ent hape Flashcards
what is a point to remember during your ear exam?
The inner two-thirds of the canal are surrounded by bone and lined by thin, hairless skin. Pressure on this inner two-thirds of the canal area causes pain
what does the middle ear connect to?
the nasopharynx via the proximal end of the eustachian tube.
describe the aspects of the vestibulocochlear nerve
The cochlea is dedicated to hearing, whereas the semicircular canals and otolith organs are dedicated to balance
how do you assess the middle and inner ear?
Much of the middle ear and all of the inner ear are inaccessible to direct examination. Assess their condition by testing auditory function.
what do hearing disorders of the external and middle ear cause?
conductive hearing loss
otitis externa
infection of the external ear
exostosis
benign bony growth in external ear
examples of middle ear disorders
otitis media, congenital conditions, cholesteatomas, otosclerosis, tympanosclerosis, tumors, and perforations of the tympanic membrane.
what kind of hearing loss is caused by disorders of the inner ear?
sensorineural hearing loss
examples of disorders of the inner ear
congenital and hereditary conditions, presbycusis, viral infections such as rubella or cytomegalovirus, Ménière disease, noise exposure, ototoxic drug exposure, and acoustic neuromas
air conduction is more sensitive than bone conduction (AC > BC) in those with…
normal hearing
function of semicircular canals vs otolith organs
The three semicircular canals in the inner ear sense rotational movement, whereas the otolith organs sense linear movement.
what sinuses are readily accessible on the physical exam?
frontal and maxillary sinuses
common or concerning symptoms on the ear exam
Hearing loss
Earache and ear discharge
Ringing in the ears (tinnitus)
Dizziness and vertigo
Nasal discharge (rhinorrhea) and nasal congestion Nosebleed (epistaxis)
conductive vs sensorineural hearing loss
-conductive loss, which results from problems in the external or middle ear
-sensorineural loss, resulting from problems in the inner ear, the cochlear nerve, or its central connections in the brain
what do ppl w sensorineural hearing loss have issues with?
understanding speech, often complaining that others mumble; noisy environments make hearing worse
in conductive hearing loss what kind of environments may help?
noisy environments
medications known to cause permanent hearing loss
aminoglycosides (e.g., gentamicin) and many chemotherapeutic agents (e.g., cisplatin and carboplatin)
medications that can cause temporary hearing damage
aspirin, nonsteroidal anti-inflammatory agents (NSAIDs), quinine, and loop diuretics (e.g., furosemide).
what do acute otitis externa and acute or chronic otitis media with perforation usually present with?
yellow green discharge
what should you suspect with tinnitus associated with fluctuating hearing loss and vertigo
meniere disease
vertigo
the sensation of true rotational movement of the patient or the surroundings
possible causes of rhinorrhea
Causes include viral infections, allergic rhinitis (“hay fever”), and vasomotor rhinitis. Itching favors an allergic cause.
what suggests allergic rhinitis?
seasonal onset or environmental triggers
what causes drug induced rhinitis?
excessive use of topical decongestants or intranasal use of cocaine.
Acute bacterial sinusitis (rhinosinusitis)
unlikely until viral URI symptoms persist more than 7 days; both purulent drainage and facial pain should be present for diagnosis (sensitivity and specificity are above 50%)
Ask about drugs that may induce nasal stuffiness.
Inquire about all medications or drugs, particularly oral contraceptives, alcohol, and cocaine.
Is the nasal congestion only on one side?
Consider a deviated nasal septum, nasal polyp, foreign body, granulomatous disease, or carcinoma.