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Related Experiment Videos

Reliability of sensory threshold measurement using a digital vibrogram.

B K Grunert1, J J Wertsch, H S Matloub

  • 1Department of Plastic and Reconstructive Surgery, Medical College of Wisconsin, Milwaukee 53226.

Journal of Occupational Medicine. : Official Publication of the Industrial Medical Association
|February 1, 1990
PubMed
Summary
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A digital vibrogram reliably assesses vibratory sensation thresholds for diagnosing nerve compression. Including a practice trial enhances the test-retest reliability of this clinical tool.

Area of Science:

  • Neurology
  • Clinical Neurophysiology

Background:

  • Loss of vibratory sensation is an early indicator for diagnosing compression neuropathies.
  • Digital vibrograms evaluate vibratory sensation thresholds across frequencies (8-500 Hz).
  • Limited data exists on the test-retest reliability of vibrogram thresholds.

Purpose of the Study:

  • To assess the test-retest reliability of digital vibrogram measurements.
  • To determine if an initial practice trial improves reliability.

Main Methods:

  • Evaluated 76 hands (32 normal, 44 suspected carpal tunnel syndrome).
  • Obtained average sensory thresholds for vibratory sensation onset and cessation.
  • Computed Pearson product-moment correlation coefficients.

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Main Results:

  • Test-retest reliability improved when an initial practice trial was administered.
  • Pearson correlation coefficients indicated enhanced reliability with a practice trial.

Conclusions:

  • The digital vibrogram is a reliable clinical assessment tool for vibratory sensation.
  • Incorporating a practice trial is recommended for standard vibrogram administration.