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Endovascular Repair of Complex Aortoiliac Aneurysm with the Sandwich Technique in Sixteen Patients.

BACKGROUND: This study aimed to evaluate the safety and efficiency of the sandwich technique in endovascular repair of complex aortoiliac aneurysm.

METHODS: Sixteen patients (mean age 69.6 years, ranging from 58 to 78 years) with complex aortoiliac aneurysm were studied retrospectively from October 2013 to September 2017 in two vascular centers of teaching hospitals. Computed tomography angiography (CTA) was performed to make individual therapy. They were all performed endovascular repair with sandwich technique, including one with the sandwich, chimney, and fenestrated techniques during the same procedure. All patients were followed up at 1 month, 3 months, 6 months, 12 months, and yearly thereafter with X-ray, ultrasound, and/or CTA.

RESULTS: The initial technical success was 81.25%, and the assisted technical success was 100%. At final angiography, little flow of a type I and a type III endoleak was found in two patients with observation. Two type II endoleaks were also detected. During the perioperative period, two patients suffered myocardial infarction. One pulmonary infection and one urinary infection happened. No death or cerebrovascular events occurred. During the follow-up (mean 18 months, ranging from 2 to 45 months), three stent occlusions were detected. One case got reintervened for his external iliac artery stent thrombosis in the first month postoperatively. The other two were under observation. A readmission happened to one man for his right brachial artery pseudoaneurysm in the third month postoperatively. One patient died of nonaneurysmal related reason in the eighth month. No aneurysmal related death, rupture, or new endoleak was found. No paralysis, claudication, or bowel ischemia was complained of. The primary patency of the preserved branches were 94.7%, 92.0%, 92.0%, 92.0%, 92.0% separately in first, sixth, 12th, 24th, and 36th month.

CONCLUSIONS: For patients who are not candidates for open surgery or conventional endovascular repair with complex aortoiliac aneurysm, the sandwich technique is a feasible alternative to management.

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