Figure 1: Schema of blood extraction from HV, IH-VC and sites of vascular occlusion. To obtain pure posthepatic blood, the vena cava was occluded between the liver and the right atrium and between the liver and right adrenal vein. Pure HV blood was drawn-out through the catheter. Meanwhile, pure IHVC blood was sampled by the method of syringe puncture under the ligated 7# silk suture.