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纯音听力测验时骨导耳机放置部位的商榷山西医学院第二附属医院（０３０００１）李西秦，马敏，王卓玲纯音听力测验时骨导听阈的测定具有重要意义，而骨导耳机放置的部位有两外，即额部正中及同侧乳突［１，２］，但两处测得之阈值有差异。我们自ｌ９９２年２月至５月对２７例（４３耳）进行了测验，现报道如下。材料和方法一、受试对象：２７例中男１３例，女１４例。听力正常含７例（１４耳），均系２１～２３岁之青年。患者２０例（９例双耳，１１例单耳，共２耳，年龄１８～６５岁，其中传音性耳聋１５例（２１耳）：包括外伤性鼓膜穿孔（３耳），分泌性中耳炎２例（３耳），慢性化脓性中耳炎９例（１４耳），鼓室硬化症１例（１耳）。感觉神经性聋５例（８耳）。包括链霉素中毒性聋１例（２耳），老年性聋２例（４耳），原因不明２例（２耳）。二，测试方法：测听室本底噪声为２８ｄＢ患者入室后，先行气体听阈测定，然后再行骨导听阈测定。将骨导耳机置其额部正中，给欲测试之对侧耳加６０～８０ｄＢ白噪声掩蔽。从１０００Ｈｚ０ｄＢ开始，以５ｄＢ一档上升法测试，先测高频，再测低频。为避免因听觉疲劳导致之误差，让患者休息５分钟再将骨导耳机置于测试之同侧乳突区，对侧耳亦加６０～８０ｄ
Pure tone audiometry bone conduction headset placement Department of the Second Affiliated Hospital of Shanxi Medical University (030001) Li Xi Qin, Ma Min, Wang Zhuo Ling pure tone audiometry bone conduction threshold determination of great significance, and bone conduction headphones placed two parts , That is, the frontal and ipsilateral papillae [1, 2], but there are differences between the two measured thresholds. We tested 27 cases (43 ears) from February to May 1992 and are reported below. Materials and methods First, the subjects: 27 males in 13 cases, 14 females. Normal hearing with 7 cases (14 ears), are 21 to 23-year-old youth. There were 20 patients (9 ears, 11 ears, 2 ears, aged 18-65 years), including 15 cases of acoustic deafness (21 ears) including traumatic perforation (3 ears), secretory otitis media 2 (3 ears), 9 cases of chronic suppurative otitis media (1 case), 1 case of tympanosclerosis (1 case), 5 cases (8 ears) of sensory nerve deafness, including 1 case of streptomycin-induced deafness ), Senile deafness in 2 cases (4 ears), unexplained 2 cases (2 ears) .Test method: audiometry room noise floor was 28dB After the patient entered the room, the first gas hearing threshold determination, and then the bone conduction threshold measurement Put the bone conduction earphone in the middle of its forehead and add 60 ~ 80dB white noise masking to the contralateral ear to be tested.From 1000Hz0dB, test with 5dB first gear, measure high frequency first, then measure low frequency. Fatigue caused the error, let the patient rest for 5 minutes and then bone conduction headphones placed in the test of the same side of the mastoid area, the contralateral ear also plus 60 ~ 80d