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    Wyświetlanie 1-6 z 6
    Tytuł:
    Ergonomic Risk Factors for Cumulative Trauma Disorders in VDU Operators
    Autorzy:
    Turhan, N.
    Akat, C.
    Akyuz, M.
    Cakci, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89783.pdf
    Data publikacji:
    2008
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    VDU operators
    cumulative trauma disorders
    ergonomics
    posture
    Opis:
    The objectives of this study were to investigate the rate of cumulative trauma disorders (CTDs) in the upper body and to describe the associations of such disorders with ergonomic parameters in a group of data entry operators. A total of 173 data entry operators volunteered to take part in the study. Questionnaires were used to investigate their medical history. Diagnoses of CTDs were made with clinical tests. A visual posture analysis of the workers and an ergonomic analysis of workstations and workload were used to reveal risk factors. Neck and shoulder pain, extensor tendonitis of the wrists and De Quervain’s disease were common in the study population. An assessment of risk factors showed that leaning wrists on the keyboard, hard keystrokes, extreme wrist joint and thumb positions and working in poor ergonomic design were correlated to pain and development of CTDs.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2008, 14, 4; 417-422
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Grip Force Using Electromyograms in Isometric Isotonic Conditions
    Autorzy:
    Claudon, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/91101.pdf
    Data publikacji:
    1998
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    cumulative trauma disorders
    biomechanical stresses
    upper limb
    kończyna górna
    biomechanika
    nadgarstek
    Opis:
    The purpose of this study was to develop a relationship to evaluate the grip force (forcerel) using the electromyogram (EMGrel) of the flexor digitorum superficialis (FDS) and of the extensor digitorum (ED) according to the flexion-extension wrist angle (0t-e) and to the pronation-supination forearm angle (0p-s). Fifteen participants had to exert 3 levels of grip forces in 4 positions of the wrist combined with 3 positions of the forearm. The relationship is: forcerel = 0.0045 • 0t-e • EMGrel(FDS) + 0.48 • EMGrel(FDS)-0.0014 • 0t-e • EMGrel(ED) -0 .0016 • 0p-s • EMGrel(ED) • 0.4- EMGrel(ED) This relationship can be used to estimate grip force for levels of strength lower than 50% of the maximal voluntary contraction.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 1998, 4, 2; 169-184
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electromyographic Analysis of a Repetitive Hand Gripping Task
    Autorzy:
    Cook, T.
    Rosecrance, J.
    Zimmermann, C.
    Gerleman, D.
    Ludewig, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/91061.pdf
    Data publikacji:
    1998
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    electromyography
    cumulative trauma disorders
    work-rest cycle
    muscle force
    hand gripping
    elektromiografia
    siła mięśni
    cykl pracy
    kończyna górna
    Opis:
    Electromyography (EMG) has been proposed as a method for determining muscle effort in repetitive upper limb tasks, which are often related to cumulative trauma disorders. EMG activity of the finger flexor musculature was investigated during a repetitive hand gripping task having 5 different cycle durations (2 to 6 s), various percentage of work time (and rest) within the work cycle (20% to 80%), and 3 different grip force levels. Thirty healthy adult participants each performed 27 randomly ordered 30-s repetitive hand gripping trials as well as 3 isometric contractions, which were used to normalize data from the hand gripping trials. There was a significant decrease in mean EMG as the duration of the work-rest cycle time increased. At each force level, EMG increased as the percentage of work time within the work-rest cycle increased, but to a greater extent at the highest force level. The results of this study suggest that overall muscle effort, and perhaps muscle fatigue, can be reduced most effectively by modifying the force requirements of the repetitive task. Other variables, such as the percentage of work time within a cycle and overall work cycle time have less effect on the EMG activity level. The results of this study have implications for developing strategies to reduce muscle fatigue during repetitive hand gripping tasks in an effort to reduce the effects of cumulative trauma disorders.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 1998, 4, 2; 185-198
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relevance of the EMG/Grip Relationship in Isometric Anisotonic Conditions
    Autorzy:
    Claudon, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/91069.pdf
    Data publikacji:
    2003
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    cumulative trauma disorders
    upper limb
    electromyogram (EMG)
    force
    isometric contraction
    anisotonic contraction
    schorzenia kończyn górnych
    uraz kończyny górnej
    kończyna górna
    nadgarstek
    ręka
    Opis:
    The aim of the present study was to develop a relationship to evaluate grip force using the electromyogram (EMG) in isometric anisotonic conditions. The EMGs of the flexor digitorum superficialis (FDS) and the extensor digitorum (ED) were recorded in 3 flexion-extension positions of the wrist (30° flexion, 30° extension, and 60° extension) associated with 3 positions of the forearm (70° pronation, prono-supination, and 70° supination). For each position, the participants had to follow linear ramp targets (2 rates of increase and decrease) displayed on an oscilloscope. The results show the best fit is a quadratic type force-EMG relationship. Some aspects such as the rate of force variation and the forearm and wrist positions are then discussed along with the limitations of the relationship.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2003, 9, 2; 121-134
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Relationships Between Biomechanical and Postural Stresses, Musculoskeletal Injury Rates, and Perceived Body Discomfort Experienced by Industrial Workers: A Field Study
    Autorzy:
    Stuebbe, P.
    Genaidy, A.
    Karwowski, W.
    Kwon, Y. G.
    Alhemood, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/90964.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    musculosceletal injury
    ergonomics
    postural stress
    cumulative biomechanical stress
    czynniki ryzyka
    zagrożenia zdrowia
    fizjologia pracy
    obciążenie fizyczne
    stres
    ergonomia
    choroby narządów ruchu
    pozycja przy pracy
    dyskomfort
    Opis:
    A combination of archival, subjective, and observational field data collection methods were used to investigate the relationship between biomechanical and postural stresses, and the resulting physical strain experienced by industrial workers of a packaging plant. Assessment of physical strain was based on the number and incidence rate of Occupational Safety and Health Administration (OSHA)-reportable injuries that were recorded over a period of 27 months, and based on the self-reported ratings of perceived body discomfort. Both the biomechanical and postural stresses correlated with the musculoskeletal injury rate. The results illustrate the usefulness of postural and biomechanical analyses for assessing the risk of injury in industry.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 2; 259-280
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ergonomic Program Effectiveness: Ergonomic and Medical Intervention
    Autorzy:
    McSweeney, K. P.
    Craig, B. N.
    Congleton, J. J.
    Miller, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/89705.pdf
    Data publikacji:
    2002
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    ergonomic and medical intervention
    work-related musculoskeletal disorders (WMDs)
    cumulative trauma disorders
    occupational injury and illness
    choroby narządów ruchu
    ergonomia
    medycyna pracy
    choroba zawodowa
    zagrożenia zdrowia
    program ochrony zdrowia
    Opis:
    The implementation of a successful ergonomic and medical intervention program designed to reduce the number and severity of injuries and illnesses and the associated levels of discomfort in the workplace is presented. Because of the recent activity concerning the on-again-off-again Occupational Safety and Health Administration (OSHA) Ergonomic Program Standard questions have been raised as to the value and effectiveness of an organization’s ergonomics program. In light of these concerns, the immense cost associated with work-related injury and illness, and the related pain and suffering associated with such injuries and illnesses, it is important to present a workable and effective ergonomic and medical intervention program. The results of this applied study demonstrate that through the application of an ergonomic and medical intervention program, workplace-related injuries and illnesses can be reduced or eliminated.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2002, 8, 4; 433-449
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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