Health Risk Evaluation of Whole-body Vibration by ISO 2631-5 and ISO 2631-1 for Operators of Agricultural Tractors and Recreational Vehicles

Park, Min-Soo; Fukuda, Takabumi; Kim, Tae-gu; Maeda, Setsuo

doi:10.2486/indhealth.2012-0045

Cited by 43 publications

(17 citation statements)

References 3 publications

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“…The frequency range (0.1‐15 Hz) encompassed both slow movements (0.1 Hz), ambulation (~1 Hz), and high frequency vibrations experienced while using heavy equipment (3‐15 Hz). Just as we found increased viscoelastic heating at higher frequencies, exposure of tractor, bus and heavy equipment drivers to high frequency vibrations is associated with increased risk of back pain …”

Section: Discussionmentioning

confidence: 66%

“…While the strain magnitude applied to IVD was higher than the levels of nominal strain (ie, endplate-endplate strain) generally observed in vivo, it was within the range of local strains that occur in human discs in experimentally simulated physiological conditions. 33 The frequency range (0.1-15 Hz) encompassed both slow movements (0.1 Hz), ambulation (~1 Hz), and high frequency vibrations experienced while using heavy equipment (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). Just as we found increased viscoelastic heating at higher frequencies, exposure of tractor, bus and heavy equipment drivers to high frequency vibrations is associated with increased risk of back pain.…”

Section: Discussionmentioning

confidence: 99%

“…In vivo, IVD undergo cyclic multiaxial deformations, including axial compression, as a result of regular movements, physical activities, and exposure to vibrations. Individuals operating heavy machinery, such as construction equipment, experience full body vibrations up to and exceeding 15 Hz . Over time IVD can degrade as a result of age or injury, resulting in reduced function and significant pain .…”

Section: Introductionmentioning

confidence: 99%

“…Individuals operating heavy machinery, such as construction equipment, experience full body vibrations up to and exceeding 15 Hz. [9][10][11] Over time IVD can degrade as a…”

mentioning

confidence: 99%

“…Individuals operating heavy machinery, such as construction equipment, experience full body vibrations up to and exceeding 15 Hz. [9][10][11] Over time IVD can degrade as a result of age 12 or injury, resulting in reduced function and significant pain. 1 Heating in the IVD is of particular interest because recent investigations have shown that degenerative human IVD is capable of sensitizing nociceptive neurons to thermal stimuli.…”

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confidence: 99%

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Viscoelastic heating of insulated bovine intervertebral disc

2018

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Back pain is the leading cause of disability globally and the second most common cause of doctors' visits. Despite extensive research efforts, the underlying mechanism of back pain has not been fully elucidated. The intervertebral disc (IVD) is a viscoelastic tissue that provides flexibility to the spinal column and acts as a shock absorber in the spine. When viscoelastic materials like the IVD are cyclically loaded, they dissipate energy as heat. Thus, diurnal, regular movements of the vertebral column that deform the IVD could increase disc temperature through viscoelastic heating. This temperature rise has the potential to influence cell function, drive cell death and induce nociception in innervating nociceptive neurons within the IVD. The present study was conducted to investigate the capacity of IVD to increase in temperature due to viscoelastic heating. Insulated caudal bovine IVD were subjected to physiological cyclic uniaxial compression over a range of frequencies (0.1-15 Hz) and loading durations (1-10 min) ex vivo, and the temperature rise in the tissue was recorded. According to our findings, the IVD can experience a temperature rise of up to 2.5 C under cyclic loading. Furthermore, under similar conditions, the inner nucleus pulposus exhibits more viscoelastic heating than the outer annulus fibrosis, likely due to its more viscous composition. The measured temperature rise of the disc has physiological relevance as degenerative IVD tissue has been shown to produce a sensitization of nociceptive neurons that spontaneously fire at 37 C, with a T50 response at 37.3 C and a maximum response at 38 C. Our results suggest that viscoelastic heating of IVD could interact with sensitized nociceptive neurons in the degenerative IVD to play a role in back pain.

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Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Individuals operating heavy machinery, such as construction equipment, experience full body vibrations up to and exceeding 15 Hz. [9][10][11] Over time IVD can degrade as a…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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Viscoelastic heating of insulated bovine intervertebral disc

2018

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Measurement and evaluation of whole‐body vibration exposure in drivers of cargo vehicle compositions

Bortolini

Miguel

Becker

2018

Hum Ftrs & Erg Mfg Svc

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The present study carries out measurements and evaluations of whole‐body vibration (WBV) exposure in drivers of a cargo vehicle composition, traveling under different conditions of roads and loading, to compare and assess the health risk through the various criteria provided by vibration exposure standards. Using the acceleration data measured in the seat, the WBV exposure of the drivers is evaluated according to the criteria provided by five standards: three different versions of ISO 2631 (Part 1, 1985 and 1997; Part 5, 2004), the European Directive 2002/44/EC and the new Brazilian regulation NR‐15 published in 2014. Comparisons investigating the differences between the standards are presented. The results of the experimental data indicate that the current version of the NR‐15 is more restrictive than the other standards considered in this paper. Thus, these results can contribute to improve the criteria used in the new NR‐15.

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Health Hazards in Farming

Nag

Gite

2020

Design Science and Innovation

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Health Risk Evaluation of Whole-body Vibration by ISO 2631-5 and ISO 2631-1 for Operators of Agricultural Tractors and Recreational Vehicles

Cited by 43 publications

References 3 publications

Viscoelastic heating of insulated bovine intervertebral disc

Viscoelastic heating of insulated bovine intervertebral disc

Measurement and evaluation of whole‐body vibration exposure in drivers of cargo vehicle compositions

Health Hazards in Farming

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