Objectives-To investigate the changes over a workshift in fingertip tactile perception thresholds in users of impact wrenches exposed to intermittent hand transmitted vibration.
A further aim was to assess the relation between acute changes in tactile sensation, sensorineural disorders, and vibration dose.
Methods-The study populations consisted of 30 workers exposed to vibration (16 men and 14 women) and 25 control manual workers (10 men and 15 women).
Sensorineural disorders in the fingers and hands were graded according to the staging system of the Stockholm workshop scale.
Tactile function was tested by measuring aesthesiometric thresholds (two point discrimination and depth sense perception) and vibrotactile perception thresholds at 16,31.5, and 125 Hz before and after a workshift.
Temporary threshold shift was then calculated as the difference between threshold measures before and after the shift.
The measurement and assessment of exposure to vibration were made according to the international standard ISO 5349.
The vibration dose accumulated over a workshift (m2s-4h) was estimated for each user of impact wrenches.
Daily exposure to vibration was also expressed in terms of eight hour energy equivalent frequency weighted acceleration ( (ahw) eq (8) in ms-2 rms).
After adjustment for age and alcohol consumption, vibrotactile perception thresholds before exposure were greater in the workers exposed to vibration than in the controls. (...)
Mots-clés Pascal : Doigt, Sensibilité tactile, Trouble dû aux vibrations, Exposition professionnelle, Médecine travail, Homme, Perception sensorielle, Relation dose réponse, Dose seuil
Mots-clés Pascal anglais : Finger, Tactile sensitivity, Vibration induced disorder, Occupational exposure, Occupational medicine, Human, Sensorial perception, Dose activity relation, Threshold dose
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0464098
Code Inist : 002B16I. Création : 03/02/1998.