Short-Term Changes in Upper Extremity Dynamic Mechanical Properties Associated with Power Hand Tool Use

Details

• Personal Author:
  Radwin RG ; Richard TG ; Sesto ME
• Description:
  This study investigated the relationship between repetitive eccentric exertions in power hand tool operation and upper limb mechanical properties including stiffness and inertial mass, and physiologic measures including localized pain, discomfort, and swelling. Tool parameters, including peak torque (3Nm and 8Nm) and torque build up time (50ms and 250ms), were controlled in a full-factorial design. Twenty-nine participants were randomly assigned to one of the four conditions and operated a pistol grip nut runner four times per minute for one house in the laboratory. And average decrease in stiffness (48%) and mass moment of inertia (80%) of the upper limb was observed immediately following pistol grip nut runner operation. A previously developed dynamic tool operator model was used to predict resulting handle force and displacement, and the conditions associated with the greatest handle force and displacement demonstrated the greatest decrease in mechanical stiffness and inertial mass, and the greatest increase in localized discomfort. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Cumulative Trauma Disorders Ergonomics Laboratories Musculoskeletal Diseases Musculoskeletal System Occupational Health Safety Workplace
• Keywords:
  Biomechanical-modeling Biomechanics Body-mechanics Cumulative-trauma Cumulative-trauma-disorders Hand-tools Human-factors-engineering Injuries Injury-prevention Laboratory-testing Muscle-contraction Muscle-function Muscle-physiology Muscle-stress Muscle-tension Muscles Muscular-disorders Musculoskeletal-system Musculoskeletal-system-disorders Physiological-factors Posture Power-tools Repetitive-work Statistical-analysis Tools Work-environment Work-operations Work-performance Work-practices Worker-health Workplace-monitoring Workplace-studies

  More +
• ISBN:
  0945289227
• Publisher:
  Human Factors and Ergonomics Society
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  OSHA Region 10 ; OSHA Region 5 ; Washington ; Wisconsin
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20027119
• Citation:
  Human Factors and Ergonomics Society 47th Annual Meeting. Santa Monica, CA: Human Factors and Ergonomics Society, 2003 Oct; :1261-1264
• Federal Fiscal Year:
  2004
• NORA Priority Area:
  Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
• Performing Organization:
  University of Wisconsin, Department of Biomedical Engineering, Madison, WI
• Peer Reviewed:
  False
• Start Date:
  19960901
• Source Full Name:
  Human Factors and Ergonomics Society 47th Annual Meeting
• End Date:
  20010831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:29cf7fb07e058a10372c2f827cdd896d6546a0a786f73ce7db03dfa598b803d4d353c9e4cda80f338454c543653758787092e06de58fed8d1eecdde2cf32f9ca
• Download URL:
  https://stacks.cdc.gov/view/cdc/197465/cdc_197465_DS1.pdf
• File Type:
  [PDF - 540.58 KB ]