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Pathophysiology Chapter 44
Terms in this set (18)
- impacted cerumen
- otitis media
- foreign bodies
what are some common causes for conductive hearing loss?
- disorders of sound transmission from the outer or middle ear to the receptors in the middle ears
- cause by problems that impact bringing sound waves into the auditory canal
what is conductive hearing loss?
disorders of the inner ear, auditory nerve, or auditory pathways within the brain
what is sensorineural hearing loss?
- loss of hair cells form the organ of corti
- damage to CN VIII (r/t medications)
- damage of the auditory cortex of the brain within the temporal lobe (central hearing impairment)
- multiple sclerosis
what are some common causes for sensorineural hearing loss?
ringing in the ears
what is tinnitus?
- CN VIII disorders
- noise exposure
- MSG, red wine, caffeine
what can be some causes of tinnitus?
- sensation that the room is spinning
- episodes can last from minutes to hours and is associated with severe nausea and vomiting
what is vertigo?
what is the most common cause of reversible hearing loss?
what is the other name for swimmer's ear?
excess moisture in the canal provides environments for microbial growth
what is the patho for otitis externa?
usually follows an upper respiratory tract infection
what is otitis media?
- infants and toddlers r/t anatomy
- bottle fed, pacifier use, day care attendance
what are some risk factors for otitis media?
- hearing loss
- infants/toddlers: ear tugging, poor feeding, irritability
- older children/adults: rhinorrhea
what are some signs and symptoms of otitis media?
- an incase in the endolymph that fills the membranous labyrinth which results in dissension of the portion of the inner ear
- hearing loss and tinnitus can develop over time
what is meniere's disease?
what is another name for acoustic neuromas?
benign tumors that develop from the Schwann cells that surround CN VIII
what is vestibule schwannomas?
- decreased hearing
- loss of balance
what are some symptoms of vestibular schwannomas?
- age-related hearing loss r/t degenerative changes
- begin around age 50
- symptoms are gradually caused by loss of hair cells on the cochlea
what is presbycusis?
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