ENT Flashcards
What are the otolith organs?
Utricle and saccule and semi-circular canals
What do the otoconia contain?
Ca carbonate crystals
What stimulates the vetibulo-occular reflex?
Semi-circular canals
What is contained within the cochlea?
- Scala media (endolymph)
- Scala tympani and Scala vestibuli (perilymph)
What direction do they sterocilia bend to initiate depolarisation?
Towards the longest
What do the utricle & saccule detect?
Linear acceleration
What is contained with the SSC?
- Cupula in the ampulla
- Deflection by movement of perilymph
What is the function of the outer and inner hair cells in the Organ of Corti?
Outer: modulate sound
Inner: receive sound and send info back to brain
Presentation of Squamous Papilloma?
-2 peaks of incidence
HPV type in SCC?
16
Salivary gland: acute bilateral symptoms
Mumps
Salivary gland: acute unilateral
Oral infection
Salivary gland: recurrent unilateral symptoms, pain and swelling, worse on eating
Sialolithiasis (stones)
Bacterial causes of Otitis Externa?
Staphylococcus aureus
Proteus spp
Pseudomonas aeruginosa
Fungal causes of Otitis Externa?
Aspergillus niger
Candida albicans
Herpetic whitlow?
Herpes simplex virus of the finger
What is the main difference between Vestibular Neuronitis and Labyrinthitis?
Larbrinitis has associated tinnitus and hearing loss
Management of Meniere’s?
Salt restriction and Beta-histine
What is the most common auditory symptom
in Migrainous Vertigo?
Phonophobia
“Aural fullness”
Meniere’s
“Tear drop” sign on CT
- Orbital floor fracture
- “Blow out” fracture of medial wall and floor
Imaging of choice in trauma to look at the sinuses?
CT
Imaging of choice to look at the auditory meatus and nerves?
MRI
Centor Criteria
History of fever
Tonsillar exudates
Tender anterior cervical adenopathy
Absence of cough (cough is viral rather than bacterial)