Vertigo. Quick Bedside Assessment
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- Flora Lewis
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1 Vertigo Quick Bedside Assessment
2 Nothing to Disclose
3 Your patient presents with dizziness, dysequilibrium or nystagmus How do I ask the right questions? Is this vertigo? Does the patient have peripheral or central vertigo? Can I examine the patient in 10 minutes and know what is going on? Should I order an MRI? Will the MRI really answer the question or just make me feel less anxious?
4 Balance
5 When we lose balance, we get.anxious
6 Vestibular System Function Balance Maintenance of visual fixation Muscle tone Dizziness occurs when the brain cannot resolve sensory conflict between visual, vestibular and proprioception systems. Clinicians can use visual fixation disturbance signs to figure out where the problem is.
7 Vestibular Cochlear Complex Three specialized hair cell organs for hearing, rotational sensation and acceleration/deceleration sensation.
8 Macula of Utricle and Saccule
9 Semicircular Canal Function
10
11
12 Internal Auditory Artery May arise from basilar artery or AICA
13 Neural Pathways for Oculomotor Control Pathway Purpose Anatomical structures Vestibuloocular Reflex Stabilization of gaze during impulsive head movement Vestibular nucleus, MLF, Nucleus of VI, Nucleus of IV Saccadic Eye Movement Refixation on new target Frontal Eye Fields, Cerebellum, Brainstem Smooth Pursuit Track slow objects with foveal vision Occipital and Parietal Cortex, Brainstem Optokinetic Pursuit Tracking with peripheral vision Occipital and Parietal Cortex, Brainstem
14 Dog after ear cleansing flush into right ear with cold water. The eyes deviate toward the cold or dead labyrinth (slow phase). When nystagmus occurs, it is a corrective saccade away from the nonfunctioning labyrinth (quick phase).
15 Optokinetic Nystagmus
16 Rotary Nystagmus
17 Pendular Nystagmus
18 Differential Diagnosis of Dizziness Medullary or Cerebellar infarct due to PICA occlusion (Wallenberg syndrome), Cerebellar infarct due to AICA occlusion, Vertebrobasilar insufficiency, Multiple sclerosis, seizures, Chiari malformation, cerebellar tumor or hemorrhage, Cerebellopontine angle tumor (acoustic neuroma, meningioma), Infection (Lyme, syphilis), Migraine, Labyrinthine disease, visual impairment (new glasses, retinal disease etc.),cervical myelopathy with posterior column involvement ( cervical spondylosis, B12 deficiency), polyneuropathy ( diabetes, chemotherapy etc.), vestibular neuronitis/labyrinthitis/ischemic labyrinthine injury, otitis media/cholesteatoma/meningitis etc., syphilis/ Lyme, medication, trauma/surgery, benign paroxysmal positional vertigo (BPPV), disorders of endolymphatic pressure regulation (Meniere s disease, superior canal dehiscence, perilymphatic fistula. Blah, blah, blah, blah, blah, blah, blah. If you can read this, you have pretty good eyes, If you can read this, you must be in the front row. If you are reading this, try harder to listen to the lecture.
19 History.. Be Logical and Intuitive Distinguish between vertigo, oscillopsia, dysequilibrium, presyncope, brain fog. Temporal pattern: affected by head movement, affected by surroundings, chronic or episodic. Auditory symptoms: decrease or increase of hearing, ear fullness or pain, tinnitus or noise. Associated symptoms: vision change, diplopia, numbness of face or limb, change of limb dexterity, alteration of speech or swallowing, balance change. Ototoxic medications or polypharmacy.
20 Labyrinthine Disease Vestibular neuronitis/labyrinthitis/ischemic labyrinthine injury/otolithic avalanche Benign paroxysmal positional vertigo (BPPV) Disorders of endolymphatic pressure regulation (Meniere s disease, superior canal dehiscence, perilymphatic fistula) Trauma/surgery Otitis media/cholesteatoma/meningitis etc. Medication
21 Benign Paroxysmal Positional Vertigo (BPPV)
22 Acoustic Neuroma
23 Superior Canal Dehiscence
24 Perilymphatic Fistula
25 Neurological Causes due to Dysfunction of Central Integration Medullary or Cerebellar infarct due to PICA occlusion (Wallenberg syndrome) Cerebellar infarct due to AICA occlusion Vertebrobasilar insufficiency Migraine (vestibular migraine, basilar artery migraine) Multiple sclerosis Seizures Chiari malformation Cerebellar tumor or hemorrhage Cerebellopontine angle tumor (acoustic neuroma, meningioma) Infection (Lyme, syphilis)
26 Lateral Medullary Infarct/Wallenberg Syndrome Vertigo, Horner Syndrome, INO, Loss of Pain and Temperature (may be crossed)
27 Benign Paroxysmal Torticollis/Vertigo
28 Neurological Causes of Dysequilibrium due to Disruption of Sensory Imput Labyrinthine disease Visual impairment (new glasses, retinal disease etc.) Cervical myelopathy with posterior column involvement (cervical spondylosis, B12 deficiency). Polyneuropathy ( diabetes, chemotherapy etc.) Trauma/cervical vertigo
29 Neuro-otological exam Part 1 BP and pulse Head and neck exam Hearing ( rubbing fingers, phone, 256 Hz tuning fork, Rinne and Weber) Cranial nerve exam (especially V, VII, IX, X) Internuclear ophthalmoplegia (INO), pain and temp loss, limb ataxia. Dysarthria, swallowing deficit Balance assessment (gait, tandem walk, Romberg, single leg stance etc.)
30 Neuro-otological exam Part 2 Extraocular movements (saccades and smooth pursuit) Oculovestibular Reflex Spontaneous and gaze evoked nystagmus Head thrust test Head shaking nystagmus test Visual acuity during head movement Dix Hallpike manuever ( For BPPV) Valsalva and sound stress tests (for SSCD) Voluntary hyperventilation
31 Head Thrust Test
32 Head Thrust Test
33 Positive Head Thrust Test Slow Motion
34 Head Thrust Test Patient admitted for stroke
35 Head Shaking Test
36 Benign Paroxysmal Positional Vertigo (BPPV)
37
38 Benign Paroxysmal Positional Vertigo (BPPV)
39 Dix Hallpike Manuever *Dix Hallpike is more sensitive if done in the morning due to fatigability feature. *Fixation suppression increases sensitivity. Feature Peripheral Central Latency 3-5 seconds Immediate Duration Shorter (5-60 seconds) Longer Fatigability Yes No Reversal upon sitting up Maybe No Vertigo/nausea Common Uncommon
40 Dix Hallpike Maneuver
41 Epley Maneuver (courtesy of Wikipedia and Dr. John Epley) The patient begins in an upright sitting posture, with the legs fully extended and the head rotated 45 degrees towards the affected side. The patient is then quickly and passively forced down backwards by the clinician performing the treatment into a supine position with the head held approximately in a 30 degree neck extension (Dix-Hallpike position) where the affected ear faces the ground. The clinician observes the patient's eyes for primary stage nystagmus. The patient remains in this position for approximately 1 2 minutes. The patient's head is then turned 90 degrees to the opposite direction so that the unaffected ear faces the ground, all while maintaining the 30 degree neck extension. The patient remains in this position for approximately 1 2 minutes. Keeping the head and neck in a fixed position relative to the body, the individual rolls onto their shoulder, rotating the head another 90 degrees in the direction that they are facing. The patient is now looking downwards at a 45 degree angle. The eyes should be immediately observed by the clinician for secondary stage nystagmus and this secondary stage nystagmus should beat in the same direction as the primary stage nystagmus. The patient remains in this position for approximately 1 2 minutes. Finally, the patient is slowly brought up to an upright sitting posture, while maintaining the 45 degree rotation of the head. The patient holds sitting position for up to 30 seconds.
42 Epley Maneuver
43 Treatment (briefly) Most peripheral vestibulopathies are self limited due to CNS adaption processes. Recurrent vertigo may warrant specific therapies. Vestibular suppressant medicines (meclizine, scopolomine, phenothiazines etc.) may provide symptomatic relief for sustained peripheral vestibulopathies and expense of slowing down CNS adaption and recovery. Medication is unhelpful for BPPV. Brandt Daroff exercises my speed up central adaption but can aggravate certain forms of BPPV. Physical therapy evaluation can help with assessment and with treatment of certain types of vertigo, especially BPPV. DizzyFix for BPPV ENT and Neurology referrals may be needed for protracted or unusual cases. OHSU Vestibular (Balance) Program VEDA (Vestibular Disorders Association)
44 Vestibular Assessment at PeaceHealth Physical Therapy Department
45 Finis
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