title: Benign paroxysmal positional vertigo commonly occurs following repair of superior canal dehiscence.
abstract: Repair of superior canal dehiscence (SCD) often results in the resolution of preoperative auditory and vestibular symptoms; however, many patients experience dizziness in the postoperative period. Postoperative dizziness may be the result of new-onset benign paroxysmal positional vertigo (BPPV). This study aims to investigate the prevalence of BPPV before and following SCD repair.
  
  
  
  Retrospective chart review at a tertiary care center.
  
  
  
  Electronic medical records were reviewed for patients with a diagnosis of SCD syndrome (SCDS) between January 2002 and May 2015. Collected information included demographic data, incidence of BPPV diagnosed by Dix-Hallpike maneuver before and following surgery, operative technique, repair material, and the duration of time to BPPV onset.
  
  
  
  A total of 180 patients with a diagnosis of SCDS were identified: 84 patients underwent surgery (operated subjects) and 96 were observed (nonoperated, control group). In operated subjects, 20 of 84 (23.8%) developed BPPV following SCD repair versus 6.2% of nonoperated (P < 0.005). Benign paroxysmal positional vertigo lateralized to the operated side in all but one subject whose laterality was unknown (P < 0.0001). There were no associations of BPPV with surgical approach (P = 0.50) or repair material (P = 0.33). The majority of subjects (58%) were diagnosed with BPPV within 3 months of surgery.
  
  
  
  New-onset BPPV occurs commonly after SCD repair and may be the result of mobilized otoliths from inner ear pressure changes. Although the exact etiology of post-SCD repair BPPV remains unknown, postoperative dizziness is important to discuss with patients during preoperative counseling.
  
  
  
  4. Laryngoscope, 126:2092-2097, 2016.
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Samuel R
authors.initials: SR
authors.lastname: Barber
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Yew Song
authors.initials: YS
authors.lastname: Cheng
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Maryanna
authors.initials: M
authors.lastname: Owoc
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Brian M
authors.initials: BM
authors.lastname: Lin
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Aaron K
authors.initials: AK
authors.lastname: Remenschneider
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Elliott D
authors.initials: ED
authors.lastname: Kozin
authors.affiliation: Department of Otology and Laryngology, Harvard Medical School, Boston, Massachusetts, U.S.A.|Department of Otolaryngology-Head and Neck Surgery, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, U.S.A.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D065635:Benign Paroxysmal Positional Vertigo / Q000453:epidemiology* / Q000209:etiology*; D005260:Female; D006801:Humans; D007759:Labyrinth Diseases / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000453:epidemiology* / Q000209:etiology*; D015995:Prevalence; D012189:Retrospective Studies; D012665:Semicircular Canals
keywords: Benign paroxysmal positional vertigo; dizziness; outcomes; plugging; resurfacing; superior canal dehiscence; superior canal dehiscence syndrome; surgery