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 研究學齡前兒童鼓室圖測試的正常值及其影響因素。 方法 2005年1月-2005年3月，對132名（223耳）學齡前兒童（4~6歲）進行單頻率單成分鼓室圖測試（Y-226），獲取峰值處補償靜態聲導納（Ytm）、外耳道等效容積（Vea）、鼓室測量寬度（TW）和峰值處鼓室壓（TPP）等數據，對不同年齡、性別及與國外研究的結果進行比較。 結果 不同年齡間只有TW存在差別；男童Vea大于女童，其他幾項指標沒有性別差異；Ytm、Vea、TW、TPP與國外正常值范圍相比，有統計學意義（Plt;0.05）。 結論 單頻率單成分鼓室圖測試結果與國外研究相比有統計學意義，提示必須建立國人自己的正常鼓室圖參考值標準。
【摘要】 目的 了解慢性化膿性中耳炎患者的聽力學檢查特點。 方法 回顧性分析2005年8月—2008年12月間就診的382例確診為慢性化膿性中耳炎患者的聽力學檢查資料。 結果 慢性化膿性中耳炎中男性和單耳患者居多，任何年齡均可發病，以中度傳導性聽力損失為主，鼓室圖形態各異，耳道容積變大。 結論 慢性化膿性中耳炎是常見的耳科疾病，需及時治療，聽力學檢查對于指導治療方案和評估預后意義重大。【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.