Novel Approach via the Round Ligament in Portal Vein Embolization

Abstract

The objective of this study was to describe the detailed technique and clinical outcomes of portal vein embolization via the round ligament (RL-PVE) prior to major hepatectomy. Between January 2010 and March 2020, a total of 50 portal vein embolization (PVE) procedures were performed in 50 patients. Of them, seven patients who underwent RL-PVE were enrolled in this study. Percutaneous transhepatic portal vein embolization (PTPE) was not indicated due to the following reasons: bile duct dilation (n\u2009=\u20094), difficulty in visualizing the portal vein on ultrasonography because of severe fatty liver (n\u2009=\u20091), large tumor size (n\u2009=\u20091), and combined surgery with staging laparoscopy (n\u2009=\u20091). The following were reasons for avoiding trans-ileocecal PVE: past laparotomy (n\u2009=\u20095), difficulty in accessing the portal vein due to a large tumor (n\u2009=\u20091), and purpose of preventing small intestinal adhesions before hepatopancreatoduodenectomy (n\u2009=\u20091). The percentage of functional hepatic remnant rates was calculated before and after RL-PVE. Technical success was achieved in all cases. Five patients underwent embolization of the right portal vein, while two underwent embolization of the left portal vein. The median operative time and blood loss during RL-PVE were 181 min and 33 g, respectively. Morbidity and mortality related to RL-PVE were not observed. The median functional hepatic remnant rate before and after PVE was 55.6% and 63.2%, respectively. Liver functions including Child–Pugh classification were equivalent before and after RL-PVE. The RL-PVE technique may be useful in elective cases for which it is difficult to safely perform PTPE or trans-ileocecal approaches.