Purpose Assess electromagnetically guided in situ fenes-
tration of juxtarenal aortic stent grafts in an in vivo model.
Methods Using a newly developed electromagnetic guid-
ance system together with a modified, electromagnetically
guidable catheter with steerable tip, an electromagnetically
trackable guidewire and a custom in situ fenestrateable
stent graft, a series of seven animal experiments was per-
formed. In a swine model, stent grafts were placed
juxtarenally, covering the renal arteries. Subsequently, the
perfusion of the renal arteries was restored using electro-
magnetically guided in situ fenestration of the graft at the
renal ostia followed by covered stent placement. Inter-
vention times and technical success were assessed.
Results The individual components were successfully
combined for the animal experiments. Thirteen of fourteen
fenestration experiments in seven animals were successful

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• Electromagnetically Navigated In Situ Fenestration of Aortic Stent Grafts: Pilot Animal Study of a Novel Fenestrated EVAR Approach