Reductions in finger blood flow induced by 125-Hz vibration: effect of location of contact with vibration

Yao, Yuqi; Griffin, Michael J.

doi:10.1007/s00420-015-1081-7

Cited by 10 publications

(5 citation statements)

References 29 publications

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“…The findings are consistent with Ekenvall et al ( 1989 ) who found no relation between vascular symptoms and the outcome of sensory testing. Whereas the chronic changes giving rise to finger blanching are not clearly associated with thresholds, acute reductions in finger blood flow caused by vibration are associated with thresholds for the perception of vibration (Ye and Griffin 2011 , 2014 , 2016b ). The contradiction implies that the acute and chronic changes have different mechanisms, with the vascular impairment in vibration-exposed persons being associated with either a different form of neurological damage or some form of local structural damage causing the vascular phenomenon known as vibration-induced white finger.…”

Section: Discussionmentioning

confidence: 99%

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Yao

Griffin

2017

Int Arch Occup Environ Health

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BackgroundThermotactile thresholds and vibrotactile thresholds are measured to assist the diagnosis of the sensorineural component of the hand–arm vibration syndrome (HAVS).ObjectivesThis study investigates whether thermotactile and vibrotactile thresholds distinguish between fingers with and without numbness and tingling.MethodsIn 60 males reporting symptoms of the hand–arm vibration syndrome, thermotactile thresholds for detecting hot and cold temperatures and vibrotactile thresholds at 31.5 and 125 Hz were measured on the index and little fingers of both hands.ResultsIn fingers reported to suffer numbness or tingling, hot thresholds increased, cold thresholds decreased, and vibrotactile thresholds at both 31.5 and 125 Hz increased. With sensorineural symptoms on all three phalanges (i.e. numbness or tingling scores of 6), both thermotactile thresholds and both vibrotactile thresholds had sensitivities greater than 80% and specificities around 90%, with areas under the receiver operating characteristic curves around 0.9. There were correlations between all four thresholds, but cold thresholds had greater sensitivity and greater specificity on fingers with numbness or tingling on only the distal phalanx (i.e. numbness or tingling scores of 1) suggesting cold thresholds provide better indications of early sensorineural disorder.ConclusionsThermotactile thresholds and vibrotactile thresholds can provide useful indications of sensorineural function in patients reporting symptoms of the sensorineural component of HAVS.

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Section: Discussionmentioning

confidence: 99%

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Yao

Griffin

2017

Int Arch Occup Environ Health

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“…The tails of rats in the vibrated group were exposed to sinusoidal vibration (250 Hz, 49 m/s 2 rms) for 4 h/day for 10 consecutive days. This frequency and amplitude was chosen because vibration with these characteristics generate resonance in the rat tail (23) Previous studies have shown that exposure at this frequency has the greatest effect on peripheral vascular and sensorineural function (26, 39), and this is the frequency at which the Pacinian corpuscles are most sensitive (13, 40). A description of the shaker and vibration control system was previously published (23).…”

Section: Methodsmentioning

confidence: 99%

Systemic Effects of Segmental Vibration in an Animal Model of Hand-Arm Vibration Syndrome

Krajnak

Waugh

2018

Journal of Occupational &Amp; Environmental Medicine

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“…These acute and repeated disturbances of different physiological parameters controlling vasoregulation can then accumulate chronically and lead to the occurrence of VWF. The exact mechanisms leading to permanent vascular changes still remain poorly understood [22,34]. In our study, we consider only the indirect neuronal mechanisms of the imbalance of vasoregulation.…”

Section: The Original Strategy Implementedmentioning

confidence: 99%

A Multiscale Approach for Predicting Certain Effects of Hand-Transmitted Vibration on Finger Arteries

et al. 2022

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Prolonged exposure to strong hand-arm vibrations can lead to vascular disorders such as Vibration White Finger (VWF). We modeled the onset of this peripheral vascular disease in two steps. The first consists in assessing the reduction in shearing forces exerted by the blood on the walls of the arteries (Wall Shear Stress—WSS) during exposure to vibrations. An acute but repeated reduction in WSS can lead to arterial stenosis characteristic of VWF. The second step is devoted to using a numerical mechano-biological model to predict this stenosis as a function of WSS. WSS is reduced by a factor of 3 during exposure to vibration of 40 m·s−2. This reduction is independent of the frequency of excitation between 31 Hz and 400 Hz. WSS decreases logarithmically when the amplitude of the vibration increases. The mechano-biological model simulated arterial stenosis of 30% for an employee exposed for 4 h a day for 10 years. This model also highlighted the chronic accumulation of matrix metalloproteinase 2. By considering daily exposure and the vibratory level, we can calculate the degree of stenosis, thus that of the disease for chronic exposure to vibrations.

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Reductions in finger blood flow induced by 125-Hz vibration: effect of location of contact with vibration

Abstract: Differences in vasoconstriction between subjects and between locations are consistent with the Pacinian channel mediating both absolute thresholds and vibration-induced vasoconstriction.

Cited by 10 publications

References 29 publications

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Assessment of thermotactile and vibrotactile thresholds for detecting sensorineural components of the hand–arm vibration syndrome (HAVS)

Systemic Effects of Segmental Vibration in an Animal Model of Hand-Arm Vibration Syndrome

A Multiscale Approach for Predicting Certain Effects of Hand-Transmitted Vibration on Finger Arteries

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