bppv ppt
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BENIGN PAROXYSMAL POSITIONAL VERTIGO
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Basic Anatomy
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BPPV
• Barany 1921• Dix-Hallpike 1952 – important features of
nystagmus • Abnormal sensation of motion elicited by
certain critical positions• Provocative position nystagmus• At least 20% of vertigo• Underestimated
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BPPV …
• Subclassification : scc post/lat/ant/bilat• Pathophysiology :– Canalithiasis– cupulolithiasis
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Pathophysiology
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Pathophysiology (cont.)
• Cupulolithiasis :– Harold Schuknecht 1962 – Densities (otocania) adherent to cupula of crista
ampullaris– Basophilic particles -1969
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• Canalithiasis :– John Epley – 1980– Densities free floating in canal portion– Parnes , McClure – 1991 found particles in post
SCC
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BPPV ...
• Frequency : 10-64/100000• Sex : 64% women• Age : older population ( 51-57) younger than 35 – head trauma.• History : – sudden – days-weeks– occassionally months -years – episodes.
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• Physical : – neurological examination – normal– except – Dix-Hallpike pathognomonic
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BPPV …
• Nystagmus : characterization and types – RT / LT , vertical / horizontal , changing– Tortional = Rotational – clockwise /
counterclockwise– Geotropic- toward the earth– Ageotropic – opposite
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BPPV …
• Classic post SCC – geotropic rotatory nystagmus
• Horizontal SCC – purely horizontal nystagmus• Non-fatiguing nystagmus – cupulolithiasis >
canalithiasis
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Classic BPPV
• Involved the POST SCC – Geotropic NG with affected ear down– Rotatory , fast phase toward the undermost
ear– Latency – few seconds– Duration – limited < 20 seconds– Reversal upon return upright position– Response decline upon repetitive provocation
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Lat. SCC PPV
• Most common atypical BPPV• 3-9% of cases• Consequence of Epley maneuver• Horizontal purely nystagmus• Cupulolithiasis rather than canalithiasis• Modified Epley / lampert maneuver …
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Lat. SCC PPV
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Ant. SCC PPV
• Rare – 2%• Down-beating /torsional NG for the opposite
ear on Dix-Hallpike maneuver
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BPPV - Causes
• Predisposing factors :– Inactivity – Acute alcoholism– Major surgery– CNS disease
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Causes ( cont. )
• Idiopathic – 39% • Ear disease – 29%– OM – 9%– Vestibular neuritis – 7%– Menier’s dis – 7%– Otosclerosis – 4%– Sudden SNHL – 2%
• Trauma – 21%
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Causes ( cont. )
• Trauma – 21%• CNS diseases – 11%• Acustic neuroma – 2%• Cervical vertigo – 2%
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BPPV - D.D
• Menier’s disease• Inner ear concussion• Alcohol intoxication• Labyrinthitis• Vascular loop syndrome• Post. Fossa lesions : acustic neuroma , meningioma• Central origion : stroke , MS , cerebellar degeneration• Vertibral artery insuffeciency• Cervical vertigo
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BPPV - Treatment
• Watchful waiting• Vestibular suppressant medications• Vestibular rehabilitation• Canalith repositioning• Surgery care– Labyrinthectomy– Post. Canal occlusion– Singula neurectomy – Transtympanic aminpglycoside application
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Trials about BPPV
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General
• Labeled benign paroxysmal positional vertigo is not always benign
• Evaluation of the effectiveness of canalith reepositioning procedurs – CRP
• Several studies …
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Trials …
• Blakely – 1994 :– 50% improvement in the control and CRP group !!
( 2-3 months)
• Lynn – 1995 :– Randomized-controlled : 89% negative DH in CRP
group , 27% in the control group
• John Li (1995) :
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Trials…
• John Li (1995) :– Comparison CRP / CRP + mastoid oscillation and control– Modified Epley maneuver – Use of colar and head elevation after CRP– No spontaneous resolution within aweek– 60% symptoms improvement in CRP group– 92% symptoms improvement in CRP +mastoid oscilation
and 70% negative DH
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Trials…
• R. steenerson –1996 :– Comparison of CRP and vestibular habituation
training– Tow approaches are effective in symptomatic
relief ( 3 months)– CRP faster relief and fewer treatments
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Trials …
• K. Yimatae (2003)– Randomized-controoled – Modified Epley maneuver, no mastoid oscillator and no
instructions after the maneuver– Subjective and objective weekly follow-up – CRP group – 76% negative DH, 48% control group– CRP group – 96% symptoms improvement , 90% control
group– Non-cured patients need > 6 procedures in 2 weeks ,
should considering liberatory maneuver
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Elderly population and BPPV
• S. Angeli – 2003 :– Effectiveness of CRP and VR– Modified Epley :
• Elderly comorbidities : degenerative osteoarthritis disease , CVA , peripheral neuropathy, cognitive and autonomic dysfunctions
• S/E of CRP – neck torsion and extension result in vertibrobasilar artery insufficiency, strain on the spine column, dislodged carotid a. emboli
• Avoid liberatory maneuver – 64% CRP group – negative DH after a month – Overall 77% with CRP and VR
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CRP Meta-Analysis B. Woodworth - 2004
• CRP - First line of treatment– Non-invasive– Easy to perform in the office– No need to expensive instrumentations– Repeat maneuver if needed– Potential to provide rapid relief of vertigo
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Meta - Analysis
• 9 randomized-controlled trials • Symptoms resolution and elimination of
positive Dix-Hallpike test• CRP more effective than control ( x5 )• Untreated patients - symptoms improvements
with time but positive DH• So Resolution of vertigo – avoidance of
provocative positions
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CRP – Epley maneuver
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CRP – Semont maneuver
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Mastoid oscillator
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Brandt-Daroff Exsercise
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Lampert maneuver- Lat. SCC BPPV
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Vestibular rehabilitaions
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Complications of CRP
• Failure – 25% (12%-56)• Recurrence – 13% in 6 months• Side effects – Nausea – Vomiting– Fainting– Sweating
• Worse vertigo – LAT SCC PPV
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