ENT Flashcards
Where is the problem is conductive hearing loss?
due to external / middle ear
Where is the problem is sensorineural hearing loss?
due to inner ear / CNVIII
Signs of CHL compared to normal on rinnes test?
Normal = air conduction > bone conduction
CHL = bone conduction > air conduction
Signs of CHL and SNHL compared to normal on weber test?
Normal =equal
CHL = lateralises to affected ear
SNHL = sound louder in normal ear
Common organisms of Acute Otitis Media and how does it happen?
URTI migrates to middle ear via eustachian tube
common organisms : strep pneumoniae and h.influenzae
When should Abx be given in Acute Otitis Media and what is given?
Symptoms for more than 4 days, under 2 years old, systemically unwell or perforation
Amoxicillin for 5-7 days
Acute Otitis Media
Common complications?
hearing loss
mastoiditis
CHOLESTEATOMA
symptoms?
foul smelling brown discharge
hearing loss
CHOLESTEATOMA
signs on otoscopy?
Otoscopy
‘attic crust’ - seen in the uppermost part of the ear drum
CHOLESTEATOMA
What congenital abnormality increases the risk?
Cleft palate increases the risk by 100 fold
CHOLESTEATOMA
What is it?
Growth of keratinising squamous epithelial cells trapped in skull base causing localised destruction
Otitis Externa
What is it commonly known as?
Symptoms?
Swimmers ear
SWIM DIP
Discharge
Itch
Pain
Otitis Externa
Common causing bacteria?
pseudomonas aeruginosa
staph aureus
Otitis Externa
Treatment?
topical antibiotic or a combined topical antibiotic with a steroid
if a pt fails to respond to tx refer to ENT
BPPV
Features?
vertigo triggered by change in head position associated with nausea lasting 10-20 seconds
BPPV
Cause?
canaliths (crystals) in semi-circular canals
BPPV
What test is a positive sign?
Hallpike manoeuvre
causes rotatory nystagmus
Symptomatic relief of BPPV?
Epley manoeuvre (successful in around 80% of cases)
Meniere’s Disease
features including Triad?
how long do episodes last and how long may someone have symptoms for?
Vertigo
Tinnitus
Sensorineural hearing loss
+ sensation of fullness in the ear
episodes lasting minutes to hours
resolve after 5-10 years
What causes Meniere’s Disease
Excessive pressure and progressive dilation of the endolymphatic system
What is Vestibular Neuronitis
cause of vertigo that often develops following a viral infection.
Features of Vestibular Neuronitis?
vertigo lasting hours - days
nausea and vomiting may be present
horizontal nystagmus is usually present
no hearing loss or tinnitus
Management of Vestibular neuronitis?
1st - vestibular rehabilitation exercises
2nd - a short oral course of prochlorperazine
Most common type of head and neck cancer?
Squamous cell carcinomas