USMLE Prep - Medical Reference Library

Benign Paroxysmal Positional Vertigo — Diagnosis & Epley

System: Otolaryngology • Reviewed: Aug 31, 2025 • Step 1Step 2Step 3

Synopsis:

BPPV: brief positional vertigo from canalithiasis. Diagnose with Dix‑Hallpike (posterior canal) and supine roll (horizontal canal). Treat with canalith repositioning (Epley, BBQ roll); avoid prolonged vestibular suppressants.

Key Points

  • Stabilize ABCs; begin targeted evaluation without delaying life-saving therapy.
  • Use system-specific risk tools to guide testing and disposition.
  • Order high-yield tests first; escalate imaging when indicated.
  • Start evidence-based initial therapy and reassess frequently.

Algorithm

  1. Primary survey and vitals; IV access and monitors.
  2. Focused history/physical; identify red flags and likely etiologies.
  3. Order system-appropriate labs and imaging (see Investigations).
  4. Initiate guideline-based empiric therapy (see Pharmacology).
  5. Reassess response; arrange consultation and definitive management.

Clinical Synopsis & Reasoning

For Benign Paroxysmal Positional Vertigo Diagnosis Epley, frame the differential by acuity and pathophysiology, then align diagnostics to the leading hypotheses. Prioritize stabilization while obtaining high‑yield studies such as CBC (Baseline hematology), BMP (Electrolytes/renal). Incorporate bedside imaging and targeted labs to define severity and identify complications; synthesize results with clinical trajectory to refine the working diagnosis and disposition needs.


Treatment Strategy & Disposition

Initiate disease‑directed therapy alongside supportive care, titrating to objective response. Pharmacologic options commonly include Analgesia/Antipyretics. Use validated frameworks (e.g., Maneuvers by Canal) to guide escalation and site of care. Address precipitating factors, de‑escalate empiric therapies with data, and arrange follow‑up for monitoring and risk‑factor modification; admit patients with instability, high risk of deterioration, or needs for close monitoring.


Management Notes

Document side and canal. Provide printed home Epley instructions; caution about driving until stable.


Epidemiology / Risk Factors

  • Risk factors vary by condition and patient profile

Investigations

TestRole / RationaleTypical FindingsNotes
CBCBaseline hematologyAbnormal counts
BMPElectrolytes/renalDerangements

Maneuvers by Canal

CanalPreferred Maneuver
PosteriorEpley (canalith repositioning)
Horizontal geotropicBBQ roll (Lempert)
Horizontal apogeotropicGufoni (affected‑up)
AnteriorReverse Epley/Deep head hanging
RefractoryVestibular PT

Pharmacology

MedicationMechanismOnsetRole in TherapyLimitations
AcetaminophenAnalgesic/antipyreticHoursSymptom control as appropriateHepatotoxicity (overdose)
Ondansetron5-HT3 antagonismMinutesAntiemesis if neededQT prolongation

Prognosis / Complications

  • Prognosis depends on severity, comorbidities, and timeliness of care

Patient Education / Counseling

  • Explain red flags and when to seek emergent care.
  • Reinforce medication adherence and follow-up plan.

References

  1. AAO‑HNS BPPV Guideline — Link