Occupational Raynaud’s II

Ashe, William F.; Williams, Nerys

doi:10.1080/00039896.1964.10663861

Cited by 37 publications

(6 citation statements)

References 3 publications

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“…Histological studies showed thickening of the muscular layer of the arteries, with hypertrophy of the muscle cells without intimal layer fibrosis. 8,9,18,35 Azuma et al 1 showed a vibration-induced hyperresponsiveness of arterial smooth muscle to nonadrenaline, and Welsh 36 demonstrated reduction of digital blood flow in the vibration frequency range of 40À200 Hz. However, the pathophysiology and mechanism of neurologic injury remain elusive.…”

Section: Discussionmentioning

confidence: 97%

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Neuropathological changes in vibration injury: An experimental study

et al. 2005

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Vibration syndrome, a clinical condition arising from chronic use of vibrating tools, is associated with a spectrum of neurovascular symptoms. To date, only its vascular pathology has been extensively studied; we sought to determine what direct neurologic injury, if any, is caused by vibration. Hindlimbs of anesthetized rats were affixed to a vibrating platform 4 h a day for 7 days. Study animals were vibrated with set parameters for frequency, acceleration, velocity, and amplitude; control animals were not vibrated. On day 7, nerves were studied by light and electron microscopy. While light microscopy showed minimal histologic differences between vibrated (n=12) and control (n=12) nerves, electron microscopic changes were dramatic. Splitting of the myelin sheath and axonal damage (e.g., myelin balls and "finger ring") were consistently seen in both myelinated and nonmyelinated axons. Despite relatively short vibration, definite pathology was demonstrated, suggesting that vibration syndrome has a direct neurologic component.

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Section: Discussionmentioning

confidence: 97%

“…1À4,6,8À10,18À20,23,29,30 Vibration syndrome is currently defined as a multisystem disorder of the peripheral circulation, 15,18 nerves, 30,31 muscles, 9 and joints.…”

Section: Discussionmentioning

confidence: 99%

Neuropathological changes in vibration injury: An experimental study

et al. 2005

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“…In the early 1960s HAVS was reported in hard-rock miners using jackleg hammers and stopper drills in Canada [10][11][12] . Subsequently reports came from Europe [13][14][15] , Japan 16,17) , and Korea, together with further reports from Canada [19][20][21][22][23][24] and America 25) .…”

Section: Discussionmentioning

confidence: 99%

Hand Arm Vibration Syndrome among Quarry Workers in Vietnam

Futatsuka

Shono

Sakakibara

et al. 2005

Journal of Occupational Health

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According to work observation studies, daily exposure time to vibration was 160-210 min. ISO5349 predicted that this exposure level would be associated with a high risk of HAVS in workers. We found no clear evidence of VWF. There may be several reasons why no worker exhibited VWF: (1) warmer work conditions, (2) younger and less experienced workers, (3) seasonal changes in work operations, and (4) healthy worker effect. On the other hand, 5-10% of rock drill operators might be suffering from moderate HAVS which was sensori-neural type dominant. There may be some characteristic features of HAVS among quarry workers in the tropical area. (J Occup Health 2005; 47: 165-170)

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“…Thus some cases of vibration-induced injury have been described in warm environments as has the occasional case of microembolism or narrowing due to athero-sclerosis. Nevertheless the Raynaud's phenomenon of occupational origin is rareinthetropics,andinCanadaa comparison of a warm and a cool mining environment revealed many cases in the latter and none in the warm mine (Ashe & Williams, 1964). Whole body cooling contributes to this phenomenon by general peripheral vasoconstriction.…”

Section: Coldmentioning

confidence: 99%

Vibration: good or bad?

Ryan

1981

Clin Exp Dermatol

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In 1862, Maurice Raynaud described one or more fingers becoming pale and cold, a phenomenon then known as‘dead finger'. It was an intermittent segmental whitening due to a sudden decrease in blood supply mainly in response to cooling. This phenomenon was later described in employees using hand‐held vibrating tools (Loriga, 1911), and it is now a well recognized industrial hazard known as the vibration white finger syndrome. Taylor & Pelmear (1975) published an edited version of papers submitted to the Department of Health and Social Security, and drew attention to four broad categories of industrial processes–chain sawing, hand and pedestal grinding, chipping with pneumatic tools, and copper tube swaging. In ail, eighteen populations were surveyed and 827 vibration‐exposed personnel were examined, along with 365 control subjects; 5·3%, of the vibration‐exposed subjects had white fingers. The longer the exposure to vibration the worse its effects, suggesting a cumulative effect. It was clear from the case histories that the disorder could progress to a stage of gross impairment of blood supply and death of the tissues. Although vibration was clearly the most important factor in the above study, it is of interest that 6·3% of the control population also had white fingers when exposed to cold. The factors responsible for white fingers in the population supposedly not exposed to vibration are unknown. In the exposed population the relevance of vibration was clearly shown both by its relationship to time of exposure and by the severity of the disorder when vibration exposure was continued over many years. In contrast to the vibration story, there is also a literature describing beneficial, hyperaemic effects of relatively acute exposure to local vibration. Vibro‐massage has a place in many physiotherapy departments particularly on the continent of Europe. Vibration is used in sports medicine to relax tense muscles, and its many beneficial effects are advertized for exhausted business men who may be persuaded to buy vibrating beds or chairs. While there is still no satisfactory explanation of either the beneficial or the harmful effects, this may yet come from a closer study of the acute changes due to vibration. These have been reported as relief from pain, ‘relaxation’, and increased blood flow. Wisham, Shaanan & Bierman (1956) showed that after short periods of vibration skin temperature was slightly raised in the toes of seven of twenty subjects and in the calves of twelve. The rate of tissue clearance of injected radioactive sodium by the blood stream was increased in thirteen out of fifteen subjects. Bierman (1960) and later Atha & Wheatley (1975) observed a remarkable increase in the extensibility of the spine and the lower limbs during touching of toes after whole‐body vibration, a phenomenon that might be due to relaxation of muscfe but could be an effect on tense ligaments swollen by tissue fluid. In this review the possibility is discussed that a unifying hypothesis of the mechanisms of tissue fluid dispersa...

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Occupational Raynaud’s II

Cited by 37 publications

References 3 publications

Neuropathological changes in vibration injury: An experimental study

Neuropathological changes in vibration injury: An experimental study

Hand Arm Vibration Syndrome among Quarry Workers in Vietnam

Vibration: good or bad?

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