资源描述：
《临床听力概述（Overview of clinical hearing）.doc》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、临床听力概述(Overviewofclinicalhearing)ThispostismainlyaboutIstartedthisprojectfromcochlearfor08years,10yearstostudyinChineseUniversityHongKongotologyaudiology,theexperienceintodailyclinicalwork,emphasisonclinicalaudiology,wehopetohelp.Thetextmayberough,mainlychatting,notacademic
2、papers,andaskingforforgiveness!Inaddition,someoftheknowledgeismemory,andnofurtheraccesstoteachingmaterials,soitmaybewrong,pleasecriticizeandcorrect・OneOverviewofclinicalhearingAsanotolaryngologydoctor,alotofpeoplethinkistheentryofeartounderstand,adissectiondifficult,twohear
3、ingdifficult,threedoctor,fourentrydifficultoperation.Ifyouwanttolearn,youmustcontactmorepatients,moreontheproblemofteachingmaterials・Inclinicalwork,themostimportantofthehearingexaminationIthinkaudiometry(puretoneaudiometry,PTA),inHongkong,theymostoftendolisteningtestisPTA,A
4、BR,rarelydoelectrophysiologyaudiometry.Ithinkthemainreasonis:PTAcoversallthecommonlyusedfrequencyof250Hzto8000Hz,andthecorrespondingthresholddeterminationforeachfrequency,canwellreflectthesituationofahearingimpairedhearing.SoPTAisthemostdirect,economicalandeffectivehearingt
5、est・HowtoreadPTA?Thereareafewkeypoints:1,airconduction(AC)thresholdisalwayshigherthantheboneconductionthreshold(BC)・2,tojudgeconductivedeafness(ACabnormalities,BCnormal),sensorineuraldeafness(AC,BCtogether),mixeddeafness(ACandBCareabnormal,butthereisairboneconductiondiffere
6、nce(ABG))・3,thehighestboneconductionstimulionly60~65dB,sotheboneconductionthresholdto60~65dBwillnotgoup.4,thedecisionthresholdiscommonlyusedinclinical500,2000Hz1000,theaveragehearingthreshold,Hongkongonly500and1000,theconventional20004000Hz,iftheairconductionthreshold,norma
7、l(lessthan20dB)willnothavemeasuredtheboneconduction.5,presbycusis,induceddeafness(cochlea)oftensee4000Hzthresholddecreased・6,WhenABGisgreaterthan50dB,andthetympanicmembraneisintact,itisnecessarytoconsidertheinterruptionofossicularchaincontinuityorrarediseasessuchasearsclero
8、sisandstapesfixation.Thecharacteristicsofhearing7,Meniere'sdiseaseisthechangeoflow
