Sensorineural Deafness Flashcards
Features of Acoustic neuroma?
Benign tmour of auditory nerve
Unilateral hearing loss
If too big, facial nerve damage or compromised blood loss to brain
What is presbyacusis?
Hearing loss due to ageing
Damage to outer hair cells
Bilateral
Sudden sensoneural hearing loss?
MEDICAL EMERGENCY
Early treatment in sudden sensineural hearing loss
Bed rest
Vasodilators
Carbogen gen
Prednisolone
Features of noise induced hearing loss
Damage to inner ear by sudden or prolonged exposure to excessive noise
How do sudden pressure chages affect the ear?
Ruptures membranes causing leakage of perilymph into middle ear cavity or inner ear
Leads to sensoneural hearing loss, tinnitus and vertigo.
4 irreversible causes of ototoxicity?
Aminoglycosides
Chemotherapy
Diuretics
Salicylates
Where do glomus tumours arise?
Non chromattin paraganglionic tissue
Symptoms of glomus tumours?
Tinnitus synchronous with pulse
Hearing loss
CN 9-12 palsies
Features of herpes zoster oticus?
Virus attacks spinal/vestibular ganglion
Few days later= vesicular eruption of pinna/ext ear
Later= vertigo, facial paralysis, sensoneural deafness
Treatment of herpes zoster otticus
Aciclovir
2 types of tinnitus?
subjective an objective
What is subjective tinnitus?
Hallucination of noises in hood/ears
Can be unbearable
<15 mins is physiological
What is objective tinnitus?
Can be heard by someone else
i.e. vascular bruits
management of tinnitus?
Bilateral- Coping strategies Unilateral- Investigate if >1 year Counselling Hearing aid Snooze facilty Night sedation Tinnitu masher
