BPPV

Question 1

common cause of..

Answer 1

recurrent episodes of vertigo triggered by head movement

peripheral cause of vetigo

Question 2

presentation

Answer 2

variety of head movements can trigger vertigo
common trigger is turning over in bed

symptoms 20-60s for each attack, epidosed occur over several weeks

no hearing loss or tinnitus

Question 3

pathophysiology

Answer 3

calcium carbonate crystals (otoconia) become displaced into semicircular canals

they disrupt normal flow of endolymph ocnfusing the vestibular system

Question 4

causes of otoconia to become displaced

Answer 4

no clear cause
viral infection
head trauma
ageeing

Question 5

diagnostic test

Answer 5

Dix-hallpike manoeuvre

Question 6

Dix hallpike manouvre

Answer 6

• pt sat up head turned 45º
• rapidly lower head until head hanging off end couch
• hold patients head still, remaining45º
• watch eyes for 30-60s for nystagmus

Question 7

Dix-hallpike manouvre - what indicates BPPV

Answer 7

rotational nystagmus

symptoms of vertigo

Question 8

treating BPPV

Answer 8

epley manoeuvre

idea is to put crystals in position that won’t disrupt endolymph flow