Does bilateral otosclerosis make pre-operative bone conduction more inaccurate?  

作　　者：Fiona McClenaghan Jeremy Lavy 

机构地区：[1]The Royal National Throat Nose and Ear Hospital,330 Grays Inn Road,London,WC1X 8DA,United Kingdom

出　　处：《Journal of Otology》2021年第1期1-5,共5页中华耳科学杂志（英文版）

摘　　要：Objectives:To assess whether bilateral otosclerosis renders pre-operative bone conduction more inaccurate by increasing the Carhart effect.Methods:Retrospective review of a database of pre and post-operative audiograms of 745 ears with otosclerosis treated with stapedectomy from 2013 to 2020 in a tertiary centre.Main outcome measures:Change in bone conduction after stapedectomy for otosclerosis in:unilateral otosclerosis(U1);bilateral otosclerosis undergoing first side surgery(B1);bilateral otosclerosis undergoing second side surgery(B2).The magnitude of change in bone conduction post-operatively within and between each group.Results:The average difference in pre and post-operative bone conduction was significant within in all groups(T-stat>2 and P-value<0.05)with the greatest change observed in the U1 group.Analysis of average change in bone conduction between groups did not reach statistical significance(Pvalue=0.37).Analysis of change per frequency demonstrated the greatest change in bone conduction post-operatively at 2000 Hz in all groups.The magnitude of change at 2000 Hz was the greatest in the bilateral groups;however,it did not reach statistical significance when compared to the unilateral group(P-value=0.36).Conclusions:This is the first study in the literature to assess the accuracy of pre-operative bone conduction in bilateral versus unilateral otosclerosis.There is no evidence that pre-operative bone conduction in bilateral otosclerosis is more inaccurate than in unilateral disease.In order to assess accuracy of pre-operative bone conduction in otosclerosis a reliable method of assessing post-operative bone conduction is required,without assumption of its equivalence to cochlear reserve.

关 键 词：OTOSCLEROSIS STAPEDECTOMY Hearing loss Bone conduction 

分 类 号：R764.32[医药卫生—耳鼻咽喉科]