Thrombosis. Venous thrombosis. a Partial thrombosis of right jugular vein: color Doppler (jugular vein in blue, carotid artery in red). b Complete acute hypoechoic thrombosis of left jugular vein (yug): transverse view. Carotid artery is seen in red (car). c Post trauma partial venous thrombosis. d Chronic thrombosis: partial recanalization: multiple color tunnels are seen inside the thrombus. Point-of-care ultrasound and Doppler ultrasound evaluation of vascular injuries in penetrating and blunt trauma. Critical Ultrasound Journal. Not Altered. CC.