Exam II Flashcards
What is the MC cause of conductive HL?
Otosclerosis
How does otosclerosis present?
HX - well preserved speech; patients are often soft spoken and aware they hear better in noisy environments
PE - stapes and malleus fuse, this is confirmed with CT
What are the causes of sensorineural HL?
Congenital (Waadenburg's Syndrome - white patch of hair) Viral Traumatic (noise occupations) Inflammatory (strep, measles, syphilis) Neoplastic
How do you differentiate neoplastic SNHL?
U/L hearing loss
R/O w/ MRI
- acoustic neuroma, hearing loss localized in high frequencies
- V wave delayed in affected ear
What does speech audiometry measure?
threshold that speech can be accurately heard
- increase cochlear HL leads to decreased word recognition
Tympanometry measures
TM mobility (impedance)
Which conditions present with stiff tympanometry?
Otosclerosis (Type A)
Inflammatory Conductive HL
What does Electrocholeography record?
electrical potentials of cochlea
Which condition is dx’d with electrocholography?
Meniere’s dz
OR Idiopathic Endolymphatic hydrops
- fluctuating HL; vertigo (episodic), tinnitus, aural fullness
For Acoustic Neuroma - which test is positive with a prolonged time period?
Auditory Brainstem Response
- nerve conduction study (from cochlea to brainstem)
Which minerals help with presbycussis (slow developing SNHL d/t noise)
ZINC
Vit C
Vit E
ALA
What substances are ototoxic?
AMINOGLYCOSIDES (gentamicin, streptomycin, neomycin) Phenytoin Anti-HTN Diuretics NTG Quinine Salicylates Sedatives TB TX sequelae
How do you improve circulation of blood to middle ear?
Vaccinium (bilberry)
Vinpocetine
Gingko
How to differentiate Vestibular Neuritis from Labyrinthitis
BOTH - characteristic peripheral vertigo
VN - Virus PRECEDES vertigo
Labyrinthitis - CONCURRENT infxn, HL
PE for DX Perilymphatic Fistula?
When pressing on tragus or using insufflation it will MAKE SX WORSE
PE for DX of Benign Paroxysmal Positional Vertigo?
Dix Hallpike (brief upbeat, then fatigues)
When performing Dix Hallpike, when should you suspect central vertigo?
Downbeat Nystagmus that DOES NOT fatigue with Dix Hallpike
In gen:
Spontaneous nystagmus
Bidirectional
Vertical
Which test is SPECIFIC for conductive HL?
Rinne
What are the RED FLAGS for stroke?
sudden onset asymmetrical smile (neuro indication) ataxia central nystagmus (vertical) Worst H/A ever > 50 years
how is vertigo most commonly described and what is the MC cause?
“pt says room is spinning around them”
MC d/t Peripheral Labyrinth
Which condition presents with Roaring in the ears?
syncope
How do you differentiate orthostatic BP vs Autonomic Dysfunction?
When testing, lay to stand:
Orthostatic: SBP decreases, HR increases
Autonomic: SBP & HR decrease!!
What is the MC cause of disequilibrium?
Impaired Motor FXN control
Which patients are at risk for increase in falls?
Multiple Sensory Deficit (MSD) - geriatrics patients, gen because of decreased eyesight, poor proprioception, mm weakness
How do you DX lightheadedness?
DX of exclusion
assoc with sweating and pallor - think hypoglycemia, medications, anxiety, encephalopathy
What is Peripheral Vertigo?
Spontaneous nystagmus
Unidirectional
Horizontal