What is use of portal embolisation?

In patients undergoing hepatic arterial embolization of liver tumors occlusion of the right or left portal venous branches results in profound ipsilateral hepatic atrophy and contralateral hypertrophy Intentional occlusion of a major portal vein branch (usually the right side) is a procedure being used with greater frequency prior to major hepatic resection ->Atrophy of the liver to be resected, Hypertrophy of the future liver remnant, The risk of postoperative hepatic failure may be reduced