Ear, Nose, Throat Flashcards
what is the normal first part of the hearing pathway from the external ear through the middle ear?
air conduction (AC)
how does sound waves travel in AC
through the air and transmitted from external and middle ear to the cochlea
what is the phase of hearing that is an alternative pathway that bypasses the external and middle ear?
used for testing purpose
Bone conduction
how does sound travel for bone conduction?
vibrating fork sis placed on the head, and the bone of sull is vibrated
stimulates the cohclea directing
what is the senosrineural phase of hearing?
second part of hearing pathway that involves the cochlea and cochlear branch of CN VIII
what type of conduction is more sensitve in hearing loss?
AC>BC
what type of condution is more sensitive in conductive hearing loss?
BC>AC
what questions should be asked for history of the ears?
- hearing loss
- earache/ear discharge
- tinnitus
- vertigo
what are you inspecting the auricle for?
deformities, lumps, pits, skin lesions
what test evaluates for ear pain or dischage?
Tug Test
- moves the auricle up and down and presses on tragus
- press firmly over the mastoid process behind the ear
when would you see a positive tug test?
acute otitis externa
when would you see a negative tug test
Otitis media
what diseases do you see tenderness over the mastoid process druring the tug test?
Otitis media and mastoiditis
where is the inflammation in otitis externa
the ear canal is inflamemd
see wax, pus coming from the ear