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1、Hearing LossHearing Loss Anatomy of EarAnatomy of EarInner Ear and acoustic transmission pathInner Ear and acoustic transmission pathClassification of Hearing Lossp Conductive typep Sensorineural typep MixedtypeDiagnostic Evaluationp Tuning fork testp Audiogram Puretones air bone SpeechImmitance Sup
2、rathreshold testp Diagnostic imagingCT scanMRI25050010002000400080000102030405060708090100110120dBHL(ANSI,1969)12512,000-10Normal HearingOOOOOO25050010002000400080000102030405060708090100110120dBHL(ANSI,1969)12512,000-10OOOOOOConductive hearing lossSensorineral Sensorineral hearing losshearing lossM
3、ixed Mixed hearing losshearing lossCauses for Conductive typep External auditory canal External auditory canalp Eardrum Eardrum（tympanic membranetympanic membrane）p Middle ear Middle earExternal Auditory Canalp Cerumen(earwax)impactionp Stenosis(narrowing)InfectionSurgerySkin disordersCongenitalTymp
4、anic Membrane(Eardrum)p Perforation(hole)p Retraction pocketp Tympanosclerosis(stiffness)Middle Earp Absence of ossiclesp Stiffness of ossicles Otosclerosis TympanosclerosispDislocation of ossicles(trauma)Cholesteatoma TumorsSensorineural Hearing LosspSensoryNoiseMedicationsInfectionHereditary/Genet
5、icPresbycusisMetabolicpNeuralTraumaDegenerationTumorsTreatmentHearing aidsMedical treatmentSurgeryHearing Aids pBTC(Behind the ear)pITE(In the ear)pITC(In the canal)pCIC(Completely in the canal)Hearing Aids pImplantableFullyPartiallypBone-conduction aidsTraditionalBAHA(bone anchored HA)SurgeryTreat
6、underlying causep Cholesteatomap TM perforationp Acoustic neuromap Encephalocelep CSF leakagep Infectious +Improve hearingp ossicular chain reconstructionp Stapedectomyp Cochlear implantp Fully implantable hearing aidsMedical Treatmentp Disease-specific treatmentInfectionsAutoimmune diseasesp Steroi
7、dsStapedectomyCochlear ImplantsSummarySummaryphow many typesphow to restore conductive hearing lossphow to improve or restore sensorineural hearing losspHApBAHApCI5.All of the following have been implicated in causing vertigo except:a.Loop diuretics b.Anticonvulsants c.Aminoglycosides d.NSAIDS e.Fluoroquinolones f.All of the aboveMany everyday medications can cause vertigo which is easily reversible if recognized.Thanks for your attention
耳鼻咽喉科學課件：7_1Hearing Loss
