Characteristics of pure-tone threshold and anti-absorption rate of wide band tympanometry in patients with secretory otitis media
Objective:To analyze characteristics of pure-tone threshold and anti-absorption rate of wide band tympanometry(WBT)in patients with secretory otitis media(SOM).Methods:A retrospective analysis was performed on the clinical data of 102 patients(102 ears,SOM group)with monaural SOM and 102 healthy volunteers(control group)in the hospital between August 2022 and August 2024.The pure tone audiometry was conducted by clinical audiometer to record pure tone average(PTA)under 0.5-4.0 kHz.WBT was conducted by middle ear analysis system to record tympanic pressure,tympanic pattern,acoustic compliance value and WBT absorption rates under 0.5-4.0 kHz.Results:The tympanic patterns in control group were all normal,while most of which in SOM group were type B(86.27%).The absolute value of tympanic pressure and PTA under different frequencies in SOM group were significantly greater than those in control group,acoustic compliance value was significantly lower than that in control group(P<0.05),but there was no significant difference in external auditory canal volume between the two groups(P>0.05).There were significant differences in WBT absorption rates under different frequencies(0.5-4.0 kHz)between the two groups.At any of the same frequency,WBT absorption rate in control group was significantly higher than that in SOM group(P<0.05).Conclusion:There is certain relationship between PTA,WBT absorption rates under different frequencies and SOM onset,and detection of the above indexes can be applied in the early diagnosis of SOM.
Secretory otitis mediaAn-absorption rate of wide band tympanometryPure tone averageAcoustic compliance valueTympanic pattern
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