The development of a type II endoleak domesticated pig model with continuous pressure monitor

Objective To develop a type II endoleak porcine model with continuous pressure monitor by the strain-gauge pressure transducer and the patch. Methods Nine tamed porcine was randomized as the experiment group of 6 domesticated pigs and the control group of 3 domesticated pigs. When the abdominal aortic aneurysm (AAA) was created, the 2nd and 3 rd pair of infrarenal lumber arteries were preserved in the experiment group, while ligated in the control group. The stent-graft was implanted in the endovascular repair. CT angiography was performed to seek endoleak, and the angiography was performed to excluded the type I and type III endoleak. The pressure in the excluded AAA monitored by the strain-gauge pressure transducer was recorded and compared in both groups to evaluated the effect of tyne II endoleak in the experiment group. Results The AAA porcine model with pressure monitor were successfully developed in all 9 porcine. The endoleak and the retrograde flow of the lumber arteries were confirmed by CT angiography in the experiment group. The ratio of the average pressure after the procedure to before the procedure was higher in the experiment group than the control group (U=0.000, P=0.020). The ratio of the pulse pressure after the procedure to the average pressure before the procedure was higher in the experiment group than the control group (U=0.000, P=0.020). Conclusion It is feasible to develop type II endoleak domesticated pig model by preserving the lumber arteries for the retrograde flow, and the AAA model with pressure monitor by the strain-gauge pressure transducer and the patch.