Applied Force Alters Sensorineural and Peripheral Vascular Function in a Rat Model of Hand-Arm Vibration Syndrome.

This study described the effects of applied force (grip) on vascular and sensorineural function in an animal model of hand-arm vibration syndrome (HAVS).Rat tails were exposed to 0, 2 or 4 newtons (N) of applied force 4 hr/day for 10 days. Blood flow and sensitivity to transcutaneous electrical stimulation and pressure were measured.Applied force increased blood flow but reduced measures of arterial plasticity. Animals exposed to force tended to be more sensitive to 250 Hz electrical stimulation and pressure applied to the tail.Effects of applied force on blood flow and sensation are different than those of vibration. Studies examining co-exposures to force and vibration will provide data that can be used to determine how these factors affect risk of workers developing vascular and sensorineural dysfunction (i.e., HAVS).