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Cumulative occupational mechanical exposures during working life and risk of sickness absence and disability pension
Prospective cohort study Using a biomechanical job exposure matrix combined with Danish registers, cumulative occupational mechanical exposures throughout life (ie, more years with heavy and frequent lifting, and kneeling work) predicted risk of long-term sickness absence among older workers. Importantly, heavy lifting throughout working life was associated with disability pension. Source: Sundstrup E, Hansen ÅM, Mortensen EL, Poulsen OM, Clausen T, Rugulies R, Møller A, Andersen LL. (2017). Scand J Work Environ Health . http://dx.doi.org/10.5271/sjweh.3663
Risque vibratoire chez les opérateurs d’engins mobiles
Cartographie des postures et des vibrations au poste de conduite Les opérateurs d'engins mobiles sont exposés à des vibrations de l'ensemble du corps susceptibles d'être à l'origine de troubles du rachis. La procédure actuelle d'évaluation du risque vibratoire ne tient pas compte de la position et des mouvements du corps des conducteurs. Ces paramètres sont aujourd'hui considérés comme des cofacteurs importants. Pour cette raison, l'INRS mène des travaux de recherche visant à mettre au...
Étude en laboratoire d’un système de faible coût permettant de mesurer les forces de couplage à l’interface main-poignée d’outils portatifs vibrants
L'évaluation de l'exposition aux vibrations transmises au système main-bras et des lésions qui peuvent en résulter lors de l'utilisation d'outils portatifs motorisés repose actuellement sur les principes directeurs de la norme ISO 5349-1. Les dispositions de la norme ne tiennent pas compte, cependant, de l'effet des forces de couplage à l'interface main-poignée, alors que de nombreuses études ont démontré l'importance de ces forces dans la transmission des vibrations au système main-bras. Cela...
Transcriptional Pathways Altered in Response to Vibration in a Model of Hand-Arm Vibration Syndrome
Objective: The aim of this study was to use an established model of vibration-induced injury to assess frequency-dependent changes in transcript expression in skin, artery, and nerve tissues. Methods: Transcript expression in tissues from control and vibration-exposed rats (4h/day for 10 days at 62.5, 125, or 250?Hz; 49m/s2, rms) was measured. Transcripts affected by vibration were used in bioinformatics analyses to identify molecular- and disease-related pathways associated with exposure to vibration. Results: Analyses revealed that cancer-related pathways showed frequency-dependent changes in...
A critical review of evidence related to hand-arm vibration syndrome and the extent of exposure to vibration
This report describes a systematic literature review on the nature of the exposure-response relationship between hand-transmitted vibration and the elements of hand-arm vibration syndrome (HAVS), ie the vascular, neurosensory and musculoskeletal components. Annex C of ISO 5349-1:2001 contains an exposure-response relationship for vascular HAVS, yet this review of the literature has not found any strong evidence of a precise quantitative relationship between exposure to vibration and health outcomes, either for vascular or neurosensory HAVS. There is some evidence that suggests possible limited...
Calculette vibration ensemble du corps
Cette calculette au format Excel permet d'évaluer l'exposition quotidienne aux vibrations transmises à l'ensemble du corps par les engins mobiles. A partir des données vibratoires connues au préalables (mesures ou bases de données, suivant les 3 directions ou l'axe dominant), elle permet de calculer rapidement et facilement l'exposition vibratoire journalière A(8) d'un conducteur, et ceci même si ce dernier utilise plusieurs engins dans sa journée. Les résultats donnés par la calculette permettent de situer...
Calculette vibration mains bras
Cette calculette au format Excel permet d'évaluer l'exposition quotidienne aux vibrations transmises aux membres supérieurs. Sans avoir besoin de réaliser des mesures complexes, elle permet d'estimer rapidement l'exposition vibratoire journalière transmise par les machines portatives ou guidées à la main, et ceci même si l'opérateur utilise plusieurs équipements dans une même journée. Les résultats donnés par la calculette permettent de situer les niveaux d'exposition d'un opérateur...
Coupling forces exerted on chain saws by inexperienced tree fellers
Prolonged, intensive exposure to vibrations produced by vibrating tools could cause non-specific disorders in upper extremities of the operator, referred to as hand-arm vibration syndrome (HAVS). The severity of HAVS is affected by the magnitude of coupling forces exerted on the tool handle. The aim of the study was to measure the coupling forces exerted by inexperienced tree fellers on chain saws. Forces exerted by inexperienced tree fellers were compared to those of professional lumberjacks to investigate the relationship between the coupling forces and the experience of the chain saw operator...
Comparative analysis of exposure limit values of vibrating hand-held tools
In the European Union, one of every four workers claims to be exposed to vibration for up to 2 h of his/her working day. The use of vibrating hand-held tools is the most common cause of vibration-related injury in workers. Of all sectors of professional activity, the construction industry has the highest number of workers affected by vibration. European Directive 2002/44/EC on the minimum health and safety requirements regarding worker exposure to risks from physical agents (e.g. vibration) limits exposure to vibration. This study analysed the exposure level of construction workers to hand-arm...
Whole body vibration exposures in bus drivers: A comparison between a high-floor coach and a low-floor city bus
Low back pain (LBP) is common in occupational bus drivers and studies have shown a dose–response relationship between whole body vibration (WBV) exposure and LBP. Bus design may be an important factor in determining the WBV exposure a bus driver receives. The purpose of this study was to determine whether differences exist in WBV exposures between two buses commonly used in long urban commuter routes: a high-floor coach and a low-floor city bus. Each bus was driven over a standardized test route which included four road types: a newer smooth freeway, a rougher old freeway, a city street segment...
The effectiveness of BS EN ISO 28927-9:2009 concerning the vibration emission of scaling hammers and needle scalers
The work in this report provides HSE with information regarding: the likelihood that use of a tool's vibration emission value will result in minimised vibration exposures for the end user; and the limitations of the declared vibration emission value measured according to the standard test code, for use in a vibration exposure assessment. Source : http://www.hse.gov.uk/research/rrpdf/rr967.pdf
Identification of quality attributes of automotive idle sounds and whole-body vibrations
The aims of this study are the generation and comparison of the semantic spaces of vehicle idling sounds and vibrations and the determination of their quality dimensions. In this study, two different sets of quality attributes were developed for idling sounds (34 attributes) and whole-body vibrations (22 attributes). In contrast to prior investigations, the results demonstrated that the sound level alone is an insufficient attribute for describing the complexity of idle sounds and vibration perceptions. The qualities of both idle sounds and idle vibrations have multidimensional, complex characters...
Quantitative neurosensory findings, symptoms and signs in young vibration exposed workers
Background: Long-term exposure to hand-held vibrating tools may cause the hand arm vibration syndrome (HAVS) including vibration induced white fingers and sensorineural symptoms. The aim was to study early neurosensory effects by quantitative vibrotactile and monofilament tests in young workers with hand-held vibration exposure. Methods: This cross-sectional study consisted of 142 young, male machine shop and construction workers with hand-held exposure to vibrating tools. They were compared with 41 non-vibration exposed subjects of the same age-group. All participants passed a structured interview...
Predicting discomfort from whole-body vertical vibration when sitting with an inclined backrest
Current methods for evaluating seat vibration to predict vibration discomfort assume the same frequency weightings and axis multiplying factors can be used at the seat surface and the backrest irrespective of the backrest inclination. This experimental study investigated the discomfort arising from whole-body vertical vibration when sitting on a rigid seat with no backrest and with a backrest inclined at 0° (upright), 30°, 60°, and 90° (recumbent). Within each of these five postures, 12 subjects judged the discomfort caused by vertical sinusoidal whole-body vibration (at frequencies...
Combined Exposures: An update from the International commission on biological effects of noise
International Commission on Biological Effects of Noise (ICBEN) Team 8 deals with the effects of combined "agents" in the urban and work place settings. Results presented at the ICBEN conference indicate that some pesticides, more specifically the organophosphates, and a wider range of industrial chemicals are harmful to the auditory system at concentrations often found in occupational settings. Effects of occupational noise on hearing are exacerbated by toluene and possibly by carbon monoxide. Several of the chemicals studied found to be potentially toxic not only to hair cells in the...
Comparative analysis of exposure limit values of vibrating hand-held tools
In the European Union, one of every four workers claims to be exposed to vibration for up to 2 h of his/her working day. The use of vibrating hand-held tools is the most common cause of vibration-related injury in workers. Of all sectors of professional activity, the construction industry has the highest number of workers affected by vibration. European Directive 2002/44/EC on the minimum health and safety requirements regarding worker exposure to risks from physical agents (e.g. vibration) limits exposure to vibration.This study analysed the exposure level of construction workers to hand-arm vibration...
Réglementation nuisances physiques : Une approche commune
Les textes réglementaires relatifs aux quatre nuisances physiques générées au travail que sont le bruit, les vibrations, les champs électromagnétiques et les rayonnements optiques artificiels peuvent être d'un abord difficile pour des non-spécialistes. Afin de faciliter leur approche, nous présentons ici leurs fondements communs et les grands principes qui les régissent. Source : http://www.inrs.fr/accueil/produits/mediatheque/doc/publications.html?refINRS=ED%206128
Vibration and mechanical shock exposure strongly associated with prevalence of neck pain
The objective of this study was to determine whether whole-body vibration (WBV) and mechanical shock exposure from quad bike use are associated with the prevalence of neck and low back pain (LBP) in New Zealand farmers and rural workers. Physical exposures (mechanical shocks), employee status, and low levels of workplace satisfaction are all significantly associated with the 12-month prevalence of LBP in this rural workforce that regularly uses quad bikes. Both vibration and mechanical shock exposure were strongly associated with 12-month prevalence of neck pain. The 7-day prevalence of neck pain...
An ongoing challenge to increase workplace awareness and attention to the risks of vibration exposure
Although the risks associated with vibration exposure have been known for a long time, the importance of risk prevention has increased in Europe since the implementation of the Machine Directives in 1989 (1989/392/EC) and the Vibration Directive in 2002 (2002/44/CE). These Directives challenged manufacturers to design low-vibration tools, and employers to manage the site specific risks of vibration exposure. Field experience has shown that many companies using vibrating tools have never carried out a risk-management program, and that they continue to ignore their responsibilities in the Vibration...
Uptake and quality of health surveillance for hand-arm vibration and noise exposure - A telephone based survey among dutyholders
Health surveillance (HS) is the systematic supervision of workers looking for early signs of work-related ill health in employees exposed to certain hazards. Health surveillance for hand-arm vibration (HAV) is largely based on the collecting of appropriate symptoms in individual workers, while quantitative pure-tone audiometry is a large element of HS activity for noise. This report details a telephone-based questionnaire study on the uptake and quality of HS for the hazards of noise and HAV. The study was undertaken during 2009-2010 and was centred on an agreed number of industry sectors, where...
Conduite des engins de chantier : comment réduire les vibrations ?
La conduite d’un engin de chantier est souvent synonyme de vibrations. Par l’intermédiaire du siège, le conducteur assis ressentira ces vibrations dans l’ensemble du corps. Pour le conducteur debout, c’est le plancher qui transmet ces vibrations. Subies de façon intensive et répétitive, ces vibrations peuvent générer des douleurs dans le dos. C’est ainsi que chaque année, près de 400 cas d’affections chroniques du rachis lombaire liés aux vibrations sont reconnus par la Sécurité...
Working with vibrating machines with noise exposure increases the risk of hearing loss
The aim of this study was to examine the possible association of combined exposure of noise and hand-arm vibration (HAV) and the risk of noise-induced hearing loss. Workers in a heavy engineering industry were part of a dynamic cohort. The results show that working with vibrating machines in an environment with noise exposure increases the risk of hearing loss, supporting an association between exposure to noise and HAV, and the noise-induced hearing loss. Source : Hans Pettersson, Lage Burström, Mats Hagberg, Ronnie Lundström, Tohr Nilsson. Noise and hand-arm vibration exposure in relation...
Principaux risques physiques à l'origine de troubles lombalgiques chez les opérateurs d'engins mobiles : revue de littérature
Les enquêtes épidémiologiques démontrent un risque accru de lombalgie chez les opérateurs d'engins mobiles travaillant en position assise. Pour prévenir ce risque, l'INRS et ses homologues internationaux cherchent à développer une méthode d'évaluation du risque vibratoire intégrant l'ensemble des contraintes physiques auxquelles des opérateurs d'engins vibrants peuvent être exposés. Les efforts portent sur l'apport de connaissances nouvelles concernant la quantification ainsi...
Six-degrees-of-freedom measurement to select operator seats based on industry specific field vibration characteristics
The purpose of this paper was to quantify in (6DOF) whole-body vibrations during the daily operating tasks of 5 commonly used mobile machines types used in the steel making and metal smelting industries. Elevated values were observed at the chassis for crest factors, peak running root mean squared accelerations, and vibration total values, resulting in ISO 2631-1 (1997) comfort predictions ranging from Uncomfortable to Extremely Uncomfortable. Vibration dominant frequencies were generally between 1 and 8Hz. A second peak which occurred at approximately 27 Hz was observed for each vehicle in almost...
Exposure of suspended cabin tractor semi trailer drivers exceeds the upper limit for an 8-h work day
This paper presents a study on whole body vibration analysis for drivers of tractor semitrailers. The tractor semitrailer, namely, a suspended cabin tractor semitrailer was considered for the present investigation. The important process parameters such as different speeds, different road surfaces and different loaded conditions with driver seat interface acceleration in X- longitudinal, Y transverse and Z-vertical axes were tested. The average running weighted root mean square accelerations obtained after conducting the experimental work were between 0.6265 and 1.5594 m/s2 at the driver seat interface...
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