3 - ENT - Otology - Sensorineural deafness - Noise induced, Barotrauma + Perilymph fistula, Trauma, Ototoxicity, Herpes Zoster Oticus

Question 1

apart from the above mentioned in the title, what can also cause sensorineural deafness..?

Answer 1

menieres

Question 2

Noise induced hearing loss - how? loss at what Hz?

Answer 2

sudden or prolonged exposure

typically loss at 4-6Hz

Question 3

Barotrauma - what happens

Answer 3

sudden pressure change may cause damage to inner ear membranes

Question 4

What does barotrauma lead to?

Answer 4

barotrauma leads to leakage of perilymph into middle ear

Question 5

How does barotrauma present?

Answer 5

sudden hearing loss, vertigo, tinnitus

Question 6

Trauma - which fractures hold greater risk? risk of what?

Answer 6

transverse fractures ( 20% of temporal fractures) hold greater risk of inner ear and facial nerve damage

Question 7

Ototoxicity - from what?

Answer 7

gentamicin

aminogylcosides, metronidazole, diuretics, aspirin, cytotxics, sedatives, antidepressants

Question 8

Ototoxicity - what is vital and why? how to do this?

Answer 8

prevention - usually irreversible

pre-asses renal funciton, serum level monitoring, use non-ototoxic agents if possible

Question 9

Herpes zoster oticus - syndrome name? what does virus attack? mgmt?

Answer 9

ramsay hunt syndrome
VZV attacks spiral/vestibular ganglion in inner ear

early aciclovir

Question 10

Herpes zoster oticus - Sx and signs

Answer 10

intense pain, vesicular eruption on auricle/external ear canal

may be followed by sensorineural deafness, vertigo, facial paralysis