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Manufacturing Case Studies
Published in James P. Kohn, The Ergonomic Casebook, 2020
There are many different kinds of repetitive motion injuries. Three of the most common are known as trigger finger, carpal tunnel syndrome (CTS), and tennis elbow. All of these conditions can be painful and even debilitating.
A bi-objective model to include workers’ vibration exposure in assembly line design
Published in International Journal of Production Research, 2021
Serena Finco, Mohammed-Amine Abdous, Martina Calzavara, Daria Battini, Xavier Delorme
As defined in the introduction section, in the manufacturing sector, about 74% of workers are exposed to vibrations produced by powered hand tools (Krajnak 2018). Excessive and prolonged vibration exposures produce harmful effects on workers’ physical health. The adverse effects can be localised in a specific part of the body, or they can hit the whole body (McCallig et al. 2010). When vibrations are mainly transmitted from the tool to the hand-arm system, the so-called hand-arm vibration syndrome (HAVS) arises, by causing diseases in the upper extremities parts of the body (Bovenzi, Pinto, and Picciolo 2019). By considering the HAVS, the primary diseases can be categorised into carpal-tunnel syndrome and white finger diseases.
Electromyographic evaluation of different handle shapes of masons’ trowels
Published in International Journal of Occupational Safety and Ergonomics, 2021
Nabiollah Bakhtiari, Iman Dianat, Moein Nedaei
The human hand is an end effector of the multilink kinematic chain of the body, and thus a change in position of any of the proximal segments may have an influence on the force produced by the hand and fingers [1]. In many daily and occupational activities, frequent use of the hands may lead to numerous musculoskeletal disorders (MSDs) and injuries (e.g., de Quervain’s tenosynovitis, trigger finger, ganglionic cysts, hand-arm vibration syndrome, BlackBerry thumb) [2–4]. Hand disorders account for approximately 33% of all work injuries, 25% of lost work time and 20% of permanent disabilities [3,5].