低频传导性听力损失的诊断研究

目的研究低频传导性听力损失与中耳共振频率的相关性.方法纳入84例参与者,测量其共振频率,并用金标准测试.用ROC曲线测试诊断低频传导性听力损失的最佳分界点,用Levene's测试低频传导性听力损失组与听力正常组间共振频率的差异.结果传导性听力损失和听力正常组的共振频率来自不同的总体.理想的分界点为850 Hz和1 050 Hz.共振频率在850 Hz～1 050 Hz之间认为是正常的.当共振频率小于850 Hz时,检验出传导性听力损失的效能较高,当共振频率大于1 050 Hz时,检验出传导性听力损失的效能较低.结论当共振频率小于850 Hz时,可以推断有传导性听力损失;当共振频率大于1 050 Hz时,检验效能较低.这可能与共振频率受多因素影响有关.当共振频率高于1 050 Hz时,耳鼻咽喉科医师和听力学家在解释共振频率的结果时必须慎重.

Study of Resonant Frequency in Diagnosing of Low Frequency Conductive Hearing Loss

Objective To investigate the relationship of resonant frequency and low frequency conductive hearing loss. Methods Eighty- four participants were included, and tested by gold standard and resonant frequency respectively. Receiver operator characteristic (ROC) curve was used to explore the most appropriate cutoff point for diagnosing low frequency conductive hearing loss and Levene's test was used to test the difference of the low frequency conductive hearing loss and normal hearing groups. Results The resonant frequencies of low conductive frequency hearing loss and normal hearing groups were different. The optimum cutoff points of resonant frequency were 850Hz and 1 050Hz. The resonant frequency range from 850Hz to 1 050Hz was considered normal. The test was powerful when the resonant frequency was lower than 850Hz. The test was powerless when the resonant frequency was higher than 1 050Hz. Conclusions Conductive hearing loss could be predicted from resonant frequency when it is lower than 850Hz. The test is powerless when the resonant frequency is higher than 1 050Hz. The resonant frequency could be affected by many factors, so ENT (ear, nose and throat) doctors and audiologists have to be careful about how to explain the results when the resonant frequency is higher than 1 050Hz.