A Promising Treatment of Distal Entry Tears Located in Branched Area of Abdominal Aorta With Coil-Stent Tear Occlusion Device: an Animal Experiment

This study aims to evaluate the effect of coil-stent tear occlusion device in treating entry tears located in branched area of abdominal aorta. An abdominal aortic dissection animal model was constructed by mesh suturing method. The animal models were treated by the occlusion device and were evaluated by computed tomography angiography (CTA) 1 month later. Eighteen pigs were adopted in the abdominal aortic dissection modeling experiment, two of them died of cardiopulmonary arrest during the operation. Sixteen models survived, two of them were found complete false lumen thrombosis by CTA 3 days after the operation. The false lumen kept patency in the remaining 14 cases which were then implanted with the occlusion device. The procedure was successful in 13 cases except for one. The coil-stent tear occlusion device provides a novel method for tears located in the branched area of abdominal aorta, and is worth of further study.