پاورپوینت کاهش شنوایی انتقالی (pptx) 23 اسلاید

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کاهش شنوایی انتقالی(Conductive Hearing Loss) به نام خداوند شنوا A 8 yr/old girl with strabismus+CHL! Hearing Loss Characterized broadly by degree, configuration and type Degree: amount of hearing loss in relationship to normal auditory function Configuration: overall ‘shape’ or pattern of the hearing loss as displayed on the conventional audiogram in dB HL as a function of frequency Type: site (location) of the auditory disorder Types of Hearing Loss:Conductive(CHL) Reduction of air-conductive sound delivered to the normal cochlea during transmission through a disordered outer ear and/or middle ear Sound reaching cochlea attenuated to some degree (in OME or debris ~25 dB HL; in complete atresia, maximally ~60 dB HL) Excellent speech perception when incoming acoustic signal is sufficiently intense The EAR Upper Aero-Digestive Tract EAC Foreign Body…. Ergent or Emergent Otitis Extern…. Malignant Otitis Extern Atresioplasty Exostosis & Medial Canal Fibrosis Malignancies:… Temporal Bone Resection Exostosis & MCF Cong. Aural Atresia ME SOM & CSOM COM Otosclerosis Oscicular disruption Neoplasms….. Glomus tumors …. Facial Nerve Tumors