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. (...)
Mots-clés Pascal : Raynaud maladie, Vibration, Temps exposition, Doigt, Main, Exposition professionnelle, Hémodynamique périphérique, Homme, Trouble dû aux vibrations, Médecine travail, Appareil circulatoire pathologie, Vaisseau sanguin pathologie, Capillaire sanguin pathologie, Peau pathologie, Système nerveux autonome pathologie, Acrosyndrome
Mots-clés Pascal anglais : Raynaud disease, Vibration, Exposure time, Finger, Hand, Occupational exposure, Peripheral hemodynamics, Human, Vibration induced disorder, Occupational medicine, Cardiovascular disease, Vascular disease, Capillary vessel disease, Skin disease, Diseases of the autonomic nervous system, Acrosyndrome
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0258246
Code Inist : 002B12B03. Création : 11/09/1998.