PD ENT Flashcards
Inspection and otoscopy of ear
External ear
External auditory canal
Tympanic membrane
Palpation of ear
External structures
Hearing tests
Whisper test
Weber test
Rinne test
What questions do we ask about difficulty of hearing?
Onset of hearing loss
Unilateral or bilateral
What factors could contribute to hearing loss?
Medications (aminoglycosides)
Trauma
Vertigo
Family Hx of hearing loss
Inspection of external ear
Mastoid process Auricle Tragus Scaphoid fossa Helix Antihelix Lobule Auditory canal Meatus
Assessment of ears
Position
Shape
Color
Lesions
Position of ears
Down syndrome
Outstanding ears
Shape of ears
Microtia Creased lobule Elongation Replcaition of lobes Gouty tophus Cauliflower ear Darwin's tubercle
Color of ears
Inflammation
Infection
Hemangiomas
Lesions of ears
Scars Hematomas Dermatitis Trauma Infectious processes
Area surrounding the ears
Always look behind patient's pinna Battle sign Preauricular pits Erythema Edema
Hair distribution in ears
Hairy tragus
Hairy pinna
Microtia
Gross hypoplasia of the pinna Blind or absent auditory canal Bilateral Could have completely formed and functioning cochlea Helped with hearing aides and surgery
Preauricular pits
Autosomal dominant, unilateral 75%
Can become infected
Surgical excision if repeated infections
Outstanding ears
Angle between auricle and side of head is greater than normal
Not pathologic
Easily surgically corrected
Darwin’s tubercle
Small cartilaginous protuberance, most commonly along concave edge of posterosuperior helix
Normal variation
Gouty tophi
Deposits of uric acid crystals
Hairy tragus/pinna
Most common in men, occurs with aging
Common in people of Indian descent
Creased lobe
May be associated with increased risk for CAD
Hematomas
Cause
Sequela
Accumulation of blood between skin and cartilage
Blunt trauma most common cause
Inspect for trauma and check hearing
Cauliflower ear is late sequela
Cauliflower ear
Cause
Caused by repeated trauma to auricle
Subperichondrial separation with focal generation of fibrous tissue and scar formation
Potential hearing loss, can be surgically corrected
Keloid
Abnormal wound healing
Excessive bulk produced at site of cutaneous injury (highly compacted bundles of hyalinized collagen)
Common in AA, and older than 20
Battle sign
Hematoma behind the ear
Indication of base of skull fracture
Palpation
Nodules Swelling Tenderness Warmth Assessment of lesions
Otoscopy
Visualize auditory canal and TM
Otoscopy in adults versus children
Adults: pinna upward and outward
Children: pinna down and back
What does straightening of the canal allow for?
Better visualization of the tympanic membrane
Where does the auditory canal start and end?
External auditory meatus and medially TM
What joint makes up part of the posterior external auditory canal wall?
TMJ
Skin adheres to periosteum along the … and to cartilage and soft tissue along the …
Inner 2/3, outer 1/3
Skin of the outer 1/3 contains what structures?
Hairs and glands that secrete cerumen
Where is cerumen not produced?
Middle or inner canal
What is the average length of the auditory canal?
3.7 cm
Innervation of auditory canal
CN V, VII, X
What does the stimulation of a small branch of the vagus nerve (Arnold’s nerve) do to the patient?
Cough during exam
What is the blood supply to the auditory canal?
Branches of auricle temporal branch of the inferior maxillary artery
The canal … from the pinna to the TM
Conducts sound waves
Cerumen impaction
Painful depending on extent of cerumen
Conductive hearing loss
Common in elderly and children
Tx for cerumen impaction
Debrox drops, irrigation, curette/otoloop
Otitis externa
Swimmer's ear, common in summer Painful infection of skin Swelling erythema or canal Pinna edematous and red Narrowed lumen with purulent drainage
Bacterial causes of otitis externa
Pseudomonas, Staph aureus
Tx of otitis externa
Otic drops, oral abx
Common foreign body in the ear
Q tip, beans, peas, jewelry
Common in kids and psych
Result from foreign body
Complete conductive hearing loss
Caution with foreign body
Don’t irrigate if organic material suspected or insects
Carefl not to cause TM perforation
Exostosis
Small boney growths of canal
Benign
Multiple and bilateral
Aris more commonly near TM
Exostosis Tx
Usually no tx necessary unless recurrent cerumen impactions
Cholesteatoma
Overgrowth of epidermal tissue, usually in pts with hx of chronic otitis media
Canal or middle ear
Painful, erode into bone
Conductive or sensorineural hearing loss
Middle ear
Small air filled cavity within temporal bone
Lined with squamous epithelium
Boundaries of middle ear
TM oval window and round window
What is the opening in the posterior wall in the middle ear?
Opening to mastoid sinus
Where does infection of epithelial lining of the middle ear come from?
Nasopharynx via the eustacian tube
What structure transmits sound waves through the middle ear?
TM vibrates, transmitting sound waves from the canal into mechanical motion, setting the ossicles into motion
Ossicles
Malleus, incus, stapes
Augment vibrations and distribute mechanical energy to cochlea
Eustachain tube
Connects middle ear to posterior portion of nasopharynx
Neutralizes internal and external air pressures
Why do children have more otitis media infections?
Eustachian tube is much smaller and more horizontal, so pathogens are more easily introduced to the middle ear
Otitis media
Hx of recent URI
Bacterial or viral
More common in infants and children
Unilateral
Complications of otitis media
Mastoiditis Meningitits Osteomyelitis Sigmoid sinus thrombosis Facial nerve involvement
Common pathogens causing otitis media
Strep pneumoniae
Haemophilus influenzae
M. cattarhalis
S&S of otitis media
Pain Fever Erythematous, building TM Decreased TM mobility TM may rupture and cause purulent drainage in external auditory canal Decreased hearing Effusion behind TM
Serous otitis media
Pts
Can procede AOM
May be due to poor Eustachian tube function
May be concurrent with URI
Common in people with allergies
Look for fluid, bubbles behind TM, TM not inflamed
Bullous myringitits
Otalgia
Erythematous TM
Blisters
Accompanies URI symptoms
Pathogens of bullous myringitits
Mycoplasma pneumoniae
Virus
Cause of TM perforations
Trauma
Infection
Barotrauma (divers, airplane)
Results of TM perforation
Conductive hearing loss
Increased risk of infection
Cuase of TM scarring
Previous infections
Trauma
Perforations
Results of TM scarring
Decreased hearing over time due to decreased mobility of TM
Otosclerosis
Progressive hearing loss
Due to deposition of bone in cochlea/stapes foot
S&S of otosclerosis
No pain
Tinnitus
Normal TM
Patent Eustachian tube
Common in females, 30-40, familial tendency
Tx otosclerosis
Stapedectomy
Hemotympanum
blood in middle ear behind TM
Result of head trauma or severe barotrauma
Could be painful
Tx hemotympanum
Spontaneous resolution over several weeks is normal
Result of hemotympanum
Could result in conductive hearing loss
Pneumatic otoscopy
Done if loss of mobility of TM is suspected
Puff of air from otoscope gulf creates a positive pressure, and the TM should move inward, then return to normal position quickly
No movement or decreased movement during pneumatic otoscopy
Increased pressure within middle ear is suspected
Cause of no movement
Porr functioning Eustachian tube
Fluid within middle ear
Is pneumatic otoscopy part of the normal physical exam?
No
What are the three hearing tests?
Whisper
Rinne
Weber
Whisper test
Occlude opposite ear, stand behind patient and whisper words for patient to repeat, or ask a simple question and ask for an answer
Patient should be able to hear your whisper from 1-2 feet away from their ear
What does the whisper test test?
Grossly defines hearing