• Piotr Pietkiewicz, Jaroslaw Milonski, Marzena Bielinska, and Jurek Olszewski.
• Department of Otolaryngology, Laryngological Oncology, Audiology and Phoniatrics, Medical University of Lodz, Lodz, Poland.
• Arch Med Sci. 2020 Jan 1; 16 (1): 124-128.

IntroductionThe aim of this work was to assess SCC function in VHIT test, using both versions of VHIT ULMER.Material And MethodsThe study was performed in 57 subjects aged 22-33 years (48 women and 9 men) without vertigo in anamnesis. Patients did not complain of any "vertigo" ailments or any balance disorder incidents in the past. All tests using either VHIT I or VHIT II were performed by the same person. The function of lateral SCC in VHIT ULMER II was examined similarly like in VHIT ULMER I. In both methods was used the same sensitivity threshold parameters for horizontal and vertical accelerations (horizontal - 2500, vertical - 1600). Each of these sequences enables a parameter, called represented GAIN, to be calculated in form of a point on the canalogram.ResultsGAIN represents the deviation of the gaze in comparison to the deviation of the head between the first (t - 0 ms) and the fourth image (t = 120 ms). The calculation formula is: GAIN (in %) =100 x DG/RH. DG is deviation of the gaze ("gaze velocity in space") and RH is rotation of the head ("head velocity or impulse canal paresis"). Normal GAIN value ranges 1-40%.ConclusionsThe examination using VHIT ULMER II appears to be a more sensitive diagnostic method than VHIT ULMER I. Improved software with automated functions such as camera adjustments, examination surface arrangement, of VHIT ULMER II, enables technician to shorten the time of examination, simultaneously providing a range of new information about the condition of oculo-vestibular system.Copyright: © 2017 Termedia & Banach.

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