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Conductive hearing loss in children and adults
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Definition A hearing loss due to pathology affecting the transmission of sound from the environment to the cochlea Maximum loss of 50-60 dBHL, therefore no more than mild/moderate
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Audiometric findings of low frequency conductive hearing loss
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Otoscopy and the normal tympanic membrane
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CHL in children Middle ear effusion (glue ear)incidence aetiology predisposing factors clinical findings treatment – surgical medical others
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Glue ear presentations are variable
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Grommets in treatment of glue ear
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Other causes of CHL Infections – acute otitis externa acute otitis media
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Chronic suppurative otitis externa
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Chronic suppurative otitis media
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Cholesteatoma
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Otosclerosis
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Trauma to the ossicular system and/or tympanic membrane from changes of middle ear/external canal pressure Barotrauma
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Miscellaneous Congenital abnormalities – atresia Foreign bodies/wax Benign tumours of outer/middle ear Trauma to ear
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Surgical Medical Others – hearing aids Support services Treatment
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