Automated head motion system improves reliability and lessens operator dependence for head impulse testing of vestibular reflexes

Grace X. Tan, Desi P. Schoo, Charles Coleman Della Santina, Mehdi A. Rahman, Nicolas S. Valentin Contreras, Chen Hsin Sun, Bryce Chiang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Deficiency of the eye-stabilizing vestibulo-ocular reflex (VOR) is a defining feature in multiple diseases of the vestibular labyrinth, which comprises the inner ear's sensors of head rotation, translation and orientation. Diagnosis of these disorders is facilitated by observation and measurement of eye movements during and after head motion. The video head impulse test has recently garnered interest as a clinical diagnostic assessment of vestibular dysfunction. In typical practice, it involves use of video-oculography goggles to measure eye movements while a clinician examiner grasps the subject's head and manually rotates it left or right at sufficient acceleration to cover ∼20 deg over ∼150 mS, reaching a peak velocity of >120 deg/S midway through the movement. Manual delivery of head impulses incurs significant trial-by-trial, inter-session and interoperator variability, which lessens the test's reliability, efficiency, safety and standardization across testing facilities. We describe application of a novel, compact and portable automated head impulse test (aHIT™) device that delivers highly repeatable head motion stimuli about axes parallel to those of the vestibular labyrinth's six semicircular canals, with programmable Gaussian and sinusoidal motion profiles at amplitudes, velocities and accelerations sufficient to test VOR function over the spectral range for which the VOR dominates other vision-stabilizing reflexes. We tested the aHIT™ on human subjects and demonstrated its high reproducibility compared to manually delivered head impulses. This device has the potential to be a valuable clinical and research tool for diagnostic evaluation and investigation of the vestibular system.

Original languageEnglish (US)
Title of host publication2017 IEEE International Symposium on Medical Measurements and Applications, MeMeA 2017 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages94-99
Number of pages6
ISBN (Electronic)9781509029839
DOIs
StatePublished - Jul 19 2017
Event12th IEEE International Symposium on Medical Measurements and Applications, MeMeA 2017 - Rochester, United States
Duration: May 7 2017May 10 2017

Other

Other12th IEEE International Symposium on Medical Measurements and Applications, MeMeA 2017
CountryUnited States
CityRochester
Period5/7/175/10/17

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Keywords

  • aHIT
  • automated head impulse test
  • head impulse test
  • vestibular system
  • vestibulo-ocular reflex

ASJC Scopus subject areas

  • Instrumentation
  • Computer Science Applications
  • Medicine (miscellaneous)

Cite this

Tan, G. X., Schoo, D. P., Della Santina, C. C., Rahman, M. A., Valentin Contreras, N. S., Sun, C. H., & Chiang, B. (2017). Automated head motion system improves reliability and lessens operator dependence for head impulse testing of vestibular reflexes. In 2017 IEEE International Symposium on Medical Measurements and Applications, MeMeA 2017 - Proceedings (pp. 94-99). [7985856] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MeMeA.2017.7985856