• Title/Summary/Keyword: MSDs(musculoskeletal disorders)

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Musculoskeletal Symptoms and Related Factors of Caregivers of Infants (아기양육자의 근골격계증상과 위험요인에 관한 연구)

  • Kim, Su-Yeon;Lee, Dong-Gyeong;Han, Hyeon-Mi
    • Journal of the Ergonomics Society of Korea
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    • v.25 no.2
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    • pp.181-186
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    • 2006
  • MSDs(Musculoskeletal Disorders) symptoms related to infants-rearing was evaluated on 207 Korean caregivers who taking care of their infants under 36 months on January and February 2005. In Result, 77 percentages caregivers suffered from MSDs symptoms that occurred more than one time for 1 month during the last one year or last for more than one week (by NIOSH). This results shows that MSDs problems of Korean infants caregivers are very serious. Body parts complained of MSDs symptoms were low back(61%), shoulder(60%), hand/wrist(46%), neck(37%), upper back(35%). Parenting stress of the caregivers who had MSDs symptoms was significantly higher than who didn't showed MSDs symptoms.

A Study on the Safety and Health Management Policy for the Prevention of MSDS (근골격질환예방을 위한 안전보건 정책에 관한 연구)

  • 정병용;오순영
    • Journal of the Korea Safety Management & Science
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    • v.5 no.4
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    • pp.63-73
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    • 2003
  • Occupational illness analyses are used to identify common factors contributing to occupational illness and to give recommendations for illness prevention. We discuss safety and health management policies based on the present status of MSDS(Musculoskeletal Disorders) characteristics and the actual safety and health problems. These results can be used to develop more effective occupational safety and health management policies for the prevention of MSDS.

The Effects of Short Break Time and Mouse Clicks on the VDT Work by using Subjective Discomfort (VDT 작업시 짧은 휴식시간과 마우스 클릭이 주관적 불편도에 미치는 영향에 관한 연구)

  • Kim, Yu-Chang;Lee, Jun-Pal
    • Journal of the Korean Society of Safety
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    • v.23 no.2
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    • pp.30-36
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    • 2008
  • This paper suggests the best work conditions, including short break time and number of mouse clicks on a computer, to prevent MSDs(Musculoskeletal Disorders) on VDT(Visual Display Terminal) work. Discomfort measures are calculated according to the Borg's CR-10 Scale. The short break time conditions are grouped into 7, 15, and 30 seconds after every 10-minute work period and the number of mouse clicks are divided into 10 clicks/min, 20clicks/min, and 30clicks/min. The result of the ANOVA on the shift value of subjective discomfort shows the following: 1) Regarding the break time and the number of mouse clicks, there are statistical differences between the measured values for the neck and the wrist(p<0.05). 2) Regarding the number of mouse clicks, there are statistical differences between the measured values for the shoulder and the forearm(p<0.1). 3) Regarding the break time and the number of mouse clicks, there are no statistical differences between the measures values for the eyes, upper arms and back(p<0.1).

Prevention of Work-related Musculoskeletal Disorders in Grapes Pinching by Using Electro-motion Scissors Designed Ergonomically

  • Chae, Hye-Seon;Kim, Sung-Cheol;Kim, Kwan-Woo;Lee, Kyung-Suk;Kim, Hoy-Cher;Park, Keun-Sang
    • Journal of the Ergonomics Society of Korea
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    • v.30 no.6
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    • pp.749-755
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    • 2011
  • Objective: The purpose of this study is to assess the reducing effect of workload on developed electro-motion scissors. Methods: To achieve this, we measured the pressure distribution, Joint angle of fingers and JSI(Job Strain Index) for electro-motion scissors and hand-operated scissor in objective assessment and surveyed the uncomfortable degree in subjective assessment. Results: As a result, The peak of pressure in the electro-motion scissors was generally lower than the hand-operated scissors. JSI and overall joint angle of fingers for the electro-motion scissors were remarkably lower than the hand-operated scissors. Also, the subjective uncomfortable degree showed that the uncomfortable point of electro-motion scissors were generally lower than the hand operated scissors. Conclusion: The impact of reducing the work load as well as distributing the pressure around the hand by using electro-motion scissors during grapes pinching was confirmed.

A study on Job Stress and MSDs(Musculoskeletal Disorders) of Workers at Automobile Manufacturing Industry (자동차 제조업 근로자의 직무스트레스와 근골격계질환 자각증상에 대한 연구)

  • Choi, Soon-Young;Kim, Hyun-Sung;Kim, Tae-Heon;Park, Dong-Hyun
    • Journal of the Korean Society of Safety
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    • v.20 no.3 s.71
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    • pp.202-211
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    • 2005
  • Musculoskeletal Disorders(MSDs) have been a growing problems with higher incidence rate every year. The 65% of all work-related diseases in the US has been MSDs since the middle of the 90s according to BLS(Bureau of Labor Statistics, 1995). The MSDs in Korea has been increased in recent 10 years as well. This study has tried to focus on job stress associated with MSDs that has not been usually studied before. Specifically job stress of workers at automobile manufacturing industry and relationship between job stress and symptoms of MSDs have been major concerns in this study. The workers had higher stress with longer working experience, longer working hours, and worse working environment. The job stress had strong association with the symptoms at hand, wrist and low back. Specifically, job stress factors such as job requirement and job future ambiguity had more effects on the symptoms of MSDs.

A Survey on the Laws and Regulations of Musculoskeletal Disorders in Various Countries (국가별 근골격계질환 관련법 및 규정 고찰)

  • Kee, Do-Hyung;Jung, Hwa-Shik;Park, Jae-Hee;Lee, In-Seok
    • Journal of the Korea Safety Management & Science
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    • v.11 no.2
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    • pp.69-75
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    • 2009
  • This paper was proposed to show the comprehensive review of laws and regulations on the musculoskeletal disorders (MSDs) that are being established and carried out in various countries. Ten countries including USA, Canada, Australia, Japan, and 6 European countries which were regarded as the leaders in the prevention of MSDs were selected for review. Comparative analysis were performed on the laws, regulations, and guidelines of MSDs among different countries. The purpose of this study was to investigate the status of the various efforts of the advanced countries concerning on preventing MSDs and suggest the improvement factors that might be introducible to Korean policies. Some recommendations were made to improve the appropriateness and efficiency of our MSDs prevention policies based on the comprehensive review and comparative analysis. It is expected that the results of this study would be used as valuable information when revising relevant legal system.

An Ergonomic Analysis on Working Posture Associated with Dental Treatment Using Indirect Viewing Method (간접보기 도구를 이용한 치과 진료 관련 작업자세에 대한 인간공학적 분석)

  • Son, Chang-Won;Choi, Soon-Young;Park, Dong-Hyun
    • Journal of the Korea Safety Management & Science
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    • v.12 no.2
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    • pp.55-64
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    • 2010
  • This study tried to focus on nontraditional job that has not been studied in terms of the subjects associated with MSDs(Musculoskeletal Disorders). Specifically, dental procedure was the job to be analyzed in this study. An alternative method as well as a traditional method for viewing teeth while performing simulated dental procedures. Four graduated students did both methods(direct view and indirect view) as the subjects in this study. The method based on indirect view used a video camera and monitor to view the teeth. The experiment was conducted five times for each subject. The major findings in this study were as follows; 1) Job speed was increased with the repetitions for both methods, 2) Difference of Neck flexion between direct and indirect methods was statistically siginificant(Neck flexion for indirect method was dramatically decreased), 3) Difference of job speed between direct and indirect methods was statistically significant(Job speed for direct method was faster than that of indirect method), 4) Difference of error rate between direct and indirect methods was statistically significant(error rate for direct method was lower than that of indirect method), 5) Even though indirect method did not provide better performance in terms of job speed and error rate yet, it seemed to need a trade-off between two methods in the future since indirect method provided better working postures than that of direct method.

A Study on the Relationship between Job Stress and Subjective Symptoms Associated with Musculoskeletal Disorders of the Workers at Automobile Manufacturing Industry (자동차산업 근로자의 직무스트레스와 근골격계질환 자각증상과의 연관성)

  • Kim, Hyunsung;Choi, Soonyoung;Kang, Sukho;Park, Donghyun
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.16 no.3
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    • pp.264-275
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    • 2006
  • MSDs(Musculoskeletal Disorders) and Job Stress have been recognized as one of major problems in industry these days according to the results of most industrial health/safety studies. Specifically, MSDs have been growing problems in Korea as well as in US and European countries with higher incidence rate every year. This study tries to understand characteristics of job stress and association between MSDs and job stress for the workers at automobile manufacturing industry. This study also tries to understand the differences in terms of job stress between white collar and blue collar workers. The results showed that there was definite association between symptoms of MSDs and some of major job stress factors. However, there were big differences in terms of associations between two groups(white collar and blue collar workers). The first group(white collar workers) showed more associations between symptoms of MSDs and some of major job stress factors than that of the second group(blue collar workers) although symptom rate of the second group was higher than that of the first group. It could be concluded that symptoms of the first group had more effects from job stress while symptoms of the second group had more effects from typical job risk factors based on the results of the study.

A study on determination of working posture to be analyzed during MSDs evaluation (근골격계질환 위험도 평가 관련 문제 작업 자세 결정에 관한 연구)

  • Noh, An-Na;Choi, Seo-Yeon;Park, Dong-Hyun
    • Journal of the Korea Safety Management & Science
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    • v.17 no.3
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    • pp.133-141
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    • 2015
  • This study tried to identify the problems associated with the posture to be analyzed and tried to suggest guidelines for MSDs(Musculoskeletal Disorders) evaluation based on working posture. A total of 50 jobs from 3 different types of industries(electronics, hospitals, automobiles) were used for MSDs evaluation study which was done by 6 observers. Two indexes were applied to identify the problem in this study which were percentage of agreement and counter-time-error rate. Specifically, 'counter-time-error rate' represented a degree of consistency in terms of selecting the posture to be analyzed time after time. Main results of the study were as follows; 1) The average percentage of agreement for representative posture for whole body was relatively higher than that for representative postures for individual body parts, 2) The counter-time-error rate(%) has been reduced as the evaluation process has repeated for the same job. 3) The counter-time-error rate(%) for electronics, hospitals, and automobiles were 63.4%, 61.2%, and 67.3% respectively. 4) The counter-time-error rate(%) for the job with the work cycle of 0.5 to 2 minutes were lower than that of the jobs with the work cycles less than 0.5 minute or greater than 2 minute. 5) The work cycles and the number of trials had significant effects on counter-time-error rate while the types of industries did not have significant effects on counter-time-error rate. Some guidelines could be prepared from the results of the study. Probably, there should have an extension in terms of form and matter for this study in order to have more practical output.

The sensitivity analysis for ergonomic checklists associated with musculoskeletal disorders (근골격계질환 위험도관련 주요 평가도구들에 대한 민감도 분석)

  • Im, Su-Jung;Choi, Soon-Young;Park, Dong-Hyun
    • Proceedings of the Safety Management and Science Conference
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    • 2011.04a
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    • pp.319-328
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    • 2011
  • It has been very important to have an exact evaluation for risk factors in order to prevent MSDs(Musculoskeletal Disorders). However, most MSDs evaluation checklists have always been some problems of possibilities associated with subjective evaluation. Therefore, this study tried to conduct a sort of sensitivity analysis on three major evaluation checklists(OWAS, RULA, REBA). Specifically, major subjects in the study consisted of three parts as follows; comparison of the results between experienced and inexperienced subjects, analysis for the consistency of the results in terms of different evaluation times. The results of the study were summarized as follows; 1) There was statistically significant difference of the results by RULA and by REBA between experienced and inexperienced subjects. This might due to the fact that experienced subjects have had better ability to detect the bad working posture during evaluation. However, the results by OWAS did not give any significantly different results between experienced and inexperienced subjects., 2) All three checklists showed significantly different results in terms of different evaluation times. Further study on this subject would eventually provide a sophisticated evaluating guidelines for MSDs regarding determination of subject-specific evaluation, identification of repetitive number of evaluations for stable results for each checklist, determination of job-specific evaluation methods, and so on.

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