These serve to shunt blood from the arterial to the venous side of the vascular system, thereby avoiding the capillaries, where exchange of oxygen and heat takes place.

In the adjacent region of HCH, arterial-portal venous shunt (APVS) was found in 9 lesions and hepatic capsular retraction (HCR) in 4 lesions.

On the one hand, traffic micro-circulation can shunt traffic of arterial roads and smooth traffic running;