摘要
目的探讨鼓室硬化患者的纯音听阈特点及其对听骨链状态的判断价值。方法对确诊的56耳鼓室硬化病例(其中Ⅰ型11耳,Ⅱ型21耳,Ⅲ型14耳,Ⅳ型10耳)进行纯音测听,并将测听结果与术中所见听骨链情况对比。结果 56耳气导纯音听阈35～65dB HL,I型气骨导差(ABG)20.60±6.33dB;II型ABG 35.70±8.43dB;III型ABG 41.33±8.87dB;IV型ABG 39.23±9.75dB。ABG≥30dB者51耳,<30dB者5耳;Ⅰ型之外的所有病例ABG≥30dB;34耳的听力图出现类Carchart切迹改变,其中Ⅱ型12耳,Ⅲ型14耳,Ⅳ型8耳。结论鼓室硬化导致气导纯音听阈下降,ABG可以帮助术前判断听骨链状态,ABG≥30dB提示听骨链破坏或固定。
Objective To study the tympanosclerosis audiology characteristic and evaluation of the ossicular chain by pure tone threshold determination.Methods To compare the results of pure tone audiometry and the intraoperative condition of ossicular chains in 56 cases with tympanosclerosis.There were 11 ears of typeⅠ,21 ears of typeⅡ,14 ears of type Ⅲ and 10 ears of type Ⅳ.Results The averaged air conduction threshold was 35～65 dB HL.11 ears of Type I had ABG of 2.60±6.33 dB;21 ears of Type II ABG of 35.70±8.43 dB;14 ears of Type III ABG of 41.33±8.87 dB;10 ears of Type IV ABG of 39.23±9.75 dB.51 ears had the ABG equal or greater than 30 dB,while 5 ears had ABG lesser than 30 dB.For all the other cases except TypeⅠ the ABG was equal or greater than 30 dB.Carchart-like notch changes were found in audiogram for 34 ears such as 12 ears of type Ⅱ,14 ears of type Ⅲ,8 ears of type Ⅳ.Conclusion The threshold of air conduction is elevated in tympanosclerosis,and ABG can be helpful in the estimation of ossicular chain.
出处
《听力学及言语疾病杂志》
CAS
CSCD
北大核心
2012年第1期23-25,共3页
Journal of Audiology and Speech Pathology
关键词
鼓室硬化
纯音听阈
气骨导差
听骨链
Tympanosclerosis
Pure tone threshold
ABG
Ossicular chain
