Wide band typanometry energy reflectance in Chinese infants and children with normal outer and middle ears
10.3760/cma.j.issn.1673-0860.2014.06.001
- VernacularTitle:外中耳正常汉族婴幼儿宽频声导抗能量反射值的观察
- Author:
Yibo LEI
1
;
Wei LU
;
Lingyan MO
Author Information
1. 450052,郑州大学第一附属医院耳科
- Keywords:
Infant;
Acoustic impedance tests
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2014;49(6):441-445
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the law of wide band typanometry energy reflectance (WBTER) in Chinese infants of Han nationality with normal outer and middle ears,and to provide the normal values for the clinical application of WBTER.Methods Ninety four infants (170 ears) of Han nationality with normal outer and middle ears evidenced by temporal bone CT,and 226 Hz and 1 000 Hz tympanometry at the ages between three and 48 months (median age:14 months) were selected and divided into four groups:3-6 months(32 ears),7-12 months(53 ears),13-24 months(46 ears) and 25-48 months(39 ears).WBTER was conducted on these infants,and the basic law of energy reflectance under different frequencies,as well as the influence of age on energy reflectance were analyzed using SPSS 15.0.Results The normal value of energy reflectance was higher at low frequency,gradually decreased with the increase of frequency,reached the minimum near 4 000Hz,followed by constantly increased till 8 000Hz.In the scope of frequency below 1 000Hz and above 6 350 Hz,the energy reflectance values of infants in the group of 3-6 months were significantly lower than those of infants in other age groups (P ＜ 0.05).In comparison to the group below six months,the groups over six months generally had higher energy reflectance and lower fluctuation.Conclusions The pattern of energy reflectance across frequency range for Chinese infants and children was consistent with that of other races reported in foreign countries.The WBTER changes with the growing of age,which tends to be stable after the first six months of birth.
