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Measurement of the Hand Transmitted Vibration of the Human Hand Arm System During Operation of a Hand Tractor
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A novel photonumeric hand grading scale for hand rejuvenation.

Jong Hun Lee1, Yean Su Choi2, Eun Soo Park2

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A new Hand Volume Rating Scale (HVRS) precisely measures dorsal hand volume changes and skin texture. This validated scale reliably distinguishes clinically significant differences, aiding in quantitative assessments.

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Area of Science:

  • Plastic Surgery
  • Medical Imaging
  • Quantitative Assessment

Background:

  • Limited scales exist for evaluating hand volume changes.
  • Need for a quantitative tool to assess dorsal hand volume and skin texture.

Purpose of the Study:

  • Develop a novel Hand Volume Rating Scale (HVRS).
  • Validate the HVRS for precision and reproducibility.
  • Confirm clinical significance of scale grades.

Main Methods:

  • Scale developed by 5 plastic surgeons, rated 91 images.
  • Validation by 5 different surgeons using 50 images.
  • Intra- and inter-rater reliability assessed using kappa statistics and ICCs.

Main Results:

  • Excellent inter-rater reliability (ICCs of 0.94).
  • High intra-rater agreement (0.95).
  • Scale accurately reflected clinically relevant differences between grades.

Conclusions:

  • The Hand Volume Rating Scale (HVRS) is precise and reproducible.
  • The HVRS effectively differentiates clinically significant hand volume changes.