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目的探讨声导抗和颞骨CT在传导性聋中的诊断价值,并对鼓室成形手术中所见及术后效果进行分析。方法99耳先天性听骨链畸形和15耳外伤性听骨链异常患者术前均进行高分辨颞骨CT和声阻抗检查,通过术中所见对术前颞骨CT的诊断正确率进行评价。结果 对不同的听骨链异常进行不同术式的治疗。高分辨颞骨CT对锤骨形态异常的诊断率达100％。声阻抗对锤砧固定的诊断率达100％。外伤性听骨链脱位和先天性听骨链异常手术成功率分别达100％和70.7％。结论虽然外伤性听骨链脱位术后效果比先天性听骨链固定的术后效果好,但高分辨颞骨CT和声阻抗不能在术前显示外伤性听骨链脱位和先天性听骨链畸形的差异。
Objective To investigate the diagnostic value of acoustic and temporal bone CT in the diagnosis of conductive deafness and to analyze the findings and postoperative effects in tympanoplasty. [Methods] 99 cases of congenital ossicular chain deformity and 15 cases of traumatic ossicular chain abnormalities were examined by high resolution temporal bone CT and acoustic impedance before surgery, and the diagnostic accuracy of preoperative temporal bone CT was evaluated by intraoperative findings. The results of different ossicular chain abnormalities for different surgical treatment. High-resolution temporal bone CT diagnosis of malformations of bone shape was 100%. Acoustic impedance of the hammer anvil fixation rate of 100%. The success rates of traumatic ossicular dislocation and congenital ossicular chain abnormalities were 100% and 70.7% respectively. Conclusion Although the effect of postoperative traumatic ossicular dislocation is better than that of congenital ossicular chain fixation, high resolution temporal bone CT and acoustic impedance can not show traumatic ossicular dislocation and congenital ossicular deformity The difference.