TY - JOUR
T1 - Functional Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
AU - Hougaard, Dan D.
AU - Abrahamsen, Emil R.
PY - 2019/4
Y1 - 2019/4
N2 - Throughout the last decade, there has been a rapid development of existing test procedures and methods evaluating the human vestibular system. In 2009 and 2013, commercially available video Head Impulse Testing (vHIT) has enabled clinicians to examine the function of all three paired semicircular canals within the vestibular system. The vHIT test has revolutionized vestibular testing and, at many clinics and hospitals around the world, this test is now considered the most important initial test of vertiginous patients. There are several manufacturers of vHIT systems around the world. A test protocol for two of the most widespread vHIT systems, EyeSeeCam and ICS Impulse, will be presented. Included in this protocol is a description of the two different test methods termed 2D vHIT testing and 3D vHIT testing. The vHIT system includes a lightweight goggle with accompanying software. The test is fast (5-10 min) and can be done with minimal discomfort to the person being examined. However, there are many steps of the test, and each of these steps may alter the final test results, if the individual steps of the test are not performed correctly. It is therefore of paramount importance that the examiner is familiar with the potential noise and/or artifact triggers. Systematic training of future examiners before performing vHIT in a clinical setting and compliance with this protocol may minimize these challenges of the test. The vHIT test is not just a “plug and play” test. However, if carried out correctly, this test offers excellent objective assessment of the function of the high frequency domain of the vestibular system. It has a very high positive predictive value and offers a specificity very close to one hundred percent.
AB - Throughout the last decade, there has been a rapid development of existing test procedures and methods evaluating the human vestibular system. In 2009 and 2013, commercially available video Head Impulse Testing (vHIT) has enabled clinicians to examine the function of all three paired semicircular canals within the vestibular system. The vHIT test has revolutionized vestibular testing and, at many clinics and hospitals around the world, this test is now considered the most important initial test of vertiginous patients. There are several manufacturers of vHIT systems around the world. A test protocol for two of the most widespread vHIT systems, EyeSeeCam and ICS Impulse, will be presented. Included in this protocol is a description of the two different test methods termed 2D vHIT testing and 3D vHIT testing. The vHIT system includes a lightweight goggle with accompanying software. The test is fast (5-10 min) and can be done with minimal discomfort to the person being examined. However, there are many steps of the test, and each of these steps may alter the final test results, if the individual steps of the test are not performed correctly. It is therefore of paramount importance that the examiner is familiar with the potential noise and/or artifact triggers. Systematic training of future examiners before performing vHIT in a clinical setting and compliance with this protocol may minimize these challenges of the test. The vHIT test is not just a “plug and play” test. However, if carried out correctly, this test offers excellent objective assessment of the function of the high frequency domain of the vestibular system. It has a very high positive predictive value and offers a specificity very close to one hundred percent.
KW - Medicine
KW - Vestibular testing
KW - semicircular canal
KW - vestibular-ocular reflex
KW - VOR
KW - video head impulse test
KW - EyeSeeCam
KW - ICS Impulse
KW - 2D head impulse test
KW - 3D head impulse test
KW - 2D head impulse test
KW - 3D head impulse test
KW - Behavior
KW - EyeSeeCam
KW - ICS impulse
KW - Issue 146
KW - Semicircular canal
KW - Vestibular testing
KW - Vestibular-ocular reflex
KW - Video head impulse test
KW - VOR
UR - https://www.jove.com/video/59012
UR - http://www.scopus.com/inward/record.url?scp=85065646344&partnerID=8YFLogxK
U2 - 10.3791/59012
DO - 10.3791/59012
M3 - Journal article
SN - 1940-087X
SP - 1
EP - 14
JO - Journal of Visualized Experiments
JF - Journal of Visualized Experiments
IS - 146
M1 - e59012
ER -