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.
目的 研究学龄前儿童鼓室图测试的正常值及其影响因素。 方法 2005年1月-2005年3月，对132名（223耳）学龄前儿童（4~6岁）进行单频率单成分鼓室图测试（Y-226），获取峰值处补偿静态声导纳（Ytm）、外耳道等效容积（Vea）、鼓室测量宽度（TW）和峰值处鼓室压（TPP）等数据，对不同年龄、性别及与国外研究的结果进行比较。 结果 不同年龄间只有TW存在差别；男童Vea大于女童，其他几项指标没有性别差异；Ytm、Vea、TW、TPP与国外正常值范围相比，有统计学意义（Plt;0.05）。 结论 单频率单成分鼓室图测试结果与国外研究相比有统计学意义，提示必须建立国人自己的正常鼓室图参考值标准。
【摘要】 目的 了解慢性化脓性中耳炎患者的听力学检查特点。 方法 回顾性分析2005年8月—2008年12月间就诊的382例确诊为慢性化脓性中耳炎患者的听力学检查资料。 结果 慢性化脓性中耳炎中男性和单耳患者居多，任何年龄均可发病，以中度传导性听力损失为主，鼓室图形态各异，耳道容积变大。 结论 慢性化脓性中耳炎是常见的耳科疾病，需及时治疗，听力学检查对于指导治疗方案和评估预后意义重大。【Abstract】 Objective To learn the audiological characteristics of chronic suppurative otitis media patients. Methods We retrospectively analyzed the audiologic data of 382 patients diagnosed with chronic suppurative otitis media treated in our hospital from August 2005 to December 2008. Results The number of male chronic suppurative otitis media patients was more than female patients, and single ear infections are more than infections of both ears. The onset of the disease could be at any age. Most of the patients had a moderate conductive hearing loss. All kinds of tympanogram were found,and ear canal volume of the patients was enlarged. Conclusion Chronic suppurative otitis media is a common disease of the ear, which needs timely treatment, and audiological tests are important in guiding treatment plans and assessing prognosis.