Head and Neck (HEENT) Flashcards
Temporomandibular Joint
- Formed by the temporal bone and the mandible
- Responsible for opening and closing mouth
- Condylar synovial joint
- External pterygoids: open mouth
- Masseter, temporalis, internal pterygoids: close mouth (CN V)
How to Examine the TMJ
- Inspect: swelling or redness near external auditory meatus
- Palpate: fingers in front of tragus, palpate (while patient uses joint) for clicking or pain
- ROM: have patient (Open and close mouth, Jut jaw forward (protrusion and retraction), Move jaw side to side)
External ear
auricle, canal, tympanic membrane
middle ear
air-filled cavity containing the ossicles: malleus, incus, stapes
inner ear
cochlea, vestibular apparatus
physical exam of the ear
- inspection of outer ear
- palpation
- examination using otoscope
- assessment of hearing
otoscopic examination
allows direct visualization of the ear canal and the tympanic membrane
Ramsey Hunt Syndrome
Herpetic infection of the geniculate ganglion. Can also affect CN VIII, causing hearing loss.
Cauliflower ear
- Cauliflower ear (complication of hematoma auris, perichondrial hematoma, or traumatic auricular hematoma) is a condition that occurs when the external portion of the ear suffers a blow, blood clot or other collection of fluid under the perichondrium.
- This separates the cartilage from the overlying perichondrium that supplies its nutrients, causing it to die and resulting in the formation of fibrous tissue in the overlying skin.
- As a result, the outer ear becomes permanently swollen and deformed, resembling a cauliflower.
Proper exam technique
- hold the scope “upside-down”
- use other hand to distract auricle
pneumatic otoscopy
- Puff of air onto TM during examination
- Normal TM should be mobile and flutter with air puff
- Used to assess patients with possible otitis media or effusion
cerumen
earwax
serous otitis media
- allergies (ear fullness or pressure in ears are common complaints)
- you would see loss of mobility of tympanic membrane here
suppurative otitis media
- cone of light is displaced (abnormal light reflects)
- significant erythema
- cant see ossicles
tympanic perforation
opaque, no light reflects, cant see ossicles
tympanosclerosis
scar tissue along tympanic membrane
multiple infections can lead to this
kids that have had tubes usually have a little tympanosclerosis depending on how long the tubes were in
mechanics of hearing
Two separate (but connected) mechanisms (Conductive and Sensorineural)
conductive hearing
- Sound waves vibrate through the air, through the ear canal, to the tympanic membrane, vibrating the ossicles.
- Alternatively, sound waves can vibrate through bone, and directly vibrate the ossicles, bypassing the tympanic membrane.
- Conductive hearing loss: ear canal blockage, perforation of TM, or problem with the ossicles.
sensorineural hearing
- The ossicles transmit vibrations to the oval window, which in turn transmits vibrations into the cochlea, which is lined with specialized receptors. These send signals to the brain via the cochlear nerve (CN VIII).
- Sensorineural hearing loss: disruption of the neural pathway, either in the inner ear or in the brain.
Evaluation of Hearing ability
-“Gross” evaluation includes finger rub or whispered voice
Patient occludes one ear
-Examiner rubs fingers and checks distance at which patient can still hear
-Whisper a word behind patient, ask patient to repeat word
special tests for evaluating hearing loss
If you note a patient with decreased hearing acuity: Grab your tuning fork and perform the following two tests
- Rinné (compares air conduction and bone conduction)
- Weber (tests for lateralization)
Rinne Test
- Place handle of tuning fork on mastoid process. Ask patient to raise hand when she can no longer hear it. Then hold the fork close to the ear.
- In a normal ear, air conduction is greater than bone conduction (patient will hear the forks).
- In an ear with conductive hearing loss, bone conduction is greater than air conduction (patient won’t hear the forks).
- In an ear with sensorineural hearing loss, overall hearing is decreased, but air conduction is greater than bone conduction (like in a normal ear).
Weber Test
- Place the vibrating tuning fork on the top of the patient’s head.
- If sound lateralizes to the BAD ear, then conductive hearing loss is present. This is because bone conduction is still functioning normally.
- If sound lateralizes to the GOOD ear, then sensorineural hearing loss is present. The sound is not getting transmitted via the nerve to the brain in the bad ear.
inspection and palpation of the nose
- alignment
- body crepitus
- nasal tenderness
- sinus tenderness
- speculum exam