Analysis Of The Relevant Factors For Dysaudia After Microvascular Decompression For Hemifacial Spasm

Objective: To explore occurrence rates and the related factors of hearing disorders after microvascular decompression for hemifacial spasm.Methods: 205 cases were included in the First Affiliated Hospital Of Chongqing Medical University from January 2015 to January 2018 who were clearly defined with hemifacial spasm.All patients completed hearing test after operation and were assigned into hearing impairment group and non hearing impairment group,the relationship between covariates and the prevalence of postoperative hearing impairment were assessed using t-est,chi-square test and multivariate logistic regression analysis.Results: In 205 patients,24(11.7%)patients had hearing disorders.The defect of mastoid process,the physical damage of acoustic nerve and vasospasm were closely related to the hearing impairment by comparing groups(P<0.05).Multivariate logistic regression analysis showed that the defect of mastoid process(OR=5.495,95%CI=1.217 to 24.815,P=0.027)and the physical damage of acoustic nerve with vasospasm(OR=9.158,95%CI=1.219 to 68.785,P=0.031)were risk factors for hearing impairmentafter MVD.Conclusion: The occurrence of hearing impairment is significantly related to the defect of mastoid process and the physical damage of acoustic nerve with vasospasm.Avoid the defect of mastoid process and the physical damage of acoustic nerve and vasospasm can reduce the risk of hearing impairment.