Hemodynamic Conditions may Influence the Oversizing of Stent Grafts and the Postoperative Surveillance of Patients with Ruptured Abdominal Aortic Aneurysm Treated by EVAR.

BACKGROUND

To report the causes of second rupture in patients treated with a stent graft for ruptured abdominal aortic aneurysm (rAAA).

CASE REPORT: A 69-year-old man was admitted for abdominal pain and hypovolemic shock 22 months after endovascular exclusion of an rAAA with an aortomonoiliac stent graft and a crossover bypass despite normal duplex ultrasound and sac shrinkage at 1 year. During emergent laparotomy, a type IA endoleak was discovered and the aortomonoiliac stent graft was explanted. A Dacron bypass was interposed between the infrarenal aorta and the iliac extension stent graft.

CONCLUSIONS

Considering the literature, this report has 3 implications for the endovascular treatment of rAAA. First, 30% oversizing is preferable to 15% when treating an rAAA assessed by computed tomography angiography (CTA) performed during permissive hypotension. Second, the surveillance program should rely on CTA and not on a duplex examination to detect any endoleaks or migration. Finally, partial stent graft explantation is a valid option for decreasing aortic clamping time.