ISO 13091-2:2021
Mechanical vibration — Vibrotactile perception thresholds for the assessment of nerve dysfunction — Part 2: Analysis and interpretation of measurements at the fingertips
This document specifies methods and procedures for analysing and interpreting vibrotactile perception thresholds and threshold shifts. Procedures for describing statistically significant changes in vibrotactile perception thresholds are recommended.
This document is applicable to vibrotactile perception thresholds determined at the fingertips according to the provisions of ISO 13091‑1.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 Treatment of vibrotactile perception thresholds
4.1 General
4.2 Mean value of repeated measurements
4.3 Test/retest variability of threshold measurements
4.4 Treatment of unresolved errors
4.5 Treatment of suspected increase in test/retest variability
5 Calculation of threshold shift
5.1 General
5.2 Relative threshold shift
5.3 Reference threshold shift
5.4 Mean value of threshold shift
5.5 Tactogram
5.6 Consistency of threshold shifts
5.7 Mean mechanoreceptor population threshold shift
6 Interpretation of vibrotactile perception thresholds and threshold shifts
6.1 General
6.2 Measurement error and statistical significance of observed VPTs
6.3 Measurement error and statistical significance of relative threshold shifts
6.4 Vibrotactile perception thresholds for healthy persons
6.5 Deviations from the VPTs of healthy persons
6.6 Physiological and clinical implications of changes in VPTs
Annex A (informative) Vibrotactile perception thresholds for healthy persons
Annex B (informative) Implications of changes in vibration perception thresholds
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
4 Treatment of vibrotactile perception thresholds
4.1 General
4.2 Mean value of repeated measurements
4.3 Test/retest variability of threshold measurements
4.4 Treatment of unresolved errors
4.5 Treatment of suspected increase in test/retest variability
5 Calculation of threshold shift
5.1 General
5.2 Relative threshold shift
5.3 Reference threshold shift
5.4 Mean value of threshold shift
5.5 Tactogram
5.6 Consistency of threshold shifts
5.7 Mean mechanoreceptor population threshold shift
6 Interpretation of vibrotactile perception thresholds and threshold shifts
6.1 General
6.2 Measurement error and statistical significance of observed VPTs
6.3 Measurement error and statistical significance of relative threshold shifts
6.4 Vibrotactile perception thresholds for healthy persons
6.5 Deviations from the VPTs of healthy persons
6.6 Physiological and clinical implications of changes in VPTs
Annex A (informative) Vibrotactile perception thresholds for healthy persons
Annex B (informative) Implications of changes in vibration perception thresholds
Bibliography