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临床耳科是根据耳镜检查和声阻抗鼓室检查来判断中耳积液。但鼓膜增厚或有瘢痕时,这些检查都不能保证可靠的诊断,往往需作诊断性鼓膜穿刺,这会使鼓膜形成新的瘢痕、穿孔或听力减退。而超声鼓室检查法相当客观,无损伤,简便而节约时间。作者用苏联的一种超声波仪器作此项检查,以共振频率为10mHz的超声放大器作超声源。检查时病人侧卧,受检耳向上。外耳道内注入接触液(软蜡),发声器插入外耳道超声为脉冲式,其时程和频率显示在示波器屏幕上,共观察30人、其中10人听力正常,5人为不同类型的耳硬化症,15人为渗出性中耳炎健康
Clinical otology is based on otoscopy and acoustic impedance tympanometry to determine the middle ear effusion. However, when the tympanic membrane is thick or scarred, these tests can not guarantee a reliable diagnosis and often require diagnostic tympanic membrane puncture, which causes the eardrum to form new scars, perforation or hearing loss. The ultrasound tympanometry is quite objective, no damage, easy and save time. The author used an ultrasonic instrument from the Soviet Union to make this inspection, using an ultrasonic amplifier with a resonance frequency of 10 mHz as an ultrasonic source. When the patient is lying on the examination, the ear to be examined is upward. The external auditory meatus was infused with contact solution (soft wax). The sonicator was inserted into the external auditory meatus for pulsed ultrasound. The time course and frequency were displayed on the oscilloscope screen. A total of 30 persons were observed, of whom 10 were normal hearing, 5 were different types of otosclerosis, 15 were exudative otitis media health