摘要
Abstract
Objectives:To analyze changes of bone conduction threshold ( BC) , and it's impact factors before and after open modified radical mastoidectomy surgery.Methods:Collected 82 COM patients'(92 ears) basic information, BC (500Hz, 1000Hz, 2000Hz, 4000Hz) value before and after operation, and the diagnosis, the operation modes, the lesion severity of COM, and so on.We used the paired T-test, variance analysis , and covariance analysis to analyze the change trend and the impact factors of BC .Results:After surger-y, the BCs at all frequency increased (P<0.001), and BCs at high frequency (2000Hz, 4000Hz) increased more than 5 dB.The pa-tients who diagnosed as cholesteatoma , or implemented tympanic cavity forming operations , had more BCs increasing at high frequency .. Conclusion:tympanoplasty can lead to bone conduction hearing loss at high frequency .Through ABGs at low or medium frequency to eval-uating the degree of hearing improvement on patients after tympanoplasty are much more objective .关键词
慢性中耳炎/骨导听阈/影响因素/改良乳突根治术Key words
Chronic otitis media/Bone conduction threshold/Impact factors分类
医药卫生
