Horizontal direction changing suggests horizontal canal BPPV
Positional maneuvers bedside exam
Positional testing safety
Cervical spine screening
Severe neck pain
Known cervical instability
Orthostasis and syncope risk screen
Marked hypotension
Severe cardiac symptoms
Dix Hallpike findings
Posterior canal pattern
Latency before nystagmus
Brief duration with fatigue
Supine roll test findings
Horizontal canal pattern
Horizontal nystagmus provoked by head turns supine
Side intensity differences for localization
PITFALLS
Common exam traps
Reliance on symptom description without positional testing
Missed BPPV
Overuse of imaging
Labeling all dizziness as BPPV
Missed stroke in acute vestibular syndrome
Missed arrhythmia with presyncope
Differential Diagnosis
Life threatening causes to exclude
Central causes
Posterior circulation ischemic stroke
ICD-10 I63.5
Severe gait ataxia or focal deficits
Intracranial hemorrhage
ICD-10 I61.9
Severe headache or decreased consciousness
Vertebral artery dissection
ICD-10 I77.74
Neck pain with posterior circulation symptoms
Common mimics
Vestibular and otologic
Vestibular neuritis
ICD-10 H81.2
Continuous vertigo for days with spontaneous nystagmus
Ménière disease
ICD-10 H81.0
Episodic vertigo with hearing symptoms
Labyrinthitis
ICD-10 H83.0
Vertigo with hearing loss
Migraine spectrum
Vestibular migraine
ICD-10 G43.809
Photophobia phonophobia migraine history
Non vestibular dizziness
Orthostatic hypotension
ICD-10 I95.1
Lightheadedness on standing
Cardiac arrhythmia
ICD-10 I49.9
Palpitations syncope
Hypoglycemia
ICD-10 E16.2
Diaphoresis tremor confusion
Laboratory Tests
No routine labs in classic BPPV
Routine labs
Typical BPPV pattern
No labs required for diagnosis
No labs required for treatment maneuver
Lab use triggers
Persistent vomiting
Dehydration concern
Targeted labs when indicated
Metabolic and volume assessment
Electrolytes
Repeated emesis
Diuretic use
Serum glucose
Altered mental status
Diabetes or insulin use
Pregnancy test
Reproductive potential
Medication selection implications
Pitfalls and limitations
Labs cannot exclude stroke
Normal electrolytes
No reassurance against central vertigo
Continued need for neurologic assessment when red flags present
Normal glucose
No reassurance against posterior circulation event
Continued clinical risk stratification required
Diagnostic Tests
Scoring Systems
Risk stratification tools
Acute vestibular syndrome decision support
HINTS exam use limited to continuous vertigo with spontaneous nystagmus
Not a BPPV diagnostic tool
ED dizziness guidance
Emphasis on bedside eye exam and targeted maneuvers
Imaging avoidance in low risk presentations
MRI
MRI brain indications
Central concern features
Focal neurologic deficit
Severe truncal ataxia
Persistent symptoms not fitting BPPV
Continuous vertigo at rest
New headache with neurologic signs
MRI limitations
Early posterior circulation stroke
False negatives possible in early timeframe
Continued clinical judgment required
CT
CT head considerations
Typical BPPV presentation
Low diagnostic yield
Not routine
Alternative triggers for CT
Head trauma with concerning features
New severe headache
CT limitations
Posterior fossa sensitivity limitations
Normal CT does not exclude posterior circulation stroke
Clinical and MRI based pathways when indicated
Ultrasound
Bedside vestibular use
Not a BPPV diagnostic modality
Positional tests preferred
Therapeutic maneuvers preferred
Vascular ultrasound in selected cases
Dissection workup guided by local protocols
Specialist consultation when suspected
Disposition
ED discharge criteria
Safe discharge
Classic BPPV confirmed by positional testing
Reproduction of symptoms with expected nystagmus pattern
Improvement after repositioning maneuver
No central red flags
Normal baseline neurologic screen
Independent ambulation between episodes
Symptom control adequate
Oral intake tolerated
No refractory vomiting
Observation or admission triggers
Higher level care
Persistent inability to ambulate
Truncal ataxia
Unsafe for home
Refractory vomiting or dehydration
IV fluids needed
Electrolyte derangements
Central cause concern
Stroke evaluation pathway
MRI or neurology consultation
Follow up planning
Outpatient management
Vestibular therapy referral
Recurrent BPPV
Difficulty with self maneuvers
ENT or neurology referral
Atypical nystagmus
Suspected non BPPV vestibular disorder
Treatment
Canalith repositioning maneuvers
Posterior canal BPPV first line
Epley maneuver
Step sequence
Step 1 sitting head turned 45 degrees toward affected side
Step 2 head hanging position with neck extension
Step 3 head rotation 90 degrees toward unaffected side
Step 4 roll to side with nose toward floor
Step 5 sit up to finish
Practical notes
Symptom and nystagmus guidance on hold times
Repeat in session if persistent findings and tolerated
Semont maneuver alternative
Rapid side to side transitions when tolerated
Useful when Epley not feasible
Horizontal canal BPPV first line
Barbecue roll
Step sequence
Step 1 supine head elevated slightly
Step 2 head turn 90 degrees toward affected side
Step 3 roll to supine then to opposite side in 90 degree steps
Step 4 prone position completion
Step 5 return to sitting
Practical notes
Nystagmus intensity and direction for side localization
Repeat if persistent and tolerated
Gufoni maneuver alternative
Selected by nystagmus type and local expertise
Vestibular therapist support when uncertain
Medications
Symptom control adjuncts
Antiemetics
Ondansetron PO 4 mg
Repeat every 8 hours as needed
QT prolongation risk in predisposed patients
Ondansetron ODT 4 mg
Repeat every 8 hours as needed
Alternative when vomiting limits swallowing
Metoclopramide PO 10 mg
Repeat every 8 hours as needed
Extrapyramidal symptom risk
Vestibular suppressants
General principle
Avoid routine use in BPPV
Short course only for severe nausea limiting maneuvers
Meclizine PO 25 mg
Repeat every 6 to 8 hours as needed
Sedation and fall risk
Supportive care
Safety and environment
Fall precautions
Assisted ambulation until stable
Avoid driving until symptoms controlled
Hydration
Oral fluids when tolerated
IV crystalloid if unable to tolerate PO
Treatment pitfalls
Common errors
Imaging instead of positional testing in classic BPPV
Delayed definitive therapy
Increased cost and radiation
Prolonged vestibular suppressants
Masking symptoms without resolving cause
Increased sedation and falls
Special Populations
Pregnancy
Pregnancy considerations
Diagnosis approach
Positional testing and maneuvers appropriate when tolerated
Left lateral positioning adjustments as needed
Medication selection
Minimize sedating agents
Antiemetic choice based on obstetric guidance
Safety
Fall risk mitigation
Supine intolerance awareness in later pregnancy
Geriatric
Older adult considerations
Higher fall risk
Gait assessment between episodes
Home safety planning
Medication sensitivity
Avoid sedating vestibular suppressants when possible
Anticholinergic burden awareness
Central mimic risk
Lower threshold for stroke evaluation with atypical features
Polypharmacy and orthostasis assessment
Pediatrics
Pediatric considerations
Lower prevalence than adults
Broader differential including migraine and central causes
Trauma related otolith disturbance
Exam and maneuver adaptation
Age appropriate cooperation strategies
Vestibular specialist referral when uncertain
Medication dosing
Weight based prescribing
Avoid unnecessary sedating agents
Background
Epidemiology
Occurrence patterns
Common cause of brief positional vertigo
Often idiopathic
Can follow head trauma or vestibular neuritis
Canal distribution
Posterior canal most common
Horizontal canal less common
Pathophysiology
Mechanisms
Otoconia displacement
Canalithiasis free floating debris
Cupulolithiasis debris adherent to cupula
Canal specific symptom generation
Abnormal endolymph movement with head position change
Triggered nystagmus and vertigo episodes
Therapeutic Considerations
Treatment rationale
Repositioning maneuvers
Mechanical relocation of otoconia
Symptom resolution by removing canal stimulus
Medication role
Symptom relief only
Does not correct otoconia position
Testing and imaging stewardship
Positional tests provide diagnosis at bedside
Imaging reserved for atypical or central concern cases
Patient Discharge Instructions
copy discharge instructions
Discharge instructions
Diagnosis explanation
Brief spinning episodes triggered by head position changes
Inner ear crystal movement problem
What to expect
Symptoms may recur
Improvement often after repositioning maneuver
Home care
Rise slowly from bed
Avoid ladders or risky heights until stable
No driving until vertigo controlled
Home maneuvers
Epley maneuver instructions from clinician or vestibular therapist
Stop and seek care if severe headache or new neurologic symptoms during maneuvers
Return to ED immediately
New weakness numbness or facial droop
New trouble speaking or swallowing
New vision loss or double vision
New severe headache
Persistent inability to walk unassisted
Persistent vomiting with dehydration
Follow up
Vestibular physiotherapy if symptoms persist or recur
Primary care or ENT if recurrent episodes
References
Clinical guidelines and evidence
Core guidelines
AAO-HNSF Clinical Practice Guideline Update Benign Paroxysmal Positional Vertigo 2017
SAEM GRACE-3 Guideline Acute Dizziness and Vertigo in the Emergency Department
Reviews and summaries
PubMed guideline abstract Bhattacharyya et al 2017 Otolaryngology Head and Neck Surgery
Edlow et al 2023 Acute dizziness and vertigo in the emergency department
Supporting evidence
AAFP evidence summary Epley maneuver for BPPV 2015
Neurology practice parameter Therapies for BPPV 2008 retired notice
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.