Endovascular treatment of superior mesenteric artery pseudoaneurysms using covered stents in six patients

OBJECTIVE. The objective of our study was to evaluate our experience with the use of endovascular treatments for superior mesenteric artery (SMA) pseudoaneurysms using covered stents. MATERIALS AND METHODS. Between 2002 and 2011, six patients (mean age, 41.7 years; range, 23-65 years) with SMA pseudoaneurysms were treated percutaneously with the placement of covered stents at our institution. The causes of SMA pseudoaneurysms were penetrating trauma (n = 2), blunt trauma (n = 1), and previous surgical procedures (n = 3). The mean diameter of the SMA pseudoaneurysms was 16 mm (range, 4-24 mm). Technical success and clinical success were retrospectively analyzed. RESULTS. Immediate technical success, defined as exclusion of the pseudoaneurysm and lack of active extravasation, was achieved in all six patients. Secondary balloon angioplasty was needed in one patient with residual narrowing. There was a small dissection of the proximal SMA necessitating placement of a second bare stent across the dissection. A second covered stent (Fluency stent, 8 mm) was placed in the same patient because of recurrent bleeding due to a type II endoleak 5 days after the first covered stent had been placed. This patient had no subsequent episodes of bleeding or bowel ischemia. Follow-up CT in the remaining five patients (mean, 21 months; range, 1-58 months) confirmed stent patency and preserved distal arterial flow to the bowel without episodes of bleeding or bowel ischemia during follow-up (mean, 27 months; range, 11-58 months). CONCLUSION. Percutaneous endovascular treatment using a covered stent may be a safe and feasible tool for SMA pseudoaneurysms.