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在耳硬化病灶累及镫骨的颞骨切片中,组织学已充分证明病灶大多延至耳蜗骨壁。但这类病人的骨导阈值升高究竟是否由于耳蜗病灶所致,一直争论颇多。在考虑上述问题时,至关重要的是传导性聋患者的骨导听阈并不如实地代表内耳功能。Carhart氏最先发现在耳硬化症手术成功后,其骨导比术前分别平均提高;500Hz为5dB,1000Hz为10dB,2000Hz为15dB及4000Hz为5dB,说明骨导下降系人为因素所致。上述效
In otolaryngology lesions involving the stapes of temporal bone slices, histology has been fully proved most of the lesions are extended to the cochlear wall. However, such patients with bone conduction threshold whether increased due to cochlear lesions, has been a lot of controversy. In considering these issues, it is of the utmost importance that the bone conduction threshold of conductive deaf patients does not faithfully represent the inner ear function. Carhart’s first found that in the otosclerosis surgery is successful, the average increase of the bone conduction than before surgery; 500Hz to 5dB, 1000Hz to 10dB, 2000Hz to 15dB and 4000Hz to 5dB, indicating that the decline of bone conduction due to human factors. The above effect