Clinical Report: Assessment of a Portable Video Head Impulse Testing System

Overview

This study evaluates a portable video head impulse testing (vHIT) system using an iPod touch and a custom 3D-printed oral stabilization mount. The portable system demonstrated a mean laterality difference of 0.453, compared to 0.518 for a medical-grade device, with a between-device difference of -0.065 (95% CI: -0.149 to 0.018).

Background

Video head impulse testing (vHIT) is crucial for assessing vestibular function, particularly in patients with suspected unilateral vestibular hypofunction. Access to quantitative vestibular testing is often limited due to equipment costs and availability.

Data Highlights

Key Findings

• The portable vHIT system detected laterality in unilateral vestibular hypofunction.
• Mean laterality difference was 0.518 for the medical-grade device and 0.453 for the portable system.
• The between-device difference was -0.065, supporting noninferiority.
• In healthy volunteers, the false-positive rate was 0% for the medical-grade device and 14.3% for the portable system.
• Bland–Altman analysis showed a bias of -0.065 with limits of agreement from -0.337 to 0.207.

Clinical Implications

Further studies are needed to refine quality control and improve individual-ear agreement.

Conclusion

The portable vHIT system meets noninferiority criteria compared to a medical-grade device. Larger studies are warranted to further validate these findings.

Related Resources & Content

1. American Academy of Audiology Clinical Consensus Statement: Assessment of Vestibular Function in the Pediatric Population - PMC
2. Sensitivity and specificity of the video head impulse test in the diagnosis of vestibular migraine – A systematic review and meta-analysis - PMC
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7. American Academy of Audiology Clinical Consensus Statement: Assessment of Vestibular Function in the Pediatric Population - PMC
8. Sensitivity and specificity of the video head impulse test in the diagnosis of vestibular migraine – A systematic review and meta-analysis - PMC
9. The effect of camera side on the VOR gain in video head impulse test - Mingwei Xu, Qin Zhang, Qiong Wu, Yuan Yao, Tianyu Gong, Jun Yang, Yulian Jin, Mengyun Fan, Jose A Lopez-Escamez, Qing Zhang, 2025