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Standard Quality Control Testing, Virus Penetration, and Glove Durability
Published in Robert N. Phalen, Howard I. Maibach, Protective Gloves for Occupational Use, 2023
Other findings have implications for the design and conduct of cyclic fatigue tests, especially in terms of the correctness of simulating actual clinical tasks. Powell et al.70 were concerned about the impact of glove fit on the progression of transient hand discomfort to a cumulative trauma disorder (CTD). Their experimental design was to have dental hygienists (n = 176) successively don an appropriately sized ambidextrous glove and have the first-to-the-fourth interknuckle distance measured while simulating prehensile grasp of an instrument; then repeat the procedure with a fitted glove. Although the Powell et al. results do not lead to a position about cyclic fatigue of glove material per se, their results contribute to a better understanding of the difference in relative risk of crack nucleation (or propagation) between ambidextrous and fitted examination gloves. Their compressive force calculations suggest that the ambidextrous gloves impose a 32.7% additional load onto the material area of concern as compared to their paired, fitted counterparts. They found that the percent elongation across the knuckles of an ambidextrous glove—with the hand in prehension—was 32.9% greater than that measured across a fitted glove (α > 0.9999).
The wrist
Published in Ashley W. Blom, David Warwick, Michael R. Whitehouse, Apley and Solomon’s System of Orthopaedics and Trauma, 2017
Inappropriate terms such as repetitive stress injury and cumulative trauma disorder have been used in the past for a controversial syndrome comprising ill-defined and unusually disabling pain around the wrist and forearm (and sometimes the entire limb) which is usually ascribed to a particular work practice. There is no good evidence to suggest that using the hands causes harm – after all, training makes muscles and tendons less vulnerable to damage. Exceptions include excessive vibration which can lead to carpal tunnel syndrome and hand–arm vibration syndrome (neurological damage to the fine nerves supplying the fingertips and Raynaud’s phenomenon). Other defined and treatable conditions such as carpal tunnel syndrome, thumb base arthritis, tenosynovitis from sudden unaccustomed use and de Quervain’s should be excluded and treated accordingly. Epidemiological studies suggest that these conditions are no more common among keyboard operators than in the general population. What has fuelled the controversy surrounding the ‘occupational’ disorders is their apparent severity and intractability compared with other types of overuse syndrome and the potential rewards for successful litigation. There are often social and psychological aspects which confound the picture. The term ‘work-relevant upper limb disorder’ is preferred as it acknowledges that the symptoms are noticed at work but it does not imply causation.
Occupational Medicine for the Pain Practitioner
Published in Mark V. Boswell, B. Eliot Cole, Weiner's Pain Management, 2005
Repetitive motion injury (RMI) has previously been termed “repetitive strain injury” (RSI) and also “cumulative trauma disorder” (CTD). Nationally, the Bureau of Labor Statistics calls these conditions “illnesses” and not injuries. OSHA (Occupational Safety and Health Administration), NIOSH (National Institute of Occupational Safety and Health), and the National Academy of Science have replaced these terms with the more neutral “work related musculo-skeletal disorders.”
Measuring static muscular strength among female operatives: a cross-sectional comparison in different handicraft occupations
Published in International Journal of Occupational Safety and Ergonomics, 2021
Ashish Kumar Singh, Makkhan Lal Meena, Himanshu Chaudhary
Handicraft manufacturing is a traditional artistic activity and shares some common work characteristics such as the involvement of the lower arm, hand–eye coordination and fine dexterity of the worker [1]. Depending on the nature of the job and design of the hand tool, handicraft operatives can be exposed to awkward posture, forceful gripping, high repetitiveness and hand–arm vibration (HAV) hazard. These variables are directly associated with the symptoms of cumulative trauma disorder (CTD) [2–5]. Safety guidelines for the upper extremities could prevent workplace injuries and reduce the risk of CTD [6]. This research is concerned with the relative causes for the loss of static strength that are associated with holding a poorly designed hand tool or materials against a mechanical process.
A comparative assessment of static muscular strength among female operative’s working in different handicraft occupations in India
Published in Health Care for Women International, 2019
Ashish Kumar Singh, Makkhan Lal Meena, Himanshu Chaudhary, Govind Sharan Dangayach
The weaving of a carpet usually takes several months, depending upon the size, and as per urgency of the customer. Weaving requires enormous concentration and long duration of sitting. Long hours of same squat posture could cause musculoskeletal disorders in different body regions. The process requires repetitive movement of digits and wrist that could be directly associated with cumulative trauma disorder (Singh et al., 2018a).
The Modified Strain Index: A Composite Measure of Injury Risk for Signers
Published in Journal of Motor Behavior, 2021
Gretchen Roman, Daniel S. Peterson, Edward Ofori, Meghan E. Vidt
Past work diverges on the rank order of UE biomechanics and identification of the greatest contributors to pain and injury of those involved in repetitive high-risk tasks. Pace of finger/hand movement, rest breaks per minute, hand and wrist deviations, and excursions from optimal work envelope were ranked using greatest to least significant t-test statistic (Feuerstein & Fitzgerald, 1992). Intensity of exertion, hand and wrist posture, speed of work, duration of exertion, efforts per minute, and duration of task per day were ranked from greatest to least important based on professional judgment (Moore & Garg, 1995). In this study, ballistic signing demonstrated predictability of and association with pain intensity, therefore it was deemed to be the most critical factor, like intensity of exertion in development of the original SI. Otherwise, this work found duration of exertion, superior-inferior and medial-lateral work envelope, non-neutral joint angle, and muscle activation were ranked using greatest to least significant f-test statistic. This work replicated the same most significant biomechanical measures as Feuerstein and Fitzgerald (1992), as ballistic signing is analogous to pace of finger/hand movement and duration of exertion is analogous to rest breaks per minute. The Occupational Health and Safety for Sign Language Interpreters (Woodcock & Fischer, 2008) encourages the use of ‘micro’ rest breaks to reduce the frequency of hand movements, slow the pace, and help reduce musculoskeletal injuries. Additionally, this work replicated the same most significant biomechanical measure as Schoenmarklin et al. (1994), who identified acceleration as the primary risk factor associated with cumulative trauma disorder in industrial workers. More work is needed to determine which of the previously identified biomechanical tasks unique to signers (Feuerstein & Fitzgerald, 1992; Rochester Institute of Technology (RIT) & National Technical Institute for the Deaf, 2005; Roman, 2018) has the greatest contribution when determining injury risk, so that further evidence-based adjustments can be made to enhance robustness of the modified SI.