NeurologicalVestibular RehabilitationAdvanced LevelProfessionals
Posterior Canal BPPV: Positional Testing, Repositioning and Safety
A practical, evidence-informed guide to posterior canal bppv: positional testing, repositioning and safety, with safety screening, clinical reasoning, intervention progression and outcome-based reassessment.
11 October 20269–12 min readEvidence sources included
What You Should Be Able to Explain After Reading
- Identify the brief position-triggered vertigo pattern of posterior-canal BPPV.
- Interpret Dix–Hallpike findings and recognize central vestibular warning signs.
- Plan repositioning, reassessment and fall-risk management.
What moves inside the ear?
- Displaced otoconia within a semicircular canal can produce inappropriate vestibular signals during head-position changes. Posterior-canal canalithiasis commonly causes brief vertigo when rolling in bed or looking up.
- BPPV is episodic and position-triggered; persistent continuous vertigo should not be casually labeled BPPV.
Focused history
- Ask about episode duration, exact positional triggers, nausea, hearing change, falls, migraine, new headache, neurological symptoms and whether dizziness is continuous between attacks.
- Review cervical mobility, vascular/orthopedic precautions and ability to transfer safely before positional testing.
Examination and interpretation
- With consent and suitable neck positioning, Dix–Hallpike from sitting to head-hanging with the test ear down may elicit delayed, transient torsional upbeating nystagmus and familiar vertigo in posterior-canal BPPV.
- A negative test does not exclude all canal variants. If history suggests BPPV and nystagmus is horizontal or absent, consider supine roll testing or specialist referral for lateral-canal disease.
- Record provoking side, latency, nystagmus direction, duration, symptom response and baseline functional confidence.
Dangerous alternatives
- Acute focal weakness, diplopia, dysarthria, inability to walk unaided, severe new headache or atypical sustained direction-changing nystagmus demand urgent medical evaluation for central pathology.
- Vestibular migraine, orthostatic hypotension, medication effects and unilateral vestibular hypofunction may require different assessment pathways.
Treatment reasoning
- For confirmed posterior-canal BPPV, offer or refer for canalith repositioning such as an appropriately performed Epley maneuver; this targets the mechanical cause rather than general strengthening.
- Positioning should be adapted or referred when cervical instability, major movement restrictions or other relevant medical risks make standard maneuvers unsafe.
- Routine vestibular suppressants and routine postprocedure sleeping restrictions are not recommended for typical BPPV by the 2017 guideline.
Dosage and follow-up
- A repositioning maneuver may be repeated during a visit based on symptoms, tolerance and examination; avoid a rigid universal repetition count.
- Reassess symptom-provoking positions, falls confidence and participation, and review within one month to confirm resolution or investigate persistence/recurrence.
Common mistakes
- Do not prescribe gaze-stabilization exercise as the sole primary treatment for confirmed posterior-canal BPPV.
- Do not infer the affected canal from dizziness alone or ignore atypical neurological findings.
Clinical pearl and summary
- Treat the correct canal and side, not just 'dizziness'. Explain that recurrence can occur and provide safe follow-up instructions.
Evidence & Further Reading
These sources are provided so learners can trace the clinical recommendations and read the original guidance.