Duration of acute exposures to vibration and finger circulation
Duration of acute exposures to vibration and finger circulation
Objectives. This study investigated changes in finger circulation after different durations of exposure to hand-transmitted 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 (root-mean-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. Conclusions. Vasoregulatory 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.
Exposure duration, Finger blood flow, Hand-transmitted vibration, Vasoregulatory mechanisms, Vibration-induced white finger
130-137
Bovenzi, Massimo
fc8fbd59-6c3f-46f1-b8f5-2a00b759857c
Lindsell, Christopher J.
b724b896-71a8-4afa-9d3f-d153d63a963b
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
1 January 1998
Bovenzi, Massimo
fc8fbd59-6c3f-46f1-b8f5-2a00b759857c
Lindsell, Christopher J.
b724b896-71a8-4afa-9d3f-d153d63a963b
Griffin, Michael J.
24112494-9774-40cb-91b7-5b4afe3c41b8
Bovenzi, Massimo, Lindsell, Christopher J. and Griffin, Michael J.
(1998)
Duration of acute exposures to vibration and finger circulation.
Scandinavian Journal of Work, Environment and Health, 24 (2), .
(doi:10.5271/sjweh.290).
Abstract
Objectives. This study investigated changes in finger circulation after different durations of exposure to hand-transmitted 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 (root-mean-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. Conclusions. Vasoregulatory 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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Published date: 1 January 1998
Keywords:
Exposure duration, Finger blood flow, Hand-transmitted vibration, Vasoregulatory mechanisms, Vibration-induced white finger
Identifiers
Local EPrints ID: 429462
URI: http://eprints.soton.ac.uk/id/eprint/429462
ISSN: 0355-3140
PURE UUID: af95fdb2-7d57-4a45-acab-882e5fda3319
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Date deposited: 27 Mar 2019 17:30
Last modified: 16 Mar 2024 01:05
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Contributors
Author:
Massimo Bovenzi
Author:
Christopher J. Lindsell
Author:
Michael J. Griffin
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