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.
Physicians diagnose DVT using ultrasound scanning, which shows the size and location of the blood clot. A blood clot is a mass of blood made up of various components. However, sometimes blood clots form inside blood vessels and don't dissolve naturally. In arteries, these can block the flow of blood carrying essential oxygen and nutrients to all parts of the body. In veins, they can dislodge and travel to the heart or lungs, or block blood flow causing leg swelling. Understanding how blood clots do damage. Both diseases involve inflammation and the formation of blood clots in the veins. In 90 percent of cases, the blood clots occur in the leg and occasionally in the arm.