Benign positional vertigo develops when crystals of calcium carbonate moves free from Utricle’s glycoprotein membrane and floats within the tube of SCC’s.
Description
- Most common peripheral vestibular disorder.
- Causes: spontaneous, post-traumatic, post-viral infection.
- Affects posterior (90%), horizontal (10%), or superior (rare) semicircular canal.
Presentations
- Recurrent episodes of brief positional vertigo, nausea, and prolonged lightheadedness.
- No hearing loss.
Management
- Typically self-limiting, may recur.
- Education, reassurance, observation.
- Repositioning Procedure (Epley Maneuver-Brandt-Daroff).
- Surgery.
Dix Hallpike Maneuver
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Used to provoke nystagmus and vertigo commonly associated with BPPV
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The patient is seated on the exam table with head turned 45 degrees to the side and brought rapidly into the supine position with head hanging over the table. Head supported and rapidly placed into head hanging position.
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This maneuver allows maximal stimulation of the posterior SCC.
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Frenzel glasses eliminate visual fixation suppression of response
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