Clinical effect of canal plugging on paroxysmal positional vertigo

A 63-year-old woman had disabling positional vertigo for four months. She s howed intense direction-changing apogeotropic nystagmus. Conservative treat ment failed to resolve her vertigo. From the findings of the nystagmus, cup ulolithiasis of the right lateral canal was suspected. Plugging of this can al successfully eliminated the nystagmus and positional vertigo. Positional vertigo can sometimes be disabling and unresponsive to conservative therap y. Careful analysis of the nystagmus may allow selection of the most approp riate treatment.