Ears Flashcards
division between external and internal ear
tympanic membrane
do you need a tympanic membrane to hear?
No, need it to amplify sound
three things that make up balance
inner ear
eyes
proprioception
three types of hearing loss
conductive
senorineural
mixed
hearing loss associated w/ age
prebycusis
what frequency do you lose first with prebycusis
high
mid
low
Medications associated with ototoxicity
gentamycin furosemid ethacrynic acid cisplatin quinidine ASA (6-8 grams)
can’t hear out of one ear and is often with disequilibrium. Schwann cells grows within finite space and progresses nerve. Can have mid-facial and corneal hypesthesia, occipital HA, ataxia
Acoustic neuroma
associated with endolymphatic hydrops. Diagnosis of exclusion
Meineres Disease
Tx for acoustic neuroma
radiotherapy
microsurgery
Vertigo, hearing loss, tinnitus (first often)
Meineres Disease
what causes meineres Dz?
malfunction of endolymph volume regulation in scala media
Disruption of basilar membrane movement
Mixing of endolymph and perilymph
Tx for meineres Dz
low salt diet
avoid caffeine
HCTZ
diazepam
vascular tumor behind eardrum
glomus jugularis
common in swimmers (cold water), not a problem until it holds onto cerumen.
Bony exostoses
if someone has acute viral hearing loss what do you do?
prednisone burst
should Rinne and Weber tests be used for general screening?
No, let elderly identify limitations
watch the tympanic membrane mobility. Screening test for middle ear dysfunction.
tympanometry
most common organism causes of otitis external
S aureus
P aerguinosa
fungus
should you flush the ear is you can’t visualize the TM?
No
what may be the only thing you need to tx Otitis externa?
Acidification
ABX used for otitis externa
ofloxacin solution (can be used w/ perf)
ciprofloxacin
ciprodex (can be used w/ perf)
tx if you suspect fungal infection with otitis externa
clotrimazole
Life-threatening extension to mastoid or temporal bone of otitis external.
Necrotizing/ malignant OE
