Reliability and comparison of gain values with occurrence of saccades in the EyeSeeCam video head impulse test (vHIT)

Korsager, Leise Elisabeth Hviid; Schmidt, Jesper Hvass; Faber, Christian Emil; Wanscher, Jens Højberg

doi:10.1007/s00405-016-4183-2

Cited by 33 publications

(24 citation statements)

References 13 publications

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“…Present study suggests the presence of refixation saccades can be reliably and repeatedly recorded when evaluating lateral SCC but not vertical SCC. A study by Korsager et al (2016) reported better reliability for the presence of refixation saccades than the VOR gain between the clinicians; however, this was shown only for the lateral SCC. Korsager et al (2016) did not examine the test-retest reliability of LARP and RALP, the measures that assess functioning of the vertical canals on either side.…”

Section: Discussionmentioning

confidence: 94%

“…A study by Korsager et al (2016) reported better reliability for the presence of refixation saccades than the VOR gain between the clinicians; however, this was shown only for the lateral SCC. Korsager et al (2016) did not examine the test-retest reliability of LARP and RALP, the measures that assess functioning of the vertical canals on either side. Therefore, the present study may be treated as an extension to their work with more details on vertical canals in addition to the lateral canal.…”

Section: Discussionmentioning

confidence: 94%

“…For a more detailed explanation, readers may refer to Zaki et al (2013). Even though Korsager et al (2016) did use ICC as a measure of the test-retest reliability, they examined it only for the lateral SCC. The vertical canals were not assessed in their study.…”

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confidence: 99%

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Test–Retest Reliability of Video Head Impulse Test in Healthy Individuals and Individuals with Dizziness

2019

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Video head impulse test (vHIT) is widely accepted as a test for the assessment of functional integrity of semicircular canals (SCCs). It allows for the evaluation of the functioning of all six SCCs independent of each other. It works on the principle of the vestibulo-ocular reflex (VOR). In individuals with vestibular pathologies, the VOR is impaired, and hence, the use of vHIT may provide vital information about the functional status of SCCs and the VOR pathway originating from them.In the recent past, studies reported excellent test–retest reliability of vHIT in healthy individuals. However, these studies used analysis of variance or the nonparametric counterpart Wilcoxon signed-rank test, which are insufficient statistical methods for conclusions about test–retest reliability. Further, because vHIT assesses VOR function in individuals with vestibular pathologies, it is important to assess test–retest reliability in the pathological group as well. Therefore, the present study aimed to evaluate test–retest reliability of vHIT in healthy individuals and individuals with vestibular pathology.Repeated measures.Twenty healthy individuals with no history of vestibular pathology and 20 individuals with known vestibular pathology were included.Each participant underwent vHIT testing for all three SCCs of both sides on four different occasions. VOR gain and the presence of pathological saccades were noted and analyzed for each recording.Intraclass correlation coefficient (ICC) revealed excellent test–retest reliability for VOR gain in both groups (ICC ≥ 0.76). Kappa coefficient analysis for the presence of refixation saccades demonstrated moderate to excellent agreement between test sessions (K ≥ 0.63) for the lateral canal. For the anterior and posterior SCC, there was large variability between sessions for refixation saccades.This study provides evidence about test–retest reliability of VOR gain and refixation saccades assessed using vHIT in healthy individuals and individuals with vestibulopathies. These findings suggest that both measures are highly reliable and replicable across test sessions, except refixation saccades in vertical canals which varied between sessions in some individuals.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 94%

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Test–Retest Reliability of Video Head Impulse Test in Healthy Individuals and Individuals with Dizziness

2019

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“…RFS might occur during the head impulse or after the end of the head impulse and are referred to as covert and overt RFS [29]. RFSs are much more reliable than the VOR gain values in between different testers [41]. One problem is RFS, which increase in higher age without a VOR gain decrease and could clinically mimic a pathological vHIT [35].…”

Section: Video-head-impulse Test (Vhit)mentioning

confidence: 99%

Testing of the Semicircular Canal Function in Vertigo and Dizziness

Rambold¹

2017

Up to Date on Meniere's Disease

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Testing the function of the semicircular canals (SCC) in vertigo and dizziness is an important step towards a diagnosis. There are different vestibular tests available: rotatory testing, bithermal caloric irrigation (CI) and the video-head-impulse test (vHIT). This chapter describes the basic methods, the current knowledge and economic aspects focused on the vHIT and CI. After a general section, common vertigo diseases are discussed with respect to the functional tests. From this chapter, it is clear that not only one method has to be applied to test vestibular function but a battery including the CI and the vHIT in three dimensions.

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“…In a previous study, we suggested that the refixation saccades might be a better predictor of the vestibular function than gain value (5). The gain value is known to vary for a number of reasons, whereas the occurrence of saccades seems more reliable.…”

Section: Discussionmentioning

confidence: 99%

Refixation Saccades with Normal Gain Values: A Diagnostic Problem in the Video Head Impulse Test: A Case Report

et al. 2017

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Refixation saccades with normal gain value occur more frequently with increasing age. The phenomenon has also been observed in different vestibular disorders. In this case, we present a young male with normal gain value and refixation saccades tested with the video head impulse test (vHIT) the day after his cochlear implantation. One month after surgery, refixation saccades were no longer present. This suggests that refixation saccades can occur as a result of temporary pathology such as surgery. Refixation saccades with normal gain values might reflect a partial deficit in the vestibulo-ocular reflex. However, this partial deficit is in conflict with the current way of interpreting vHIT results in which the vestibular function is classified as either normal or pathological based only on the gain value. Refixation saccades, which are evident signs of vestibulopathy, are not considered in the evaluation. A new way of interpreting the vHIT based on the saccades must be considered.

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Reliability and comparison of gain values with occurrence of saccades in the EyeSeeCam video head impulse test (vHIT)

Cited by 33 publications

References 13 publications

Test–Retest Reliability of Video Head Impulse Test in Healthy Individuals and Individuals with Dizziness

Test–Retest Reliability of Video Head Impulse Test in Healthy Individuals and Individuals with Dizziness

Testing of the Semicircular Canal Function in Vertigo and Dizziness

Refixation Saccades with Normal Gain Values: A Diagnostic Problem in the Video Head Impulse Test: A Case Report

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