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Related Experiment Videos

Upper extremity impairment in workers performing repetitive tasks.

P Higgs1, V L Young, M Seaton

  • 1Division of Plastic and Reconstructive Surgery, Washington University School of Medicine, St. Louis, Mo.

Plastic and Reconstructive Surgery
|October 1, 1992
PubMed
Summary
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Repetitive work tasks often lead to upper extremity impairment. Job rotation and adequate rest significantly reduce the risk of cumulative trauma disorders, highlighting a need for functional assessment.

Area of Science:

  • Occupational Health
  • Ergonomics
  • Musculoskeletal Disorders

Background:

  • Repetitive tasks in the workplace are a known risk factor for upper extremity disorders.
  • Assessing functional impairment is crucial for understanding the impact of these disorders on workers.

Purpose of the Study:

  • To determine the extent of upper extremity functional impairment in workers performing repetitive tasks.
  • To identify job-related factors contributing to impairment and evaluate the effectiveness of job rotation.

Main Methods:

  • Employed a combination of subjective worker reports (numbness, pain, weakness, swelling) and objective clinical measures.
  • Objective measures included grip/pinch strength, sensory testing (Semmes-Weinstein, vibrometer, neurometer), and physical signs (Tinel's, Phalen's).

Related Experiment Videos

  • Analyzed impairment scores in relation to job type, repetition, rest periods, and job rotation.

    • Main Results:

    • 55% of workers scored 2 or higher, and 75% scored 1 or higher on impairment scales.
    • Jobs with high repetition and minimal rest showed the highest impairment ratings.
    • Workers who rotated jobs had significantly lower impairment scores (p < 0.005) compared to single-task workers.

    Conclusions:

    • Cumulative trauma disorders are more prevalent than previously thought.
    • An overall functional impairment perspective is essential for evaluating these conditions.
    • Job rotation and task variation are effective strategies for mitigating upper extremity impairment.