Academician WANG Yongyan suggests that although the method of invigorating the circulation of blood

dissipating blood stasis and dredging collaterals are all used on blood stasis syndrome

they aim on different layers of depth. That is

invigorating the circulation of blood

dissipating blood stasis and dredging collaterals are three steps to treat different states of blood stasis. The method of invigorating the circulation of blood

dissipating blood stasis and dredging collaterals

the severeness of blood stasis and the depth of pathological location were usually taken into consideration on choosing different treatment to dissipate blood stasis. Syndrome of disharmony in Qi and blood has a relatively shorter course of disease and less severe conditions

so regulating Qi and invigorating the blood is adapted; syndrome of blood accumulating to stagnation has a relatively longer course and more severe conditions

so invigorating the blood and dissipating blood stasis is appropriate; syndrome of blood stasis clotting collaterals has the longest course with lingering relapses

so dissipating blood stasis and dredging collaterals is in order. Medication should be applied layer by layer in depth

while treatment time should be longer and longer

so as to make the medicine reach pathological locations and expell the disease of stasis.