Testing of all Six Semicircular Canals with Video Head Impulse Test Systems

Overview

This protocol describes the video head impulse test (vHIT) using two systems, EyeSeeCam and ICS Impulse. It aims to optimize testing techniques and highlight potential pitfalls.

Key Study Components

Area of Science

• Neuroscience
• Vestibular Function
• Clinical Testing

Background

• Video head impulse testing assesses vestibular function.
• Two systems are commonly used: 2D and 3D vHIT.
• Proper technique is crucial for accurate results.
• Potential artifacts can affect test outcomes.

Purpose of Study

• To demonstrate techniques for effective vHIT.
• To identify common pitfalls in the testing process.
• To ensure accurate assessment of all six semicircular canals.

Methods Used

• Calibration of vHIT systems before testing.
• Execution of head impulses for horizontal and vertical semicircular canals.
• Use of goggles for eye tracking during tests.
• Evaluation of test results for normal and pathological findings.

Main Results

• Normal findings indicated by matching head and eye velocity curves.
• Pathological saccades identified with low mean gain values.
• Results consistent across both vHIT systems.
• Effective techniques demonstrated for all six semicircular canals.

Conclusions

• Accurate vHIT requires proper technique and calibration.
• Low mean gain values and saccades indicate vestibular dysfunction.
• Both vHIT systems provide reliable assessments when used correctly.

Frequently Asked Questions