2014-04-01 12:00 - Messages

Outils vibrants

Paramètres biomécaniques et sensorimoteurs affectant la réponse biodynamique du système main-bras
L'exposition aux vibrations est une préoccupation importante au regard de la prévention des troubles musculo-squelettiques aux membres supérieurs. Les vibrations main-bras sont spécifiquement reconnues pour être la cause du syndrome des vibrations, une maladie atteignant les doigts et la main en matière vasculaire, musculo-squelettique et neurosensoriel. De longues durées et de fortes intensités de vibration peuvent accélérer l'apparition des symptômes.
Cette étude, qui comporte deux volets, a servi à explorer différentes variables pouvant influencer la transmission de la vibration aux membres supérieurs tout comme le recrutement musculaire. Douze participants regroupés selon deux somatotypes (six ectomorphes et six mésomorphes) ont participé à chacun de ces volets. L'utilisation d'un pot vibrant a permis de contrôler certaines variables afin d'exposer les sujets à diverses combinaisons d'amplitude (2,5 m/s2, 5 m/s2 et 10 m/s2) et de fréquence (20, 40 et 65 Hz) de vibration pour les deux volets. La tâche des sujets consistait à maintenir la poignée instrumentée du pot vibrant pendant une période de dix secondes.

Source: http://www.irsst.qc.ca/-publication-irsst-outils-vibrants-r-815.html

Musculoskeletal Pain and Depressive Symptoms as Predictors of Trajectories in Work Ability Among Finnish Firefighters at 13-Year Follow-Up

Objective: To identify work ability trajectories among Finnish firefighters during a 13-year follow-up. We examined whether baseline musculoskeletal pain and depressive symptoms (DPS) predicted membership of the trajectories.
Methods: We studied 411 male firefighters who responded to a questionnaire at both baseline and at least one of two follow-ups. The outcome variable was perceived work ability (0 to 10). The predictors were musculoskeletal and depressive symptoms. Covariates included age, diseases, lifestyle habits, and work-related factors.
Results: One fourth of the firefighters belonged to the Diminished work ability trajectory. Musculoskeletal and depressive symptoms, lifestyle risks and diseases, and, in separate analyses, low back pain, were strong predictors of this.
Conclusions: When planning preventive actions and workplace health promotion among firefighters, even one site musculoskeletal pain and mild signs of depression should be taken into account. Prevention of adverse lifestyle habits is also essential.

Source: Punakallio, Anne PhD; Lusa, Sirpa PhD; Luukkonen, Ritva PhD; Airila, Auli MSc; Leino-Arjas, Päivi MD. Journal of Occupational & Environmental Medicine: April 2014 - Volume 56 - Issue 4 - p 367–375.
http://dx.doi.org/10.1097/JOM.0000000000000139

Evaluation of Musculoskeletal Disorders and Traumatic Injuries Among Employees at a Poultry Processing Plant

The National Institute for Occupational Safety and Health (NIOSH) has issued the final report from its Health Hazard Evaluation at a South Carolina poultry processing plant. The plant requested the Health Hazard Evaluation.
The final report makes recommendations to improve work conditions and minimize exposures to factors that increase the risk for musculoskeletal disorders and traumatic injuries. The recommendations address changes for reducing the amount of hand activity and force, changing work schedule and rotation patterns and policies, and improving work practices related to tool and equipment use. These recommendations are aimed at what is an alarming prevalence of carpal tunnel syndrome in poultry processing workers noted in this evaluation.

Source: http://www.cdc.gov/niosh/updates/upd-03-27-14_b.html/

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