Audiological Characteristics in Different Types of Ossicular Chain Lesions and Postoperative Hearing Outcomes
WANG Yu
LUO Huiwen
LU Zhaoyi
PAN Tao
Abstract：Objective To report pure tone audiometry characteristics in different types of ossicular chain lesions,and long-term hearing outcomes after ossicular chain reconstruction.Methods Patients who underwent tympanoplasty and ossicular chain reconstruction in our department from 2013 to 2017(n=92,93 ears)were grouped according to the type of ossicular chain lesions found during the operation,i.e.ossicular chain discontinuity(group A),ossicular chain fixation(group BC),and entrapment of continuous ossicular chain(group D).Pre-and post-operative PTA and ABG were compared among the 3 groups.Results Patients were follow-up for more than 6 months.The preoperative PTA,ABG and thresholds of each frequency were significantly different between 3 groups.In group D,air conduction thresholds showed mainly low frequency damaged preoperative and normal bone conduction thresholds,compared to flat air conduction thresholds decline and significant middle and high frequency bone conduction decline in groups A and BC.Postoperative PTA and ABG significantly improved in all three groups(P<0.05),especially in group BC,with low-frequency hearing thresholds essentially restored to within normal in group D.Conclusion When ossicular chain fixation and discontinuity coexist,hearing loss is mainly caused by fixation,causing the most severe hearing loss with the largest ABG,whereas entrapment of a continuous ossicular chain causes the least severe hearing loss.Ossicular chain reconstruction can effectively improve hearing,with patients with fixed ossicular chain showing the best improvement.
Keywords：ossicular chainossicular chain reconstructionpure tone audiometrypure Tone Average(PTA)air bone gap(ABG)
Publication Date：2024-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 930-935 )