A preliminary study on the characteristics of tympanic membrane absorption rate in children with congenital middle ear malformation
10.16066/j.1672-7002.2025.01.004
- VernacularTitle:先天性中耳畸形患儿鼓膜吸收率特征初探
- Author:
Lijie SUN
1
;
Yuanyuan LI
;
Wendi SHI
;
Qing ZHANG
;
Yang LI
;
Yihui YANG
;
Ming TANG
Author Information
1. 宁波大学附属妇女儿童医院耳鼻咽喉头颈外科,浙江 宁波 315000
- Keywords:
Congenital Abnormalities;
Ear,Middle;
Hearing Tests;
Tympanic Membrane;
middle ear malformations;
wideband acoustic immittance;
tympanic membrane absorbance
- From:
Chinese Archives of Otolaryngology-Head and Neck Surgery
2025;32(1):17-21
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE To analyze the peak wideband acoustic immittance(WAI)values reflecting the tympanic membrane absorption characteristics during the measurement process in patients with congenital middle ear malformation.METHODS We selected 36 patients diagnosed with congenital middle ear malformation by CT as subjects and evaluated their tympanic membrane absorption characteristics by measuring their acoustic impedance peak pressure.Then,we divided these data into two groups based on the pathological malformation obseved during the surgical process,namely the auditory ossicular chain soft connection group and the auditory ossicular chain fixation group.Calculate the absorption rate values of the tympanic membrane at each frequency corresponding to the peak pressure value of the tympanogram,and the relative area of absorption rate.By conducting independent t-tests,we compared two groups-normal children and patients who had undergone ossicular chain fixation surgery-to analyze the absorption area and peak absorption rate of their tympanic peak pressure values.RESULTS Under peak pressure,there were significant differences(P<0.001)in the full frequency range tympanic membrane absorption rate and peak absorption rate between the group with fixed ossicular chain and the normal group.However,there was no difference in the full frequency range tympanic membrane absorption rate and peak absorption rate between the group with soft ossicular chain and the normal group.Under peak pressure,the absorption area of the ossicular chain fixation group was significantly lower than that of the normal group in the low frequency range of 226-1 000 Hz(P<0.001),while the absorption area of the ossicular chain soft connection group was significantly higher than that of the normal group in the low frequency range of 226-1 000 Hz(P<0.001).CONCLUSION When conducting broadband acoustic impedance test,there is a significant difference in the relative area of tympanic membrane absorption rate of acoustic impedance peak pressure between the auditory ossicular chain soft connection group and the auditory ossicular chain fixation group across 226-1 000 Hz.It has application value as a clinical rapid screening and diagnostic tool for middle ear malformations.
