The Wideband Absorbance Characteristics Of 3-7 Years Old Children With Otitis Media With Effusion

Objective: The main purpose of this study was to observe the wideband absorbance characteristics of 3-7 years old children with otitis media with effusion(OME)at ambient pressure and at top peak pressure and at the same time investigate the diagnostic value of different frequencies for OME at ambient pressure and top peak pressure.Methods: 178 children aged 3-7 years old were recruited in this study from April to October of 2018,mean age 5.32±0.94.80 subjects(136 ears)with middle ear effusion were included in the OME group,mean age,5.43±0.92.98 subjects(182 ears)with normal middle ear function were included in control group,mean age,5.25±0.96.Absorbance rate at ambient pressure and top peak pressure were extracted from the test results,and the normal group was used as the control group to observe the characteristics of the absorbance rate of children with OME at 0.226-8KHz at ambient pressure and top peak pressure.Results:(1)In OME group,the average absorbance rate at ambient is significant lower than that of TPP at 324-1681 Hz,p<0.05.(2)Absorbance rate of OME group is significantly lower than control group at ambient pressure(P<0.01)of all frequencies and the same results were seen at TPP except the frequencies from 1943 Hz to 2378 Hz.(3)The absorbance rate of OME group decrease mostly at 470-1030 Hz.The AUROC Of this frequency segment is 0.96 and 0.94 at ambient pressure and top peak pressure respectively which is the most predictive frequency in identify middle ear effusion.Single frequency points demonstrate the highest diagnose value at 650 Hz,670 Hz,690 Hz,710 Hz and 730 Hz between 470-1030 Hz.Conclusion: Wideband acoustic immittance(WAI) performs efficiently as a method to identify OME.Middle ear effusion can be quickly recognized by observing the obviously decline of absorbance rate at 470-1030 Hz.WAI is certificated an alternative reference method in assisting identifying OME.