ObjectiveTo investigate the clinical efficiency of pelvic and sacrum tumor surgery using sizing balloon occlusion of the lower abdominal aorta. MethodsFrom January 2005 to June 2011, 156 patients were diagnosed to have sacrum or pelvic tumor and underwent surgery in our institution. Temporary balloon occlusion of abdominal aorta was used in 51 patients during the resection of sacrum and pelvic tumors (balloon group). Another 105 patients received the traditional surgery resection (control group). The results of the whole operation time, the volume of blood loss and transfusion, the complication and the total days of stay in hospital in the two groups were compared with each other. ResultsAfter the abdominal aorta was occluded, 92.2% of the patients in the balloon group had holistic resection or edge resection, while the number was 86.7% for the control group. In the balloon group, the average operation time was (171.96±65.16) minutes, the average intraoperative blood loss was (746.86±722.73) mL, and the blood transfusion was (411.76±613.73) mL. The postoperative lead flow was (294.50±146.09) mL, and the postoperative tube removal was within (2.98±1.07) days. Improvement of patients'condition was significantly better than the control group (P<0.05). No significant difference was found in the total days of stay in hospital and the postoperative complications between the two groups (P>0.05). ConclusionUsing abdominal aorta occlusion can effectively control intraoperative hemorrhage, and show the operation field clearly. It also can reduce operation time and control the blood transfusions. Appropriately extended balloon blocking time can obviously improve the tumor removal rate and the safety of the operation.