Histological examination showed that the transected lesion, identified in the defect of the elastic endothelial layer (triangles), was plugged with coagulated fibrin and surrounding connective tissue of the adventitia are coagulated showing fused collagen in the absence of tissue carbonization (Fig. 2). This phenomenon was estimated to be established by the momentary coagulation of the plasma fibrinogen into the fibrin and protein in the adventitia.