2013-10-01 12:00 - Messages

Dossier « TMS dans l’agroalimentaire. Nourrir sans dépérir »

Le secteur de l'agroalimentaire en France est, depuis de nombreuses années, l'un des plus exposés aux risques de lombalgies et de troubles musculosquelettiques. De nombreuses entreprises se sont lancées dans des réflexions sur les postes, les tâches et l'organisation du travail, analyses ergonomiques, travail au froid… Retour sur les constats et les pistes d'actions explorés par le réseau Assurance maladie Risques professionnels.

Source : Travail & Sécurité, octobre 2013.
http://www.inrs.fr/accueil/header/actualites/sommaire-travail-securite-octobre-2013.html

Effect of systematic ergonomic hazard identification and control implementation on musculoskeletal disorder and injury risk

Objectives: This study aimed to examine the effect of an ergonomic hazard control (HC) initiative, undertaken as part of a company ergonomics standard, on worker injury risk.
Methods: Using the company's ergonomic hazards database to identify jobs with and without ergonomic HC implementation and linking to individual job and injury histories, injury risk among person-jobs with HC implementation (the HC group) was compared to those with without HC (NoHC group) using random coefficient models. Further analysis of the HC group was conducted to determine the effect of additional ergonomic hazards controlled on injury risk.
Results: Among 123 jobs at 17 plant locations, 347 ergonomic hazards were quantitatively identified during the study period. HC were implemented for 204 quantified ergonomic hazards in 84 jobs, impacting 10 385 persons (12 967 person-jobs). No HC were implemented for quantified ergonomic hazards in the remaining 39 jobs affecting 4155 persons (5046 person-jobs). Adjusting for age, sex, plant origin, and year to control for any temporal trend in injury risk, the relative risk (RR) for musculoskeletal disorder (MSD) was 0.85 and the RR for any injury or MSD was 0.92 in the HC compared to NoHC group. Among the HC group, each ergonomic hazard controlled was associated with risk reduction for MSD and acute injury outcomes (RR 0.93).
Conclusion: Systematic ergonomic HC through participatory ergonomics, as part of a mandatory company ergonomics standard, is associated with MSD and injury risk reduction among workers in jobs with HC implemented.

Source : Cantley LF, Taiwo OA, Galusha D, Barbour R, Slade MD, Tessier-Sherman B, Cullen MR. Scand J Work Environ Health.
http://dx.doi.org/10.5271/sjweh.3394

Estimating dynamic external hand forces during manual materials handling based on ground reaction forces and body segment accelerations

Direct measurement of hand forces during assessment of manual materials handling is infeasible in most field studies and some laboratory studies (e.g., during patient handling). Therefore, this study proposed and evaluated the performance of a novel hand force estimation method based on ground reaction forces (GRFs) and body segment accelerations. Ten male subjects performed a manual lifting/carrying task while an optoelectronic motion tracking system measured 3D full body kinematics, a force plate measured 3D GRFs and an instrumented box measured 3D hand forces. The estimated 3D hand forces were calculated by taking the measured GRF vector and subtracting the force vectors due to weight and acceleration of all body segments. Root-mean-square difference (RMSD) between estimated and measured hand forces ranged from 11 to 27N. When ignoring the segment accelerations (just subtracting body weight from the GRFs), the hand force estimation errors were much higher, with RMSDs ranging from 21 to 101N. Future studies should verify the performance of the proposed hand force estimation method when using an ambulatory field measurement system.

Source : http://www.jbiomech.com/article/S0021-9290(13)00355-2/abstract?rss=yes

Syndrome du canal carpien

Ce blog créé par la Carsat Alsace Moselle rassemble des données utiles sur le syndrome du canal carpien (symptômes, origines...) ainsi que des ressources pour détecter et prévenir ce trouble musculosquelettique.

Source : http://blogs.carsat-am.fr/spip.php?rubrique49

Occupation, participation, inclusion, work role Postural control in different load handling tasks

BACKGROUND: Manual material handling has been attributed as a major risk to human musculoskeletal system. Workers postural stability in these tasks is influenced by holding method, time and weight being handled. OBJECTIVES: The study attempts to investigate postural balance in five different commonly adopted load handling methods amongst female volunteers. METHODS: 10 women subjects performed manual material handling tasks by lifting 9 kg load in five different ways. Lifting tasks included (1) Upfront in palms (2) on head (3) sideways (left) (4) sideways (right) and (5) in bag at back. Normalized electromyography signals (back and leg) and center of pressure displacements parameters were investigated as measures of postural control. RESULT: An increase in the medio-lateral and anterio-posterior center of pressure displacements and activity of back muscles was reported when subjects lifted the weight directionally. CONCLUSION: There was a significant influence of load position on center of pressure displacements and muscle activity and thereby on postural stability.

Source : Pranab Nag, Anjali Nag, Heer Vyas, Priyanka Shah. Work: A Journal of Prevention, Assessment and Rehabilitation.
http://dx.doi.org/10.3233/WOR-131735
http://iospress.metapress.com/content/H8N718208701WR85

TMS et facteurs psychosociaux

Dans ce numéro, intitulé « TMS et facteurs psychosociaux », la prévention des risques sera abordée dans une approche globale de la santé au travail. Les TMS sont sans cesse en augmentation dans un contexte de travail marqué par l'intensification, le cumul des contraintes et des évolutions rapides des métiers. Le partage de connaissances et de compétences entre chercheurs et praticiens, issus de plusieurs disciplines, est nécessaire pour faire progresser l'étiologie et les méthodes d'intervention. En centrant le point de vue sur l'activité de travail, le lecteur pourra enrichir ses connaissances sur les TMS et les facteurs psychosociaux. Il trouvera au travers d'exemples empiriques des moyens d'améliorer la prévention par la combinaison de méthodes visant à développer l'évaluation des déterminants des risques ainsi que l'intervention sur la conception de l'organisation du travail et de la pluridisciplinarité.

Source : http://pistes.revues.org/

 

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