[Interpretation of updated version of BPPV clinical practice guideline: diagnosis and examination]

In 2008, American Academy of Otolaryngology-Head and Neck Surgery Foundation（AAO-HNSF）published the first clinical practice guideline for Benign Paroxysmal Positional Vertigo (BPPV) based on evidence-based methodology. The primary purposes of this guideline were to improve quality of care and outcomes for BPPV by enhancing the accuracy and efficacy of diagnosis of BPPV, reduce the inappropriate use of vestibular suppressant, and decrease the inappropriate use of ancillary examinations. The guideline was updated in 2017. This paper aimed at interpreting the updated guideline with a focus on diagnosis and ancillary tests section. Changes from the prior guideline include removal of the "no recommendation" for audiometric; expansion of the recommendations with respect to radiographic and vestibular testing, and broadening out the overall framework of differential diagnosis regarding BPPV.