Surgical treatment of the infra-renal aortic dissection aneurysm WANG Li-xin, FU Wei-guo, GUO Da-qiao, et al. Institute of Vascular Surgery，Zhongshan Hospital，Fudan University, Shanghai 200032，China Corresponding author: FU Wei-guo, E-mail：fu.weiguo@ zs-hospital.sh.cn Abstract Objective To analyze the treatment method choice and efficacy of infra-renal aortic dissection aneurysm (IRADA). Methods The medical records of all patients with IRADA (n= 15) who were treated from January 2004 to July 2009 at Zhongshan Hospital of Fudan University were reviewed retrospectively. The diagnosis was confirmed by CTA or MRA preoperation. Of them, two patients were treated by open surgery with graft replacement (traditional surgery group, TSG); seven patients received endovascular theapy (endovascular therapy group, ETG); six patients were given endovascular therapy combined with open surgery (hybrid treatment group, HTG). The patients were followed up in the 1st, 3rd, 6th month, 1 year later and every 1 year mostly with CTA. Results TSG: The operation time was 3.6h and 2.8h respectively. The blood loss volume was 500mL and 800mL. The two patients were followed up for 1 month and 24 months. CTA check showed that the configuration was satisfied. ETG: The mean operation time was（1.6±0.5）h. The mean blood loss volume was（30±20）mL. The mean follow time was（32±18）months. Minor endoleak was found in one patient in 6 month. No complication was detected in other patients. HTG: The mean operation time was（2.4±0.8）h. The mean blood loss volume was（80±30）mL. The mean follow time was（38±16）months. Moderate anastomosis stenosis of femoral to femoral bapass was observed. Conclusion IRADA could be treated by endovascular therapy and hybrid method effectively. They are less invasive, less operations time needed and recover sooner than TSG.