A venous ultrasound provides images of the veins throughout the body. The most common reason for a venous ultrasound is to search for blood clots, especially in the veins of the leg. This condition is often referred to as Deep Vein Thrombosis or DVT.
These blood clots can break off and pass into the lungs, where they can cause a dangerous condition called pulmonary embolism. However, if the blood clot in the leg is found early enough, treatment can be started to prevent it from passing to the lung.