Otology Flashcards
How do conductive and sensorineural hearing loss differ in terms of location?
Conductive hearing loss is caused by external or middle ear
Sensorineural hearing loss caused by inner ear
What should you inquire about in an otology history?
Otalgia Otorrhoea Hearing loss Tinnitus Vertigo
What is the most common otology test?
Pure tone audiogram
What does PTA stand for and what is it testing?
Pure Tone Average
Works out if hearing loss is conductive or sensorineural
Air or bone conduction
Can ear wax cause problems?
No
This is a common misconception.
Ear wax is normal. Basically impossible for it to block ear. Can only cause hearing loss if you push it deep into ear with cotton buds and it sticks to tympanic membrane.
what are common pathologies of the external ear?
Otitis externa (V. V. common)
Foreign body
Exostoses
What is exostoses?
bony swelling in the ear canal
Ask the patient “did you go swimming in cold water a lot as a child?
- This is the most common cause
- Will impress patients
What are the common pathologies of the middle ear?
Acute suppurative otitis media Glue ear Tympanosclerosis Perforated tympanic membrane Cholesteatoma -Retracted tympanic membrane Ossicular problems -Discontinuity or fixation
Whats the usual process of acute otitis media?
Increasing severe pain in ear
Discharge of the ear (perforation of tympanic membrane)
Resolution of the pain and healing
What causes glue ear?
Blocked eustation tube
vacuum created
Body produces fluid to rid vacuum
What is tympanosclerosis?
Bleeding between layers of tympanic membrane.
This calcifies
Benign- very common
What should you advise patients with a perforated tympanic membrane?
They may get recurrent infections
Need to keep water out of their ear
What is cholesteatoma?
Collection of skin where it shouldn’t be.
Poor gustation tube function
Vacuum in inner ear
Eardrum sucked in a bit over long period of time
Epithelial cells of ear canal migrate distally
Depression of eardrum effects the movement of cells
Dead skin builds up
Can burrow causing problems
Easy to miss so watch out for
What are the main pathologies of the inner ear?
Sensorineural hearing loss
Tinnitus
Vertigo
What pathologies are contained in Sensorineural hearing loss?
Presbyacusis Noise induced hearing loss Infections Ototoxic medications Genetics (pendred syndrome) Vestibular Schwannoma