[Vibration-induced angiopathy: significance of urinary beta-thromboglobulin increase after cold test].

Twenty subjects working with tools generating 100-400 Hz vibrations were submitted to volumetric pulse-plethysmography with cold Test (C.T.) and to the measurement of BTGU, a thromboxane urinary catabolite. After C.T. an increase of BTGU was observed, which attained statistical significance in the subgroup with the most evident plethysmographic modifications. The meaning of these findings is discussed, also in the light their apparent contrast with some literature data. The AA believe that the prostaglandin balance can actually play a role in the pathogenesis of C.T.-induces vasomotor changes, if the tools used generate a sufficiently high number of Hz and if the workers are still rather young. This last condition corresponds to a greater intactness of endothelia and thus to the ability to modulate the vasomotor response ("hunting reaction"). This would lead to the activation of more complex pathogenetic mechanism (also biohumoral ones) among which is thromboxane release.