Medical aspects of the hand-arm vibration syndrome

Bovenzi, Massimo

doi:10.1016/0169-8141(90)90051-3

Cited by 31 publications

(16 citation statements)

References 35 publications

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“…Vibration-induced vasocoilstrictor after-effects were found to increase as the duration of acute exposure to vibration increased. This finding seems to be consistent with those of some epidemiologic studies suggesting a positive association between the duration of daily vibration exposure and the risk for VWF among occupational groups using hand-held vibrating tools (3).…”

Section: Considerations Of a Possible Exposure-effect Relationshipsupporting

confidence: 82%

“…Annexes to the standards offer some information on the possible relationship between vibration exposure and the prevalence of vascular disorders in the fingers of vibration-exposed workers. These vascular disorders are characterized by symptoms of finger blanching and represent a secondary form of Raynaud's phenomenon, commonly called vibration-induced white finger (VWF) (3).…”

mentioning

confidence: 99%

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Duration of acute exposures to vibration and finger circulation

Bovenzi¹,

Lindsell²,

Griffin³

1998

Scand J Work Environ Health

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Objectives This study investigated changes in finger circulation after different durations of exposure to handtransmitted vibration. Methods Finger skin temperature (FST), finger blood flow (FBF), and finger systolic blood pressure (FSBP) were measured in the middle fingers of both hands of 10 healthy men. Finger vascular resistance was also estimated. The right hand was exposed for 7.5, 15, and 30 minutes (static load 10 N) to 125-Hz vibration (rootmean-square acceleration 87 m/s2). Static load only was used as a control. Finger circulation was measured before the vibration and static load exposure and at fixed intervals during exposure and a 45-minute recovery period.Results No significant changes were found with the static load. The FST and FSBP did not change significantly during vibration exposure, whereas vibration produced significant reductions in FBF and increases in vascular resistance at each duration when compared with preexposure and contralateral (nonvibrated) finger values. Temporary vasodilation occurred in the vibrated finger immediately after each vibration exposure. Recovery was complete for FBF and vascular resistance after the 7.5-minute vibration, whereas a progressive FBF reduction occurred in both the vibrated and the nonvibrated fingers after 15-and 30-minute exposure. The longer the duration of vibration exposure, the stronger the vasoconstriction in the vibrated finger during recovery. C O~C~U S~O N SVasoregulatory mechanisms mediated by both intrinsic (local) and extrinsic (neural or endocrine) control systems seem to be related to digital circulatory changes during 125-Hz vibration. It is concluded that, not only the frequency and magnitude of vibration, but also its duration contributes to the reaction of the digital vessels to acute vibration.

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Section: Considerations Of a Possible Exposure-effect Relationshipsupporting

confidence: 82%

mentioning

confidence: 99%

Duration of acute exposures to vibration and finger circulation

Bovenzi¹,

Lindsell²,

Griffin³

1998

Scand J Work Environ Health

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“…Excessive exposure to hand-transmitted vibration causes vascular and neurological disorders (e.g. Bovenzi, 1990) as well as discomfort and interference with activities (Griffin, 1990). However, vibration can also provide useful tactile feedback and assist some tasks.…”

Section: Introductionmentioning

confidence: 99%

Thresholds for the perception of hand-transmitted vibration: Dependence on contact area and contact location

Morioka

Griffin

2005

Somatosensory & Motor Research

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The detection of vibration applied to the glabrous skin of the hand varies with contact conditions. Three experiments have been conducted to relate variations in the perception of hand-transmitted vibration to previously reported properties of tactile channels. The effects of a surround around the area of contact, the size of the area of contact, the location of the area of contact, the contact force, and the hand posture on perception of thresholds were determined for 8 to 500 Hz vibration. Removal of a surround around a contact area on the fingertip elevated thresholds of the NP II channel (FA I fibers) at frequencies less than 31.5Hz and reduced thresholds of the Pacinian channel (FA II fibers) at frequencies greater than about 63 Hz. When no surround was present, thresholds reduced systematically as the contact area increased from the fingertip to the whole hand at frequencies from 16 to 125 Hz, although the decrease was not inversely proportional to the increase in contact area. The results are partly explained by spatial summation in the Pacinian channel (FA II fibers) and the involvement of the NP II channel (SA II) with some influence of biodynamic responses and contact pressures. There were regional differences in sensitivity over the hand within the NP I channel but not within the Pacinian channel: the NP I thresholds (less than 31.5 Hz) decreased from proximal to distal regions of the hand, whereas the Pacinian thresholds (125 Hz) were independent of contact location over the hand. 249 words (No more than 250 words)

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“…It involves multiple neurologic, vascular, and musculoskeletal abnormalities. 1 This condition should be distinguished from hypothenar hammer syndrome (HHS). This latter syndrome develops as a result of a lesion in the ulnar artery at the level of hamate bone, which occurs due to repetitive trauma from use of the hypothenar side of the hand as a hammer.…”

Section: Introductionmentioning

confidence: 99%