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 may use this test, which checks the level of D-dimer in your blood, to figure out whether you might have a blood clot. You may also hear this test called: Fragment D-dimer test; Fibrin degradation fragment test; When Do I Need This Test? Some tests help you know for sure that a certain disease or condition is causing your symptoms.