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The Conventional Head Impulse Test Versus the Suppression Head Impulse Test: A Clinical Comparative Study.
1Department of Otorhinolaryngology, Audiovestibular Medicine Unit, Alexandria University Faculty of Medicine, ElAzarita, Egypt.
The Journal of International Advanced Otology
|January 31, 2023
Summary
The suppression head impulse test offers a more sensitive evaluation of vestibular function compared to the conventional head impulse test. This new paradigm aids in better assessing vestibulo-ocular reflex gain, particularly in patients with vestibular loss.
Area of Science:
- Neuroscience
- Ophthalmology
- Audiology
Background:
- The suppression head impulse test (s-HIT) is a novel clinical tool for vestibular assessment.
- Evaluating its utility is crucial for understanding vestibular function.
Purpose of the Study:
- To assess the clinical importance of the s-HIT paradigm.
- To compare s-HIT with the conventional head impulse test (HIT) in evaluating vestibular function.
Main Methods:
- A comparative study involving 95 participants (190 ears) from June 2020 to June 2022.
- Participants were categorized into vestibular weakness and healthy control groups.
- Video head impulse tests were performed using both conventional HIT and s-HIT, analyzing vestibulo-ocular reflex (VOR) gain and saccades.
Main Results:
- s-HIT demonstrated significantly lower VOR gain than HIT in both groups.
- A positive correlation was found between VOR gain measurements from both paradigms.
- Negative correlations were observed for overt saccades latency and amplitude between the two tests.
Conclusions:
- The s-HIT paradigm complements the conventional HIT for enhanced vestibular function evaluation.
- s-HIT's sensitivity to covert saccades makes it superior for VOR gain measurement, especially in patients with vestibular loss.
