸变产物耳声发射测试和1000赫兹鼓室导抗测试的一组测试的新生儿中收集外耳和中耳的共振频率（RF）和声顺（ΔSPL）方面的SFI数据。使用描述性统计和方差分析对SFI数据进行分析。
原住民和白种人新生儿在平均胎龄、测试年龄和出生体重方面没有显著差异。原住民新生儿外耳（平均RF1=264.9赫兹，标准差=58.6赫兹）和中耳（平均RF2=1144赫兹，标准差=228.8赫兹）的平均共振频率显著低于白种人新生儿（平均RF1=295.3赫兹，标准差=78.4赫兹，平均RF2=1241.8赫兹，标准差=216.6赫兹）。然而，两组在外耳（ΔSPL1）和声顺（ΔSPL2）方面没有发现显著差异。22.5%（9只耳朵）的原住民耳朵中耳无共振，但所有白种人耳朵均有中耳共振。
本研究提供的证据表明，尽管通过了一组测试，但原住民新生儿外耳和中耳的共振频率显著低于白种人新生儿。此外，22.5%的原住民新生儿未显示中耳共振，这表明存在该组测试未检测到的细微中耳问题的可能性。两个种族之间声机械特性不同的原因尚不清楚，需要进一步研究。
