RESUMEN
<p><b>OBJECTIVE</b>To explore the role of extrahepatic control on blood flow of hepatic vein and inferior vena cava in hepatectomy, and observe its effect on minimizing hemorrhage.</p><p><b>METHODS</b>From 2001 to April 2003, 33 patients who had liver tumors involving segment IV, VII, VIII or half liver underwent major hepatectomies that required exposure of the inferior vena cava and main trunks of hepatic veins, during which the major hepatic veins and inferior vena cava were isolated and taped to control blood flow when necessary.</p><p><b>RESULTS</b>In 33 attempts, 32 were successful and all tumors were resected successfully. The placement of occlusion tape was unsuccessful in 1 case. 7 cases did not need blood transfusion during operation. The amount of blood transfusion for other cases were form 0 to 1 600 ml. there was no operative mortality.</p><p><b>CONCLUSIONS</b>Appropriate control of main truck of hepatic vein and inferior vena cava is effective in reducing blood loss during hepatectomies. It is also very helpful for performing difficult hepatectomies.</p>