Field Application and Evaluation of the ACGIH Hand Activity Level TLV®

ACGIH Hand Activity Level TLV®의 현장 적용 및 평가

  • Kim, Boo Wook (Center for Occupational Lung Diseases, Workers Accident Medical Corporation) ;
  • Woo, Ji Hoon (Wonjin Institute for Occupational and Environmental Health) ;
  • Kang, Dongmug (Department of Preventive and Occupational Medicine, Pusan National University) ;
  • Shin, Yong Chul (Department of Occupational Health and Safety Engineering, Inje University)
  • 김부욱 (산재의료관리원 직업성폐질환연구소) ;
  • 우지훈 (노동환경건강연구소) ;
  • 강동묵 (부산대학교 의과대학 예방 및 산업의학교실) ;
  • 신용철 (인제대학교 보건안전공학과)
  • Received : 2006.03.10
  • Accepted : 2006.04.11
  • Published : 2006.06.30

Abstract

The Strain Index(SI) has been commonly used to evaluate the musculoskeletal disorders(MSDs) of upper extremities. Recently, the American Conference of Governmental Industrial Hygienists(ACGIH) adopted the Threshold Limit Value for hand activity level (HAL TLV) focused on the hand, wrist, and forearm. The MSDs risks of 37 repetitive works conducted at an automobile climate control system manufacturing factory were evaluated using both the HAL TLV and the SI, and the results by two methods were compared. Also, measured repetitive frequencies of upper limbs joint were mesured using electromyogram and electrogoniometer. The evaluation results of the HAL were related with the repetitive frequency data of upper limbs joint by electrogoniometer, and the NPF was related with %MVC of ECU. The evaluation result of HAL TLV was highly related with the SI score(r=0.66, p<0.01). Of total 37 tasks, 25 tasks(67.6%) were exceeded the TLV and 34 tasks(91.9%) exceeded the SI limit. Although there was a high relationship between the HAL TLV and SI score, the HAL TLV underestimated the risk in comparison with the SI. The correlation coefficients(r) between the HAL TLV data and the repetitive frequency of upper limbs joint were 0.45~0.55(p<0.01). The MSD symptoms was significantly different between high risk groups and low risk groups evaluated by HAL TLV(p<0.01), but was not different between two groups by SI. In conclusion, the HAL TLV is a proper tool for repetitive works.

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