CT VIRTUAL ENDOSCOPY IN ASSESSING OSSICULAR CHAIN DISRUPTION CSUSED BY TEMPORAL BONE FRACTURE AND EAR TRAUMA

(整期优先)网络出版时间:2013-02-12
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ObjectiveToexplorethevalueofcomputedtomographyvirtualendoscopy(VE)inassessingossicularchaindisruptionintemporalbonefractureandeartraumawithintacttympanum.MethodsHighresolutionspiralcomputerizedtomography(CT)wascompletedin35casesoftemporalbonefractureand5casesoftympanumtrauma,allwithintactorhealedtympanum.Three-dimensionalreconstructionwascompletedus-ingavirtualendoscopysoftware.Audiologicaltestswereconductedinallpatientsandevaluationoffacialnerveinjuryinpatientswithfacialparalysis.Patientswithmildconductivedeafness,ossicularchainsublux-ationonVE,andnofacialparalysisweretreatedconservativelyfor4-12weekswithrepeatedhearingevalu-ation;thosewithfacialparalysisunderwentsurgeryifnorecoveryafter4-8weeksofconservativetreat-ment.Patientswithmoderatetosevereconductivehearinglossormixedhearingloss,incuslongprocessfractureordislocationonVEandfacialparalysis,underwentossicularchainreconstructionandfacialnervedecompressionafterconservativetreatmentfor4-8weeks,orexploratorytympanotomyonlyifnofacialpa-ralysis.VE,audiologicaltestsandfacialnervefunctiontestswererepeatedin3-6monthsaftersurgery.Re-sultsOfthe6caseswithmildconductivehearingloss,ossicularchainsubluxationandnofacialparalysis,3recoveredtonormalhearingspontaneouslyand3showednosignificantimprovement,after4-12weeksofconservativetreatment.Afterconservativetreatmentfor4-8weeks,3ofthe12caseswithmildconductivedeafness,ossicularchaindislocationonVEandfacialparalysisrecoveredtonormalhearingandHouse-Brackmann(HB)gradeIfacialfunctionfromHBgradeII,4showedfacialfunctionrecoverytoHBgradeI(n=2)orII(n=2)fromHBgradeIIIbutnohearingrecovery,and5gainednorecoveryandwentontoreceiveexploratorytympanotomyandfacialnervedecompression.The11caseswithmoderatetosevereconductivedeafness,incuslongprocessfr