听骨链和耳蜗的应用解剖学分析

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1、汪昌学听骨链和耳蜗的应用解剖学研究汕头大学医学院硕士研究生论文ABSTRACTBackgroundOssicularchainislocatedintympaniccavity,composingbymalleus,incusandstapes.Manyreasonscontributetothedestructionofossicularchain,resultinginconductiondeafness.Reconstructionofossicularchainistheeffectivemethodtohealtheconductiondeafness.Th

2、edatesaboutreconstructionofossicularchainareabundant，therapeuticeffectisstable，buttherateofexodusandineffectivearethematter.Datesaboutossicularchainarecenteredinthestapes，othersareseldom.Datesontheanatomyofossicularchainareimportanttotheachievementratioofoperation，decreasetherateofexodu

3、s，resultingintheelevationofaudibilitythreshold.Cochleagettingitsnamebecauseoftheshapetoresemblevolute,isaprojectinginananteriordirectionoffromthevestibule.Cochleaiscomposedofmodiolusandcochearspiralcanal.Osseousspirallaminaaroundmodiolus，dividethecochearspiralcanalintoscalavestibule,sca

4、latympani,andcochlearduct.Thescalavestibuleandscalatympanicommunicatewitheachotherthroughhelicotrema.Cochlearductoccupyingthemiddlepartofthecochlearcanalbetweenthescalavestibuleandthescalatympani,isaspiralblindtubefixedfirmlytotheinternalandexternalwallsofthecochlearcanalofthebonylabyri

5、nth.Thespinalorgan,thereceptorofauditorystimuli,issituatedonthebasilarmembraneofthecochlearduct.Artificialcochleaisaauditoryprosthesistostimulatethecochlearfunctionusedtocuretheextremelyheavilyneurosensorydeafness，containingtwoparts，languagetreaterandimplantbutton.Thekeytechniqueisdrill

6、ingholetoimplanttheelectrodeintoSVorST.Theproceduresarefollows:1.Rubbingabonybedaboveacousticducttoplacethevoicereceiverandstimulator.2.Theclassicmastoidprocessapproach:contouringthecircumscription,entertympaniccavitythroughfacialrecess,wearingoutthebonebeforeanteriormaginofcochlearwind

7、owtoexposetheSTandinserttheelectrodeintoSTorinserttheelectrodethroughsecondarytympanicmembrane.3.Middlecranialfossaapproach:openingawindowontemporalsquama,draftthebrain，IV汪昌学听骨链和耳蜗的应用解剖学研究汕头大学医学院硕士研究生论文dissociatethecerebralduramater,exposetheundersurfaceofmiddlecranialfossa.Rub