Subjective visual vertical after treatment of benign paroxysmal positional vertigo

Braz J Otorhinolaryngol. Nov-Dec 2017;83(6):659-664. doi: 10.1016/j.bjorl.2016.08.014. Epub 2016 Sep 28.

Abstract

Introduction: Otolith function can be studied by testing the subjective visual vertical, because the tilt of the vertical line beyond the normal range is a sign of vestibular dysfunction. Benign paroxysmal positional vertigo is a disorder of one or more labyrinthine semicircular canals caused by fractions of otoliths derived from the utricular macula.

Objective: To compare the subjective visual vertical with the bucket test before and immediately after the particle repositioning maneuver in patients with benign paroxysmal positional vertigo.

Methods: We evaluated 20 patients. The estimated position where a fluorescent line within a bucket reached the vertical position was measured before and immediately after the particle repositioning maneuver. Data were tabulated and statistically analyzed.

Results: Before repositioning maneuver, 9 patients (45.0%) had absolute values of the subjective visual vertical above the reference standard and 2 (10.0%) after the maneuver; the mean of the absolute values of the vertical deviation was significantly lower after the intervention (p<0.001).

Conclusion: There is a reduction of the deviations of the subjective visual vertical, evaluated by the bucket test, immediately after the particle repositioning maneuver in patients with benign paroxysmal positional vertigo.

Keywords: Benign paroxysmal positional vertigo; Equilíbrio postural; Inner ear; Orelha interna; Postural balance; Utricle; Utrículo; Vertigem posicional paroxística benigna.

Publication types

  • Comparative Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Benign Paroxysmal Positional Vertigo / physiopathology*
  • Benign Paroxysmal Positional Vertigo / therapy*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Orientation, Spatial / physiology
  • Otolithic Membrane / physiopathology
  • Patient Positioning / methods*
  • Posture / physiology
  • Reference Standards
  • Reference Values
  • Semicircular Canals / physiopathology
  • Statistics, Nonparametric
  • Treatment Outcome
  • Vestibular Function Tests / methods*
  • Visual Perception / physiology*