Pathology: Blood or qi deficiency. This is seen in cases of deficiencies and failure of Qi and blood. It can also be seen in disharmonies of the even emotions, weakness in Yang Qi, internal damage to jing, and penetration of dampness.
Testing for venous blood clots. Venous blood clots may be detected in a variety of ways, though ultrasound is most commonly used. Occasionally, the patient's size and shape limit the ability for ultrasound to provide a definitive answer. Venography is an alternative test to look for a clot.
Your doctor can use it to check for issues with blood flow, such as clots in your veins or blockages in your arteries. Itâs one of the main ways to test for deep vein thrombosis -- a condition where blood clots form in veins deep in your body, usually in your legs.