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  • Title: Diagnosis and management of lateral semicircular canal benign paroxysmal positional vertigo.
    Author: White JA, Coale KD, Catalano PJ, Oas JG.
    Journal: Otolaryngol Head Neck Surg; 2005 Aug; 133(2):278-84. PubMed ID: 16087028.
    Abstract:
    OBJECTIVE: Describe the diagnosis, treatment, and outcome of a group of 20 patients with lateral semicircular canal benign paroxysmal positional vertigo (LSC-BPPV). STUDY DESIGN AND SETTING: Retrospective review of 20 patients with LSC-BPPV (10 with geotropic and 10 with apogeotropic nystagmus) presenting to a tertiary balance center. Diagnosis was confirmed with infrared nystagmography in Dix-Hallpike positioning tests and supine positional tests. Patients were treated with one or more particle repositioning maneuvers. RESULTS: Addition of supine positional nystagmus tests to Dix-Hallpike positioning testing improves sensitivity in the diagnosis of LSC-BPPV. Treatment outcomes in the apogeotropic LSC-BPPV group were poorer than the geotropic LSC-BPPV group. SIGNIFICANCE: Adding supine positional testing to routine vestibular diagnostic testing will increase the identification of LSC-BPPV. Apogeotropic LSC-BPPV is more challenging to treat.
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