title: Video head impulse in comparison to caloric testing in unilateral vestibular schwannoma.
abstract: CONCLUSIONS
  Although there was a statistically significant relationship between the results of the vHIT and the caloric test, the limited strength of this relationship suggests that, for unilateral vestibular schwannoma (UVS), caloric testing and vHIT may provide complementary information on vestibular function.
  
  
  OBJECTIVE
  There is limited information that can be used to determine which of the video head impulse test (vHIT) and caloric test might be better used in the diagnosis and management of UVS. In this study, a group of participants with un-operated UVS was studied using both methods.
  
  
  METHODS
  The subjects' vestibular function was assessed using the vHIT and caloric testing. Tumour size was quantified using MRI and their balance disturbance assessed using the Jacobsen Dizziness Handicap Inventory (DHI).
  
  
  RESULTS
  Twenty of 30 subjects had an abnormal canal paresis according to the Jongkees' criterion (> 0.25); however, only 10/30 had an ipsilesional vHIT gain of <0.79. Canal paresis could be predicted from the ipsilesional and contralesional vHIT gains. Tumour size could also be predicted from the ipsilesional vHIT gain and canal paresis. However, DHI scores could not be predicted from the degree of canal paresis, vHIT gain, or the MRI measures.
authors.affiliation: a Department of Medicine , Dunedin School of Medicine , Dunedin , New Zealand.
authors.forename: Isaac
authors.initials: I
authors.lastname: Tranter-Entwistle
authors.affiliation: a Department of Medicine , Dunedin School of Medicine , Dunedin , New Zealand.
authors.forename: Patrick
authors.initials: P
authors.lastname: Dawes
authors.affiliation: b Department of Pharmacology and Toxicology , School of Medical Sciences, University of Otago , Dunedin , New Zealand.|c The Brain Health Research Centre, University of Otago , Dunedin , New Zealand.
authors.forename: Cynthia L
authors.initials: CL
authors.lastname: Darlington
authors.affiliation: b Department of Pharmacology and Toxicology , School of Medical Sciences, University of Otago , Dunedin , New Zealand.|c The Brain Health Research Centre, University of Otago , Dunedin , New Zealand.|d The Brain Research New Zealand Centre of Research Excellence , Dunedin , New Zealand.
authors.forename: Paul F
authors.initials: PF
authors.lastname: Smith
authors.affiliation: a Department of Medicine , Dunedin School of Medicine , Dunedin , New Zealand.|c The Brain Health Research Centre, University of Otago , Dunedin , New Zealand.|d The Brain Research New Zealand Centre of Research Excellence , Dunedin , New Zealand.
authors.forename: Nicholas
authors.initials: N
authors.lastname: Cutfield
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002150:Caloric Tests; D005260:Female; D064087:Head Impulse Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000175:diagnosis*; D011446:Prospective Studies
keywords: DHI; MRI; caloric testing; canal paresis; vestibular schwannoma; video head impulse test