Related Experiment Video
Updated: Jun 25, 2025
Testing of all Six Semicircular Canals with Video Head Impulse Test Systems
Published on: April 18, 2019
Comparing Video Head Impulse Testing With Rotary Chair in Pediatric Patients: A Controlled Trial
Guangwei Zhou1,2, Alice Yun1, Alicia Wang1
1Boston Children's Hospital, Boston, Massachusetts, USA.
Insights
Video head impulse testing (VHIT) effectively detects lateral semicircular canal vestibular loss in children. However, its sensitivity is lower than rotary chair testing, indicating a potential limitation for vertical canal dysfunction assessment.
Area of Science:
- Pediatric Vestibular Assessment
- Oculomotor Function
- Neuro-otology
Background:
- Vestibular dysfunction in children can significantly impact development and quality of life.
- Accurate diagnostic tools are crucial for timely intervention in pediatric vestibular disorders.
- Rotary chair testing is a standard but time-consuming method for assessing vestibular function.
Purpose of the Study:
- To evaluate the efficacy of video head impulse testing (VHIT) in identifying vestibular loss in pediatric patients.
- To compare VHIT performance against rotary chair testing in children with abnormal vestibular function.
- To determine the diagnostic accuracy of VHIT for detecting vestibular impairment in a pediatric cohort.
Main Methods:
- Prospective, nonrandomized, controlled trial conducted at a tertiary children's hospital.
- Recruitment of 37 pediatric patients (3-18 years) undergoing both VHIT and rotary chair testing.
- Comparison of VHIT results between an experimental group (vestibular symptoms, abnormal rotary chair) and a control group (no symptoms, normal rotary chair).
Main Results:
- VHIT showed significantly reduced lateral semicircular canal gain in the experimental group compared to controls (P < .005).
- A VHIT lateral canal gain <0.85 or corrective saccades yielded 100% specificity and positive predictive value for vestibular loss.
- Sensitivity was 69.6% and negative predictive value was 66.7%, indicating limitations in detecting all cases.
Conclusions:
- VHIT is a valuable tool for detecting lateral semicircular canal impairment in children.
- The sensitivity of VHIT is limited when compared to rotary chair testing for pediatric vestibular assessment.
- Further research is needed to clarify the role of VHIT in diagnosing vertical canal dysfunction in pediatric patients.
Objectives:
To investigate the efficacy of video head impulse testing (VHIT) in detecting vestibular loss in pediatric patients with abnormal rotary chair testing, compared to a control group with normal rotary chair testing.
Study Design:
Prospective, nonrandomized, controlled trial.
Setting:
Pediatric vestibular program at tertiary level children's hospital.
Methods:
Patients 3 to 18 years of age were recruited to undergo VHIT and rotary chair testing between September 2015 and November 2022. VHIT results were compared between an experimental group of 23 patients with vestibular symptoms and abnormal rotary chair testing results versus a control group of 14 patients without vestibular symptoms and with normal rotary chair testing results.
Results:
The experimental group demonstrated reduced mean VHIT gain for the lateral semicircular canals (right = 0.83; left = 0.75) relative to the control group (right = 1.04, P = .005; left = 0.98, P < .001), but there was no significant difference between groups in superior and posterior canal responses. Among controls, there were no significant differences in mean gain values for each canal plane between age groups (3-7, 8-12, and 13-18 years) or between genders. A VHIT lateral canal gain value <0.85 and/or corrective saccades demonstrated 100% specificity and 100% positive predictive value for detecting vestibular loss on rotary chair, but only 69.6% sensitivity and 66.7% negative predictive value.
Conclusion:
VHIT is a useful test for detecting impairment of the lateral semicircular canals in children, though its sensitivity is limited relative to rotary chair. Its role in detecting vertical canal dysfunction in pediatric patients may be more limited and warrants further study.
