week 2 dizzy patient Flashcards

1
Q

what are the 5 vestibular end organs?

A

utricle, saccule, and three semicircular canals (horizontal, superior and posterior)

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2
Q

function of horizontal SCC

A

works L+R (looking when crossing road)

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3
Q

function of superior SCC

A

works on up/down (nodding)

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4
Q

function of posterior SCC

A

works on rotation (touching ear to shoulder)

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5
Q

what does the central pathways involve?

A

vestibulospinal tract

medial longitudinal fasciculus & ocular muscles

medial lemniscus & thalamus & cerebrum

cerebellum via inferior cerebellar peduncle

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6
Q

what systems can affect the balance system?

A

CVS, ear, eye, joints, brain

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7
Q

ear problems affecting balance

A

BPPV
Ménière’s
Vestibular Neuronitis

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8
Q

heart problems affecting balance

A

Arrhythmias

Postural Hypotension

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9
Q

joint problems affecting balance

A

DM
Arthritis
Neurology

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10
Q

eye problems affecting balance

A

Cataracts

D. mellitus

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11
Q

brain problems affecting balance

A

Stress causing hyperventilation
Migraine
SOL
MS

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12
Q

what does problem with VOR (VESTIBULO-OCULAR REFLEX) indicate?

A

(neuro)vestibular problem

mainly vestibular problems

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13
Q

what is nystagmus used for?? direction?

A

to check vestibular function

normally horizontal but can be any direction depending on structures involved

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14
Q

how to take Hx of vertigo?

A
Triggers?
Time Course?
Associated symptoms?
Alleviating factors?
Medication?
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15
Q

how to examine person with vertigo?

A
Otoscopy
Neurological
Blood pressure including lying/standing (with electronic machine)
Balance system
Audiometry
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16
Q

common causes of vertigo and how to diagnose

A

Postural dizziness = History, Hb, Na, BP lying/standing

Side effect of medication = History

psycogenic

17
Q

specific causes of vertigo

A
Ménière's Disease
BPPV
Vestibular Neuronitis
Labyrinthitis
Migrainous Vertigo
18
Q

BPPV (benign Positional Paroxysmal Vertigo) incidence

A

IT IS VERY COMMON

It is the commonest cause of vertigo on looking up

19
Q

causes of BPPV

A

Head trauma, ear surgery, idiopathic

20
Q

pathogenesis of BPPV

A

Otolith material from utricle displaced into semicircular canals. (calcium carbonate) Most commonly in posterior SCC.

21
Q

what may BPPV be confused with?

A

Vertebrobasilar insufficiency/ VBI (ischemia to posterior part of brain)

22
Q

how to distinguish between BPPV and VBI

A

For a diagnosis of VBI need other symptoms of impaired circulation in posterior brain associated with the vertigo

e.g. visual disturbance
weakness
numbness

23
Q

PC of BPPV

A
  • looking up
  • turning in bed - often worse to one side
  • first lying down in bed at night
  • on first getting out of bed in the morning
  • bending forward
  • rising from bending
  • moving head quickly – often only in one direction

-brief episodes + no tinnitus, hearing loss, aural fullness

24
Q

how to diagnose BPPV

A

hallpike’s test.

  • look for nystagmus in eyes, delay 30 secs approx. test fatigues.
25
Q

how to treat BPPV

A

Epley Manoeuvre; in clinic

Brandt-Daroff exercise - if too big, immobile; at home

26
Q

Vestibular Neuronitis PC

A
Prolonged vertigo (days). most sever initially then gets better over 2/3weeks. nausea and vomiting may occur.
No associated tinnitus or hearing loss
27
Q

pathogenesis of Vestibular Neuronitis

A

Probable viral aetiology

May be viral prodromal symptoms

28
Q

Labyrinthitis PC

A

[]affects whole ear]
Prolonged vertigo (days),
May be associated tinnitus or hearing loss

29
Q

pathogenesis of Labyrinthitis

A

Probable viral aetiology

May be viral prodromal symptoms

30
Q

treating Labyrinthitis and Vestibular Neuronitis. complications

A

Reassure the person that symptoms will usually settle over several weeks: if prolonged/atypical refer.

vestibular sedatives: Cyclizine, Prochlorperazine = buccastem (given buccal so vomiting doesn’t affect dose)

may lead to permanent damage (prolonged) and need rehab (majority recover fine)

31
Q

Ménière’s Disease PC

A

History of recurrent, spontaneous, rotational vertigo with at least two episodes >20mins (often lasting hours)

preceding/Occurrence of tinnitus on the affected side and/or Documented Significant sensorineural hearing loss) on at least one occasion/of aural fullness on the affected side

gets worse over time (balance + hearing)

usually Ménière’s occurs in one ear or self-limitinh

32
Q

how to diagnose Ménière’s DiseasE?

A

Other causes excluded, diagnosis of excluding, rare so exclude other causes…

EG:vestibular schwanoma, intracranial lesion

33
Q

management of ménière’s DiseasE? mild; severe

A

Supportive treatment during episodes (buccostem/ prochlorperazine)
Tinnitus therapy
Hearing Aids
Prevention [Salt restriction / Betahistine / caffeine / alcohol / stress]

Grommet insertion / Meniette
Intratympanic Gentamicin / Steroids (Gent= destroy ear and balance function, stops disease - potentially can still get hearing loss/tinnitus; steroid = new treatment early days but may help)
Surgery
[can only do if one ear]

34
Q

what is aural fullness?

A

pressure in the ears

35
Q

Migrainous Vertigo PC

A

migrane (not always), vertigo and ataxia, motion sickness.

Phonophobia is the most common auditory symptom but hearing loss that fluctuates/acute permanent may occur in some

36
Q

diagnosing Definite Migrainous Vertigo

A

Episodic vestibular symptoms of at least moderate severity (interfere but not impede daily activities)
Migraine according to International Headache Society criteria
At least 1 of the following during at least 2 attacks:
Migrainous symptoms during vertigo, migraine-specific precipitants of vertigo, response to anti-migrainous drugs
Other causes ruled out

37
Q

diagnosing probable Migrainous Vertigo

A

Episodic vestibular symptoms of at least moderate severity (interfere but not impede daily activities)
At least 1 of:
Migrainous headache, photophobia, phonophobia, visual or other aura
Other causes ruled out