title: The use of videonystagmography head impulse test (VHIT) in the diagnostics of semicircular canal injuries in patients with vertigo.
abstract: OBJECTIVE
  The aim of the study was to assess the function of semicircular canal in videonystagmography head impulse test (VHIT) in the patients with vertigo and balance disorders.
  
  
  METHODS
  The study was performed in 135 patients (86 women and 49 men) aged 22-79 years, who were divided into 2 groups: I (study group) - 73 patients with vertigo of peripheral, central or mixed origin, II (control group) - 62 patients without vertigo (healthy individuals). The function of canal was determined on the basis of GAIN and expressed as DG/RH×100% (where DG is deviation of gaze and RH is rotation of head).
  
  
  RESULTS
  In the study group the semicircular canal injuries were found in 37 (50.69%) patients, including 24 (32.87%) patients with 1 injury and 13 (17.8%) patients with 2 or more injuries in semicircular canal. The injured anterior semicircular canal was reported 13 times; the lateral - 9 times and the posterior - 31 times.
  
  
  CONCLUSIONS
  In the study group, in the VHIT, injuries in semicircular canals were reported in peripheral vertigo, mixed vertigo with non-compensated and compensated function of the labyrinth in 50.68% cases, whereas in the caloric test dysfunction of the labyrinth was found in 58.49% cases.
authors.affiliation: Department of Otolaryngology and Laryngological Oncology, Medical University of Lodz, Łódź, Poland.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Miłoński
authors.forename: Piotr
authors.initials: P
authors.lastname: Pietkiewicz
authors.forename: Marzena
authors.initials: M
authors.lastname: Bielińska
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Kuśmierczyk
authors.forename: Jurek
authors.initials: J
authors.lastname: Olszewski
mesh_terms: D000328:Adult; D000368:Aged; D004584:Electronystagmography / Q000379:methods*; D005260:Female; D064087:Head Impulse Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D015203:Reproducibility of Results; D012665:Semicircular Canals / Q000503:physiopathology*; D014717:Vertigo / Q000175:diagnosis* / Q000503:physiopathology; D015837:Vestibular Diseases / Q000175:diagnosis* / Q000503:physiopathology; D014743:Videotape Recording / Q000379:methods*; D055815:Young Adult