scholarly journals Preventive action with a population of excavator drivers exposed to whole-body vibration

Work ◽  
2021 ◽  
Vol 68 (2) ◽  
pp. 473-481
Author(s):  
P. Bossi ◽  
P. Meert

BACKGROUND: Whole-body vibration is a major cause of lower back pain among employees, and the medical and preventive care teams of occupational health departments are often confronted with lower back pain problems among machine operators. OBJECTIVES: The objectives of this research are to determine the number of excavator drivers exposed to whole-body vibration levels above 0.5m/s2, identify other exposure factors that may contribute to back pain, and propose corrective measures. METHODS: Vibration measurements were carried out on individual excavator drivers while they were observed carrying out working tasks, after which prevention advice is given. Factors which determine vibration levels are logged on to a database. RESULTS: The multivariate analysis of several determining factors shows vibration exposure levels vary depending on the varied work tasks being carried out. CONCLUSION: This study identifies exposed employees among excavator operators. For each workstation, the determining factors that could explain the high exposures to vibrations are identified. This work shows the important role of tasks on exposure levels. A better adaptation of the tools used to carry out work tasks would allow a decrease in the vibration level of this type of machine.

Spine ◽  
2002 ◽  
Vol 27 (17) ◽  
pp. 1829-1834 ◽  
Author(s):  
Jörn Rittweger ◽  
Karsten Just ◽  
Katja Kautzsch ◽  
Peter Reeg ◽  
Dieter Felsenberg

Author(s):  
Hassam A. Baig ◽  
Daniel B. Dorman ◽  
Bethany L. Shivers ◽  
Arlene Breaux-Waltz ◽  
V. Carol Chancey ◽  
...  

Vibration exposure has been linked to chronic neck and lower back pain [1,2]. For example, American male workers operating vibrating vehicles, such as industrial trucks and tractors, have been reported to have a higher prevalence of low back pain than workers whose occupations do not involve vibration exposures [1]. Also, military helicopter aviators report increased pain during deployment compared to pre-deployment, with between 22–37% reporting neck and 39–70% reporting low back pain [2]. It has been suggested that the cyclic muscle response to whole body vibration (WBV) can lead to muscle fatigue, further contributing to the development of low back pain [3]. Although several studies have measured the transmissibility response of the human spine [4,5], studies defining the mechanical effects of whole body vibration in a seated human are limited [4,5] and none have investigated the relationship between the biomechanical and muscle activity responses during such whole body vibration exposures.


Work ◽  
2021 ◽  
pp. 1-13
Author(s):  
Rahul Upadhyay ◽  
Ashis Bhattacherjee ◽  
Aditya Kumar Patra ◽  
Nearkasen Chau

BACKGROUND: Dumper operators in mines worldwide are subjected to Musculoskeletal Disorders (MSDs) due to whole-body vibration exposure. This study evaluated the working-life-Whole-Body Vibration (WBV)-exposure and their association with various MSDs among dumper operators in mines which remains poorly addressed. METHODS: This case-control study in Indian iron ore mines was conducted to compare randomly selected 65 dumper operators and 65 office workers. Data were collected through face-to-face interviews using the Nordic Musculoskeletal Questionnaire (NMQ) and were analysed using logistic regression models. RESULTS: The study revealed that majority of the dumper operators were exposed to WBV exceeding the ISO-2631 limits. Compared with controls, the dumper operators had a much higher risk of upper back pain (age-overweight-adjusted odds ratio ORao = 5.37, 95%CI = 1.78–16.20), lower back pain (ORao = 2.72, 95%CI = 1.25–5.94), knee and leg pain (ORao = 3.68, 95%CI = 1.22–11.11), and having 2+ MSDs (ORao = 5.05, 95%CI = 1.88–13.51, vs. no MSDs). Working-life-WBV-exposure was higher among dumper operators having upper back pain (mean (SD) = 7.1 (1.91) vs. 5.7 (1.91), p <  0.01) and lower back pain (mean (SD) = 6.63 (2.10) vs. 5.55 (1.71), p <  0.01) compared to those without these MSDs. Older age was associated with higher risk of MSD pains. CONCLUSION: Dumper operators have excess MSDs due to high working-life-WBV-exposure. Their MSDs and working-life-WBV-exposure should be regularly evaluated and reduced.


2019 ◽  
Vol 76 (8) ◽  
pp. 554-559 ◽  
Author(s):  
Lope H Barrero ◽  
Manuel Cifuentes ◽  
Andrés C Rodríguez ◽  
Estefany Rey-Becerra ◽  
Peter W Johnson ◽  
...  

ObjectiveTo determine the association between several whole-body vibration (WBV) exposure estimates and back pain-related work absence.MethodsExposures (based on the weighted daily root mean square acceleration, A(8); the daily vibration dose value, VDV(8); and the daily equivalent static compression dose, Sed(8)) of 2302 workers during 4 years were estimated using each worker’s monthly vehicle operation records and WBV measurements from 11 different types of heavy equipment vehicles in a large coal mine. Company payroll data provided work absence during the concurrent 4 years of exposure. Cox regression models estimated the associations between the different WBV metrics and time to first work absence related to back pain. An adjusted R2 statistic provided a measure of model fit.ResultsAll estimated metrics of WBV exposures were positively and significantly associated with back pain-related absence. HRs varied from 2.03 to 12.39 for every 0.21 m/s2 increase in the A(8)-based exposures; from 1.03 to 1.18 for every 1.72 m/s1.75 increase in VDV(8)-based exposures; and from 1.04 to 1.07 for every 0.06 MPa increase in Sed(8)-based exposures. Models using the estimated VDV(8) metric for the z axis fit the data best as measured by the R2 statistic.ConclusionHigher WBV exposures were associated with back pain-related absences in this population, which appears after a few years of follow-up. Introducing controls to lower exposure levels may help reduce back pain-related work absences.


2021 ◽  
Vol 163 (A3) ◽  
Author(s):  
T J Newman

A common risk to personnel is from Whole Body Vibration (WBV) and shock when transiting at speed in heavy seas, and much research has been done by maritime organisations to reduce this risk and the associated health impacts. It is well known that coxswain ‘driving style’ can radically affect exposure levels for a given sea state and sustained transit speed. A data-driven approach to define what makes a good coxswain from a WBV perspective is currently being developed by the Naval Design Partnering team (NDP). In phase 1, a systematic coxswain behaviour tracking methodology has been developed and demonstrated using a motion platform-based fast craft simulator at MARIN. The performance of several experienced volunteer coxswains from MOD, RNLI and KNRM has been evaluated based on a set pattern of tests. The advantages of using the simulator, over a sea trial, have been demonstrated: it is more repeatable, more controllable, accurate and more accessible. The potential disadvantages of the approach are also discussed with reference to feedback gathered from coxswains. Analysis has shown effective throttle control is much more important than steering to reduce WBV. Several interesting trends in WBV reduction potential have been shown which it is thought, with further validation, could aid mission planning, mission execution and provide data for training autonomous feedback/control algorithms. Further work is required before the findings of this study can be fully exploited. These subsequent phases, which include sea trials, aim to provide validation and further evidence to support the initial findings.


Medicine ◽  
2018 ◽  
Vol 97 (38) ◽  
pp. e12534
Author(s):  
Yi-Li Zheng ◽  
Zhi-Jie Zhang ◽  
Meng-Si Peng ◽  
Hao-Yu Hu ◽  
Ju Zhang ◽  
...  

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