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Does occupational lifting affect the risk of hypertension?
Cross-sectional and prospective associations in the Copenhagen City Heart Study Objective: The aim of this study was to investigate cross-sectional and prospective associations between heavy occupational lifting and hypertension. Methods: Data from the third, fourth and fifth examinations of the Copenhagen City Heart Study were included. Multivariable logistic regression models were applied to adjust for sex, age, body mass index (BMI), smoking, education, self-rated cardiorespiratory fitness, vital exhaustion and baseline blood pressure, and were used to estimate (i) the cross-sectional association...
Caractéristiques socioprofessionnelles, reconnaissance en maladie professionnelle et devenir fonctionnel et professionnel de patients opérés d’un syndrome du canal carpien en Île-de-France (2009-2012)
Points clés Cette étude menée par Santé publique France en partenariat avec le Réseau Prévention Main Île-de-France (IdF), chez des patients opérés d'un syndrome du canal carpien (SCC), décrit les caractéristiques socio-professionnelles (CSP, déclaration en maladie professionnelle…) des patients et leurs liens avec la durée d'arrêt de travail. Parmi les patients en activité au cours des 10 ans précédant l'intervention, 59 % considéraient leur travail comme...
Overall risk index for patient transfers in total assistance mode executed by emergency medical technician-paramedics in real work situations
Few studies have quantified the risk of musculoskeletal disorders during patient transfers in total assistance mode in real-life prehospital emergency care situations. An index to assess the overall risk of patient transfers was created; it makes it possible to quantify risk based on the patient's position and the height of the patient's location. An analysis of 71 transfers executed by paramedics in actual work situations showed that moving a patient from the ground was characterized by acute sagittal flexions and axial rotations, respectively, 42% and 12% of the time. When the patient...
A comparison of lumbar spine and muscle loading between male and female workers during box transfers
There is a clear relationship between lumbar spine loading and back musculoskeletal disorders in manual materials handling. The incidence of back disorders is greater in women than men, and for similar work demands females are functioning closer to their physiological limit. It is crucial to study loading on the spine musculoskeletal system with actual handlers, including females, to better understand the risk of back disorders. Extrapolation from biomechanical studies conducted on unexperienced subjects (mainly males) might not be applicable to actual female workers. For male workers, expertise...
The influence of external load configuration on trunk biomechanics and spinal loading during sudden loading
Sudden loading is a major risk factor for work-related lower back injuries among occupations involving manual material handling (MMH). The current study explored the effects of external weight configuration on trunk biomechanics and trunk rotational stiffness in the sagittal plane during sudden loading. Fifteen asymptomatic volunteers experienced sudden loadings using the same magnitude of weight (9 kg) with two different configurations (medially- or laterally-distributed) at three levels of height (low, middle and high). Results of this study showed that the medially distributed weight...
Overall risk index for patient transfers in total assistance mode executed by emergency medical technician-paramedics in real work situations
Few studies have quantified the risk of musculoskeletal disorders during patient transfers in total assistance mode in real-life prehospital emergency care situations. An index to assess the overall risk of patient transfers was created; it makes it possible to quantify risk based on the patient's position and the height of the patient's location. An analysis of 71 transfers executed by paramedics in actual work situations showed that moving a patient from the ground was characterized by acute sagittal flexions and axial rotations, respectively, 42% and 12% of the time. When the patient...
Surface electromyography for risk assessment in work activities designed using the “revised NIOSH lifting equation”
The aims of this study were: to identify surface electromyography (sEMG)-based indices of trunk muscles acquired during the execution of lifting tasks designed using the revised NIOSH lifting equation and featuring a progressively increasing lifting index (LI); to study changes of these indices in relation to the LI; to evaluate the relationship between the identified indices and forces (FL5−S1) and moments (ML5−S1) at the L5-S1 joint. sEMG, kinematic and kinetic data of 20 male workers were recorded in three conditions. We computed the average rectified value (ARV), root mean square...
How does the biomechanical exposure of the upper body in manual box handling differ from exposure in other tasks in the real industrial context?
The assessment of biomechanical exposure during handling tasks in relation to other activities that are performed in industrial settings can be crucial to understand the biomechanical demands of manual box handling for the upper limbs. This study aims to evaluate the representativeness of the handling task to the upper body in comparison with the other tasks in a real setting, compare the biomechanical exposure between tasks, and identify the differences in exposure during manual box handling from job exposure. Twelve workers had biomechanical exposure assessed through trapezius muscle activity...
Aide et soin à la personne - Dossier
En France, plus de 3,5 millions de professionnels travaillent dans l'aide et le soin à la personne. Ce secteur, qui emploie majoritairement du personnel féminin, est toujours en pleine croissance et marqué par une grande diversité d'acteurs. Certains exercent en établissement, d'autres au domicile d'un bénéficiaire avec, d'un lieu à l'autre, des conditions d'intervention et des moyens extrêmement variables. Source: (2018). Travail & sécurité (794). http://www.travail-et-securite.fr/ts/dossier...
Développement d’un système de mesures et d’un protocole de mesures permettant de quantifier l’exposition physique des manutentionnaires
L'objectif principal de ce projet était de combiner différents senseurs et instruments pour expérimenter, en laboratoire et sur le terrain, un système de mesures permettant d'estimer quantitativement l'exposition physique des manutentionnaires. Ce type de système pourrait éventuellement servir à évaluer objectivement l'efficacité d'approches de prévention. Un second objectif consistait à mettre au point une stratégie d'échantillonnage pour optimiser la mesure de l'exposition physique...
Accuracy of identification of low or high risk lifting during standardised lifting situations
The aim was to classify lifting activities into low and high risk categories (according to The Danish Working Environment Authority guidelines) based on surface electromyography (sEMG) and trunk inclination (tri-axial accelerometer) measurements. Lifting tasks with different weights, horizontal distance and technique were performed. The lifting tasks were characterised by a feature vector composed of either the 90th, 95th or 99th percentile of sEMG activity level and trunk inclinations during the task. Linear Discriminant Analysis and a subject-specific threshold scheme were applied and lifting...
Identifying the critical physical demanding tasks of paramedic work
Towards the development of a physical employment standard Public safety related occupations including police, fire and military commonly apply physical employment standard (PES) to facilitate job matching, an approach to evaluate if candidates demonstrate acceptable physical capabilities as required to perform the job safely and effectively. In Canada, paramedics remain as one of the few public safety occupations without an evidence-based, validated PES. The purpose of this study was to document and describe the physical demands of paramedic work and to identify the most physically demanding tasks...
NIOSH Lifting Equation App: NLE Calc
The National Institute for Occupational Safety and Health (NIOSH) Lifting Equation mobile application, NLE Calc, is a tool to calculate the overall risk index for single and multiple manual lifting tasks. This application provides risk estimates to help evaluate lifting tasks and reduce the incidence of low back injuries in workers. Source: https://www.cdc.gov/niosh/topics/ergonomics/nlecalc.html
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
Injury rates before and after the implementation of a safe resident handling program in the long-term care sector
Manual resident handling (RH) tasks increase risk of musculoskeletal disorders (MSDs) for clinical staff in nursing homes. To reduce the incidence and cost of MSDs, a large healthcare corporation instituted a Safe Resident Handling Program (SRHP) comprising purchase of mechanical lifting equipment, worker training, and detailed usage/maintenance protocols. The program was initially administered by a third-party company; after three years, program responsibility shifted to individual centers. Workers' compensation claim rates were compared before and after SRHP implementation. Claims and FTEs...
Sickness absence and permanent work disability in relation to upper- and lower-body pain and occupational mechanical and psychosocial exposures
Musculoskeletal pain in multiple sites has been associated with sickness absence and permanent work disability. We found that high occupational mechanical exposures were associated with sickness absence, particularly in case of combined pain in the upper and lower body. We also found that combined pain and low social support at work were associated with permanent work disability. Source: Sommer, T. G., Svendsen, S. W., & Frost, P. (2016). Scandinavian Journal of Work, Environment & Health . http://dx.doi.org/10.5271/sjweh.3600
Association between occupational lifting and day-to-day change in low-back pain intensity based on company records and text messages
Most previous studies assessing the association between physical workload and development of low-back pain have used self-reports for exposure. Using company records for quantifying exposure, this study shows that consecutive working days and higher workload are associated with acutely increased low-back pain. Source: Andersen LL, Fallentin N, Ajslev JZN, Jakobsen MD, Sundstrup E. Scand J Work Environ Health , 2016. http://dx.doi.org/10.5271/sjweh.3592
Safety risks associated with physical interactions between patients and caregivers during treatment and care delivery in Home Care settings
A systematic review Objectives: To explore the safety risks associated with physical interactions between patients and caregivers during treatment and care delivery in Home Care settings. Design: Seven-stage framework from the PRISMA statement for research question, eligibility (definition), search, identification of relevant papers from title and abstract, selection and retrieval of papers, appraisal and synthesis. Review methods: The included references (n = 42) were critically appraised using a modified version of Downs and Black checklist and the Mixed Methods Appraisal Tool. Results: The risk...
Ischaemic heart disease among workers in occupations associated with heavy lifting
OBJECTIVES: To investigate a hypothesized positive association between employment in occupations where heavy lifting is likely to occur, and the risk of ischaemic heart disease (IHD). MATERIAL AND METHODS: Male blue-collar workers from Denmark (N = 516 180) were monitored with respect to hospital treatment or death due to IHD, through national registers over the years 2001-2010. Poisson regression was used to estimate relative rates of IHD between "workers in occupations which, according to an expert opinion, are likely to involve heavy lifting" and "other blue-collar workers."...
Revised NIOSH Lifting Equation May generate spine loads exceeding recommended limits
The 1991 NIOSH Lifting Equation (NLE) is widely used to assess the risk of injury to spine by providing estimates of the recommended weight limit (RWL) in hands. The present study uses the predictive equations developed based on a detailed trunk musculoskeletal biomechanical model to verify whether the RWL generates L5-S1 loads within the limits (e.g., 3400 N for compression recommended by NIOSH and 1000 N for shear recommended in some studies). Fifty lifting activities are simulated here to evaluate the RWL by the NLE and the L5-S1 loads by the predictive equations. In lifting activities involving...
Association Between Lifting and Use of Medication for Low Back Pain
Results From the Backworks Prospective Cohort Study Objective: To evaluate relationships between lifting and lowering of loads and risk of low back pain resulting in medication use (M-LBP). Methods: At baseline, worker demographics, psychosocial factors, hobbies, LBP history, and lifting and lowering (quantified using the Revised NIOSH Lifting Equation) were assessed. A cohort of 258 incident-eligible workers was followed up for 4.5 years to determine new M-LBP cases and changes in lifting/lowering requirements. Proportional hazards regression with time-varying covariates was used to model associations...
The assessment of material handling strategies in dealing with sudden loading
The effects of load handling position on trunk biomechanics Back injury caused by sudden loading is a significant risk among workers that perform manual handling tasks. The present study investigated the effects of load handling position on trunk biomechanics (flexion angle, L5/S1 joint moment and compression force) during sudden loading. Eleven subjects were exposed to a 6.8 kg sudden loading while standing upright, facing forward and holding load at three different vertical heights in the sagittal plane or 45° left to the sagittal plane (created by arm rotation). Results showed that the increase...
Patient transfers and assistive devices
Prospective cohort study on the risk for occupational back injury among healthcare workers Objectives : This prospective cohort study investigates work-related risk factors for occupational back injury among healthcare workers. Methods : The study comprised 5017 female healthcare workers in eldercare from 36 municipalities in Denmark who responded to a baseline and follow-up questionnaire in 2005 and 2006, respectively. Using logistic regression, the odds for occupational back injury (ie, sudden onset episodes) in 2006 from patient transfers in 2005 was modeled. Results : In the total study population...
Clinical guidelines for occupational lifting in pregnancy
Evidence summary and provisional recommendations Empirically based lifting criteria established by the National Institute for Occupational Safety and Health (NIOSH) to reduce the risk of overexertion injuries in the general US working population were evaluated for application to pregnant workers. This report proposes criteria to guide decisions by medical providers about permissible weights for lifting tasks performed at work over the course of an uncomplicated pregnancy. Our evaluation included an extensive review of the literature linking occupational lifting to maternal and fetal health. Although...
Occupational lifting during pregnancy and risk of fetal death in a large national cohort study
Objective The aim of the present study was to examine the association between occupational lifting and the risk of fetal death according to gestational age. Methods We used data from the Danish National Birth Cohort (1996–2002). Among 71 500 occupationally active women, 2886 experienced a fetal death. Information on lifting and relevant covariates was collected in interviews around week 16 of pregnancy. The majority of fetal losses (N=2032) happened before the scheduled interview, and exposure data were collected retrospectively from these women. We analyzed early miscarriage (≤12 weeks...
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