Vertigo

 BPPV: Clinical Assessment and Management for Healthcare Professionals Pathophysiology and Canal Involvement Benign paroxysmal positional vertigo results from otoconia—calcium carbonate crystals—becoming dislodged from the utricle and migrating into one of the semicircular canals, most commonly the posterior canal. This displacement causes abnormal fluid movement within the affected canal during head motion, triggering the characteristic vertigo and nystagmus. BPPV accounts for approximately twenty to thirty percent of all vertigo cases and is more prevalent in older adults, though it can occur at any age. The condition can be idiopathic or secondary to head trauma, vestibular neuritis, or prolonged immobilization. The posterior canal is affected in approximately eighty to ninety percent of cases, making it the most common presentation. Horizontal canal BPPV occurs in ten to twenty percent of cases and typically presents with a different nystagmus pattern. Anterior canal involvement is rare, accounting for less than one percent of cases. Understanding which canal is affected is crucial for selecting the appropriate treatment maneuver and predicting treatment outcomes.

Clinical Assessment and Diagnosis

Diagnosis relies on a detailed history followed by specific positional testing. The Dix- Hallpike maneuver remains the gold standard for posterior canal BPPV, eliciting characteristic up beating and torsional nystagmus with a brief latency period. For suspected horizontal canal involvement, the supine roll test or Pix test can be employed. Additional tests such as the head impulse test and gaze stabilization assessment help rule out other vestibular pathologies. Careful observation of nystagmus characteristics—including direction, latency, duration, and fatigability—informs both diagnosis and prognosis.

Treatment Protocols and Outcomes

Canalith repositioning procedures, primarily the Epley maneuver for posterior canal BPPV and the Lempert roll or Gufoni maneuver for horizontal canal involvement, are the gold standard treatment with success rates exceeding eighty percent after a single session. The procedure mechanically guides otoconia back into the utricle, resolving the pathophysiology. Most patients experience symptom resolution within one to three days, though some may require repeat treatment. Vestibular rehabilitation exercises support long-term recovery and reduce recurrence rates, which are approximately thirty percent at one year.

Persistent Symptoms and Referral Criteria

Most patients achieve resolution with one to two treatment sessions. However, persistent symptoms despite appropriate intervention warrant investigation for alternative diagnoses such as central vertigo, vestibular neuritis, or migraine-associated dizziness. Referral to neurology or otolaryngology should be considered if symptoms persist beyond two weeks, if nystagmus patterns are atypical, or if additional neurological signs are present. Some patients may benefit from short-term vestibular-suppressant medication during acute phases, though evidence supports early mobilization and vestibular rehabilitation as the primary recovery strategy.