Vibrotactile perception thresholds as determined by two different devices in a working population

Area of Science:

• Occupational Health
• Sensory Neuroscience
• Biomedical Engineering

Background:

• Vibrotactile perception thresholds are crucial indicators of sensory function.
• Assessing these thresholds aids in diagnosing neurological conditions and occupational exposures.
• Standardized measurement tools are essential for reliable clinical and research applications.

Purpose of the Study:

• To evaluate the agreement between a vibrameter and a tactilometer for measuring vibrotactile perception thresholds.
• To compare the diagnostic utility of these devices in individuals with and without sensorineural hand symptoms or vibration exposure.

Main Methods:

• Vibrotactile perception thresholds were measured in 178 men using a vibrameter (100 Hz) and a tactilometer (8–500 Hz).
• Agreement was assessed via correlation analysis and comparison of upper quartile thresholds.
• Sensitivity and specificity were calculated for detecting hand symptoms and vibration exposure.

Main Results:

• The correlation between the vibrameter and tactilometer was moderate (0.59 at 125 Hz).
• Agreement metrics (sensitivity/specificity) for detecting symptoms and exposure were modest for both devices.
• Combining data from multiple tactilometer frequencies did not enhance agreement.

Conclusions:

• Discrepancies between devices stem from equipment differences, procedures, examiner variability, and high inter/intra-individual variability.
• Neither the vibrameter nor the tactilometer demonstrated superiority in identifying hand symptoms or vibration exposure.
• The vibrotactile perception threshold has limited value for individual screening and diagnosis based on this study's evaluation.